Relay

Abstract

The utility model discloses a relay. The relay comprises a shell, an internal component and an exciter, the shell is provided with a through hole, and the through hole penetrates through the inner wall surface and the outer wall surface of the shell; the internal component is movably arranged in the shell and is configured to switch the state of the relay from a closed state to an open state and from the open state to the closed state in response to an input signal; the exciter is arranged on the outer wall surface of the shell and seals the through hole; the exciter is configured to be activated to generate gas impact force when threshold current passes through the internal part, and the gas impact force can drive the internal part to move so that the relay can be switched from the closed state to the open state.

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. Utility Model Content

[0004] This application provides a relay to solve the problem in related technologies where arcing caused by high current hinders disconnection.

[0005] The relay in this application embodiment includes:

[0006] A housing having a through hole that penetrates both the inner and outer wall surfaces of the housing;

[0007] Internal components, movably disposed within the housing, are configured to switch the state of the relay from a closed state to an open state and from an open state to a closed state in response to an input signal; and

[0008] An exciter is mounted on the outer wall of the housing and seals the through hole; the exciter is configured to be activated to generate a gas impact force when a threshold current passes through the internal component, the gas impact force driving the internal component to move, thereby switching the relay from the closed state to the open state.

[0009] According to some embodiments of this application, at least a portion of the exciter is located within the through hole.

[0010] According to some embodiments of this application, the exciter is mounted on the outer wall of the housing via an adapter.

[0011] According to some embodiments of this application, the adapter includes an adapter sleeve and an adapter flange. One axial end of the adapter sleeve is connected to the outer wall surface of the housing, and the adapter flange is connected to the other axial end of the adapter sleeve and protrudes from the outer peripheral side of the adapter sleeve.

[0012] The exciter includes a body and an overlapping part. The body is inserted into the adapter sleeve, and the overlapping part is connected to the outer peripheral side of the body and overlaps the side surface of the adapter flange facing away from the housing.

[0013] According to some embodiments of this application, the adapter is made of plastic or wood.

[0014] According to some embodiments of this application, the inner wall surface of the housing is provided with an extension, and the through hole penetrates the extension;

[0015] The internal components include a push rod member and a pressure receiving member. The pressure receiving member is connected to one end of the push rod member near the through hole. The pressure receiving member is configured to be driven by the gas impact force to move the push rod member when the exciter is activated to generate a gas impact force.

[0016] When the relay is in the closed state, the pressure-bearing component, the extension, and the exciter form a gas storage chamber.

[0017] According to some embodiments of this application, the pressure-bearing member includes:

[0018] Base;

[0019] A side portion, connected to the edge of the base, and extending from the base toward the vicinity of the exciter; and

[0020] A connecting portion, connected to the base and / or the side portion, and connected to the push rod member;

[0021] When the relay is in the closed state, the base covers the through hole, and the side covers the outer periphery of the extension.

[0022] According to some embodiments of this application, the pressure-bearing member further includes a protrusion that protrudes from the side surface of the base facing the extension;

[0023] When the relay is in the closed state, the protrusion extends into the through hole.

[0024] According to some embodiments of this application, the push rod member has a slot, and the connecting portion is detachably inserted into the slot.

[0025] According to some embodiments of this application, the slot wall has a slot, and the connecting part has a locking block for engaging with the slot.

[0026] According to some embodiments of this application, at least one of the surfaces of the base and the extension facing each other is provided with a sealing element;

[0027] When the relay is in the closed state, the seal is sandwiched between the base and the extension.

[0028] According to some embodiments of this application, the housing includes an insulating cover, the insulating cover being equipped with a stationary contact; when the relay is in a closed state, the internal component is in contact with the stationary contact, and when the relay is in an open state, the internal component is separated from the stationary contact;

[0029] The insulating cover includes a top wall and a side wall connected to each other. The top wall is located at one end of the internal component, and the side wall is located on the periphery of the internal component. The through hole penetrates the inner and outer wall surfaces of the top wall, and the exciter is mounted on the top wall.

[0030] According to some embodiments of this application, the relay further includes multiple pairs of stationary contacts;

[0031] The internal components include a push rod component and a plurality of spaced movable contact pieces mounted on the push rod component, wherein the plurality of movable contact pieces are used to contact or separate from the plurality of pairs of stationary contacts respectively;

[0032] When the relay is in the closed state, the moving contact is in contact with the stationary contact; when the relay is in the open state, the moving contact is separated from the stationary contact.

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

[0034] The relay of this embodiment includes a housing, internal components, and an exciter. When a threshold current passes through the internal components, the exciter is activated, generating a gas impact force. This gas impact force drives the internal components to move, switching the relay from a closed state to an open state. Thus, the exciter acts as a "fuse," promptly disconnecting the relay when a threshold current passes through the internal components, which improves the anti-sticking properties of the moving and stationary contacts and enables rapid arc extinguishing. Furthermore, the exciter is mounted on the outer wall of the housing and seals the through-hole of the housing. On the one hand, this allows for easier assembly by having workers operate from outside the housing, providing more operating space; on the other hand, since the exciter is mounted on the outer wall of the housing and not inside, it does not occupy internal space, facilitating miniaturization of the relay design. Attached Figure Description

[0035] Figure 1 The diagram shown is an exploded view of a relay according to an embodiment of this application.

[0036] Figure 2 The diagram shown is a cross-sectional view of a relay according to an embodiment of this application.

[0037] Figure 3 The diagram shown is an exploded view of the internal components.

[0038] Figure 4 The diagram shown is a three-dimensional schematic of the pressure-bearing component.

[0039] Figure 5 The diagram shows a seal between the extension and the base.

[0040] The reference numerals in the attached figures are explained as follows:

[0041] 100. Shell

[0042] 101. Through hole

[0043] 102. Extension

[0044] 103. Gas storage chamber

[0045] 110. Insulating cover

[0046] 111. Top Wall

[0047] 112. Sidewall

[0048] 120. Frame piece

[0049] 130. Yoke plate

[0050] 140. Metal Cover

[0051] 200. Stationary contact

[0052] 300. Internal components

[0053] 310. Push rod components

[0054] 311, Slot

[0055] 3111, Card Slot

[0056] 320. Pressure-bearing components

[0057] 321. Base

[0058] 322. Side

[0059] 323. Connecting part

[0060] 3231, Card Block

[0061] 324. Protrusion

[0062] 330. Moving contact plate

[0063] 340. Elastic components

[0064] 400. Seals

[0065] 500, Exciter

[0066] 510. Ontology

[0067] 520. Overlap section

[0068] 600, Adapter

[0069] 610. Adapter sleeve

[0070] 620. Adapter flange Detailed Implementation

[0071] 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.

[0072] 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.

[0073] like Figure 1 and Figure 2 As shown, the relay in this embodiment includes a housing 100, an internal component 300, and an actuator 500. The housing 100 has a through hole 101 that penetrates the inner and outer walls of the housing 100. The internal component 300 is movably disposed within the housing 100 and configured to switch the state of the relay from a closed state to an open state and from an open state to a closed state in response to an input signal. The actuator 500 is mounted on the outer wall of the housing 100 and seals the through hole 101. The actuator 500 is configured to be activated when a threshold current passes through the internal component 300, generating a gas impact force that drives the internal component 300 to move, thereby switching the relay from a closed state to an open state.

[0074] The relay of this embodiment includes a housing 100, an internal component 300, and an exciter 500. When a threshold current passes through the internal component 300, the exciter 500 is activated, generating a gas impact force. This gas impact force drives the internal component 300 to move, causing the relay to switch from a closed state to an open state. Thus, the exciter 500 acts as a "fuse," promptly disconnecting the relay when a threshold current passes through the internal component 300, which helps improve the anti-sticking properties of the moving and stationary contacts and achieves rapid arc extinguishing. Furthermore, the exciter 500 is mounted on the outer wall of the housing 100 and seals the through-hole 101 of the housing 100. On the one hand, when assembling the exciter 500, the operator can operate from outside the housing 100, providing more operating space and facilitating assembly. On the other hand, since the exciter 500 is mounted on the outer wall of the housing 100 and not inside the housing 100, it does not occupy internal space, which is beneficial for achieving a miniaturized relay design.

[0075] In one embodiment, the igniter 500 may include gunpowder. When a threshold current passes through the internal component 300, the gunpowder is ignited and generates a large amount of gas, forming a gas impact force. This gas impact force can drive the internal component 300 to move, causing the relay to switch from a closed state to an open state.

[0076] For example, the exciter 500 can be an electric detonator or an electric detonating tube, but is not limited to this.

[0077] Furthermore, for threshold current monitoring, a Hall effect sensor can be used to monitor the magnetic field strength near the moving and stationary contacts to detect the current value passing through the internal component 300. Based on the correlation between magnetic field strength and current value, the current value can be derived from the magnetic field strength.

[0078] 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 internal component 300 in the current loop.

[0079] Please continue reading. Figure 1 and Figure 2 The housing 100 is an airtight housing. This airtight construction helps prevent arcing between adjacent conductive elements in the relay and helps provide electrical isolation between moving and stationary contacts.

[0080] The housing 100 may include an insulating cover 110, a frame 120, a yoke plate 130, and a metal cover 140. The insulating cover 110 and the frame 120 are located on one side of the thickness direction of the yoke plate 130, and the metal cover 140 is located on the other side of the thickness direction of the yoke plate 130.

[0081] In one embodiment, the insulating cover 110 is made of ceramic material and is connected to the yoke plate 130 via a frame plate 120. The frame plate 120 can be a ring-shaped metal part, such as an iron-nickel alloy. One end of the frame plate 120 is connected to the opening edge of the insulating cover 110, for example, by laser welding, brazing, resistance welding, or adhesive bonding. The other end of the frame plate 120 is connected to the yoke plate 130, also by laser welding, brazing, resistance welding, or adhesive bonding. The frame plate 120 is provided between the insulating cover 110 and the yoke plate 130 to facilitate the connection between them.

[0082] The insulating cover 110 includes a top wall 111 and a side wall 112. The top wall 111 is located at one end of the internal component 300, and the side wall 112 is located around the periphery of the internal component 300. A stationary contact 200 is mounted on the top wall 111. When the relay is in the closed state, the internal component 300 is in contact with the stationary contact 200; when the relay is in the open state, the internal component 300 is separated from the stationary contact 200. One end of the side wall 112 is connected to the edge of the top wall 111, and the other end of the side wall 112 is connected to the yoke plate 130 through a frame plate 120.

[0083] The sidewall 112 can be a rectangular ring structure, a circular ring structure, or a ring structure of other shapes. This application does not make any special limitation on this.

[0084] In one embodiment, the top wall 111 has a through hole 101 that penetrates the inner and outer wall surfaces of the top wall 111, and the exciter 500 is installed on the top wall 111.

[0085] like Figure 2 As shown, at least a portion of the actuator 500 is located within the through-hole 101. When the actuator 500 is activated to generate a gas impact force, since at least a portion of the actuator 500 is located within the through-hole 101, the gas impact force can act on the internal component 300 more quickly, causing the relay to switch from a closed state to an open state quickly, thus improving the breaking efficiency.

[0086] like Figure 2 As shown, the exciter 500 is mounted on the outer wall surface of the top wall 111 of the insulating cover 110 via the adapter 600.

[0087] In this embodiment of the application, the exciter 500 is connected to the insulating cover 110 via the adapter 600 but is not directly connected to the insulating cover 110, which can prevent the heat generated when the relay is working from being transferred to the exciter 500 and causing the exciter 500 to be falsely triggered.

[0088] The adapter 600 can be made of a material with poor thermal conductivity, such as plastic or wood, which can further prevent the heat from the insulating cover 110 from being transferred to the exciter 500.

[0089] In one embodiment, the adapter 600 includes an adapter sleeve 610 and an adapter flange 620. One axial end of the adapter sleeve 610 is connected to the outer wall surface of the housing 100, and the adapter flange 620 is connected to the other axial end of the adapter sleeve 610 and protrudes from the outer peripheral side surface of the adapter sleeve 610. The actuator 500 includes a body 510 and an overlapping portion 520. The body 510 passes through the adapter sleeve 610, and the overlapping portion 520 is connected to the outer peripheral side surface of the body 510 and overlaps the side surface of the adapter flange 620 facing away from the housing 100. The body 510 contains gunpowder.

[0090] In another embodiment, the adapter 600 may also include only an adapter sleeve 610, one axial end of which is connected to the top wall 111 of the insulating cover 110, and the other end is connected to the exciter 500.

[0091] In another embodiment, a transition flange 620 is provided at each of the two axial ends of the adapter sleeve 610, one of the transition flanges 620 is connected to the top wall 111 of the insulating cover 110, and the other transition flange 620 is connected to the exciter 500.

[0092] It is understood that the adapter 600 and the insulating cover 110, as well as the adapter 600 and the exciter 500, can be connected by welding, gluing, or other methods, and this application does not impose any special restrictions on this.

[0093] like Figure 2 and Figure 3 As shown, the internal component 300 includes a push rod member 310, a moving contact 330, and an elastic element 340. The moving contact 330 is mounted on the push rod member 310 and is used to contact or separate from the stationary contact 200. The elastic element 340 is used to provide contact pressure to the moving contact 330. Specifically, when the relay is in the closed state, the moving contact 330 is in contact with the stationary contact 200; when the relay is in the open state, the moving contact 330 is separated from the stationary contact 200.

[0094] like Figure 1 and Figure 3 As shown, the relay also includes multiple pairs of stationary contacts 200. The internal component 300 includes multiple elastic elements 340 and multiple spaced-apart moving contacts 330. The moving contacts 330 are mounted on the push rod component 310 and are used to contact or separate from the multiple pairs of stationary contacts 200 respectively. The multiple elastic elements 340 correspond to the multiple moving contacts 330 respectively. Each moving contact 330 corresponds to a pair of stationary contacts 200. When the relay is in the closed state, the multiple moving contacts 330 are in contact with the multiple pairs of stationary contacts 200; when the relay is in the open state, the multiple moving contacts 330 are separated from the multiple pairs of stationary contacts 200.

[0095] In the embodiments of this application, multiple moving contacts 330 are mounted on the same push rod component 310, and each moving contact 330 corresponds to a pair of stationary contacts 200. When the push rod component 310 moves, multiple moving contacts 330 move simultaneously, thereby achieving the effect of "single-drive multiple-action", which is conducive to the miniaturization and integration of the relay size, and at the same time reduces the cost of the product to a certain extent.

[0096] like Figure 2 and Figure 3 As shown, the inner wall surface of the top wall 111 of the insulating cover 110 is provided with an extension 102, and the through hole 101 passes through the extension 102. The internal component 300 also includes a pressure receiving member 320, which is connected to one end of the push rod member 310 near the through hole 101. The pressure receiving member 320 is configured to be driven by the gas impact force to move the push rod member 310 when the exciter 500 is activated and generates a gas impact force. When the relay is in the closed state, the pressure receiving member 320, the extension 102 and the exciter 500 form a gas storage chamber 103.

[0097] In this embodiment of the application, the internal component 300 also includes a pressure-receiving component 320. When the relay is in the closed state, the pressure-receiving component 320, the extension 102 and the exciter 500 form a gas storage chamber 103. The gas generated after the exciter 500 is activated first gathers in the gas storage chamber 103. Compared with the volume of the insulating cover 110, the volume of the gas storage chamber 103 is smaller, which is more conducive to the gas forming a larger impact force, thereby enabling the relay to quickly switch to the open state.

[0098] like Figure 3 and Figure 4 As shown, the pressure-bearing member 320 includes a base 321, a side portion 322, and a connecting portion 323. The side portion 322 is connected to the edge of the base 321 and extends from the base 321 toward the vicinity of the actuator 500; the connecting portion 323 is connected to the base 321 and / or the side portion 322 and is connected to the push rod member 310; wherein, when the relay is in the closed state, the base 321 covers the through hole 101, and the side portion 322 covers the outer periphery of the extension 102.

[0099] In this embodiment, the side portion 322 is connected to the edge of the base portion 321 and extends from the base portion 321 toward the vicinity of the exciter 500. The side portion 322 and the base portion 321 are roughly in a "bowl" shape. When the relay is in the closed state, the base portion 321 covers the through hole 101, and the side portion 322 covers the outer periphery of the extension portion 102. This is beneficial for the pressure-bearing member 320 to cover the through hole 101, thereby making the gas storage chamber 103 form a relatively sealed space, which is more conducive to the gas generated by the exciter 500 forming a larger impact force.

[0100] The pressure-bearing component 320 also includes a protrusion 324, which protrudes from the surface of the base 321 facing the extension 102; when the relay is in the closed state, the protrusion 324 extends into the through hole 101. The protrusion 324 extending into the through hole 101 can further compress the space of the gas storage chamber 103, which is beneficial to achieving the effect of accumulating gas in a smaller space to generate a larger impact force.

[0101] like Figure 3 As shown, the push rod member 310 has a slot 311, and the connecting part 323 is detachably inserted into the slot 311. In one embodiment, the slot wall of the slot 311 has a groove 3111, and the connecting part 323 has a locking block 3231 for engaging into the groove 3111.

[0102] like Figure 5 As shown, at least one of the surfaces of the base 321 and the extension 102 facing each other is provided with a seal 400; when the relay is in the closed state, the seal 400 is sandwiched between the base 321 and the extension 102.

[0103] In the embodiments of this application, when the relay is in the closed state, the seal 400 can seal between the base 321 and the extension 102, and the space inside the through hole 101 is basically formed into an airtight space, which is more conducive to the gas generated by the exciter 500 forming a larger impact force to drive the internal component 300 to move, so as to realize the relay switching from the closed state to the open state.

[0104] In summary, the relays of the embodiments of this application have at least the following advantages and beneficial effects:

[0105] The relay of this embodiment includes a housing 100, an internal component 300, and an exciter 500. When a threshold current passes through the internal component 300, the exciter 500 is activated, generating a gas impact force. This gas impact force drives the internal component 300 to move, causing the relay to switch from a closed state to an open state. Thus, the exciter 500 acts as a "fuse," promptly disconnecting the relay when a threshold current passes through the internal component 300, which helps improve the anti-sticking properties of the moving and stationary contacts and achieves rapid arc extinguishing. Furthermore, the exciter 500 is mounted on the outer wall of the housing 100 and seals the through-hole 101 of the housing 100. On the one hand, this allows for easier operation by personnel outside the housing 100 during assembly, providing more operating space and facilitating assembly. On the other hand, since the exciter 500 is mounted on the outer wall of the housing 100 and not inside, it does not occupy internal space, which is beneficial for miniaturizing the relay design.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A relay, characterized in that, include: A housing having a through hole that penetrates both the inner and outer wall surfaces of the housing; Internal components are movably disposed within the housing and configured to switch the state of the relay from a closed state to an open state and from an open state to a closed state in response to an input signal; as well as An exciter is mounted on the outer wall of the housing and seals the through hole; the exciter is configured to be activated to generate a gas impact force when a threshold current passes through the internal component, the gas impact force driving the internal component to move, thereby switching the relay from the closed state to the open state.

2. The relay according to claim 1, characterized in that, At least a portion of the exciter is located within the through hole.

3. The relay according to claim 1 or 2, characterized in that, The exciter is mounted on the outer wall of the housing via an adapter.

4. The relay according to claim 3, characterized in that, The adapter includes an adapter sleeve and an adapter flange. One axial end of the adapter sleeve is connected to the outer wall surface of the housing, and the adapter flange is connected to the other axial end of the adapter sleeve and protrudes from the outer peripheral side of the adapter sleeve. The exciter includes a body and an overlapping part. The body is inserted into the adapter sleeve, and the overlapping part is connected to the outer peripheral side of the body and overlaps the side surface of the adapter flange facing away from the housing.

5. The relay according to claim 3, characterized in that, The adapter is made of plastic or wood.

6. The relay according to claim 1, characterized in that, The inner wall surface of the housing is provided with an extension, and the through hole penetrates the extension; The internal components include a push rod member and a pressure receiving member. The pressure receiving member is connected to one end of the push rod member near the through hole. The pressure receiving member is configured to be driven by the gas impact force to move the push rod member when the exciter is activated to generate a gas impact force. When the relay is in the closed state, the pressure-bearing component, the extension, and the exciter form a gas storage chamber.

7. The relay according to claim 6, characterized in that, The pressure-bearing component includes: Base; A side portion, connected to the edge of the base, and extending from the base toward the vicinity of the exciter; and A connecting portion, connected to the base and / or the side portion, and connected to the push rod member; When the relay is in the closed state, the base covers the through hole, and the side covers the outer periphery of the extension.

8. The relay according to claim 7, characterized in that, The pressure-bearing member further includes a protrusion that protrudes from the side surface of the base facing the extension. When the relay is in the closed state, the protrusion extends into the through hole.

9. The relay according to claim 7, characterized in that, The push rod component has a slot, and the connecting part is detachably inserted into the slot.

10. The relay according to claim 9, characterized in that, The slot wall has a slot, and the connecting part has a locking block for engaging with the slot.

11. The relay according to claim 7, characterized in that, At least one of the surfaces of the base and the extension facing each other is provided with a sealing element; When the relay is in the closed state, the seal is sandwiched between the base and the extension.

12. The relay according to claim 1, characterized in that, The housing includes an insulating cover, which is equipped with a stationary contact; when the relay is in the closed state, the internal components are in contact with the stationary contact, and when the relay is in the open state, the internal components are separated from the stationary contact. The insulating cover includes a top wall and a side wall connected to each other. The top wall is located at one end of the internal component, and the side wall is located on the periphery of the internal component. The through hole penetrates the inner and outer wall surfaces of the top wall, and the exciter is mounted on the top wall.

13. The relay according to claim 12, characterized in that, The relay also includes multiple pairs of stationary contacts; The internal components include a push rod component and a plurality of spaced movable contact pieces mounted on the push rod component, wherein the plurality of movable contact pieces are used to contact or separate from the plurality of pairs of stationary contacts respectively; When the relay is in the closed state, the moving contact is in contact with the stationary contact; when the relay is in the open state, the moving contact is separated from the stationary contact.

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