relay

Abstract

The application discloses a relay, comprising a contact cavity, a contact assembly and an actuator assembly. The contact cavity has a contact chamber; the contact assembly comprises two static contacts and a dynamic contact, the static contacts are fixedly arranged relative to the contact cavity, and the dynamic contact is movably arranged in the contact chamber and used for contacting or separating from the two static contacts; the actuator assembly is connected to an inner wall surface of the contact cavity, and the actuator assembly is configured to release an impact object into the contact chamber in response to an actuation signal, and the impact object can switch the dynamic contact from a conduction state with the static contacts to a disconnection state with the static contacts.

Description

Technical Field

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

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] When an abnormal overload such as overcurrent occurs in the energized circuit, the relay is required to disconnect the circuit, thereby cutting off the overload current and providing safety protection. Depending on the capacity of the power supply, the current can reach kiloamperes (kA) or tens of thousands of amperes, and the power supply voltage can reach hundreds of volts to kilovolts (kV). When the load being disconnected (high voltage, high current) is very large, an electric arc will be generated in the relay contacts, resulting in a violent arc between the contacts, which is detrimental to achieving disconnection. Summary of the Invention

[0004] This application provides a relay to improve the problem that relays are not conducive to breaking due to electric arcing in the contacts.

[0005] The relay in this application embodiment includes:

[0006] The contact cavity has a contact chamber.

[0007] A contact assembly, comprising two stationary contacts and a movable contact, wherein the stationary contacts are fixedly disposed relative to the contact cavity, and the movable contact is movably disposed within the contact cavity for contacting or separating from the two stationary contacts; and

[0008] An exciter assembly is connected to the inner wall of the contact cavity, and the exciter assembly is 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.

[0009] According to some embodiments of this application, the static contact includes a static component, which is mounted on the top of the contact cavity; the portion of the static component extending out of the outer surface of the contact cavity is an exposed portion, and the portion of the static component extending into the contact cavity is an inserted portion; the shortest distance between the two exposed portions is L1, and the shortest distance between the two inserted portions is L5, where L1 < L5.

[0010] According to some embodiments of this application, the exciter assembly is located between the two stationary contacts.

[0011] According to some embodiments of this application, the contact cavity includes a ceramic cover, and the exciter assembly is connected to the inner wall surface of the top of the ceramic cover.

[0012] According to some embodiments of this application, the contact cavity has a through hole that communicates with the contact chamber. The through hole has an opening near the contact chamber, and the exciter assembly is connected to the circumferential edge region of the opening and passes through the through hole.

[0013] According to some embodiments of this application, the top of the contact cavity includes a base and a protrusion, the protrusion protruding from the base, and the through hole penetrating the protrusion and the base.

[0014] According to some embodiments of this application, the protrusion is provided on the side surface of the base facing the contact chamber and / or on the side surface of the base facing away from the contact chamber.

[0015] According to some embodiments of this application, the exciter assembly is welded to the inner wall of the contact chamber.

[0016] According to some embodiments of this application, the impactor is a gaseous or solid substance.

[0017] According to some embodiments of this application, the exciter is located on the side of the moving contact member facing the stationary contact member.

[0018] According to some embodiments of this application, the static contact includes a static component and a conductive component. The static component is mounted on the contact cavity. The conductive components of the two static contacts are respectively connected to the static components of the two static contacts and extend in a direction that approaches each other. The two conductive components have contact portions at positions close to each other, and the contact portions are used to contact or separate from the moving contact.

[0019] According to some embodiments of this application, the stationary component has an insertion portion extending into the contact chamber, the shortest distance between the two insertion portions is L5, the shortest distance between the two contact portions is L3, and L5 > L3.

[0020] According to some embodiments of this application, the conductive element further has a first arc-guiding portion that extends toward the moving contact and is configured to guide the flow of an electric arc generated by the moving contact and the stationary contact during contact separation.

[0021] According to some embodiments of this application, the conductive element further includes a connecting portion, which is connected to the stationary component. One end of the first arc-guided portion is connected to the connecting portion, and the other end of the first arc-guided portion is connected to the contact portion.

[0022] According to some embodiments of this application, the contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to one side surface of the yoke plate in the thickness direction. The insulating cover and the yoke plate form the contact cavity. The stationary component is installed on the top of the insulating cover.

[0023] 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.

[0024] According to some embodiments of this application, the two conductive elements extend close to each other along the arrangement direction of the two stationary elements.

[0025] According to some embodiments of this application, the conductive element includes a first segment and a second segment connected vertically, the first segment being connected to the stationary component, and the second segment having the contact portion.

[0026] According to some embodiments of this application, the exciter assembly includes an exciter and an adapter connected to the inner wall surface of the contact cavity, the exciter being connected to the adapter, and the exciter being configured to release the impactor into the contact cavity in response to an excitation signal.

[0027] According to some embodiments of this application, the adapter is made of heat-insulating material.

[0028] According to some embodiments of this application, the heat insulation material is any one of the following: plastic, wood, or ceramic.

[0029] According to some embodiments of this application, the adapter includes an adapter sleeve and a flange, one axial end of the adapter sleeve is connected to the inner wall surface of the contact cavity, and the flange is connected to the other axial end of the adapter sleeve.

[0030] The exciter includes a body and an overlapping portion. The body is inserted into the adapter sleeve, and the overlapping portion is connected to the outer peripheral side of the body and overlaps the flange.

[0031] According to some embodiments of this application, the flange protrudes from the outer peripheral side of the adapter sleeve, or the flange protrudes from the inner peripheral side of the adapter sleeve.

[0032] According to some embodiments of this application, the adapter is made of a metallic material.

[0033] According to some embodiments of this application, the contact assembly further includes a second arc guide portion connected to the moving contact and arranged at an angle relative to the moving contact, the second arc guide portion being configured to guide the flow of electric arc generated by the moving contact and the stationary contact during contact separation.

[0034] According to some embodiments of this application, the stationary contact has a receiving space on the side facing the moving contact, and the second guide arc portion extends obliquely from the moving contact in a direction close to the receiving space and away from the stationary contact.

[0035] According to some embodiments of this application, the contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to one side surface of the yoke plate in the thickness direction. The insulating cover and the yoke plate form the contact cavity. The static contact is mounted on the top of the insulating cover.

[0036] 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.

[0037] According to some embodiments of this application, there are two second guide arc portions, and the two second guide arc portions are respectively connected to both ends of the moving contact member in the length direction.

[0038] According to some embodiments of this application, the relay further includes an arc-extinguishing component disposed in the contact chamber for extinguishing the arc generated by the moving contact and the stationary contact during the contact separation process.

[0039] According to some embodiments of this application, the arc extinguishing assembly includes an arc extinguishing grid assembly located on the side of the stationary contact member facing the moving contact member.

[0040] According to some embodiments of this application, the contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to one side surface of the yoke plate in the thickness direction. The insulating cover and the yoke plate form the contact cavity. The static contact is mounted on the top of the insulating cover.

[0041] The arc-extinguishing grid assembly is located on the side of the stationary contact member facing the yoke plate.

[0042] According to some embodiments of this application, the arc extinguishing assembly includes at least one pair of arc extinguishing grid assemblies, with the two pairs of arc extinguishing grid assemblies located at opposite ends of the length direction of the moving contact; the portion of the stationary contact extending beyond the outer surface of the contact cavity is an exposed portion, the shortest distance between the two exposed portions is L1, and the shortest distance between the two pairs of arc extinguishing grid assemblies is L2, where L2≤L1.

[0043] According to some embodiments of this application, the static contact includes a static component mounted on the contact cavity, and the corresponding arc-extinguishing grid assembly and the static component have an overlapping portion on a target plane. The target plane is perpendicular to the contact separation direction of the moving contact and the static contact.

[0044] According to some embodiments of this application, the arc extinguishing assembly includes at least one pair of arc extinguishing grid assemblies, with the two arc extinguishing grid assemblies in the pair located at opposite ends of the moving contact in the longitudinal direction; the shortest distance between the two arc extinguishing grid assemblies in the pair is L2;

[0045] The static contact includes a static component mounted on the contact cavity. The portion of the static component extending into the contact cavity is an insertion portion. The farthest distance between the two insertion portions is L4, where L4 > L2.

[0046] According to some embodiments of this application, all of the static contacts are located on the same side of the dynamic contacts.

[0047] An embodiment of the above application has at least the following advantages or beneficial effects:

[0048] The relay in this embodiment includes an exciter assembly. When an excitation signal is received, the exciter assembly is activated, releasing an impactor into the contact chamber. The impactor drives the moving contact to switch from a state of conduction with the stationary contact to a state of disconnection. Thus, the exciter assembly acts as a "fuse," promptly disconnecting the relay upon the arrival of the excitation signal, which improves the anti-sticking properties of the moving and stationary contacts and enables rapid arc extinguishing. Furthermore, when the exciter assembly is activated, it generates a significant recoil force, which is transmitted to the inner wall of the contact chamber. Since the exciter assembly is connected to the inner wall of the contact chamber, the connection between the exciter assembly and the contact chamber is compressed, resulting in increasingly stronger connections and ensuring reliable connections.

[0049] Furthermore, since L1 < L5, the space reserved between the two insertion parts is greater than the space reserved between the two exposed parts. With the volume of the exciter assembly remaining unchanged, connecting the exciter assembly to the inner wall of the contact cavity instead of arranging it on the outer wall of the contact cavity helps to shorten the distance between the two stationary parts, which is beneficial to the miniaturization design of the product.

[0050] Furthermore, the top of the contact cavity has a base and a protrusion, with the protrusion extending beyond the base and a through hole penetrating both the base and the protrusion. Thus, without increasing the thickness of the base, the axial dimension of the through hole wall can be lengthened by providing the protrusion, thereby increasing the contact area between the exciter assembly and the through hole wall, and improving the stability of the exciter assembly assembly.

[0051] Furthermore, since L5 > L3, sufficient space is reserved between the two insertion parts, and the exciter assembly can be arranged between the two insertion parts to make full use of the space between the two insertion parts. Adding the exciter assembly will not increase the size of the relay too much, which is conducive to the miniaturization design of the product.

[0052] Furthermore, since L3≤L1, while ensuring that the distance between the contact points of the two stationary contacts remains unchanged, the distance between the two exposed parts can be increased as much as possible. In this way, while ensuring the electrical distance, the exciter assembly can be arranged in the space between the two stationary parts.

[0053] 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.

[0054] Furthermore, the adapter is made of heat-insulating material, which can prevent the heat generated by the reciprocating contact and separation of the moving contact and the stationary contact from being transferred to the exciter through the contact cavity, thereby preventing the exciter from being accidentally triggered.

[0055] Furthermore, the adapter is made of metal, which facilitates the use of laser welding when the exciter is connected to the contact cavity via the adapter, ensuring both connection strength and the sealing of the contact cavity.

[0056] Furthermore, the arc-extinguishing component is arranged on the side of the stationary contact facing the yoke plate 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.

[0057] 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.

[0058] 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.

[0059] Furthermore, by providing a first arc-guiding section, the electric arc generated between the moving and stationary contacts can flow along the extension direction of the first 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 first arc-guiding section, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the first 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. Attached Figure Description

[0060] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0061] Figure 1 This is a three-dimensional schematic diagram of the relay according to the first embodiment of this application.

[0062] Figure 2 It is along Figure 1 A sectional view after being cut along the AA section line.

[0063] Figure 3 It is a cross-sectional view of the adapter, ceramic cover, stationary parts and frame after assembly.

[0064] Figure 4 This is a 3D schematic diagram of the adapter.

[0065] Figure 5 This is a three-dimensional schematic diagram of the exciter.

[0066] Figure 6 This is a three-dimensional schematic diagram of the arc extinguishing component.

[0067] Figure 7 This is a three-dimensional schematic diagram of the arc-extinguishing grid assembly.

[0068] Figure 8 This is a 3D schematic diagram of the mounting plate.

[0069] Figure 9 This is a three-dimensional schematic diagram of the grid plate.

[0070] Figure 10 This is a cross-sectional view of the relay according to the second embodiment of this application.

[0071] Figure 11 yes Figure 10 A three-dimensional schematic diagram of the assembled conductive and static components.

[0072] Figure 12 This is a cross-sectional view of a relay according to the third embodiment of this application.

[0073] Figure 13 This is a cross-sectional view of the relay according to the fourth embodiment of this application. Detailed Implementation

[0074] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0075] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0076] like Figure 1 and Figure 2As shown, the relay of this embodiment includes a contact cavity 100, a contact assembly 200, a push rod member 600, and an arc-extinguishing assembly 300. The contact cavity 100 has a contact chamber 101. The contact assembly 200 includes a moving contact 220 and two stationary contacts 210. The stationary contacts 210 are fixedly mounted on the contact cavity 100, and the moving contact 220 is movably disposed within the contact chamber 101 for contacting or separating from the two stationary contacts 210. The push rod member 600 is movable relative to the contact cavity 100, and a portion of the push rod member 600 is located within the contact chamber 101. The moving contact 220 is installed in the portion of the push rod member 600 located within the contact chamber 101. The arc-extinguishing assembly 300 is disposed within the contact chamber 101 for extinguishing the arc generated during the contact and separation process of the moving contact 220 and the stationary contacts 210.

[0077] In one embodiment, all of the stationary contact 210 are located on the same side of the moving contact 220.

[0078] As an example, the contact cavity 100 includes an insulating cover 110 and a yoke plate 130. The insulating cover 110 covers one side of the yoke plate 130 in the thickness direction, and the insulating cover 110 and the yoke plate 130 form a contact cavity 101. The stationary contact member 210 is fixedly mounted on the insulating cover 110.

[0079] In one embodiment, the insulating cover 110 includes a ceramic cover 111 and a frame 112. The ceramic cover 111 is made of ceramic material and is connected to the yoke plate 130 via the frame 112. A static contact 210 is mounted on the top of the ceramic cover 111.

[0080] As an example, the frame piece 112 can be a ring-shaped metal component, such as one made of an iron-nickel alloy. One end of the frame piece 112 is connected to the opening edge of the ceramic cover 111, and the other end is connected to the yoke plate 130. The frame piece 112 is provided between the ceramic cover 111 and the yoke plate 130 to facilitate the connection between the ceramic cover 111 and the yoke plate 130.

[0081] The number of contact components 200 can be one or more groups. When the number of contact components 200 is more than one group, it can be two, three, four or other groups.

[0082] like Figure 1 and Figure 2As shown, the following explanation will take two sets of contact components 200 as an example. For ease of explanation, the arrangement direction of the two stationary contact members 210 of one set of contact components 200 is defined as the first direction D1, the movement direction of the push rod member 600 is defined as the second direction D2, and the third direction D3 is defined. The first direction D1, the second direction D2, and the third direction D3 are all perpendicular to each other. In this embodiment, the contact separation direction between the moving contact member 220 and the stationary contact member 210 is the second direction D2.

[0083] Two sets of contact assemblies 200 are arranged along the third direction D3. The positions of the two stationary contacts 210 of one set of contact assemblies 200 correspond to the positions of the two stationary contacts 210 of the other set of contact assemblies 200.

[0084] like Figure 1 and Figure 2 As shown, the relay in this embodiment further includes an exciter assembly 700, which is connected to the inner wall surface of the contact cavity 100. In one embodiment, the exciter assembly 700 is connected to the inner wall surface of the top of the ceramic cover 111. The exciter assembly 700 is located on the side of the moving contact 220 facing the stationary contact 210. The exciter assembly 700 is configured to release an impactor into the contact cavity 101 in response to an excitation signal, the impactor being capable of driving the moving contact 220 to switch from a state of being connected to the stationary contact 210 to a state of being disconnected from the stationary contact 210.

[0085] The relay in this embodiment includes an exciter assembly 700. When an excitation signal is received, the exciter assembly 700 is activated, thereby releasing an impactor into the contact chamber 101. The impactor drives the moving contact 220 to switch from a state of conduction with the stationary contact 210 to a state of disconnection with the stationary contact 210. Thus, the exciter assembly 700 acts as a "fuse," promptly disconnecting the relay upon the arrival of the excitation signal, which improves the anti-sticking properties of the moving and stationary contacts and enables rapid arc extinguishing. Furthermore, when the exciter assembly 700 is activated, it generates a significant recoil force, which is transmitted to the inner wall of the contact chamber 100. Since the exciter assembly 700 is connected to the inner wall of the contact chamber 100, the connection between the exciter assembly 700 and the contact chamber 100 is compressed, resulting in increasingly stronger connections and ensuring reliable connections.

[0086] In one embodiment, an excitation signal is generated when a threshold current passes through the moving contact 220.

[0087] As an example, the impactor can be a gaseous or solid substance. When the impactor is a gaseous substance, the exciter assembly 700 can release gas into the contact chamber 101 in response to an excitation signal. The gas can impact the contact 220 to disconnect the relay. When the impactor is a solid substance, the exciter assembly 700 can release an object into the contact chamber 101 in response to an excitation signal. This object can impact the contact 220 to disconnect the relay.

[0088] It should be noted that, regardless of whether the impactor is a gaseous or solid substance, the impactor can directly contact the moving contact 220 or indirectly contact the moving contact 220.

[0089] In one embodiment, when the impactor is a gaseous substance, the igniter assembly 700 may include gunpowder. When the threshold current passes through the moving contact 220, the gunpowder is ignited and generates a large amount of gas, forming a gas impact force. This gas impact force can drive the moving contact 220 to move, thereby disconnecting the relay.

[0090] For example, the exciter assembly 700 can be an electric detonator or an electric detonator, but is not limited thereto.

[0091] It should be added that the excitation signal can be determined by whether the current flowing through the moving contact 220 reaches a threshold. Specifically, when the current flowing through the moving contact 220 is greater than or equal to the threshold, the exciter assembly 700 receives an excitation signal; when the current flowing through the moving contact 220 is less than the threshold, the exciter assembly 700 does not receive an excitation signal.

[0092] As an example, the magnitude of the current passing through the moving contact 220 can be monitored by using a Hall effect sensor to monitor the magnetic field strength near the moving contact 220 and the stationary contact 210. Based on the correspondence between magnetic field strength and current value, the current value can be derived from the magnetic field strength.

[0093] Of course, the monitoring of threshold current is not limited to the Hall element mentioned above. For example, it can also be a device that directly monitors the current value passing through the moving contact 220 in the current loop.

[0094] It should be noted that the number of contact components 200 can be one or more, and the number of exciter components 700 can be one or more. When there are multiple contact components 200 and multiple exciter components 700, the number of contact components 200 and multiple exciter components 700 can be equal or unequal.

[0095] For example, in the embodiments of this application, there are two contact components 200 and two exciter components 700, and the two exciter components 700 correspond to the moving contacts 220 of the two contact components 200 respectively.

[0096] In another embodiment, the number of contact components 200 can be multiple, while the number of exciter components 700 is less than the number of contact components 200.

[0097] In one implementation, such as Figure 2 As shown, the exciter assembly 700 is located between two stationary contacts 210.

[0098] like Figure 2 As shown, the stationary contact 210 has stationary components 211, and the exciter assembly 700 is located between the two stationary components 211. The stationary components 211 are mounted on the top of the ceramic cover 111, and have an insertion portion 211a and an exposed portion 211b. The insertion portion 211a extends into the contact chamber 101, and the exposed portion 211b extends out of the outer surface of the contact chamber 100. The shortest distance between the two exposed portions 211b is L1, and the shortest distance between the two insertion portions 211a is L5, where L1 < L5.

[0099] In this embodiment of the application, since L1 < L5, the space reserved between the two insertion parts 211a is larger than the space reserved between the two exposed parts 211b. With the volume of the exciter assembly 700 remaining unchanged, connecting the exciter assembly 700 to the inner wall of the contact cavity 100 instead of arranging it on the outer wall of the contact cavity 100 helps to shorten the distance between the two stationary parts 211, which is beneficial to the miniaturization design of the product.

[0100] like Figure 2 and Figure 3 As shown, the top of the ceramic cover 111 of the contact cavity 100 has a through hole 113, which communicates with the contact cavity 101. The through hole 113 has an opening 113a near the contact cavity 101. The exciter assembly 700 is connected to the circumferential edge region of the opening 113a and passes through the through hole 113.

[0101] In one embodiment, the exciter assembly 700 is welded to the circumferential edge region of the orifice 113a. Specifically, the exciter assembly 700 is inserted into the through hole 113 through the orifice 113a, and then the exciter assembly 700 is connected to the circumferential edge region of the orifice 113a by a welding process.

[0102] like Figure 3 As shown, the top of the ceramic cover 111 has a base 111a and a protrusion 111b, the protrusion 111b protruding from the base 111a, and the through hole 113 penetrating the base 111a and the protrusion 111b.

[0103] In the embodiments of this application, without increasing the thickness of the base 111a, by providing the protrusion 111b, the axial dimension of the hole wall of the through hole 113 can be lengthened, thereby increasing the contact area between the exciter assembly 700 and the hole wall of the through hole 113 and improving the stability of the exciter assembly 700 assembly.

[0104] In one embodiment, a protrusion 111b is provided on the side surface of the base 111a facing the contact chamber 101; or, a protrusion 111b is provided on the side surface of the base 111a facing away from the contact chamber 101; or, both the side surface of the base 111a facing the contact chamber 101 and the side surface of the base 111a facing away from the contact chamber 101 are provided with protrusions 111b.

[0105] Please return to the reference. Figure 2 Each stationary contact 210 also includes a conductive element 212. In the contact assembly 200, the conductive elements 212 of the two stationary contacts 210 are respectively connected to the stationary parts 211 of the two stationary contacts 210 and extend in a direction that approaches each other. The two conductive elements 212 have contact portions 215 at the positions where they approach each other. The contact portions 215 of the two conductive elements 212 are used to contact or separate from the moving contact 220.

[0106] It should be noted that "the direction of mutual approach" refers to the overall tendency of the two conductive components 212 to approach each other, which may include, but is not limited to: the two conductive components 212 approaching each other along a straight line, the two conductive components 212 approaching each other along a curve, and a part of the two conductive components 212 approaching each other, etc.

[0107] The shortest distance between the two insertion portions 211a is L5, and the shortest distance between the contact portions 215 of the two stationary contact members 210 is L3, where L5 > L3.

[0108] In the relay of this application embodiment, since L5 > L3, sufficient space is reserved between the two insertion parts 211a. The exciter assembly 700 can be arranged between the two insertion parts 211a to make full use of the space between the two insertion parts 211a. Adding the exciter assembly 700 will not increase the size of the relay too much, which is beneficial to the miniaturization design of the product.

[0109] Furthermore, the shortest distance between the two exposed portions 211b is L1, and L3 ≤ L1.

[0110] In the relay of this application embodiment, since L3≤L1, the distance between the two exposed portions 211b can be increased as much as possible while ensuring that the distance between the contact portions 215 of the two stationary contacts 210 remains unchanged. In this way, while ensuring the electrical distance, the exciter assembly 700 can be arranged in the space between the two stationary components 211.

[0111] like Figure 2 As shown, in one embodiment, the conductive member 212 includes a first segment 2121 and a second segment 2122 that are vertically connected. The first segment 2121 is connected to the stationary member 211, and the second segment 2122 has a contact portion 215 at one end away from the first segment 2121.

[0112] Please continue reading. Figure 2 The contact assembly 200 also includes a second arc guide portion 230, which is connected to the moving contact member 220 and is arranged at an angle relative to the moving contact member 220. The second arc guide portion 230 is configured to guide the arc flow to the arc extinguishing grid assembly 310.

[0113] In this embodiment, by providing a second arc-guiding portion 230, the electric arc generated between the moving contact 220 and the stationary contact 210 can flow along the extension direction of the second arc-guiding portion 230, thereby lengthening the arc, shortening the arc extinguishing time, preventing the arc from burning the moving and stationary contacts for a long time, and improving the electrical durability of the moving and stationary contacts. Furthermore, with the help of the second arc-guiding portion 230, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the second arc-guiding portion 230, thereby reducing the wear on the contact surface of the moving and stationary contacts, reducing the occurrence of arc spikes, and ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0114] Among them, the phenomenon of sharpening refers to the phenomenon that, under long-term operation or high load, the contact surface develops sharp protrusions or deformations due to current, electric arc or mechanical wear.

[0115] like Figure 2 As shown, the stationary contact 210 has a receiving space 102 on the side facing the moving contact 220, and the second guide arc portion 230 automatically extends the contact 220 at an angle toward the receiving space 102 and away from the stationary contact 210.

[0116] In one embodiment, the second guide arc portion 230 is integrally connected with the moving contact member 220.

[0117] Of course, in other embodiments, the second guide arc portion 230 and the moving contact member 220 can also be connected separately, for example by riveting, welding, interference fit, etc.

[0118] like Figure 2 As shown, the automatic contact member 220 of the second arc guide portion 230 extends in a direction away from the center line of the push rod member 600 and close to the yoke plate 130. One end of the second arc guide portion 230 is connected to the moving contact member 220, and the other end of the second arc guide portion 230 is close to the end of the arc extinguishing grid assembly 310 near the yoke plate 130.

[0119] As an example, there may be two second arc guide portions 230, which are respectively connected to the two ends of the moving contact member 220 in the length direction, and both the second arc guide portions 230 and the moving contact member 220 are located between a pair of arc extinguishing grid assemblies 310.

[0120] like Figures 3 to 5 As shown, the exciter assembly 700 includes an exciter 710 and an adapter 720. The adapter 720 is connected to the inner wall of the contact chamber 100, the exciter 710 is connected to the adapter 720, and the exciter 710 is configured to release an impactor into the contact chamber 101 in response to an excitation signal.

[0121] In the embodiments of this application, the exciter 710 is mounted on the contact cavity 100 via an adapter 720, and is not directly connected to the contact cavity 100.

[0122] In one embodiment, the adapter 720 is made of a metallic material. The metallic material of the adapter 720 facilitates laser welding when the exciter 710 is connected to the contact cavity 100 via the adapter 720, ensuring both connection strength and the sealing of the contact cavity 100.

[0123] In another embodiment, the adapter 720 is made of a heat-insulating material. This prevents the heat generated by the reciprocating contact and separation of the moving contact 220 and the stationary contact 210 from being transferred to the exciter 710 through the contact cavity 100, thereby preventing the exciter 710 from being accidentally triggered.

[0124] As an example, the insulation material can be any of the following: plastic, wood, or ceramic.

[0125] like Figures 3 to 5 As shown, the adapter 720 includes an adapter sleeve 721 and a flange 722. One axial end of the adapter sleeve 721 is connected to the inner wall of the contact cavity 100, and the adapter sleeve 721 communicates with the through hole 113. The flange 722 is connected to the other axial end of the adapter sleeve 721. The exciter 710 includes a body 711 and an overlapping portion 712. The body 711 passes through the adapter sleeve 721 and the through hole 113, and the overlapping portion 712 is connected to the outer peripheral side of the body 711 and overlaps the flange 722.

[0126] In another embodiment, the adapter 720 may also consist of only an adapter sleeve 721, one axial end of which is connected to the top of the ceramic cover 111 and the other end is connected to the exciter 710.

[0127] In another embodiment, a flange 722 is provided at each of the two axial ends of the adapter sleeve 721, one flange 722 is connected to the top of the ceramic cover 111, and the other flange 722 is connected to the exciter 710.

[0128] It is understood that the adapter 720 and the ceramic cover 111, as well as the adapter 720 and the exciter 710, can be connected by welding, gluing, or other methods, and this application does not impose any special restrictions on this.

[0129] It should be added that the flange 722 may protrude from the outer peripheral side of the adapter sleeve 721; or, the flange 722 may protrude from the inner peripheral side of the adapter sleeve 721.

[0130] Please return to the reference. Figure 2 The arc-extinguishing component 300 is located on the side of the stationary contact 210 facing the moving contact 220. In this embodiment of the application, the arc-extinguishing component 300 is located on the side of the stationary contact 210 facing the yoke plate 130.

[0131] In the relay of this application embodiment, the arc extinguishing component 300 is arranged on the side of the stationary contact 210 facing the moving contact 220, so as to make full use of the space on the side of the stationary contact 210 facing the moving contact 220, without occupying too much space of the relay along the arrangement direction of the two stationary contacts 210. This ensures the arc extinguishing effect of the arc extinguishing component 300, and avoids making the relay too large, which is conducive to the miniaturization design of the product.

[0132] like Figure 6 As shown, the arc-extinguishing assembly 300 includes an isolation seat 320 and at least one pair of arc-extinguishing grid assemblies 310. The isolation seat 320 is disposed within the contact chamber 101, for example, the isolation seat 320 is fixedly connected to the yoke plate 130, and the arc-extinguishing grid assemblies 310 are mounted on the isolation seat 320. The two paired arc-extinguishing grid assemblies 310 are respectively located on the side of the two stationary contacts 210 of the contact assembly 200 facing the yoke plate 130, and are used to extinguish the arc generated by the moving contact 220 and the two stationary contacts 210.

[0133] In the embodiments of this application, the two paired arc-extinguishing grid assemblies 310 are respectively located on the side of the stationary part 211 of the two stationary contacts 210 of the contact assembly 200 facing the yoke plate 130.

[0134] In one embodiment, the number of arc-extinguishing grid assemblies 310 is the same as the number of stationary contacts 210. For example, the number of both arc-extinguishing grid assemblies 310 and stationary contacts 210 is four, but this is not a limitation.

[0135] Of course, in other embodiments, when the number of static contacts 210 is four, the number of arc extinguishing grid components 310 included in the arc extinguishing assembly 300 can also be two. The two arc extinguishing grid components 310 are arranged along the first direction D1, and each arc extinguishing grid component 310 has a larger size along the third direction D3 so as to cover multiple moving contacts 220.

[0136] like Figure 2 As shown, the two paired arc-extinguishing grid assemblies 310 are located at both ends of the length direction (first direction D1) of the moving contact 220. The corresponding arc-extinguishing grid assembly 310 and the stationary part 211 of the stationary contact 210 have an overlapping portion on a target plane, and the target plane is perpendicular to the contact separation direction (second direction D2) of the moving contact 220 and the stationary contact 210.

[0137] In the embodiments of this application, in the contact separation direction of the moving contact 220 and the stationary contact 210, the arc extinguishing grid assembly 310 and the stationary component 211 have an overlapping portion, and the two paired arc extinguishing grid assemblies 310 are respectively located at both ends of the length direction of the moving contact 220, so that the arc extinguishing grid assembly 310 is as close as possible to the contact position of the moving contact 220 and the stationary contact 210, and when an electric arc is generated between the moving contact 220 and the stationary contact 210, the electric arc can enter the arc extinguishing grid assembly 310 with the shortest path, thereby accelerating the arc extinguishing speed.

[0138] In one embodiment, the conductive component 212 and the stationary component 211 are connected separately, for example by welding, riveting, interference fit, or other methods.

[0139] Of course, in other embodiments, the conductive element 212 and the stationary element 211 can also be integrally connected, that is, the stationary contact element 210 is a single piece.

[0140] In one embodiment, the conductive element 212 can be connected to the bottom of the stationary element 211 or to the side of the stationary element 211. Of course, the conductive element 212 can also be connected to both the bottom and the side of the stationary element 211 at the same time. This application does not limit this.

[0141] like Figure 2 As shown, the shortest distance between the exposed portions 211b of the two stationary contacts 210 of the contact assembly 200 is L1, and the shortest distance between the two paired arc-extinguishing grid assemblies 310 is L2, where L2≤L1.

[0142] In this embodiment of the application, since L2≤L1, the arc extinguishing grid assembly 310 is closer to the moving contact 220 to accelerate the arc extinguishing speed.

[0143] In one embodiment, the farthest distance between the insertion portions 211a of the two stationary components 211 is L4, where L4 > L2.

[0144] In this embodiment of the application, since L4 > L2, the arc extinguishing grid assembly 310 can be arranged below the insertion part 211a to improve the space utilization rate within the contact cavity 100, which is beneficial for product miniaturization design.

[0145] The conductive element 212 can be connected to the insertion part 211a.

[0146] like Figure 7 and Figure 8 As shown, the arc extinguishing grid assembly 310 includes a mounting member 311 and a plurality of grid plates 312. The plurality of grid plates 312 are mounted on the mounting member 311 and arranged along the contact separation direction (second direction D2) between the moving contact member 220 and the stationary contact member 210. There is a gap between two adjacent grid plates 312.

[0147] like Figure 7 As shown, in one embodiment, the mounting member 311 includes two oppositely arranged mounting plates 3111, and a plurality of grid plates 312 are mounted between the two mounting plates 3111.

[0148] like Figure 8 and Figure 9 As shown, in one embodiment, the mounting plate 3111 and the grid plate 312 have a locking hole 313 on one of them and a locking part 314 on the other, the locking part 314 being engaged into the locking hole 313.

[0149] For example, the mounting plate 3111 has a snap-fit ​​hole 313 and the grid plate 312 has a snap-fit ​​portion 314; or, the mounting plate 3111 has a snap-fit ​​portion 314 and the grid plate 312 has a snap-fit ​​hole 313.

[0150] It should be noted that the connection between the grid plate 312 and the mounting component 311 is not limited to a snap-fit ​​method. For example, multiple slots can be provided on the mounting component 311, and the grid plate 312 can be inserted into the slots.

[0151] like Figure 10 and Figure 11 As shown, the similarities between the relay of the second embodiment of this application and the relay of the first embodiment described above will not be repeated, but the differences are as follows:

[0152] The conductive element 212 of the stationary contact 210 includes a first arc-guiding portion 214 arranged at an angle relative to the moving contact 220. The first arc-guiding portion 214 extends toward the moving contact 220 and is configured to guide the flow of the electric arc generated during the contact separation process between the moving contact 220 and the stationary contact 210 to flow toward the arc-extinguishing assembly 300.

[0153] In this embodiment, by providing a first arc-guiding portion 214, the electric arc generated between the moving contact 220 and the stationary contact 210 can flow along the extension direction of the first arc-guiding portion 214, thereby lengthening the arc, shortening the arc extinguishing time, preventing the arc from burning the moving and stationary contacts for a long time, and improving the electrical durability of the moving and stationary contacts. Furthermore, with the help of the first arc-guiding portion 214, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion 214, thereby reducing the wear of the contact surface of the moving and stationary contacts, reducing the occurrence of arc spikes, and ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0154] The first guide arc portion 214 can extend along a straight line or along a curve, and this application does not limit it in this regard.

[0155] The conductive component 212 also includes a connecting portion 213, which is connected to the stationary component 211. One end of the first arc-shaped portion 214 is connected to the connecting portion 213, and the other end of the first arc-shaped portion 214 is connected to the contact portion 215. The moving contact component 220 is used to contact or separate from the contact portion 215. The first arc-shaped portion 214 extends from the connecting portion 213 toward the center line of the push rod component 600 and the yoke plate 130.

[0156] As can be seen from the present application embodiment, the conductive member 212 has an inclined first arc-guiding portion 214, and the first arc-guiding portion 214 extends from the connecting portion 213 toward the direction close to the moving contact member 220. At the same time, the end of the conductive member 212 away from the stationary member 211 has a contact portion 215. The arrangement of the conductive member 211 can not only ensure the distance between the two stationary members 211 to provide a sufficiently long electrical distance and arrange other components, but also the first arc-guiding portion 214 of the conductive member 211 can guide the arc so that the arc flows to the arc-extinguishing assembly 300 in time. At the same time, the conductive member 212 has reserved space on the side facing the moving contact member 220, which can be used to arrange other components, improving the space utilization of the relay and facilitating the miniaturization design of the product.

[0157] like Figure 10 As shown, the tilt direction of the first guide arc portion 214 is arranged at an angle to the tilt direction of the second guide arc portion 230. This angle can be an acute angle or an obtuse angle.

[0158] In the embodiments of this application, the first arc guiding portion 214 and the second arc guiding portion 230 form a flared structure, which helps to confine the arc between the first arc guiding portion 214 and the second arc guiding portion 230, thereby accelerating the arc flow to the arc extinguishing component 300 and shortening the arc extinguishing time.

[0159] like Figure 12 As shown, the similarities between the relay of the third embodiment and the relay of the first embodiment will not be repeated here, but the differences are as follows:

[0160] The stationary contact 210 includes a stationary component 211 but not a conductive component 212. The stationary component 211 is mounted on the top of the ceramic cover 111. The moving contact 220 is used to contact or separate from the stationary component 211.

[0161] like Figure 13 As shown, the similarities between the relay of the fourth embodiment and the relay of the first embodiment will not be repeated here, but the differences are as follows:

[0162] The conductive element 212 is flat, and one end of the two conductive elements 212 is connected to two stationary parts 211 respectively. Starting from the corresponding stationary part 211, they extend along the first direction D1 and toward each other.

[0163] In summary, the relays of the embodiments of this application have at least the following advantages and beneficial effects:

[0164] The relay in this embodiment includes an exciter assembly 700. When an excitation signal is received, the exciter assembly 700 is activated, thereby releasing an impactor into the contact chamber 101. The impactor drives the moving contact 220 to switch from a state of conduction with the stationary contact 210 to a state of disconnection with the stationary contact 210. Thus, the exciter assembly 700 acts as a "fuse," promptly disconnecting the relay upon the arrival of the excitation signal, which improves the anti-sticking properties of the moving and stationary contacts and enables rapid arc extinguishing. Furthermore, when the exciter assembly 700 is activated, it generates a significant recoil force, which is transmitted to the inner wall of the contact chamber 100. Since the exciter assembly 700 is connected to the inner wall of the contact chamber 100, the connection between the exciter assembly 700 and the contact chamber 100 is compressed, resulting in increasingly stronger connections and ensuring reliable connections.

[0165] Furthermore, since L1 < L5, the space reserved between the two insertion parts 211a is larger than the space reserved between the two exposed parts 211b. With the volume of the exciter assembly 700 remaining unchanged, connecting the exciter assembly 700 to the inner wall of the contact cavity 100 instead of arranging it on the outer wall of the contact cavity 100 helps to shorten the distance between the two stationary parts 211, which is beneficial to the miniaturization design of the product.

[0166] Furthermore, the top of the ceramic cover 111 has a base 111a and a protrusion 111b, with the protrusion 111b protruding from the base 111a and the through hole 113 penetrating through the base 111a and the protrusion 111b. Thus, without increasing the thickness of the base 111a, by providing the protrusion 111b, the axial dimension of the hole wall of the through hole 113 can be lengthened, thereby increasing the contact area between the exciter assembly 700 and the hole wall of the through hole 113, and improving the stability of the exciter assembly 700 assembly.

[0167] Furthermore, since L5 > L3, sufficient space is reserved between the two insertion parts 211a, and the exciter assembly 700 can be arranged between the two insertion parts 211a to make full use of the space between the two insertion parts 211a. Adding the exciter assembly 700 will not increase the size of the relay too much, which is conducive to the miniaturization design of the product.

[0168] Furthermore, since L3≤L1, while ensuring that the distance between the contact portions 215 of the two stationary contact members 210 remains unchanged, the distance between the two exposed portions 211b can be increased as much as possible. In this way, while ensuring the electrical distance, the exciter assembly 700 can be arranged in the space between the two stationary members 211.

[0169] Furthermore, the adapter 720 is made of heat-insulating material, which can prevent the heat generated by the reciprocating contact and separation of the moving contact 220 and the stationary contact 210 from being transferred to the exciter 710 through the contact cavity 100, thereby preventing the exciter 710 from being accidentally triggered.

[0170] Furthermore, the adapter 720 is made of metal material. When the exciter 710 is connected to the contact cavity 100 through the adapter 720, it is convenient to use laser welding process for connection, which ensures both connection strength and the sealing of the contact cavity 100.

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

[0172] Furthermore, in the contact separation direction of the moving contact 220 and the stationary contact 210, the arc-extinguishing grid assembly 310 overlaps with the stationary contact 210, and the two paired arc-extinguishing grid assemblies 310 are located at both ends of the length direction of the moving contact 220, so that the arc-extinguishing grid assembly 310 is as close as possible to the contact position of the moving contact 220 and the stationary contact 210. Thus, when an electric arc is generated between the moving contact 220 and the stationary contact 210, the electric arc can enter the arc-extinguishing grid assembly 310 with the shortest path, thereby accelerating the arc extinguishing speed.

[0173] Furthermore, the shortest distance between the stationary parts 211 of the two stationary contacts 210 of the contact assembly 200 is L1, and the shortest distance between the two paired arc-extinguishing grid assemblies 310 is L2. Since L2≤L1, the arc-extinguishing grid assembly 310 is closer to the moving contact 220 to accelerate the arc extinguishing speed.

[0174] Furthermore, by providing the first arc-guiding portion 214, the electric arc generated between the moving contact 220 and the stationary contact 210 can flow along the extension direction of the first arc-guiding portion 214, thereby lengthening the arc, shortening the arc extinguishing time, preventing the arc from burning the moving and stationary contacts for a long time, and improving the electrical durability of the moving and stationary contacts. In addition, with the help of the first arc-guiding portion 214, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the first arc-guiding portion 214, thereby reducing the 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.

[0175] Furthermore, by providing the second arc-guiding portion 230, the electric arc generated between the moving contact 220 and the stationary contact 210 can flow along the extension direction of the second arc-guiding portion 230, thereby lengthening the arc, shortening the arc extinguishing time, preventing the arc from burning the moving and stationary contacts for a long time, and improving the electrical durability of the moving and stationary contacts. In addition, with the help of the second arc-guiding portion 230, the arc can be transferred from the contact surface of the moving and stationary contacts to the end of the second arc-guiding portion 230, thereby reducing the loss of the contact surface of the moving and stationary contacts, reducing the occurrence of arc spikes, and ensuring the electrical clearance and withstand voltage breakdown capability between the moving and stationary contacts.

[0176] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A relay, characterized in that, include: The contact cavity has a contact chamber. A contact assembly, comprising two stationary contacts and a movable contact, wherein the stationary contacts are fixedly disposed relative to the contact cavity, and the movable contact is movably disposed within the contact cavity for contacting or separating from the two stationary contacts; and An exciter assembly is connected to the inner wall of the contact cavity, and the exciter assembly is 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.

2. The relay according to claim 1, characterized in that, The static contact includes a static component, which is installed on the top of the contact cavity; the portion of the static component extending out of the outer surface of the contact cavity is an exposed portion, and the portion of the static component extending into the contact cavity is an inserted portion. The shortest distance between the two exposed portions is L1, and the shortest distance between the two inserted portions is L5, where L1 < L5.

3. The relay according to claim 1, characterized in that, The exciter assembly is located between the two stationary contacts.

4. The relay according to claim 1, characterized in that, The contact cavity includes a ceramic cover, and the exciter assembly is connected to the inner wall surface of the top of the ceramic cover.

5. The relay according to claim 1, characterized in that, The contact cavity has a through hole that communicates with the contact chamber. The through hole has an opening near the contact chamber. The exciter assembly is connected to the circumferential edge region of the opening and passes through the through hole.

6. The relay according to claim 5, characterized in that, The top of the contact cavity includes a base and a protrusion, the protrusion protruding from the base, and the through hole penetrating the protrusion and the base.

7. The relay according to claim 6, characterized in that, The protrusion is provided on the side surface of the base facing the contact chamber and / or on the side surface of the base facing away from the contact chamber.

8. The relay according to claim 1, characterized in that, The exciter assembly is welded to the inner wall of the contact chamber.

9. The relay according to claim 1, characterized in that, The impactor is a gaseous or solid substance.

10. The relay according to claim 1, characterized in that, The exciter is located on the side of the moving contact member facing the stationary contact member.

11. The relay according to claim 1, characterized in that, The static contact includes a static component and a conductive component. The static component is mounted on the contact cavity. The conductive components of the two static contacts are respectively connected to the static components of the two static contacts and extend in a direction that approaches each other. The two conductive components have contact portions at positions close to each other, and the contact portions are used to contact or separate from the moving contact.

12. The relay according to claim 11, characterized in that, The stationary component has an insertion portion that extends into the contact chamber. The shortest distance between the two insertion portions is L5, and the shortest distance between the two contact portions is L3, where L5 > L3.

13. The relay according to claim 11, characterized in that, The conductive element also has a first arc-guiding portion that extends toward the moving contact and is configured to guide the flow of an electric arc generated by the moving contact and the stationary contact during contact separation.

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

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

16. The relay according to claim 11, characterized in that, The two conductive elements extend close to each other along the arrangement direction of the two stationary elements.

17. The relay according to claim 11, characterized in that, The conductive component includes a first segment and a second segment connected vertically, the first segment being connected to the stationary component, and the second segment having the contact portion.

18. The relay according to any one of claims 1-17, characterized in that, The exciter assembly includes an exciter and an adapter, the adapter being connected to the inner wall of the contact cavity, the exciter being connected to the adapter, and the exciter being configured to release the impactor into the contact cavity in response to an excitation signal.

19. The relay according to claim 18, characterized in that, The adapter is made of heat-insulating material.

20. The relay according to claim 19, characterized in that, The heat insulation material is any one of the following: plastic, wood, or ceramic.

21. The relay according to claim 18, characterized in that, The adapter includes an adapter sleeve and a flange. One axial end of the adapter sleeve is connected to the inner wall surface of the contact cavity, and the flange is connected to the other axial end of the adapter sleeve. The exciter includes a body and an overlapping portion. The body is inserted into the adapter sleeve, and the overlapping portion is connected to the outer peripheral side of the body and overlaps the flange.

22. The relay according to claim 21, characterized in that, The flange protrudes from the outer peripheral side of the adapter sleeve, or the flange protrudes from the inner peripheral side of the adapter sleeve.

23. The relay according to claim 18, characterized in that, The adapter is made of metal.

24. The relay according to any one of claims 1-17, characterized in that, The contact assembly further includes a second arc guide portion connected to the moving contact and arranged at an angle relative to the moving contact. The second arc guide portion is configured to guide the flow of electric arc generated by the moving contact and the stationary contact during the contact separation process.

25. The relay according to claim 24, characterized in that, The stationary contact has a receiving space on the side facing the moving contact, and the second guide arc extends obliquely from the moving contact toward the receiving space and away from the stationary contact.

26. The relay according to claim 24, characterized in that, The contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to one side surface of the yoke plate in the thickness direction. The insulating cover and the yoke plate form the contact cavity. The static contact is installed on the top of the insulating cover. The relay further includes a push rod component that is movable relative to the yoke plate, and a movable contact is mounted on the push rod component; the second guide arc portion extends from the movable contact in a direction away from the center line of the push rod component and close to the yoke plate.

27. The relay according to claim 24, characterized in that, There are two second guide arc portions, and the two second guide arc portions are respectively connected to the two ends of the moving contact member in the length direction.

28. The relay according to any one of claims 1-17, characterized in that, The relay also includes an arc-extinguishing component disposed in the contact chamber, used to extinguish the arc generated by the moving contact and the stationary contact during the contact separation process.

29. The relay according to claim 28, characterized in that, The arc extinguishing assembly includes an arc extinguishing grid assembly, which is located on the side of the stationary contact member facing the moving contact member.

30. The relay according to claim 29, characterized in that, The contact cavity includes an insulating cover and a yoke plate. The insulating cover is connected to one side surface of the yoke plate in the thickness direction. The insulating cover and the yoke plate form the contact cavity. The static contact is installed on the top of the insulating cover. The arc-extinguishing grid assembly is located on the side of the stationary contact member facing the yoke plate.

31. The relay according to claim 28, characterized in that, The arc extinguishing assembly includes at least one pair of arc extinguishing grid assemblies, with the two pairs of arc extinguishing grid assemblies located at opposite ends of the length direction of the moving contact; the portion of the stationary contact extending beyond the outer surface of the contact cavity is the exposed portion, the shortest distance between the two exposed portions is L1, and the shortest distance between the two pairs of arc extinguishing grid assemblies is L2, where L2≤L1.

32. The relay according to claim 31, characterized in that, The static contact includes a static component mounted on the contact cavity. The corresponding arc-extinguishing grid assembly and the static component have an overlapping portion on a target plane. The target plane is perpendicular to the contact separation direction of the moving contact and the static contact.

33. The relay according to claim 28, characterized in that, The arc extinguishing assembly includes at least one pair of arc extinguishing grid assemblies, with the two arc extinguishing grid assemblies in the pair located at opposite ends of the moving contact in the longitudinal direction; the shortest distance between the two arc extinguishing grid assemblies in the pair is L2; The static contact includes a static component mounted on the contact cavity. The portion of the static component extending into the contact cavity is an insertion portion. The farthest distance between the two insertion portions is L4, where L4 > L2.

34. The relay according to any one of claims 1-17, characterized in that, All of the static contacts are located on the same side of the moving contact.

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