Relay

Abstract

The utility model discloses a relay which comprises a contact cavity, a contact assembly and an exciter assembly. The contact cavity is provided with a contact chamber; the contact assembly comprises two static contact pieces and a movable contact piece, the static contact pieces are fixedly arranged relative to the contact cavity, and the movable contact piece is movably arranged in the contact cavity and used for making contact with or being separated from the two static contact pieces; the exciter assembly is connected to the inner wall surface of the contact cavity, the exciter assembly is configured to release an impact object into the contact cavity in response to an excitation signal, and the impact object can enable the moving contact to be switched from a state of being conducted with the static contact to a state of being disconnected with the static contact.

Description

TECHNICAL FIELD

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

[0002] A relay is an electronic control device, which has a control system (also known as an input loop) and a controlled system (also known as an output loop), and is usually applied in an automatic control circuit. The relay is actually a kind of "automatic switch" for controlling a larger current with a smaller current. Therefore, the relay plays a role of automatic adjustment, safety protection, and conversion of a circuit.

[0003] When an abnormal overload such as overcurrent occurs in the power circuit, the relay is required to break the circuit to cut off the overload current of the circuit, thereby playing a role of safety protection. According to the capacity of the power supply, the current can reach kiloampere (kA) or even megaampere, and the power supply voltage can reach hundreds of volts to thousands of volts (kV). When the load to be broken (high voltage and large current) is large, the relay contact will produce an arc, and the arc between the contacts will burn fiercely at once, which is not conducive to breaking. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a relay to improve the problem that the relay is not conducive to breaking due to the arc generated by the contact.

[0005] The relay of the present application comprises:

[0006] a contact cavity having a contact chamber;

[0007] a contact assembly, the contact assembly comprising two static contacts and a dynamic contact, the static contacts being fixedly arranged relative to the contact cavity, and the dynamic contact being movably arranged in the contact chamber and being used to contact or separate from the two static contacts; and

[0008] an exciter assembly connected to an inner wall surface of the contact cavity, and the exciter assembly being configured to release an impact object into the contact chamber in response to an excitation signal, the impact object being capable of switching the dynamic contact from a state of conduction with the static contacts to a state of disconnection with the static contacts.

[0009] According to some embodiments of the present application, the static contact comprises a static part arranged on the top of the contact cavity; a part of the static part protruding out of the outer surface of the contact cavity is an exposed part, a part of the static part inserted into the contact chamber is an inserted part, the shortest distance between the two exposed parts is L1, and the shortest distance between the two inserted parts is L5, and L1 < L5.

[0010] According to some embodiments of the present application, the igniter assembly is located between two of the static contacts.

[0011] According to some embodiments of the present application, the contact cavity comprises a ceramic cover, and the igniter assembly is connected to an inner wall surface of a top portion of the ceramic cover.

[0012] According to some embodiments of the present application, the contact cavity has a through hole that is in communication with the contact chamber, the through hole has an orifice near the contact chamber, the igniter assembly is connected to a circumferential edge region of the orifice and is disposed in the through hole.

[0013] According to some embodiments of the present application, a top portion of the contact cavity comprises a base portion and a protruding portion, the protruding portion protrudes from the base portion, and the through hole penetrates the protruding portion and the base portion.

[0014] According to some embodiments of the present application, one side surface of the base portion facing the contact chamber and / or one side surface of the base portion facing away from the contact chamber is provided with the protruding portion.

[0015] According to some embodiments of the present application, the igniter assembly is welded to an inner wall surface of the contact chamber.

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

[0017] According to some embodiments of the present application, the igniter is located on a side of the moving contact facing the static contact.

[0018] According to some embodiments of the present application, the static contact comprises a static part and a conductive part, the static part is arranged on the contact cavity, the conductive parts of the two static contacts are respectively connected to the static parts of the two static contacts and extend towards each other, and the conductive parts have contact portions at a position close to each other, the contact portions are used for contacting or separating from the moving contact.

[0019] According to some embodiments of the present application, the static part 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 the present application, the conductive part further has a first arc guiding portion, the first arc guiding portion extends towards the moving contact and is configured to guide the arc generated during the contact and separation of the moving contact and the static contact.

[0021] According to some embodiments of the present application, the electrically conductive member further comprises a connecting portion connected to the static member, one end of the first arc conducting portion is connected to the connecting portion, and the other end of the first arc conducting portion is connected to the contact portion.

[0022] According to some embodiments of the present application, the contact cavity comprises 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 enclose the contact cavity, and the static member is arranged on the top of the insulating cover.

[0023] The relay further comprises a push rod member movable relative to the yoke plate, and the movable contact is arranged on the push rod member; the first arc conducting portion extends from the connecting portion towards the center line of the push rod member and the yoke plate.

[0024] According to some embodiments of the present application, two electrically conductive members extend close to each other along the arrangement direction of the two static members.

[0025] According to some embodiments of the present application, the electrically conductive member comprises a first segment and a second segment connected perpendicularly, the first segment is connected to the static member, and the second segment has the contact portion.

[0026] According to some embodiments of the present application, the trigger assembly comprises a trigger and an adapter, the adapter is connected to the inner wall surface of the contact cavity, and the trigger is connected to the adapter, the trigger is configured to release the impact object into the contact cavity in response to a trigger signal.

[0027] According to some embodiments of the present application, the adapter is made of a heat insulation material.

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

[0029] According to some embodiments of the present application, the adapter comprises 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 trigger comprises a body and a lap portion, the body is arranged in the adapter sleeve, the lap portion is connected to the outer peripheral side surface of the body and lapped with the flange.

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

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

[0033] According to some embodiments of the present application, the contact assembly further comprises a second arc guiding portion connected to the movable contact and arranged obliquely relative to the movable contact, the second arc guiding portion being configured to guide the arc generated by the movable contact and the stationary contact during contact separation.

[0034] According to some embodiments of the present application, the stationary contact has a receiving space on a side facing the movable contact, and the second arc guiding portion extends obliquely from the movable contact towards the receiving space and away from the stationary contact.

[0035] According to some embodiments of the present application, the contact cavity comprises an insulating cover connected to a side surface of the yoke plate in the thickness direction, and the insulating cover and the yoke plate enclose the contact chamber, and the stationary contact is arranged on the top of the insulating cover.

[0036] The relay further comprises a push rod member movable relative to the yoke plate, and the movable contact is arranged on the push rod member, and the second arc guiding portion extends from the movable contact towards the center line of the push rod member and away from the yoke plate.

[0037] According to some embodiments of the present application, the number of the second arc guiding portions is two, and the two second arc guiding portions are respectively connected to the two ends of the movable contact in the length direction.

[0038] According to some embodiments of the present application, the relay further comprises an arc extinguishing assembly arranged in the contact chamber and configured to extinguish the arc generated by the movable contact and the stationary contact during contact separation.

[0039] According to some embodiments of the present application, the arc extinguishing assembly comprises an arc grid assembly arranged on a side of the stationary contact facing the movable contact.

[0040] According to some embodiments of the present application, the contact cavity comprises an insulating cover connected to a side surface of the yoke plate in the thickness direction, and the insulating cover and the yoke plate enclose the contact chamber, and the stationary contact is arranged on the top of the insulating cover.

[0041] The arc grid assembly is arranged on a side of the stationary contact facing the yoke plate.

[0042] According to some embodiments of the present application, the arc extinguishing assembly comprises at least one pair of arc extinguishing grid assemblies, and the two arc extinguishing grid assemblies in each pair are respectively located at two ends of the dynamic contact piece in the length direction; the two exposed parts of the static contact piece have a shortest distance L1, and the two arc extinguishing grid assemblies in each pair have a shortest distance L2, and L2≤L1.

[0043] According to some embodiments of the present application, the static contact piece comprises a static part arranged on the contact cavity, and the corresponding arc extinguishing grid assembly and the static part have an overlapping part in the orthographic projection on a target plane, and the target plane is perpendicular to the contact separation direction of the dynamic contact piece and the static contact piece.

[0044] According to some embodiments of the present application, the arc extinguishing assembly comprises at least one pair of arc extinguishing grid assemblies, and the two arc extinguishing grid assemblies in each pair are respectively located at two ends of the dynamic contact piece in the length direction; the two arc extinguishing grid assemblies in each pair have a shortest distance L2.

[0045] The static contact piece comprises a static part arranged on the contact cavity, and the part of the static part inserted into the contact cavity is an insertion part, and the two insertion parts have a farthest distance L4, and L4>L2.

[0046] According to some embodiments of the present application, the static contact piece is located on the same side of the dynamic contact piece.

[0047] The above-mentioned embodiment has at least the following advantages or beneficial effects:

[0048] The relay of the embodiment of the present application comprises an exciter assembly, which is activated when the excitation signal appears, so that the exciter assembly releases an impact object into the contact chamber, and the impact object can drive the dynamic contact piece to switch from the state of conduction with the static contact piece to the state of disconnection with the static contact piece. In this way, the exciter assembly plays the role of a fuse to timely disconnect the relay when the excitation signal appears, which is beneficial to improve the anti-sticking property of the dynamic and static contact pieces and realize rapid arc extinguishing. In addition, when the exciter assembly is excited, a large impact recoil force is generated, which is transmitted to the inner wall surface of the contact cavity. Since the exciter assembly is connected with the inner wall surface of the contact cavity, the connection part of the exciter assembly and the contact cavity is pressed, so that the connection strength of the connection part is higher and higher, thereby ensuring the reliability of the connection.

[0049] Further, since L1 < L5, the space reserved between the two insertion portions is larger than the space reserved between the two exposed portions, and in the case of a constant volume of the exciter assembly, connecting the exciter assembly to the inner wall of the contact cavity rather than arranging it on the outer wall of the contact cavity is more conducive to reducing the distance between the two static components, thereby facilitating product miniaturization design.

[0050] Further, the top of the contact cavity has a base and a protrusion, the protrusion protruding from the base, and the through hole penetrating the base and the protrusion. In this way, without increasing the thickness of the base, the axial dimension of the hole wall of the through hole is lengthened by arranging the protrusion, thereby increasing the contact area between the exciter assembly and the hole wall of the through hole and improving the stability of the exciter assembly assembly.

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

[0052] Further, since L3 ≤ L1, the distance between the contact portions of the two static contacts is ensured to be constant, and the distance between the two exposed portions is as large as possible. In this way, on the basis of ensuring the electrical distance, the exciter assembly can be arranged in the space between the two static components.

[0053] Further, by arranging the second arc guiding portion, the arc generated between the moving contact and the static contact can flow along the extension direction of the second arc guiding portion, so that the arc is lengthened, the arc extinction time is shortened, the dynamic and static contacts are prevented from being ablated for a long time, and the electrical endurance of the dynamic and static contacts is improved. In addition, with the help of the second arc guiding portion, the arc can be transferred from the contact surface of the dynamic and static contacts to the end of the second arc guiding portion, thereby reducing the loss of the contact surface of the dynamic and static contacts, reducing the occurrence of the sharp phenomenon, and ensuring the electrical gap and voltage breakdown resistance between the dynamic and static contacts.

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

[0055] Further, the adapter is made of metal material, which facilitates connection by laser welding process when the exciter is connected to the contact cavity through the adapter, thereby ensuring the connection strength and the sealing of the contact cavity.

[0056] Further, the arc extinguishing assembly is arranged on the side of the static contact facing the yoke plate, so as to make full use of the space between the static contact and the yoke plate without occupying too much space of the relay along the arrangement direction of the two static contacts, thus ensuring the arc extinguishing effect of the arc extinguishing assembly and avoiding the increase of the size of the relay, which is beneficial to the miniaturization design of the product.

[0057] Further, in the contact separation direction of the moving contact and the static contact, the arc extinguishing grid assembly overlaps with the static contact, and the two arc extinguishing grid assemblies are respectively 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 static contact, and thus when the arc is generated between the moving contact and the static contact, the arc can enter the arc extinguishing grid assembly in the shortest path, thereby accelerating the arc extinguishing speed.

[0058] Further, the shortest distance between the two exposed parts is L1, and the shortest distance between the two arc extinguishing grid assemblies is L2, and since L2≤L1, the arc extinguishing grid assembly is closer to the moving contact, so as to accelerate the arc extinguishing speed.

[0059] Further, by arranging the first arc guiding part, the arc generated between the moving contact and the static contact can flow along the extension direction of the first arc guiding part, so that the arc is elongated, the arc extinguishing time is shortened, the long-time ablation of the moving and static contacts by the arc is avoided, and the electrical endurance of the moving and static contacts is improved. In addition, by means of the first arc guiding part, the arc can be transferred from the contact surface of the moving and static contacts to the end of the first arc guiding part, thereby reducing the loss of the contact surface of the moving and static contacts and reducing the occurrence of the sharp phenomenon, and ensuring the electrical gap and the voltage breakdown resistance between the moving and static contacts. BRIEF DESCRIPTION OF DRAWINGS

[0060] The drawings incorporated into the specification and constituting a part of the specification show embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained from these drawings without creative labor for those skilled in the art.

[0061] Figure 1 is a perspective view of a relay of the first embodiment of the present application.

[0062] Figure 2 is a sectional view along the A-A sectional line of Figure 1 .

[0063] Figure 3 is a sectional view of the relay after the adapter, the ceramic cover, the static part and the frame piece are assembled.

[0064] Figure 4 is a perspective view of the adapter.

[0065] Figure 5 is a perspective view of the exciter.

[0066] Figure 6 is a perspective view of the arc extinguishing assembly.

[0067] Figure 7 is a perspective view of the arc runner assembly.

[0068] Figure 8 is a perspective view of the mounting plate.

[0069] Figure 9 is a perspective view of the grid sheet.

[0070] Figure 10 is a sectional view of the relay of the second embodiment of the present application.

[0071] Figure 11 is a perspective view of the conductive member and the stationary member of Figure 10

[0072] Figure 12 is a sectional view of the relay of the third embodiment of the present application.

[0073] Figure 13 is a sectional view of the relay of the fourth embodiment of the present application. DETAILED DESCRIPTION

[0074] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings. Example embodiments, may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided as non-limiting examples so that this disclosure will be thorough and complete, and will fully convey the scope of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus description of the same will not be repeated.

[0075] It is to be understood that the terms "including", "comprising", "consisting" and "having" and variations thereof as used herein are meant to be inclusive and not restrictive; that is, the listed steps or components are optional and do not limit the examples described herein to only those steps or components. It is also to be understood that, as used herein, "and / or" means "and" or "or", or both.

[0076] As Figure 1 and Figure 2 ​As 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 limitations 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] likeFigure 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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