Relay

Abstract

The utility model discloses a relay. The relay comprises a plurality of static contacts, a movable contact piece and a thrust component, the moving contact piece is used for contacting with or separating from the static contact. The thrusting assembly is located on the side, opposite to the static contact, of the movable contact piece. The thrusting assembly comprises an exciter and a thrusting piece, the exciter is configured to be activated to generate gas when the moving contact is in contact with the static contact and threshold current passes through the moving contact, and the gas can drive the thrusting piece to move, so that the thrusting piece thrusts off the moving contact from the side, opposite to the static contact, of the moving contact.

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. However, when the load to be 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 not conducive 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] Multiple stationary contacts;

[0007] The moving contact piece is used to contact or separate from the stationary contact; and

[0008] A break-off assembly is located on the side of the moving contact facing away from the stationary contact. The break-off assembly includes an exciter and a break-off member. The exciter is configured to be activated to generate gas when the moving contact contacts the stationary contact and a threshold current passes through the moving contact. The gas can drive the break-off member to move so that the break-off member breaks the moving contact from the side of the moving contact facing away from the stationary contact.

[0009] According to some embodiments of this application, the movable contact has a thinned portion, the thickness of which is less than the thickness of the rest of the movable contact; the thinned portion is configured to break when the punch impacts the movable contact.

[0010] According to some embodiments of this application, the movable contact has two thinning portions spaced apart along the length of the movable contact, and an impacted portion connected between the two thinning portions. The thinning portions are configured such that when the breaking member impacts the impacted portion, at least one of the two thinning portions breaks, so that at least one end of the impacted portion detaches from the movable contact.

[0011] According to some embodiments of this application, the punching member is positioned directly opposite the impacted portion along the direction of movement of the moving contact piece.

[0012] According to some embodiments of this application, the punching member has an insulating impact portion configured to impact the impacted portion and to insert into the moving contact piece after the impacted portion disengages from the moving contact piece.

[0013] According to some embodiments of this application, the relay further includes a yoke plate, the exciter is mounted on the side of the yoke plate facing the stationary contact, and the breakout member is covered by the exciter.

[0014] According to some embodiments of this application, the yoke plate has a groove on the side facing the stationary contact, and the yoke plate also has a through hole that penetrates the bottom surface of the groove and the surface of the yoke plate on the side facing away from the stationary contact.

[0015] The exciter includes a body, a flange, and a signal line. The flange is connected to the peripheral surface of the body and is located in the sink, and is connected to the bottom surface of the sink. The signal line is connected to the body and passes through the through hole.

[0016] The punched part is disposed on the body and contacts the side surface of the flange facing the stationary contact.

[0017] According to some embodiments of this application, the relay further includes a yoke plate and a push rod component. The yoke plate has a through hole, and the push rod component includes a push rod and a contact seat. The push rod is movably disposed within the through hole, and the contact seat is connected to the push rod. The movable contact piece is mounted on the contact seat. The break-off assembly is located on the side of the contact seat facing the yoke plate.

[0018] The contact seat has a first clearance channel, through which a portion of the moving contact piece is exposed on the side surface of the contact seat facing the yoke plate, so that the punch can impact the moving contact piece through the first clearance channel.

[0019] According to some embodiments of this application, the contact seat includes a base and a spring seat, the base being connected to the push rod, and the spring seat being mounted on the base; the spring seat is provided with an elastic element for providing contact pressure;

[0020] The base has a first through hole, and the spring seat has a second through hole. The first through hole and the second through hole communicate with each other and form the first clearance channel.

[0021] According to some embodiments of this application, the contact seat further includes a stop member, which is fixedly disposed on the side of the moving contact piece facing the stationary contact;

[0022] The stop member has a second clearance channel, through which a portion of the movable contact piece is exposed on the side surface of the stop member opposite to the movable contact piece.

[0023] According to some embodiments of this application, the spring seat has a first limiting portion, the movable contact piece has a second limiting portion, and the two ends of the elastic member are respectively limited and engaged with the first limiting portion and the second limiting portion.

[0024] According to some embodiments of this application, the plurality of stationary contacts are divided into multiple pairs of stationary contacts, the number of moving contact pieces is multiple, and the relay includes multiple breaking components; one moving contact piece corresponds to a pair of stationary contacts, and the moving contact piece is used to contact or separate from the corresponding pair of stationary contacts.

[0025] The contact seat has a plurality of first clearance channels, each of which corresponds to a plurality of moving contact pieces and a plurality of breaking components.

[0026] An embodiment of the above application has at least the following advantages or beneficial effects:

[0027] In the relay of this application embodiment, when the moving contact contacts the stationary contact and a threshold current passes through the moving contact, the exciter is activated to generate gas, which in turn drives the breaking member to break the moving contact, thereby disconnecting the relay circuit and achieving the purpose of relay disconnection. Furthermore, since the breaking member impacts the moving contact from the side of the moving contact facing away from the stationary contact, when the breaking member contacts the moving contact, the moving contact is not only subjected to the impact force of the breaking member, but also to the reaction force of the stationary contact. Therefore, when the breaking member impacts the moving contact, the rigid contact between the breaking member and the moving contact is more conducive to breaking the moving contact, improving the efficiency of relay circuit disconnection. Attached Figure Description

[0028] Figure 1 The diagram shown is an exploded view of a relay according to an embodiment of this application.

[0029] Figure 2 The diagram shown is a cross-sectional view of a relay according to an embodiment of this application.

[0030] Figure 3 The diagram shown is a three-dimensional representation of the internal components.

[0031] Figure 4 The diagram shown is an exploded view of the internal components.

[0032] Figure 5 The diagram shown is a schematic of the movable contact piece from one viewpoint.

[0033] Figure 6 This is a schematic diagram of the moving contact from another perspective.

[0034] Figure 7 The diagram shown is a three-dimensional representation of the assembled push rod and contact seat.

[0035] The reference numerals in the attached figures are explained as follows:

[0036] 100. Static contact

[0037] 200. Internal components

[0038] 210. Moving contact plate

[0039] 211. Thinning section

[0040] 212. Impacted part

[0041] 213. Second limiting part

[0042] 220. Push rod components

[0043] 221. Push rod

[0044] 222. Contactor base

[0045] 222a, First Avoidance Lane

[0046] 2221. Base

[0047] 2221a, First through hole

[0048] 2222, Spring seat

[0049] 2222a, Second through hole

[0050] 2223. Stop component

[0051] 2223a, Second Escape Lane

[0052] 2223b, Connecting part

[0053] 2224. First limiting part

[0054] 2225, Side Panel

[0055] 2225a, SIM card slot

[0056] 230. Elastic component

[0057] 300, punching component

[0058] 310. Exciter

[0059] 311. Ontology

[0060] 312. Flange

[0061] 313. Signal line

[0062] 320. Punched parts

[0063] 321. Cover

[0064] 322. Insulating Impact Part

[0065] 410. Insulating cover

[0066] 411. Top Wall

[0067] 412. Sidewall

[0068] 420. Yoke plate

[0069] 421. Settling Tank

[0070] 422. Perforation

[0071] 423. Via

[0072] 430. Frame Detailed Implementation

[0073] 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.

[0074] 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.

[0075] like Figure 1 and Figure 2As shown, the relay in this embodiment includes a plurality of stationary contacts 100, an internal component 200, and a tripping assembly 300. The internal component 200 is 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 internal component 200 includes a moving contact 210, which is used to contact or separate from the stationary contacts 100. Specifically, when the relay is in the closed state, the moving contact 210 is in contact with the stationary contacts 100; when the relay is in the open state, the moving contact 210 is separated from the stationary contacts 100. The breaking assembly 300 is located on the side of the moving contact 210 facing away from the stationary contact 100. The breaking assembly 300 includes an exciter 310 and a breaking member 320. The exciter 310 is configured to be activated to generate gas when the moving contact 210 contacts the stationary contact 100 and a threshold current passes through the moving contact 210. The gas can drive the breaking member 320 to move so that the breaking member 320 breaks the moving contact 210 from the side of the moving contact 210 facing away from the stationary contact 100.

[0076] In this embodiment of the relay, when the moving contact 210 contacts the stationary contact 100 and a threshold current passes through the moving contact 210, the exciter 310 is activated to generate gas, which in turn drives the breaking member 320 to break the moving contact 210, thereby disconnecting the relay circuit and achieving the purpose of relay disconnection. Furthermore, since the breaking member 320 impacts the moving contact 210 from the side of the moving contact 210 facing away from the stationary contact 100, when the breaking member 320 contacts the moving contact 210, the moving contact 210 is not only subjected to the impact force of the breaking member 320, but also to the reaction force of the stationary contact 100. Therefore, when the breaking member 320 impacts the moving contact 210, the rigid contact between the breaking member 320 and the moving contact 210 is more conducive to the breaking member 320 breaking the moving contact 210, thus improving the efficiency of relay circuit disconnection.

[0077] In one embodiment, the igniter 310 may include gunpowder. When the threshold current passes through the moving contact 210, the gunpowder is ignited and generates a large amount of gas. The gas can drive the breaking member 320 to move, thereby breaking the moving contact 210.

[0078] For example, the exciter 310 can be an electric detonator or an electric detonating tube, but is not limited thereto.

[0079] 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 moving contact 210. Based on the correlation between magnetic field strength and current value, the current value can be derived from the magnetic field strength.

[0080] 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 210 in the current loop.

[0081] like Figure 2 As shown, the relay also includes an insulating cover 410, a frame plate 430, and a yoke plate 420. The insulating cover 410 and the frame plate 430 are located on one side of the thickness direction of the yoke plate 420. The insulating cover 410 is connected to the yoke plate 420 through the frame plate 430. The insulating cover 410, the frame plate 430, and the yoke plate 420 form a cavity, in which the moving contact 210 is located.

[0082] As an example, the stationary contact 100 is mounted on the insulating cover 410, and the breaking assembly 300 is mounted on the yoke plate 420.

[0083] In one embodiment, the insulating cover 410 is made of ceramic material, and the frame plate 430 can be a ring-shaped metal part, such as an iron-nickel alloy. One end of the frame plate 430 is connected to the edge of the opening of the insulating cover 410, for example, by laser welding, brazing, resistance welding, or adhesive bonding. The other end of the frame plate 430 is connected to the yoke plate 420, also by laser welding, brazing, resistance welding, or adhesive bonding. The frame plate 430 is provided between the insulating cover 410 and the yoke plate 420 to facilitate the connection between them.

[0084] like Figure 2 As shown, the insulating cover 410 includes a top wall 411 and a side wall 412. The top wall 411 is located at one end of the inner component 200, and the side wall 412 is located around the periphery of the inner component 200. The top wall 411 is equipped with a stationary contact 100. One end of the side wall 412 is connected to the edge of the top wall 411, and the other end of the side wall 412 is connected to the yoke plate 420 through a frame plate 430.

[0085] The sidewall 412 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.

[0086] like Figure 2 and Figure 5 As shown, the moving contact 210 has a thinned portion 211, the thickness of which is less than the thickness of the rest of the moving contact 210. The thinned portion 211 is configured to break when the breaking member 320 impacts the moving contact 210. Because the moving contact 210 has a thinned portion 211, it is more likely to break when the breaking member 320 impacts the moving contact 210, thereby disconnecting the relay circuit and achieving the purpose of disconnection.

[0087] It is understood that the thinned portion 211 can be formed by machining grooves on both sides of the moving contact piece 210 in the thickness direction. For example, grooves can be machined on one side of the moving contact piece 210 in the thickness direction or on both sides. When grooves are machined on both sides of the moving contact piece 210 in the thickness direction, the positions of the two grooves correspond in the thickness direction of the moving contact piece 210. The grooves can be formed by stamping, milling, etc., and this application does not make any particular limitation on this.

[0088] Furthermore, the cross-sectional shape of the groove can be U-shaped, V-shaped, etc., and this application does not impose any particular limitation on it.

[0089] Please continue reading. Figure 2 and Figure 5 As shown, the movable contact 210 has two thinned portions 211 arranged at intervals along the length direction of the movable contact 210, and an impacted portion 212 connected between the two thinned portions 211. The thinned portions 211 are configured such that when the breaking member 320 impacts the impacted portion 212, at least one of the two thinned portions 211 breaks, so that at least one end of the impacted portion 212 is detached from the movable contact 210.

[0090] In this embodiment of the application, the impact force of the punching member 320 acts directly on the impacted part 212. Since thinning parts 211 are provided on both sides of the impacted part 212, when the impacted part 212 is subjected to the impact force of the punching member 320, at least one of the two thinning parts 211 will break, causing the impacted part 212 to detach from the moving contact piece 210 and realize the disconnection of the relay circuit.

[0091] It should be noted that if the punching member 320 acts on the middle position of the impacted part 212 along the length direction of the moving contact piece 210, the thinned parts 211 on both sides of the impacted part 212 will break; if the punching member 320 acts on the impacted part 212 at a position close to one of the thinned parts 211 and far away from the other thinned part 211, the thinned part 211 that is closer to the punching member 320 is more likely to break.

[0092] Therefore, in the embodiments of this application, when the punching member 320 acts on the impacted part 212, it can punch the moving contact piece 210 to break (for example, only one thinned part 211 breaks, or both thinned parts 211 break at the same time), avoiding the problem that the moving contact piece 210 cannot be punched due to the offset of the position of the punching member 320 acting on the moving contact piece 210, thus improving the fault tolerance rate.

[0093] In one embodiment, the breaking member 320 is positioned directly opposite the impacted portion 212 along the direction of movement of the movable contact 210. In other words, the breaking member 320 is located directly below the impacted portion 212. During breaking, the breaking member 320 can move from the yoke plate 420 to the movable contact 210 along the shortest distance, avoiding the problem of reduced impact force due to the breaking member 320 moving a longer distance.

[0094] like Figure 2 As shown, the punching member 320 has a cover portion 321 and an insulating impact portion 322. The cover portion 321 covers the exciter 310, and the insulating impact portion 322 is connected to the cover portion 321. The insulating impact portion 322 is configured to impact the impacted portion 212, and after the impacted portion 212 disengages from the moving contact 210, it is inserted into the moving contact 210.

[0095] In the embodiments of this application, when the impacted part 212 is disengaged from the moving contact piece 210, the insulating impacted part 322 is inserted into the moving contact piece 210, which can disconnect the moving contacts at both ends of the moving contact piece 210.

[0096] In one embodiment, the insulating impact part 322 may include two parts, one part being an impact head that is integrally formed with the cover part 321, and the other part being an insulating coating that is applied to the outer surface of the impact head to achieve the purpose of insulation.

[0097] In another embodiment, the insulating impact portion 322 may also be made entirely of an insulating material, such as ceramic or glass.

[0098] like Figure 2 As shown, the exciter 310 is mounted on the side of the yoke plate 420 facing the stationary contact 100, and the cover 321 of the punch 320 covers the exciter 310.

[0099] The yoke plate 420 has a groove 421 on the side facing the stationary contact 100. The yoke plate 420 also has a through hole 422, which penetrates the bottom surface of the groove 421 and the surface of the yoke plate 420 facing away from the stationary contact 100. The actuator 310 includes a body 311, a flange 312, and a signal line 313. The flange 312 is connected to the peripheral surface of the body 311 and is located in the groove 421, and is connected to the bottom surface of the groove 421. The signal line 313 is connected to the body 311 and passes through the through hole 422. The cover 321 of the punch 320 covers the body 311 and contacts the surface of the flange 312 facing the stationary contact 100.

[0100] The cover 321 covers the body 311 and contacts the side surface of the flange 312 facing the stationary contact 100. When the gunpowder inside the body 311 is activated, it can instantly generate a large amount of gas, which rushes into the narrow cover 321, thereby driving the punch 320 to move toward the moving contact 210.

[0101] In one embodiment, the flange 312 and the yoke plate 420 can be connected by welding, riveting, gluing or other methods, which are not limited in this application.

[0102] like Figure 3 , Figure 4 and Figure 7 As shown, the internal component 200 also includes a push rod member 220 and an elastic element 230, and the yoke plate 420 has a through hole 423 (e.g., Figure 1 The push rod assembly 220 includes a push rod 221 and a contact seat 222. The push rod 221 is movably inserted into the through hole 423. The contact seat 222 is connected to the push rod 221. The movable contact piece 210 is mounted on the contact seat 222. The elastic element 230 is mounted on the contact seat 222 to provide contact pressure. The breaking assembly 300 is located on the side of the contact seat 222 facing the yoke plate 420. The contact seat 222 has a first clearance channel 222a. The impacted portion 212 of the movable contact piece 210 is exposed on the surface of the contact seat 222 facing the yoke plate 420 through the first clearance channel 222a, so that the breaking member 320 can impact the movable contact piece 210 through the first clearance channel 222a.

[0103] In this embodiment, multiple stationary contacts 100 are divided into multiple pairs of stationary contacts 100, and multiple moving contact pieces 210 are mounted on the contact base 222. One moving contact piece 210 corresponds to one pair of stationary contacts 100, and the moving contact piece 210 is used to contact or separate from the corresponding pair of stationary contacts 100. The relay includes multiple breaking components 300; the contact base 222 has multiple first clearance channels 222a, each of which corresponds to one of the multiple moving contact pieces 210 and each of the multiple breaking components 300.

[0104] In the embodiments of this application, multiple moving contacts 210 are mounted on the same push rod component 220, and each moving contact 210 corresponds to a pair of stationary contacts 100. When the push rod component 220 moves, multiple moving contacts 210 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.

[0105] It should be noted that the embodiments of this application include multiple breaking components 300. The exciter 310 of each breaking component 300 can be activated individually to break the moving contact 210 corresponding to the breaking component 300 without affecting other moving contact 210.

[0106] In one embodiment, the contact seat 222 includes a base 2221 and a plurality of spring seats 2222. The base 2221 is connected to the push rod 221, and the spring seats 2222 are mounted on the base 2221. The base 2221 has a first through hole 2221a, and the spring seats 2222 have a second through hole 2222a. The first through hole 2221a and the second through hole 2222a communicate with each other and form a first clearance channel 222a.

[0107] The contact base 222 also includes multiple pairs of side plates 2225 and multiple stops 2223. The multiple pairs of side plates 2225 are connected to the base 2221, and a spring seat 2222 and a moving contact piece 210 are provided between each pair of side plates 2225. The stops 2223 are fixedly disposed on the side of the moving contact piece 210 facing the stationary contact 100 and are connected to a pair of side plates 2225. For example, the two ends of the stops 2223 have snap-fit ​​portions 2223b, and each side plate 2225 has a snap-fit ​​hole 2225a. The two snap-fit ​​portions 2223b of the stops 2223 are respectively snapped into the snap-fit ​​holes 2225a of a pair of side plates 2225.

[0108] like Figure 3 and Figure 4 As shown, the stop member 2223 has a second clearance channel 2223a, through which a portion of the movable contact piece 210 is exposed on the side surface of the stop member 2223 opposite to the movable contact piece 210. In this embodiment, the impacted portion 212 of the movable contact piece 210 is exposed on the side surface of the stop member 2223 opposite to the movable contact piece 210 through the second clearance channel 2223a.

[0109] like Figure 2 , Figure 4 and Figure 6 As shown, the spring seat 2222 has a first limiting part 2224, the movable contact piece 210 has a second limiting part 213, and the two ends of the elastic member 230 are respectively limited and engaged with the first limiting part 2224 and the second limiting part 213.

[0110] In one embodiment, the first limiting portion 2224 and the second limiting portion 213 can be protrusions or grooves. Specifically, the first limiting portion 2224 and the second limiting portion 213 can both be protrusions or both be grooves; or, one of the first limiting portion 2224 and the second limiting portion 213 can be a protrusion and the other can be a groove.

[0111] In one embodiment, the elastic element 230 can be a spring. The protrusion can be inserted into the spring, and one end of the spring can be accommodated in a groove.

[0112] In summary, the relays of the embodiments of this application have at least the following advantages and beneficial effects:

[0113] In this embodiment of the relay, when the moving contact 210 contacts the stationary contact 100 and a threshold current passes through the moving contact 210, the exciter 310 is activated to generate gas, which in turn drives the breaking member 320 to break the moving contact 210, thereby disconnecting the relay circuit and achieving the purpose of relay disconnection. Furthermore, since the breaking member 320 impacts the moving contact 210 from the side of the moving contact 210 facing away from the stationary contact 100, when the breaking member 320 contacts the moving contact 210, the moving contact 210 is not only subjected to the impact force of the breaking member 320, but also to the reaction force of the stationary contact 100. Therefore, when the breaking member 320 impacts the moving contact 210, the rigid contact between the breaking member 320 and the moving contact 210 is more conducive to the breaking member 320 breaking the moving contact 210, thus improving the efficiency of relay circuit disconnection.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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: Multiple stationary contacts; The moving contact piece is used to contact or separate from the stationary contact piece; as well as The breaking assembly is located on the side of the moving contact that faces away from the stationary contact; The breaking assembly includes an exciter and a breaking member. The exciter is configured to generate gas when the moving contact contacts the stationary contact and a threshold current passes through the moving contact. The gas drives the breaking member to move so that the breaking member breaks the moving contact from the side of the moving contact away from the stationary contact.

2. The relay according to claim 1, characterized in that, The movable contact has a thinned portion, the thickness of which is less than the thickness of the rest of the movable contact; the thinned portion is configured to break when the punch impacts the movable contact.

3. The relay according to claim 2, characterized in that, The movable contact has two thinning portions spaced apart along the length of the movable contact, and an impacted portion connected between the two thinning portions. The thinning portions are configured such that when the breaking member impacts the impacted portion, at least one of the two thinning portions breaks, so that at least one end of the impacted portion detaches from the movable contact.

4. The relay according to claim 3, characterized in that, Along the direction of movement of the moving contact piece, the breaking member is directly opposite the impacted part.

5. The relay according to claim 3, characterized in that, The punching member has an insulating impact portion configured to impact the impacted portion and insert into the moving contact piece after the impacted portion disengages from the moving contact piece.

6. The relay according to claim 1, characterized in that, The relay also includes a yoke plate, the exciter is mounted on the side of the yoke plate facing the stationary contact, and the break-off member is covered by the exciter.

7. The relay according to claim 6, characterized in that, The yoke plate has a groove on the side facing the stationary contact, and the yoke plate also has a through hole that penetrates the bottom surface of the groove and the surface of the yoke plate on the side away from the stationary contact. The exciter includes a body, a flange, and a signal line. The flange is connected to the peripheral surface of the body and is located in the sink, and is connected to the bottom surface of the sink. The signal line is connected to the body and passes through the through hole. The punched part is disposed on the body and contacts the side surface of the flange facing the stationary contact.

8. The relay according to claim 1, characterized in that, The relay further includes a yoke plate and a push rod assembly. The yoke plate has a through hole. The push rod assembly includes a push rod and a contact seat. The push rod is movably inserted into the through hole. The contact seat is connected to the push rod. The moving contact piece is mounted on the contact seat. The break-off assembly is located on the side of the contact seat facing the yoke plate. The contact seat has a first clearance channel, through which a portion of the moving contact piece is exposed on the side surface of the contact seat facing the yoke plate, so that the punch can impact the moving contact piece through the first clearance channel.

9. The relay according to claim 8, characterized in that, The contact seat includes a base and a spring seat, the base being connected to the push rod, and the spring seat being mounted on the base; the spring seat is provided with an elastic element for providing contact pressure; The base has a first through hole, and the spring seat has a second through hole. The first through hole and the second through hole communicate with each other and form the first clearance channel.

10. The relay according to claim 9, characterized in that, The contact seat also includes a stop member, which is fixedly disposed on the side of the moving contact piece facing the stationary contact; The stop member has a second clearance channel, through which a portion of the movable contact piece is exposed on the side surface of the stop member opposite to the movable contact piece.

11. The relay according to claim 9, characterized in that, The spring seat has a first limiting part, the movable contact piece has a second limiting part, and the two ends of the elastic member are respectively limited and engaged with the first limiting part and the second limiting part.

12. The relay according to claim 8, characterized in that, The multiple stationary contacts are divided into multiple pairs of stationary contacts, and the number of moving contact pieces is multiple. The relay includes multiple breaking components; one moving contact piece corresponds to a pair of stationary contacts, and the moving contact piece is used to contact or separate from the corresponding pair of stationary contacts. The contact seat has a plurality of first clearance channels, each of which corresponds to a plurality of moving contact pieces and a plurality of breaking components.

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