Relay

Abstract

The present disclosure relates to a relay, comprising a pair of stationary contact members, a pair of conductive members, and a movable contact member. The pair of stationary contact members are arranged in a first direction. Each conductive member has a conductive portion; the conductive portions of the pair of conductive members are respectively connected to the pair of stationary contact members, and extend away from each other in the first direction, the end of each conductive portion away from the stationary contact member being a stationary contact point. The movable contact member is configured to come into contact with or separate from the stationary contact points of the conductive portions of the pair of conductive members, and the respective orthogonal projections of the movable contact member and the conductive portions on a target plane overlap. The target plane is perpendicular to the direction of movement of the movable contact member.

Description

relay

[0001] This disclosure claims priority to Chinese patent application No. 202411896780.2, filed on December 20, 2024; and Chinese patent application No. 202510421318.5, filed on April 3, 2025; and Chinese patent application No. 202510421186.6, filed on April 3, 2025, and requires that the entire contents of the three Chinese patent applications be incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of electrical control device technology, and more specifically, to a relay. Background Technology

[0003] 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.

[0004] A relay comprises a stationary contact, a moving contact, a push rod assembly, and a magnetic circuit. When the coil of the magnetic circuit is energized or de-energized, the magnetic circuit drives the push rod assembly to move, which in turn moves the moving contact, causing it to contact or separate from the stationary contact. After the moving contact contacts the stationary contact, an electric arc can easily be generated between them. If the arc is not stretched in time, it can easily burn the stationary and / or moving contact, thus affecting the electrical durability of both components. Summary of the Invention

[0005] This disclosure provides a high-voltage DC relay that can promptly lengthen the arc generated between the moving and stationary contacts, thereby improving the electrical durability of the stationary and moving contacts.

[0006] The relay of this disclosure embodiment includes:

[0007] A pair of stationary contacts are arranged along a first direction;

[0008] A pair of conductive elements, each having a conductive portion, the conductive portions of the pair of conductive elements being respectively connected to a pair of stationary contacts and extending along the first direction in a direction away from each other, the end of the conductive portion away from the stationary contact being a stationary contact point; and

[0009] A moving contact is used to contact or separate from the stationary contact of the conductive portion of a pair of conductive elements, and the moving contact and the conductive portion have overlapping projections on a target plane.

[0010] The target plane is perpendicular to the direction of movement of the moving contact.

[0011] According to some embodiments of this disclosure, the conductive member further includes a first arc-guided portion, which is connected to one end of the conductive member away from the stationary contact member and extends from the conductive member in a direction away from the moving contact member and the stationary contact member.

[0012] According to some embodiments of this disclosure, the first arc-guided portions of a pair of conductive elements are symmetrically arranged in the first direction.

[0013] According to some embodiments of this disclosure, the first arc-guiding portion and the conductive portion are either an integral structure or separate structures.

[0014] According to some embodiments of this disclosure, the moving contact includes:

[0015] The body, with two ends along the first direction for contacting or separating from the stationary contacts of the conductive portions of the pair of conductive elements, respectively; and

[0016] Two second guide arc portions are respectively connected to the two ends of the body along the first direction, and the second guide arc portions extend from the body in a direction away from the conductive element and the static contact element.

[0017] According to some embodiments of this disclosure, the two second guide arc portions are symmetrically arranged in the first direction.

[0018] According to some embodiments of this disclosure, the second guide arc portion and the main body are either an integral structure or separate structures.

[0019] According to some embodiments of this disclosure, the relay further includes:

[0020] Two arc-extinguishing grid assemblies are arranged at intervals along the first direction, and the moving contact is located between the two arc-extinguishing grid assemblies. The second arc-guiding portion of the moving contact extends toward the arc-extinguishing grid assembly. The arc-extinguishing grid assembly includes a plurality of arc-extinguishing grid plates, which are arranged at intervals along the movement direction of the moving contact.

[0021] According to some embodiments of this disclosure, the conductive part and the static contact are either an integral structure or separate structures.

[0022] According to some embodiments of this disclosure, the moving contact includes a body, with two ends of the body along the first direction for contacting or separating from the stationary contacts of the conductive portions of a pair of conductive members, respectively; the conductive portions are parallel to the body.

[0023] According to some embodiments of this disclosure, the relay further includes an insulating cover made of ceramic material, the insulating cover comprising:

[0024] The static contact element is mounted on the top wall;

[0025] A sidewall, connected to the top wall, is located around the moving contact.

[0026] A relay according to an embodiment of this disclosure includes:

[0027] A pair of stationary contacts;

[0028] A pair of conductive elements, respectively connected to a pair of said stationary contacts; and

[0029] A moving contact for contacting or separating from a pair of said conductive elements;

[0030] The moving contact is in contact with a pair of conductive elements, and when current flows through the stationary contact, the conductive elements and the moving contact, the current in the two conductive elements flows in the same direction and in the opposite direction to the current in the moving contact.

[0031] One embodiment disclosed above has at least the following advantages or beneficial effects:

[0032] When current flows through a pair of stationary contacts of a relay, the current flows in the same direction in the conductive parts of the pair of conductive parts, while the current flows in the opposite direction in the moving contact. Therefore, the opposite current flow between the moving contact and the conductive part creates a repulsive force along a second direction between the moving contact and the conductive part. This second direction is the separation direction of the moving and stationary contacts. The repulsive force generated by the opposite current facilitates rapid separation between the moving contact and the conductive part, thus quickly lengthening the arc generated between them, shortening the arc extinguishing time, preventing arc erosion of the moving and stationary contacts, and improving the electrical durability of both the moving and stationary contacts. Attached Figure Description

[0033] Figure 1 shows a cross-sectional view of a relay according to Embodiment 1 of this disclosure, wherein the push rod component is omitted.

[0034] Figure 2 shows a three-dimensional schematic diagram of the moving contact.

[0035] Figure 3 shows a schematic diagram of the static contact and conductive components after assembly.

[0036] Figure 4 shows a schematic diagram of an arc-extinguishing grid assembly provided on both sides of the moving contact along the first direction.

[0037] Figure 5 is a three-dimensional schematic diagram of the relay according to Embodiment 2 of this disclosure.

[0038] Figure 6 is a sectional view after being cut along the A1-A1 section line in Figure 5.

[0039] Figure 7 is a magnified view of X3 in Figure 6.

[0040] Figure 8 is a three-dimensional schematic diagram of the arc extinguishing assembly.

[0041] Figure 9 is a three-dimensional schematic diagram of the arc-extinguishing grid assembly.

[0042] Figure 10 is a three-dimensional schematic diagram of the mounting plate.

[0043] Figure 11 is a three-dimensional schematic diagram of the grid.

[0044] Figure 12 is a cross-sectional view of the relay according to Embodiment 3 of this disclosure.

[0045] Figure 13 is a partial enlarged view of X1 in Figure 12.

[0046] Figure 14 is a cross-sectional view of the relay according to Embodiment 4 of this disclosure.

[0047] Figure 15 is a magnified view of X2 in Figure 14.

[0048] Figure 16 is a cross-sectional view of the relay of Embodiment 5 of this disclosure.

[0049] Figure 17 is a three-dimensional schematic diagram of the assembled conductive and static components in Figure 16.

[0050] Figure 18 is a cross-sectional view of a relay according to Embodiment Six of this disclosure.

[0051] Figure 19 is a perspective view of the relay according to Embodiment Seven of this disclosure.

[0052] Figure 20 is a sectional view after being cut along the A2-A2 section line in Figure 19.

[0053] Figure 21 is a three-dimensional schematic diagram of the assembled conductive and static components.

[0054] Figure 22 is another three-dimensional schematic diagram of the arc extinguishing component.

[0055] Figure 23 is another three-dimensional schematic diagram of the arc-extinguishing grid assembly.

[0056] Figure 24 is another three-dimensional schematic diagram of the mounting plate.

[0057] Figure 25 is another three-dimensional schematic diagram of the grid plate.

[0058] Figure 26 is a cross-sectional view of the relay of Embodiment 8 of this disclosure.

[0059] 100. Magnetic circuit section; 210. Insulating cover; 211. Top wall; 212. Side wall; 220. Frame plate; 230. Yoke plate; 300. Static contact; 400. Conductive component; 410. Conductive part; 420. First arc guiding part; 500. Moving contact; 510. Body; 520. Second arc guiding part; 600. Arc extinguishing grid assembly;

[0060] 100a, Contact cavity; 101a, Contact chamber; 102a, Receiving space; 110a, Insulating cover; 111a, Ceramic cover; 112a, Frame plate; 130a, Yoke plate; 200a, Contact assembly; 210a, Static contact; 211a, Static component; 211-1a, Insertion part; 211-2a, Exposed part; 212a, Conductive component; 213a, Connecting part; 214a, First arc guide part; 2 15a, Contact part; 220a, Moving contact element; 221a, Top surface; 222a, Side surface; 230a, Second arc guide part; 240a, Arc guide structure; 241a, Chamfer; 300a, Arc extinguishing assembly; 310a, Arc extinguishing grid assembly; 311a, Mounting part; 3111a, Mounting plate; 312a, Grid plate; 313a, Snap-in hole; 314a, Snap-in part; 320a, Isolation seat; 600a, Push rod component;

[0061] 100b, Contact cavity; 101b, Contact chamber; 102b, Receiving space; 110b, Insulating cover; 111b, Ceramic cover; 112b, Frame plate; 130b, Yoke plate; 200b, Contact assembly; 210b, Static contact; 211b, Static component; 211-1b, Insertion part; 211-2b, Exposed part; 212b, Conductive component; 213b, Connecting part; 214b, First arc guiding part; 215b, Contact part; 220b, Moving contact; 230b, Second arc guiding part; 300b, Arc extinguishing assembly; 310b, Arc extinguishing grid assembly; 311b, Mounting component; 3111b, Mounting plate; 312b, Grid plate; 313b, Snap-in hole; 314b, Snap-in part; 320b, Isolation seat; 600b, Push rod component; 710b, Exciter. Detailed Implementation

[0062] 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 disclosure 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.

[0063] It is understood that the terms "comprising" and "having," and any variations thereof, used in the embodiments of this disclosure, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus 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 such processes, methods, products, or apparatus.

[0064] Example 1:

[0065] As shown in Figures 1 to 3, the relay of Embodiment 1 of this disclosure includes a magnetic circuit part 100, a yoke plate 230, an insulating cover 210, a push rod component (not shown in the figure), a pair of stationary contacts 300, a pair of conductive components 400, and a moving contact 500.

[0066] The insulating cover 210, the stationary contact 300, the conductive component 400, and the moving contact 500 are located on one side of the yoke plate 230 along its thickness direction, while the magnetic circuit portion 100 is located on the other side of the yoke plate 230 along its thickness direction. The yoke plate 230 has a through hole (not shown) that extends through the yoke plate 230 along its thickness direction. The push rod component is movably inserted through this through hole.

[0067] A pair of stationary contacts 300 are mounted on an insulating cover 210, and a moving contact 500 is mounted on a push rod member. The magnetic circuit part 100 can drive the push rod member to move, thereby causing the moving contact 500 to move, so that the moving contact 500 can be connected or disconnected from the pair of stationary contacts 300.

[0068] The insulating cover 210 is made of ceramic and can be connected to the yoke plate 230 via a frame plate 220. The frame plate 220 can be a ring-shaped metal component, such as an iron-nickel alloy. One end of the frame plate 220 is connected to the opening edge of the insulating cover 210, for example, by laser welding, brazing, resistance welding, or adhesive bonding. The other end of the frame plate 220 is connected to the yoke plate 230, also by laser welding, brazing, resistance welding, or adhesive bonding. A frame plate 220 is provided between the insulating cover 210 and the yoke plate 230 to facilitate their connection.

[0069] As shown in Figure 1, the insulating cover 210 includes a top wall 211 and a side wall 212. A stationary contact 300 is mounted on the top wall 211. One end of the side wall 212 is connected to the top wall 211, and the other end of the side wall 212 is connected to the yoke plate 230 via a frame 220. The side wall 212 has a ring-shaped structure and is located around the moving contact 500. The side wall 212 of the insulating cover 210, located around the moving contact 500, serves to cool the electric arc.

[0070] The sidewall 212 can be a rectangular ring structure, a circular ring structure, or a ring structure of other shapes, and this disclosure does not make any special limitation in this regard.

[0071] For ease of explanation, the arrangement direction of a pair of stationary contact members 300 is defined as the first direction D1, and the movement direction of the moving contact member 500 is defined as the second direction D2. The first direction D1 is perpendicular to the second direction D2.

[0072] Each conductive element 400 has a conductive portion 410. The conductive portions 410 of a pair of conductive elements 400 are respectively connected to a pair of stationary contacts 300 and extend in a direction away from each other along the first direction D1. The end of the conductive portion 410 away from the stationary contact 300 is a stationary contact.

[0073] The moving contact 500 is used to contact or separate from the stationary contact of the conductive part 410 of a pair of conductive parts 400, and the orthographic projections of the moving contact 500 and the conductive part 410 on a target plane overlap; wherein the target plane is perpendicular to the movement direction (second direction D2) of the moving contact 500.

[0074] As shown in Figure 1, if the current flows in from the stationary contact 300 on the left and flows out from the stationary contact 300 on the right, the current flow direction of the relay is as follows: first, it flows from the stationary contact 300 on the left into the conductive part 410 of the conductive member 400 on the left, then into the moving contact 500, then from the moving contact 500 into the conductive part 410 of the conductive member 400 on the right, and finally flows out from the stationary contact 300 on the right.

[0075] It can be seen that when current flows through a pair of stationary contacts 300 of the relay, the current flow direction of the conductive parts 410 of a pair of conductive parts 400 is the same, while the current flow direction of the moving contact 500 is opposite to that of the conductive parts 410. Therefore, the current flow direction of the moving contact 500 and the conductive parts 410 is opposite, and the opposite current can form a repulsive force along the second direction D2 between the moving contact 500 and the conductive parts 410. The second direction D2 is the separation direction of the moving and stationary contacts of the moving contact 500 and the conductive parts 410. Therefore, the repulsive force generated by the opposite current is conducive to the rapid separation of the moving contact 500 and the conductive parts 410, so as to quickly lengthen the arc generated between the moving contact 500 and the conductive parts 410, thereby shortening the arc extinguishing time, avoiding arc erosion of the moving and stationary contacts, and improving the electrical durability of the moving contact 500 and the stationary contact 300. At the same time, as the arcing time decreases, the increase in air pressure inside the insulating cover 210 also decreases, thus preventing an explosion due to overpressure in the insulating cover 210.

[0076] Furthermore, it is understandable that the greater the current flowing through the pair of stationary contacts 300 of the relay, the greater the repulsive force will be. When a load current flows through the pair of stationary contacts 300, the repulsive force generated between the moving contact 500 and the conductive part 410 can quickly bounce the moving contact 500 away, which helps to limit the peak current and improve safety.

[0077] As shown in Figures 1 and 3, the conductive element 400 further includes a first arc-guided portion 420, which is connected to the end of the conductive element 410 away from the stationary contact 300 and extends from the conductive element 410 in a direction away from the moving contact 500 and the stationary contact 300.

[0078] In the first embodiment of this disclosure, by providing a first arc-guiding portion 420, the electric arc generated between the moving contact 500 and the conductive portion 410 can be elongated along the extending direction of the first arc-guiding portion 420, thereby further shortening the arc extinguishing time and preventing the arc from burning the moving and stationary contacts for a long time. In addition, with the help of the first arc-guiding portion 420, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion 420, 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 resistance between the moving and stationary contacts.

[0079] Among them, the phenomenon of "pointing out" 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.

[0080] In one embodiment, the first arc-guided portions 420 of a pair of conductive elements 400 are symmetrically arranged in a first direction D1.

[0081] Of course, in other embodiments, the first arc portion 420 of a pair of conductive elements 400 may also be asymmetrically arranged. For example, one of the first arc portion 420 may be longer than the other; or, one of the first arc portion 420 may form a smaller angle with the corresponding conductive portion 410, while the other may form a larger angle with the corresponding conductive portion 410.

[0082] In one embodiment, the conductive part 410 and the static contact 300 can be an integral structure or separate structures. When the conductive part 410 and the static contact 300 are separate structures, they can be connected by riveting, welding, gluing, or other methods. When the conductive part 410 and the static contact 300 are an integral structure, they can be formed by machining, punching, powder metallurgy, casting, or other methods.

[0083] Furthermore, the first arc-guiding portion 420 and the conductive portion 410 can be an integral structure or separate structures.

[0084] As shown in Figures 1 and 2, the moving contact 500 includes a body 510 and two second arc-shaped portions 520. The body 510 can be an elongated structure, and its length direction is parallel to the first direction D1. The two ends of the body 510 along the first direction D1 are used to contact or separate from the stationary contacts of the conductive portions 410 of a pair of conductive members 400, respectively. The two second arc-shaped portions 520 are respectively connected to the two ends of the body 510 along the first direction D1, and the second arc-shaped portions 520 extend from the body 510 in a direction away from the conductive members 400 and the stationary contact 300.

[0085] In Embodiment 1 of this disclosure, the corresponding second arc-guiding portion 520 and first arc-guiding portion 420 can elongate the arc generated between the moving contact 500 and the conductive portion 410, thereby further shortening the arc extinguishing time and preventing the arc from burning the moving and stationary contacts for a long time. In addition, the first arc-guiding portion 420 and the second arc-guiding portion 520 can jointly transfer the arc from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion 420 and / or the second arc-guiding portion 520, thereby reducing the loss 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.

[0086] As an example, the conductive portion 410 of the conductive member 400 is parallel to the body 510 of the moving contact member 500.

[0087] In one embodiment, two second guide arc portions 520 are symmetrically arranged in the first direction D1.

[0088] Of course, in other embodiments, the two second guide arc portions 520 may also be arranged asymmetrically. For example, one of the second guide arc portions 520 may be longer than the other; or, one of the second guide arc portions 520 may form a smaller angle with the body 510, while the other second guide arc portion 520 may form a larger angle with the body 510.

[0089] In one embodiment, the second guide arc portion 520 and the body 510 are either an integral structure or separate structures. When the second guide arc portion 520 and the body 510 are separate structures, they can be connected by riveting, welding, gluing, or other methods. When the second guide arc portion 520 and the body 510 are an integral structure, the actuating contact element 500 can be formed by machining, punching, powder metallurgy, casting, or other methods.

[0090] As shown in Figure 4, the relay also includes two arc-extinguishing grid assemblies 600, which are disposed within the insulating cover 210 and spaced apart along the first direction D1. A moving contact 500 is located between the two arc-extinguishing grid assemblies 600. The second arc-guiding portion 520 of the moving contact 500 extends towards the arc-extinguishing grid assembly 600, and the first arc-guiding portion 420 extends towards the arc-extinguishing grid assembly 600. Each arc-extinguishing grid assembly 600 includes multiple arc-extinguishing grid plates, which are spaced apart along the movement direction of the moving contact 500.

[0091] In the first embodiment of this disclosure, the moving contact 500 is provided with arc-extinguishing grid assemblies 600 on both sides along the first direction D1. When the electric arc generated between the moving contact 500 and the conductive part 410 is elongated, the electric arc can quickly enter the arc-extinguishing grid assembly 600. The multiple arc-extinguishing grid plates of the arc-extinguishing grid assembly 600 isolate the electric arc to extinguish it, further shortening the arc extinguishing time and avoiding the electric arc from burning the moving and stationary contacts for a long time.

[0092] In summary, the relay of Embodiment 1 of this disclosure has at least the following advantages and beneficial effects:

[0093] When current flows through a pair of stationary contacts 300 of the relay, the current flows in the same direction in the conductive portions 410 of a pair of conductive elements 400, while the current flows in the opposite direction in the moving contact 500 to the conductive portions 410. Therefore, the opposite current flows in the moving contact 500 and the conductive portions 410, creating a repulsive force along a second direction D2 between the moving contact 500 and the conductive portions 410. This second direction D2 is the separation direction of the moving and stationary contacts of the moving contact 500 and the conductive portions 410. The repulsive force generated by the opposite current facilitates rapid separation between the moving contact 500 and the conductive portions 410, thereby quickly lengthening the arc generated between them, shortening the arc extinguishing time, preventing arc erosion of the moving and stationary contacts, and improving the electrical durability of the moving contact 500 and the stationary contact 300. At the same time, as the arcing time decreases, the increase in gas pressure inside the insulating cover 210 also decreases, thus preventing an explosion due to overpressure in the insulating cover 210.

[0094] Furthermore, it is understandable that the greater the current flowing through the pair of stationary contacts 300 of the relay, the greater the repulsive force will be. When a load current flows through the pair of stationary contacts 300, the repulsive force generated between the moving contact 500 and the conductive part 410 can quickly bounce the moving contact 500 away, which helps to limit the peak current and improve safety.

[0095] Furthermore, electric arcs are 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 address the problem of arc erosion of the moving and stationary contacts, related technologies employ 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.

[0096] This disclosure also provides a relay to further shorten the arc extinguishing time.

[0097] According to one aspect of this disclosure, an embodiment of the relay includes: a contact cavity having a contact chamber; at least one set of contact components, the contact components including a moving contact and two stationary contacts, each stationary contact having a stationary component and a conductive component, the stationary component being mounted on the top of the contact cavity, the two conductive components being respectively connected to the two stationary components, and the two conductive components extending in a direction of mutual proximity; the moving contact being movably disposed within the contact chamber for contacting or separating from the two conductive components; and an arc guiding structure disposed on the moving contact and configured to guide the flow of an electric arc generated by the moving contact and the stationary contacts during contact separation.

[0098] According to one embodiment of this disclosure, 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.

[0099] According to one embodiment of the present disclosure, the stationary contact member has a receiving space on the side facing the moving contact member, and the second guide arc portion extends obliquely from the moving contact member toward the receiving space and away from the stationary contact member.

[0100] According to one embodiment of this disclosure, 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.

[0101] According to one embodiment of the present disclosure, 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 mounted on the top of the insulating cover.

[0102] 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.

[0103] According to one embodiment of this disclosure, 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.

[0104] According to one embodiment of this disclosure, the second arc-shaped portion and the moving contact member are integrally connected; or, the second arc-shaped portion and the moving contact member are separately connected.

[0105] According to one embodiment of the present disclosure, the stationary 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.

[0106] According to one embodiment of the present disclosure, the tilting direction of the first guide arc portion is arranged at an angle to the tilting direction of the second guide arc portion.

[0107] According to one embodiment of the present disclosure, the moving contact has a top surface and a side surface, the top surface facing the stationary contact;

[0108] The guide arc structure is chamfered, and the chamfer connects the top surface and the side surface.

[0109] According to one embodiment of this disclosure, the chamfer is a C-shaped chamfer or an R-shaped chamfer.

[0110] According to one embodiment of this disclosure, two of the conductive elements have contact portions at positions close to each other, and the movable contact element is used to contact or separate from the contact portions.

[0111] According to one embodiment of the present disclosure, the conductive member further has a first arc-guiding portion arranged at an angle relative to the moving contact member, the first arc-guiding portion extending toward the moving contact member and configured to guide the flow of electric arc generated by the moving contact member and the contact portion during contact separation.

[0112] According to one embodiment of this disclosure, the conductive member further includes a connecting portion, the connecting portion being connected to the stationary component, one end of the first arc-guided portion being connected to the connecting portion, and the other end of the first arc-guided portion being connected to the contact portion.

[0113] According to one embodiment of the present disclosure, 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 mounted on the top of the insulating cover.

[0114] 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.

[0115] According to one embodiment of this disclosure, 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.

[0116] According to one embodiment of the present disclosure, the stationary component has an insertion portion that extends into the contact cavity, and the shortest distance between the two insertion portions is L5;

[0117] The shortest distance between the two contact points is L3, and L5 > L3.

[0118] According to one embodiment of this disclosure, the relay further includes:

[0119] 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.

[0120] According to one embodiment of this disclosure, the arc extinguishing assembly includes an arc extinguishing grid assembly located on the side of the stationary contact member facing the moving contact member.

[0121] According to one embodiment of the present disclosure, 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.

[0122] The arc-extinguishing grid assembly is located on the side of the stationary contact member facing the yoke plate.

[0123] According to one embodiment of the present disclosure, 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;

[0124] 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.

[0125] According to one embodiment of this disclosure, the corresponding arc-extinguishing grid assembly and the stationary component have an overlapping portion in their orthographic projections on a target plane, and the target plane is perpendicular to the contact separation direction of the moving contact and the stationary contact.

[0126] According to one embodiment of the present disclosure, 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;

[0127] 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.

[0128] According to one embodiment of this disclosure, the static contact further includes a conductive element, the conductive element comprising 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.

[0129] According to one embodiment of this disclosure, all of the static contacts are located on the same side of the dynamic contacts.

[0130] According to one embodiment of this disclosure, the arc-guiding structure is located on the side of the conductive element facing the moving contact.

[0131] According to one embodiment of this disclosure, 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.

[0132] The beneficial effects of this disclosure are as follows:

[0133] The relay of this disclosure, 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, the arc-guiding structure allows the arc to 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] Example 2:

[0142] As shown in Figures 5 and 6, the relay of Embodiment 2 of this disclosure includes a contact cavity 100a, at least one set of contact components 200a, a push rod member 600a, and an arc-extinguishing component 300a. The contact cavity 100a has a contact chamber 101a. Each set of contact components 200a includes a moving contact member 220a and two stationary contacts 210a. The stationary contacts 210a are fixedly mounted on the contact cavity 100a, and the moving contacts 220a are movably disposed within the contact chamber 101a for contacting or separating from the two stationary contacts 210a. The push rod member 600a is movable relative to the contact cavity 100a, and a portion of the push rod member 600a is located within the contact chamber 101a. The moving contact member 220a is installed in the portion of the push rod member 600a located within the contact chamber 101a. The arc extinguishing assembly 300a is located in the contact chamber 101a and is used to extinguish the arc generated by the moving contact 220a and the stationary contact 210a during contact and separation.

[0143] In one embodiment, as shown in FIG6, all of the stationary contact 210a are located on the same side of the moving contact 220a.

[0144] As an example, the contact cavity 100a includes an insulating cover 110a and a yoke plate 130a. The insulating cover 110a covers one side of the yoke plate 130a in the thickness direction, and the insulating cover 110a and the yoke plate 130a form a contact cavity 101a. The static contact member 210a is fixedly mounted on the insulating cover 110a.

[0145] In one embodiment, as shown in FIG6, the insulating cover 110a includes a ceramic cover 111a and a frame 112a. The ceramic cover 111a is made of ceramic material and is connected to the yoke plate 130a via the frame 112a. A static contact 210a is mounted on the top of the ceramic cover 111a.

[0146] As an example, the frame piece 112a can be a ring-shaped metal component, such as one made of an iron-nickel alloy. One end of the frame piece 112a is connected to the opening edge of the ceramic cover 111a, and the other end is connected to the yoke plate 130a. The frame piece 112a is positioned between the ceramic cover 111a and the yoke plate 130a to facilitate their connection.

[0147] The number of contact components 200a can be one or more groups. When the number of contact components 200a is more than one group, it can be two, three, four or other groups.

[0148] As shown in Figures 5 and 6, the following explanation will take two sets of contact components 200a as an example. For ease of explanation, the arrangement direction of the two stationary contact members 210a in one set of contact components 200a is defined as the first direction D1, the movement direction of the push rod member 600a 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 the second embodiment of this disclosure, the contact separation direction between the moving contact member 220a and the stationary contact member 210a is the second direction D2.

[0149] Two sets of contact components 200a are arranged along the third direction D3. The positions of the two stationary contacts 210a of one set of contact components 200a correspond to the positions of the two stationary contacts 210a of the other set of contact components 200a.

[0150] As shown in Figures 6 and 7, the stationary contact 210a has a stationary component 211a, which is mounted on the top of the ceramic cover 111a. The portion of the stationary component 211a extending beyond the outer surface of the contact cavity 100a is called the exposed portion 211-2a. The shortest distance between the two exposed portions 211-2a is L1. The stationary contact 210a also has a contact portion 215a located within the contact cavity 101a. The moving contact 220a of a set of contact assemblies 200a is used to contact or separate from the contact portions 215a of the two stationary contact components 210a of the contact assembly 200a. The shortest distance between the contact portions 215a of the two stationary contact components 210a is L3, where L3 ≤ L1.

[0151] In the second embodiment of this disclosure, since L3≤L1, while ensuring that the distance between the two contact parts 215a remains unchanged, the distance between the two stationary parts 211a 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 211a.

[0152] The relay in Embodiment 2 of this disclosure further includes an arc-guiding structure 240a, which is disposed on the moving contact 220a and configured to guide the current flow generated during the contact separation process between the moving contact 220a and the stationary contact 210a. Furthermore, the arc-guiding structure 240a can guide the arc flow to the arc-extinguishing assembly 300a.

[0153] Please refer to Figure 6. Each stationary contact 210a also includes a conductive element 212a. In the contact assembly 200a, the conductive elements 212a of the two stationary contacts 210a are respectively connected to the stationary parts 211a of the two stationary contacts 210a. The conductive elements 212a are used to contact or separate from the moving contact 220a. The two conductive elements 212a have contact portions 215a at positions close to each other.

[0154] In one embodiment, the two conductive elements 212a extend in a direction that approaches each other.

[0155] It should be noted that "the direction of mutual approach" refers to the overall tendency of the two conductive components 212a to approach each other, which may include, but is not limited to: the two conductive components 212a approaching each other along a straight line, the two conductive components 212a approaching each other along a curve, and a part of the two conductive components 212a approaching each other, etc.

[0156] The relay of Embodiment 2 of this disclosure, by providing an arc-guiding structure 240a on the moving contact 220a, allows the electric arc generated between the moving contact 220a and the stationary contact 210a to flow along the arc-guiding structure 240a, 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 arc-guiding structure 240a, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the arc-guiding structure 240a, 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.

[0157] Among them, the phenomenon of "pointing out" 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.

[0158] In one embodiment, the arc guiding structure 240a is located on the side of the conductive member 212a facing the moving contact member 220a.

[0159] In the second embodiment of this disclosure, since the two conductive elements 212a extend in a direction that approaches each other, and the arc-guided structure 240a is disposed on the side of the conductive element 212a facing the moving contact element 220a, the arrangement in the contact cavity 100a is more compact, which is beneficial to the miniaturization design of the product.

[0160] In one embodiment, the arc-guided structure 240a and the conductive element 212a 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 element 220a and the stationary contact element 210a.

[0161] In one embodiment, the conductive member 212a is flat, and one end of the two conductive members 212a is connected to two stationary members 211a respectively. Starting from the corresponding stationary member 211a, they extend along the first direction D1 and toward each other.

[0162] The arc guiding structure 240a is a second arc guiding part 230a, which can be a long strip-shaped plate structure. The second arc guiding part 230a is connected to the moving contact 220a and is arranged at an angle relative to the moving contact 220a. The second arc guiding part 230a is configured to guide the arc flow to the arc extinguishing grid assembly 310a.

[0163] In the second embodiment of this disclosure, by providing a second arc-guiding portion 230a, the electric arc generated between the moving contact 220a and the stationary contact 210a can flow along the extension direction of the second arc-guiding portion 230a, 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 230a, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the second arc-guiding portion 230a, 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.

[0164] As shown in Figure 6, the stationary contact 210a has a receiving space 102 on the side facing the moving contact 220a, and the second arc guide portion 230a and the automatic contact 220a extend obliquely in a direction close to the receiving space 102 and away from the stationary contact 210a. In the second embodiment of this disclosure, the receiving space 102 is used to arrange the arc extinguishing grid assembly 310a.

[0165] In one embodiment, the second guide arc portion 230a is integrally connected with the moving contact member 220a.

[0166] Of course, in other embodiments, the second guide arc portion 230a and the moving contact member 220a can also be connected separately, for example by riveting, welding, interference fit, etc.

[0167] In one embodiment, the second guide arc portion 230a and the stationary contact member 210a have an overlapping area on a target plane; the target plane is perpendicular to the contact separation direction of the moving contact member 220a and the stationary contact member 210a.

[0168] As shown in Figure 16, the second arc guide portion 230a and the automatic contact member 220a extend in a direction away from the center line of the push rod member 600a and close to the yoke plate 130a. One end of the second arc guide portion 230a is connected to the moving contact member 220a, and the other end of the second arc guide portion 230a is close to the end of the arc extinguishing grid assembly 310a that is close to the yoke plate 130a.

[0169] As an example, there may be two second arc guide portions 230a, which are respectively connected to the two ends of the moving contact member 220a in the length direction, and both second arc guide portions 230a and moving contact member 220a are located between a pair of arc extinguishing grid assemblies 310a.

[0170] Please continue referring to Figure 6. The arc-extinguishing component 300a is located on the side of the stationary contact 210a facing the moving contact 220a. In Embodiment 2 of this disclosure, the arc-extinguishing component 300a is located on the side of the stationary contact 210a facing the yoke plate 130a.

[0171] In the relay of Embodiment 2 of this disclosure, the arc-extinguishing component 300a is arranged on the side of the stationary contact 210a facing the moving contact 220a, so as to make full use of the space on the side of the stationary contact 210a facing the moving contact 220a, without occupying too much space of the relay along the arrangement direction of the two stationary contacts 210a. This ensures the arc-extinguishing effect of the arc-extinguishing component 300a, and avoids making the relay too large, which is conducive to the miniaturization design of the product.

[0172] As shown in Figure 8, the arc-extinguishing assembly 300a includes an isolation seat 320a and at least one pair of arc-extinguishing grid assemblies 310a. The isolation seat 320a is disposed within the contact chamber 101a, for example, the isolation seat 320a is fixedly connected to the yoke plate 130a, and the arc-extinguishing grid assemblies 310a are mounted on the isolation seat 320a. The two paired arc-extinguishing grid assemblies 310a are respectively located on the side of the two stationary contacts 210a of the contact assembly 200a facing the yoke plate 130a, and are used to extinguish the arc generated by the moving contact 220a and the two stationary contacts 210a. The arc-guiding structure 240a can guide the arc flow to the arc-extinguishing grid assemblies 310a.

[0173] In the second embodiment of this disclosure, the two paired arc-extinguishing grid assemblies 310a are respectively located on the side of the stationary part 211a of the two stationary contacts 210a of the contact assembly 200a facing the yoke plate 130a.

[0174] In one embodiment, the number of arc-extinguishing grid assemblies 310a is the same as the number of stationary contacts 210a. For example, the number of both arc-extinguishing grid assemblies 310a and stationary contacts 210a is four, but this is not a limitation.

[0175] Of course, in other embodiments, when the number of static contacts 210a is four, the number of arc extinguishing grid components 310a included in the arc extinguishing assembly 300a can also be two. The two arc extinguishing grid components 310a are arranged along the first direction D1, and each arc extinguishing grid component 310a has a larger size along the third direction D3 so as to cover multiple moving contacts 220a.

[0176] As shown in Figure 6, the two paired arc-extinguishing grid assemblies 310a are located at both ends of the length direction (first direction D1) of the moving contact 220a. The corresponding arc-extinguishing grid assembly 310a and the stationary part 211a of the stationary contact 210a overlap in their orthographic projections on a target plane. The target plane is perpendicular to the contact separation direction (second direction D2) of the moving contact 220a and the stationary contact 210a.

[0177] In the second embodiment of this disclosure, in the contact separation direction of the moving contact 220a and the stationary contact 210a, the arc-extinguishing grid assembly 310a and the stationary contact 211a have an overlapping portion, and the two paired arc-extinguishing grid assemblies 310a are respectively located at both ends of the length direction of the moving contact 220a, so that the arc-extinguishing grid assembly 310a is as close as possible to the contact position of the moving contact 220a and the stationary contact 210a. Therefore, when an electric arc is generated between the moving contact 220a and the stationary contact 210a, the electric arc can enter the arc-extinguishing grid assembly 310a with the shortest path, thereby accelerating the arc extinguishing speed.

[0178] In one embodiment, the conductive component 212a and the stationary component 211a are connected separately, for example by welding, riveting, interference fit, or other methods.

[0179] Of course, in other embodiments, the conductive element 212a and the stationary element 211a can also be integrally connected, that is, the stationary contact element 210a is a single piece.

[0180] In one embodiment, the conductive element 212a can be connected to the bottom of the stationary element 211a or to the side of the stationary element 211a. Of course, the conductive element 212a can also be connected to both the bottom and the side of the stationary element 211a at the same time. This disclosure does not limit this.

[0181] Please refer back to Figure 6. The shortest distance between the two exposed parts 211-2a is L1, and the shortest distance between the two paired arc-extinguishing grid components 310a is L2, where L2≤L1.

[0182] In the second embodiment of this disclosure, since L2≤L1, the arc extinguishing grid assembly 310a is brought closer to the moving contact 220a to accelerate the arc extinguishing speed.

[0183] As shown in Figure 6, in one embodiment, the portion of the stationary component 211a that extends into the contact cavity 100a is the insertion portion 211-1a. The farthest distance between the insertion portions 211-1a of the two stationary components 211a is L4, and the shortest distance between the two paired arc-extinguishing grid assemblies 310a is L2, where L4 > L2.

[0184] In the second embodiment of this disclosure, since L4 > L2, the arc extinguishing grid assembly 310a can be arranged below the insertion part 211-1a to improve the space utilization rate within the contact cavity 100a, which is beneficial for product miniaturization design.

[0185] The conductive element 212a can be connected to the insertion part 211-1a.

[0186] As shown in Figure 6, in one embodiment, the shortest distance between the two insertion parts 211-1a is L5, where L5 > L3.

[0187] In the second embodiment of this disclosure, since L5 > L3, the two conductive elements 212a extend in a direction that is generally close to each other, and sufficient space is reserved between the two insertion portions 211-1a. This space can accommodate other components, improve the space utilization rate within the contact cavity 100a, and facilitate the miniaturization design of the product.

[0188] In one implementation, L1 < L5.

[0189] As shown in Figures 8 and 9, the arc extinguishing grid assembly 310a includes a mounting member 311a and a plurality of grid plates 312a. The plurality of grid plates 312a are mounted on the mounting member 311a and arranged along the contact separation direction (second direction D2) between the moving contact member 220a and the stationary contact member 210a. There is a gap between two adjacent grid plates 312a.

[0190] As shown in Figures 9 and 10, in one embodiment, the mounting member 311a includes two oppositely arranged mounting plates 3111a, and a plurality of grid plates 312a are mounted between the two mounting plates 3111a.

[0191] As shown in Figures 10 and 11, in one embodiment, the mounting plate 3111a and the grid plate 312a have a locking hole 313a on one of them and a locking part 314a on the other, the locking part 314a being engaged into the locking hole 313a.

[0192] For example, the mounting plate 3111a has a snap hole 313a and the grid plate 312a has a snap-fit ​​portion 314a; or, the mounting plate 3111a has a snap-fit ​​portion 314a and the grid plate 312a has a snap hole 313a.

[0193] It should be noted that the connection between the grid plate 312a and the mounting piece 311a is not limited to a snap-fit ​​method. For example, multiple slots can be provided on the mounting piece 311a, and the grid plate 312a can be inserted into the slots.

[0194] Example 3:

[0195] As shown in Figures 12 and 13, the similarities between the relay of Embodiment 3 and the relay of Embodiment 2 of this disclosure will not be repeated here. The differences are as follows:

[0196] The moving contact 220a has a top surface 221a and a side surface 222a, with the top surface 221a facing the stationary contact 210a; the guide arc structure 240a is a chamfer 241a, which connects the top surface 221a and the side surface 222a.

[0197] The moving contact 220a may have chamfers 241a at both ends along its length, or it may have chamfers 241a at only one end along its length.

[0198] As an example, the chamfer 241a can be formed on the moving contact 220a by machining, for example, by a milling machine, lathe, chamfering machine, etc. Of course, it can also be machined by hand tools such as files and sandpaper.

[0199] In one embodiment, chamfer 241a is a C-shaped chamfer.

[0200] Example 4:

[0201] As shown in Figures 14 and 15, the similarities between the relay of Embodiment 4 and the relay of Embodiment 2 of this disclosure will not be repeated here. The differences are as follows:

[0202] Chamfer 241a is an R chamfer.

[0203] Example 5:

[0204] As shown in Figures 16 and 17, the similarities between the relay of Embodiment 5 and the relay of Embodiment 4 of this disclosure will not be repeated here. The differences are as follows:

[0205] The stationary contact 210a includes a first arc guide portion 214a arranged at an angle relative to the moving contact 220a. The first arc guide portion 214a extends toward the moving contact 220a and is configured to guide the flow of the electric arc generated during the contact separation process between the moving contact 220a and the stationary contact 210a, so as to flow toward the arc extinguishing assembly 300a.

[0206] In Embodiment 5 of this disclosure, by providing a first arc-guiding portion 214a, the electric arc generated between the moving contact 220a and the stationary contact 210a can flow along the extension direction of the first arc-guiding portion 214a, 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 aid of the first arc-guiding portion 214a, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion 214a, 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.

[0207] Therefore, in Embodiment 5 of this disclosure, the conductive member 212a has an inclined first arc-guiding portion 214a, which extends from the connecting portion 213a toward the moving contact member 220a. At the same time, the end of the conductive member 212a away from the stationary member 211a has a contact portion 215a. The arrangement of the conductive member 212a not only ensures the distance between the two stationary members 211a to provide a sufficiently long electrical distance and for arranging other components, but also the first arc-guiding portion 214a of the conductive member 212a can guide the electric arc so that the electric arc flows to the arc-extinguishing assembly 300a in a timely manner. Meanwhile, the conductive member 212a has reserved space on the side toward the moving contact member 220a, which can be used to arrange other components, improving the space utilization of the relay and facilitating the miniaturization design of the product.

[0208] The first guide arc portion 214a can extend along a straight line or along a curve, and this disclosure does not limit it in this way.

[0209] In one embodiment, the conductive element 212a has a first arc-guiding portion 214a and a contact portion 215a.

[0210] As shown in Figures 16 and 17, the conductive member 212a further includes a connecting portion 213a, which is connected to the stationary member 211a. One end of the first arc-shaped portion 214a is connected to the connecting portion 213a, and the other end of the first arc-shaped portion 214a is connected to the contact portion 215a. The moving contact member 220a is used to contact or separate from the contact portion 215a. The first arc-shaped portion 214a extends from the connecting portion 213a toward the center line of the push rod member 600a and the yoke plate 130a.

[0211] As shown in Figure 16, the tilt direction of the first guide arc portion 214a is arranged at an angle to the tilt direction of the second guide arc portion 230a. This angle can be an acute angle or an obtuse angle.

[0212] In the fifth embodiment of this disclosure, the first arc guiding portion 214a and the second arc guiding portion 230a form a flared structure, which helps to confine the arc between the first arc guiding portion 214a and the second arc guiding portion 230a, thereby accelerating the arc flow to the arc extinguishing component 300a and shortening the arc extinguishing time.

[0213] Of course, the first guide arc portion 214a of Embodiment 5 of this disclosure can also be combined with the chamfer 241a of Embodiments 2 and 3 of this disclosure.

[0214] Example 6:

[0215] As shown in Figure 18, the similarities between the relay of Embodiment Six and the relay of Embodiment Five of this disclosure will not be repeated here. The differences are as follows:

[0216] The conductive element 212a includes a first segment 212a1 and a second segment 212a2 that are vertically connected. The first segment 212a1 is connected to the stationary component 211a, and the second segment 212a2 has a contact portion 215a at the end away from the first segment 212a1.

[0217] In summary, the relay of Embodiment Six of this disclosure has at least the following advantages and beneficial effects:

[0218] The relay of Embodiment Six of this disclosure, by providing an arc-guiding structure 240a on the moving contact 220a, allows the electric arc generated between the moving contact 220a and the stationary contact 210a to flow along the arc-guiding structure 240a, 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 arc-guiding structure 240a, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the arc-guiding structure 240a, 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.

[0219] Furthermore, since the two conductive elements 212a extend in a direction that approaches each other, and the arc-guided structure 240a is disposed on the side of the conductive element 212a facing the moving contact element 220a, the arrangement within the contact cavity 100a is more compact, which is beneficial for product miniaturization design.

[0220] Furthermore, since L3≤L1, while ensuring that the distance between the two contact parts 215a remains unchanged, the distance between the two exposed parts 211-2a 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 211a.

[0221] Furthermore, the arc-extinguishing component 300a is arranged on the side of the stationary contact 210a facing the yoke plate 130a, so as to make full use of the space between the stationary contact 210a and the yoke plate 130a, without occupying too much space of the relay along the arrangement direction of the two stationary contacts 210a. This ensures the arc-extinguishing effect of the arc-extinguishing component 300a, while avoiding making the relay too large, which is conducive to the miniaturization design of the product.

[0222] Furthermore, in the contact separation direction of the moving contact 220a and the stationary contact 210a, the arc-extinguishing grid assembly 310a overlaps with the stationary contact 210a, and the two paired arc-extinguishing grid assemblies 310a are located at opposite ends of the length direction of the moving contact 220a, so that the arc-extinguishing grid assembly 310a is as close as possible to the contact position between the moving contact 220a and the stationary contact 210a. As a result, when an electric arc is generated between the moving contact 220a and the stationary contact 210a, the arc can enter the arc-extinguishing grid assembly 310a with the shortest path, thus accelerating the arc extinguishing speed.

[0223] Furthermore, the shortest distance between the two exposed portions 211-2a is L1, and the shortest distance between the two paired arc-extinguishing grid assemblies 310a is L2. Since L2≤L1, the arc-extinguishing grid assembly 310a is closer to the moving contact 220a to accelerate the arc extinguishing speed.

[0224] Furthermore, the stationary contact 210a is provided with a first arc-guiding portion 214a, allowing the electric arc generated between the moving contact 220a and the stationary contact 210a to flow along the extension direction of the first arc-guiding portion 214a. This elongates the arc, shortens the arc extinguishing time, prevents the arc from burning the moving and stationary contacts for an extended period, and improves the electrical durability of the moving and stationary contacts. In addition, the first arc-guiding portion 214a 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 214a, thereby reducing the wear on 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.

[0225] Furthermore, the first arc guiding portion 214a and the second arc guiding portion 230a form a flared structure, which helps to confine the arc between the first arc guiding portion 214a and the second arc guiding portion 230a, thereby accelerating the arc flow to the arc extinguishing component 300a and shortening the arc extinguishing time.

[0226] This disclosure also provides a relay to further shorten the arc extinguishing time.

[0227] According to another aspect of this disclosure, the relay includes: a contact cavity having a contact chamber; and

[0228] 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;

[0229] 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.

[0230] According to one embodiment of the present disclosure, 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 arc flow.

[0231] According to one embodiment of the present disclosure, 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.

[0232] According to one embodiment of this disclosure, 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.

[0233] According to one embodiment of the present disclosure, 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.

[0234] 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.

[0235] According to one embodiment of this disclosure, 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.

[0236] According to one embodiment of this disclosure, 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.

[0237] According to one embodiment of the present disclosure, the tilting direction of the first guide arc portion is arranged at an angle to the tilting direction of the second guide arc portion.

[0238] According to one embodiment of this disclosure, all of the static contacts are located on the same side of the dynamic contacts.

[0239] According to one embodiment of the present disclosure, 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.

[0240] According to one embodiment of the present disclosure, 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.

[0241] According to one embodiment of the present disclosure, 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 mounted on the top of the insulating cover.

[0242] 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.

[0243] According to one embodiment of this disclosure, 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'.

[0244] According to one embodiment of the present disclosure, the stationary component has an insertion portion that extends into the contact cavity, and the shortest distance between two insertion portions is L5';

[0245] The conductive element has contact portions for contacting or separating from the moving contact, and the shortest distance between two contact portions is L3', where L5' > L3'.

[0246] According to one embodiment of this disclosure, the relay further includes:

[0247] 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.

[0248] The first arc-guiding part is configured to guide the arc flow to the arc-extinguishing component.

[0249] According to one embodiment of the present disclosure, 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 length direction.

[0250] According to one embodiment of this disclosure, 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.

[0251] 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'.

[0252] According to one embodiment of the present disclosure, the stationary contact includes a stationary component mounted on the contact cavity, the stationary component having an insertion portion extending into the contact cavity, the farthest distance between the insertion portions of two stationary components being L4', and the shortest distance between a pair of arc-extinguishing grid assemblies being L2', where L4' > L2'.

[0253] According to one embodiment of the present disclosure, 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.

[0254] One embodiment disclosed above has at least the following advantages or beneficial effects:

[0255] The relay of this embodiment, by providing a first arc-guiding portion, allows 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. Furthermore, the first arc-guiding portion allows the arc to transfer 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.

[0256] 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 guide the arc, but also maximizes the distance between the two exposed parts 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.

[0257] 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.

[0258] 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.

[0259] 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.

[0260] 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.

[0261] 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.

[0262] Example 7:

[0263] As shown in Figures 19 and 20, the relay of Embodiment 7 of this disclosure includes a contact cavity 100b, at least one set of contact components 200b, a push rod member 600b, and an arc-extinguishing component 300b. The contact cavity 100b has a contact chamber 101b. Each set of contact components 200b includes a moving contact 220b and two stationary contacts 210b. The stationary contacts 210b are fixedly disposed relative to the contact cavity 100b, for example, the stationary contacts 210b are fixedly mounted on the contact cavity 100b. The moving contact 220b is movably disposed within the contact chamber 101b for contacting or separating from the two stationary contacts 210b. The push rod member 600b is movable relative to the contact cavity 100b, and a portion of the push rod member 600b is located within the contact chamber 101b. The moving contact 220b is disposed within the portion of the push rod member 600b located within the contact chamber 101b. The arc extinguishing assembly 300b is located in the contact chamber 101b and is used to extinguish the arc generated by the moving contact 220b and the stationary contact 210b during contact and separation.

[0264] In one embodiment, all of the stationary contact 210b are located on the same side of the moving contact 220b.

[0265] As an example, the contact cavity 100b includes an insulating cover 110b and a yoke plate 130b. The insulating cover 110b covers one side of the yoke plate 130b in the thickness direction, and the insulating cover 110b and the yoke plate 130b form a contact cavity 101b. A static contact 210b is fixedly mounted on the insulating cover 110b.

[0266] In one embodiment, the insulating cover 110b includes a ceramic cover 111b and a frame 112b. The ceramic cover 111b is made of ceramic material and is connected to the yoke plate 130b via the frame 112b. A static contact 210b is mounted on the top of the ceramic cover 111b.

[0267] As an example, the frame piece 112b can be a ring-shaped metal component, such as one made of an iron-nickel alloy. One end of the frame piece 112b is connected to the opening edge of the ceramic cover 111b, and the other end is connected to the yoke plate 130b. The frame piece 112b is positioned between the ceramic cover 111b and the yoke plate 130b to facilitate their connection.

[0268] The number of contact components 200b can be one or more groups. When the number of contact components 200b is more than one group, it can be two, three, four or other groups.

[0269] As shown in Figures 19 and 20, the following explanation will take two sets of contact components 200b as an example. For ease of explanation, the arrangement direction of the two stationary contact members 210b in one set of contact components 200b is defined as the first direction D1, the movement direction of the push rod member 600b 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 Embodiment 7 of this disclosure, the contact separation direction between the moving contact member 220b and the stationary contact member 210b is the second direction D2.

[0270] Two sets of contact components 200b are arranged along the third direction D3. The positions of the two stationary contacts 210b of one set of contact components 200b correspond to the positions of the two stationary contacts 210b of the other set of contact components 200b.

[0271] As shown in Figure 20, the stationary contact 210b includes a first arc guide portion 214b arranged at an angle relative to the moving contact 220b. The first arc guide portion 214b extends toward the moving contact 220b and is configured to guide the flow of the electric arc generated during the contact separation process between the moving contact 220b and the stationary contact 210b, so as to flow toward the arc extinguishing assembly 300b.

[0272] In Embodiment Seven of this disclosure, by providing a first arc-guiding portion 214b, the electric arc generated between the moving contact 220b and the stationary contact 210b can flow along the extension direction of the first arc-guiding portion 214b, 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 aid of the first arc-guiding portion 214b, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion 214b, 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.

[0273] Among them, the phenomenon of "pointing out" 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.

[0274] The first guide arc portion 214b can extend along a straight line or along a curve, and this disclosure does not limit it in this way.

[0275] As shown in Figures 20 and 21, each stationary contact 210b includes a stationary component 211b and a conductive component 212b. The stationary component 211b is mounted on top of the ceramic cover 111b. In the contact assembly 200b, the conductive components 212b of the two stationary contacts 210b are respectively connected to the stationary components 211b of the two stationary contacts 210b. The conductive components 212b are used to contact or separate from the moving contact 220b. The conductive component 212b has a first arc-shaped portion 214b.

[0276] The conductive element 212b also includes a connecting portion 213b and a contact portion 215b. The contact portion 215b has a stationary contact. The connecting portion 213b is connected to the stationary component 211b. One end of the first arc-shaped portion 214b is connected to the connecting portion 213b, and the other end of the first arc-shaped portion 214b is connected to the contact portion 215b. The moving contact 220b is used to contact or separate from the contact portion 215b. The first arc-shaped portion 214b extends from the connecting portion 213b toward the center line of the push rod component 600b and the yoke plate 130b.

[0277] As shown in Figure 20, the portion of the stationary component 211b that extends out of the outer surface of the contact cavity 100b is the exposed portion 211-2b, the shortest distance between the two exposed portions 211-2b is L1', and the shortest distance between the two contact portions 215b included in the contact assembly 200b is L3', where L3'≤L1'.

[0278] In Embodiment Seven of this disclosure, by providing a conductive element 212b, and having a contact portion 215b on the conductive element 212b, since L3'≤L1', the two conductive elements 212b extend approximately in a direction close to each other. This not only allows for arc guiding using the first arc guiding portion 214b, but also maximizes the distance between the two exposed portions 211-2b while ensuring that the distance between the contact portions 215b of the two conductive elements 212b remains constant. Thus, while ensuring electrical distance, other components, such as auxiliary monitoring contacts or exciters, can be arranged in the space between the two stationary components 211b. As shown in Figure 20, the arc extinguishing assembly 300b is located on the side of the stationary contact 210b facing the moving contact 220b.

[0279] The relay of Embodiment 7 of this disclosure arranges the arc-extinguishing component 300b on the side of the stationary contact 210b facing the moving contact 220b, so as to make full use of the space on the side of the stationary contact 210b facing the moving contact 220b, without occupying too much space of the relay along the arrangement direction of the two stationary contacts 210b. This ensures the arc-extinguishing effect of the arc-extinguishing component 300b, and avoids making the relay too large, which is conducive to the miniaturization design of the product.

[0280] As shown in Figure 22, the arc-extinguishing assembly 300b includes an isolation seat 320b and at least one pair of arc-extinguishing grid assemblies 310b. The isolation seat 320b is disposed within the contact chamber 101b, for example, the isolation seat 320b is fixedly connected to the yoke plate 130b, and the arc-extinguishing grid assemblies 310b are mounted on the isolation seat 320b. The two paired arc-extinguishing grid assemblies 310b are respectively located on the side of the two stationary contacts 210b of the contact assembly 200b facing the yoke plate 130b, and are used to extinguish the arc generated by the moving contact 220b and the two stationary contacts 210b.

[0281] In Embodiment Seven of this disclosure, the paired arc-extinguishing grid assemblies 310b are respectively located on the side of the stationary portion 211b of the two stationary contacts 210b of the contact assembly 200b facing the yoke plate 130b. Further, the paired arc-extinguishing grid assemblies 310b are respectively located on the side of the connecting portion 213b of the two stationary contacts 210b of the contact assembly 200b facing the yoke plate 130b.

[0282] In one embodiment, the number of arc-extinguishing grid assemblies 310b is the same as the number of stationary contacts 210b. For example, the number of both arc-extinguishing grid assemblies 310b and stationary contacts 210b is four, but this is not a limitation.

[0283] Of course, in other embodiments, when the number of static contacts 210b is four, the number of arc extinguishing grid components 310b included in the arc extinguishing assembly 300b can also be two. The two arc extinguishing grid components 310b are arranged along the first direction D1, and each arc extinguishing grid component 310b has a larger size along the third direction D3 so as to cover multiple moving contacts 220b.

[0284] As shown in Figure 20, the two paired arc-extinguishing grid assemblies 310b are located at both ends of the length direction (first direction D1) of the moving contact 220b. The corresponding arc-extinguishing grid assembly 310b and the stationary part 211b of the stationary contact 210b have an overlapping portion on a target plane. The target plane is perpendicular to the contact separation direction (second direction D2) of the moving contact 220b and the stationary contact 210b.

[0285] In Embodiment 7 of this disclosure, in the contact separation direction of the moving contact 220b and the stationary contact 210b, the arc-extinguishing grid assembly 310b and the stationary component 211b have an overlapping portion, and the two paired arc-extinguishing grid assemblies 310b are respectively located at both ends of the length direction of the moving contact 220b, so that the arc-extinguishing grid assembly 310b is as close as possible to the contact position of the moving contact 220b and the stationary contact 210b. Therefore, when an electric arc is generated between the moving contact 220b and the stationary contact 210b, the electric arc can enter the arc-extinguishing grid assembly 310b with the shortest path, thereby accelerating the arc extinguishing speed.

[0286] In one embodiment, the conductive component 212b and the stationary component 211b are connected separately, for example by welding, riveting, interference fit, or other methods.

[0287] Of course, in other embodiments, the conductive element 212b and the stationary element 211b can also be integrally connected, that is, the stationary contact element 210b is a single piece.

[0288] In one embodiment, the conductive element 212b can be connected to the bottom of the stationary element 211b or to the side of the stationary element 211b. Of course, the conductive element 212b can also be connected to both the bottom and the side of the stationary element 211b at the same time. This disclosure does not limit this.

[0289] When the conductive element 212b is connected to the bottom of the stationary element 211b, the connecting portion 213b of the conductive element 212b can be located between the arc-extinguishing grid assembly 310b and the stationary element 211b.

[0290] As shown in Figure 20, the shortest distance between the two exposed parts 211-2b is L1', and the shortest distance between the two paired arc-extinguishing grid components 310b is L2', where L2'≤L1'.

[0291] In Embodiment Seven of this disclosure, since L2'≤L1', the arc extinguishing grid assembly 310b is brought closer to the moving contact 220b to accelerate the arc extinguishing speed.

[0292] Please refer to Figure 20. In one embodiment, the portion of the stationary component 211b that extends into the contact cavity 100b is the insertion portion 211-1b. The farthest distance between the insertion portions 211-1b of the two stationary components 211b is L4', and the shortest distance between the two paired arc-extinguishing grid assemblies 310b is L2', where L4' > L2'.

[0293] In Embodiment 7 of this disclosure, since L4' > L2', the arc-extinguishing grid assembly 310b can be arranged below the insertion portion 211-1b to improve the space utilization rate within the contact cavity 100b, which is beneficial for product miniaturization design.

[0294] The connecting portion 213b of the conductive element 212b can be connected to the insertion portion 211-1b.

[0295] As shown in Figure 20, in one embodiment, the shortest distance between the two insertion portions 211-1b is L5', where L5' > L3'.

[0296] In Embodiment 7 of this disclosure, since L5' > L3', the two conductive elements 212b extend in a direction that is generally close to each other, and sufficient space is reserved between the two insertion portions 211-1b. This space can accommodate other components, improve the space utilization rate within the contact cavity 100b, and facilitate the miniaturization design of the product.

[0297] In one implementation, L1' < L5'.

[0298] As shown in Figures 22 and 23, the arc extinguishing grid assembly 310b includes a mounting member 311b and a plurality of grid plates 312b. The plurality of grid plates 312b are mounted on the mounting member 311b and arranged along the contact separation direction (second direction D2) between the moving contact member 220b and the stationary contact member 210b. There is a gap between two adjacent grid plates 312b.

[0299] As shown in Figures 23 and 24, in one embodiment, the mounting member 311b includes two oppositely arranged mounting plates 3111b, and a plurality of grid plates 312b are mounted between the two mounting plates 3111b.

[0300] As shown in Figures 24 and 25, in one embodiment, the mounting plate 3111b and the grid plate 312b each have a locking hole 313b and a locking part 314b, which engages with the locking hole 313b.

[0301] For example, the mounting plate 3111b has a snap-fit ​​hole 313b and the grid plate 312b has a snap-fit ​​portion 314b; or, the mounting plate 3111b has a snap-fit ​​portion 314b and the grid plate 312b has a snap-fit ​​hole 313b.

[0302] It should be noted that the connection between the grid plate 312b and the mounting part 311b is not limited to a snap-fit ​​method. For example, multiple slots can be provided on the mounting part 311b, and the grid plate 312b can be inserted into the slots.

[0303] Therefore, in Embodiment 7 of this disclosure, the conductive member 212b has an inclined first arc-guiding portion 214b, which extends from the connecting portion 213b toward the moving contact member 220b. At the same time, the end of the conductive member 212b away from the stationary member 211b has a contact portion 215b. The arrangement of the conductive member 212b not only ensures the distance between the two stationary members 211b to provide a sufficiently long electrical distance and for arranging other components, but also the first arc-guiding portion 214b of the conductive member 212b can guide the electric arc so that the electric arc flows to the arc-extinguishing assembly 300b in a timely manner. Meanwhile, the conductive member 212b has reserved space on the side toward the moving contact member 220b, which can be used to arrange other components, improving the space utilization of the relay and facilitating the miniaturization design of the product.

[0304] Example 8:

[0305] As shown in Figure 26, the similarities between the relay of Embodiment 8 and the relay of Embodiment 7 of this disclosure will not be repeated here. The differences are as follows:

[0306] The contact assembly 200b also includes a second arc guide portion 230b, which is connected to the moving contact 220b and is arranged at an angle relative to the moving contact 220b. The second arc guide portion 230b is configured to guide the arc flow to the arc extinguishing grid assembly 310b.

[0307] In Embodiment 8 of this disclosure, by providing a second arc-guiding portion 230b, the electric arc generated between the moving contact 220b and the stationary contact 210b can flow along the extension direction of the second arc-guiding portion 230b, 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 230b, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the second arc-guiding portion 230b, 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.

[0308] In one embodiment, the second guide arc portion 230b and the moving contact member 220b are integrally connected.

[0309] Of course, in other embodiments, the second guide arc portion 230b and the moving contact 220b can also be connected separately, for example by riveting, welding, interference fit, etc.

[0310] In one embodiment, the second guide arc portion 230b and the stationary contact member 210b have an overlapping area on a target plane; the target plane is perpendicular to the contact separation direction of the moving contact member 220b and the stationary contact member 210b.

[0311] As shown in Figure 26, the stationary contact 210b has a receiving space 102b on the side facing the moving contact 220b, and the second arc guide portion 230b automatically contacts the 220b, extending obliquely towards the receiving space 102b and away from the stationary contact 210b. In Embodiment 8 of this disclosure, the receiving space 102b is used to arrange the arc extinguishing grid assembly 310b.

[0312] As shown in Figure 26, the second arc guide portion 230b and the automatic contact member 220b extend in a direction away from the center line of the push rod member 600b and close to the yoke plate 130b. One end of the second arc guide portion 230b is connected to the moving contact member 220b, and the other end is close to the end of the arc extinguishing grid assembly 310b that is close to the yoke plate 130b.

[0313] As an example, there may be two second arc guide portions 230b, which are respectively connected to the two ends of the moving contact 220b in the length direction, and both second arc guide portions 230b and moving contact 220b are located between a pair of arc extinguishing grid assemblies 310b.

[0314] As shown in Figure 26, the tilt direction of the first guide arc portion 214b is arranged at an angle to the tilt direction of the second guide arc portion 230b. This angle can be either acute or obtuse.

[0315] In Embodiment 8 of this disclosure, the first arc guiding portion 214b and the second arc guiding portion 230b form a flared structure, which helps to confine the arc between the first arc guiding portion 214b and the second arc guiding portion 230b, thereby accelerating the arc flow to the arc extinguishing component 300b and shortening the arc extinguishing time.

[0316] Referring to Figure 26, the relay of Embodiment 8 of this disclosure further includes an exciter 710b, which is mounted on top of the ceramic cover 111b of the contact cavity 100b. At least a portion of the exciter 710b is located within the contact cavity 101b, and the exciter 710b is located on the side of the moving contact 220b facing away from the yoke plate 130b. The exciter 710b is configured to release an impactor into the contact cavity 101b in response to an excitation signal. The impactor is capable of switching the moving contact 220b from a state of being connected to the stationary contact 210b to a state of being disconnected from the stationary contact 210b.

[0317] In Embodiment 8 of this disclosure, the relay is equipped with an exciter 710b. When an excitation signal occurs, the exciter 710b is activated, thereby releasing an impactor into the contact chamber 101b. The impactor causes the moving contact 220b to switch from a state of conduction with the stationary contact 210b to a state of disconnection with the stationary contact 210b. In this way, the exciter 710b acts as a "fuse," enabling the relay to disconnect promptly when an excitation signal occurs, which helps improve the anti-sticking properties of the moving and stationary contacts and achieves rapid arc extinguishing.

[0318] In one embodiment, an excitation signal is generated when a threshold current passes through the moving contact 220b.

[0319] As an example, the impactor can be a gaseous or solid substance. When the impactor is a gaseous substance, the exciter 710b can release gas into the contact chamber 101b in response to an excitation signal. The gas can impact the contact 220b to disconnect the relay. When the impactor is a solid substance, the exciter 710b can release an object into the contact chamber 101b in response to an excitation signal. This object can impact the contact 220b to disconnect the relay.

[0320] It should be noted that, regardless of whether the impactor is a gaseous or solid substance, the impactor can directly contact the moving contact 220b or indirectly contact the moving contact 220b.

[0321] In one embodiment, when the impactor is a gaseous substance, the igniter 710b may include gunpowder. When the threshold current passes through the moving contact 220b, 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 220b to move, thereby disconnecting the relay.

[0322] For example, the exciter 710b can be an electric detonator or an electric detonating tube, but is not limited to this.

[0323] It should be added that the excitation signal can be determined by whether the current flowing through the moving contact 220b reaches a threshold. Specifically, when the current flowing through the moving contact 220b is greater than or equal to the threshold, the exciter 710b receives an excitation signal; when the current flowing through the moving contact 220b is less than the threshold, the exciter 710b does not receive an excitation signal.

[0324] As an example, the magnitude of the current passing through the moving contact 220b can be monitored by using a Hall effect sensor to monitor the magnetic field strength near the moving contact 220b and the stationary contact 210b. Based on the correspondence between magnetic field strength and current value, the current value can be derived from the magnetic field strength.

[0325] 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 220b in the current loop.

[0326] In summary, the relay of Embodiment 8 of this disclosure has at least the following advantages and beneficial effects:

[0327] The relay of Embodiment 8 of this disclosure, by providing a first arc-guiding portion 214b, allows the electric arc generated between the moving contact 220b and the stationary contact 210b to flow along the extension direction of the first arc-guiding portion 214b. 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 214b 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 214b, 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.

[0328] Furthermore, by providing conductive element 212b with stationary contacts, since L3'≤L1', the two conductive elements 212b extend approximately in a direction close to each other. This not only allows for arc guiding using the first arc guiding portion 214b, but also maximizes the distance between the two exposed portions 211-2b while ensuring that the distance between the stationary contacts of the two conductive elements 212b remains constant. Thus, while ensuring electrical distance, other components, such as auxiliary monitoring contacts and exciters, can be arranged in the space between the two stationary components 211b.

[0329] Furthermore, in the contact separation direction of the moving contact 220b and the stationary contact 210b, the arc-extinguishing grid assembly 310b overlaps with the stationary contact 210b, and the two paired arc-extinguishing grid assemblies 310b are located at opposite ends of the length of the moving contact 220b. This allows the arc-extinguishing grid assembly 310b to be as close as possible to the contact position between the moving contact 220b and the stationary contact 210b. Consequently, when an arc is generated between the moving contact 220b and the stationary contact 210b, the arc can enter the arc-extinguishing grid assembly 310b via the shortest path, thus accelerating the arc extinguishing speed.

[0330] Furthermore, the shortest distance between the two exposed portions 211-2b is L1', and the shortest distance between the two paired arc-extinguishing grid assemblies 310b is L2'. Since L2'≤L1', the arc-extinguishing grid assembly 310b is closer to the moving contact 220b to accelerate the arc extinguishing speed.

[0331] Furthermore, by providing the second arc-guiding portion 230b, the electric arc generated between the moving contact 220b and the stationary contact 210b can flow along the extension direction of the second arc-guiding portion 230b, 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 230b, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the second arc-guiding portion 230b, 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.

[0332] Furthermore, the first arc guiding portion 214b and the second arc guiding portion 230b form a flared structure, which helps to confine the arc between the first arc guiding portion 214b and the second arc guiding portion 230b, thereby accelerating the arc flow to the arc extinguishing component 300b and shortening the arc extinguishing time.

[0333] Furthermore, the relay is equipped with an exciter 710b. When an excitation signal is received, the exciter 710b is activated, thereby releasing an impactor into the contact chamber 101b. The impactor causes the moving contact 220b to switch from a state of conduction with the stationary contact 210b to a state of disconnection with the stationary contact 210b. In this way, the exciter 710b acts as a "fuse," enabling the relay to disconnect promptly upon the arrival of the excitation signal. This improves the anti-sticking properties of the moving and stationary contacts, achieving rapid arc extinguishing.

[0334] It is understood that the various embodiments / implementations provided in this disclosure can be combined with each other without creating contradictions, and will not be described in detail here.

[0335] 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.

[0336] 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.

[0337] 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.

[0338] 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: A pair of stationary contacts are arranged along a first direction; A pair of conductive elements, each having a conductive portion, the conductive portions of the pair of conductive elements being respectively connected to a pair of stationary contacts and extending in a direction away from each other along the first direction, the end of the conductive portion away from the stationary contact being a stationary contact point; as well as A moving contact is used to contact or separate from the stationary contact of the conductive portion of a pair of conductive elements, and the moving contact and the conductive portion have overlapping projections on a target plane. The target plane is perpendicular to the direction of movement of the moving contact.

2. The relay according to claim 1, characterized in that, The conductive element further includes a first arc-shaped portion, which is connected to the end of the conductive element away from the stationary contact element and extends from the conductive element in a direction away from the moving contact element and the stationary contact element.

3. The relay according to claim 2, characterized in that, The first arc-shaped portions of the pair of conductive elements are symmetrically arranged in the first direction.

4. The relay according to claim 2, characterized in that, The first arc-guided portion and the conductive portion are either an integral structure or separate structures.

5. The relay according to any one of claims 1-4, characterized in that, The moving contact includes: The body, with two ends along the first direction for contacting or separating from the stationary contacts of the conductive portions of the pair of conductive elements, respectively; and Two second guide arc portions are respectively connected to the two ends of the body along the first direction, and the second guide arc portions extend from the body in a direction away from the conductive element and the static contact element.

6. The relay according to claim 5, characterized in that, The two second guide arc portions are symmetrically arranged in the first direction.

7. The relay according to claim 5, characterized in that, The second guide arc portion and the main body are either an integral structure or separate structures.

8. The relay according to claim 5, characterized in that, The relay also includes: Two arc-extinguishing grid assemblies are arranged at intervals along the first direction, and the moving contact is located between the two arc-extinguishing grid assemblies. The second arc-guiding portion of the moving contact extends toward the arc-extinguishing grid assembly. The arc-extinguishing grid assembly includes a plurality of arc-extinguishing grid plates, which are arranged at intervals along the movement direction of the moving contact.

9. The relay according to claim 1, characterized in that, The conductive part and the static contact can be an integral structure or separate structures.

10. The relay according to claim 1, characterized in that, The moving contact includes a body, and the two ends of the body along the first direction are used to contact or separate from the stationary contacts of the conductive portions of a pair of conductive elements, respectively. The conductive part is parallel to the body.

11. The relay according to claim 1, characterized in that, The relay also includes an insulating cover made of ceramic material, the insulating cover comprising: The static contact element is mounted on the top wall; A sidewall, connected to the top wall, is located around the moving contact.

12. A relay, characterized in that, include: A pair of stationary contacts; A pair of conductive elements are respectively connected to a pair of the aforementioned static contacts; as well as A moving contact for contacting or separating from a pair of said conductive elements; The moving contact is in contact with a pair of conductive elements, and when current flows through the stationary contact, the conductive elements and the moving contact, the current in the two conductive elements flows in the same direction and in the opposite direction to the current in the moving contact.

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