Relay

Abstract

Provided in the present disclosure is a relay, comprising a plurality of stationary contacts, a moving contact piece, and a breaking assembly. The moving contact piece is used for being in contact with or separated from the stationary contacts. The breaking assembly is located on the side of the moving contact piece facing away from the stationary contacts. The breaking assembly comprises an initiator and a breaking member; the initiator is configured to be activated to generate gas when the moving contact piece is in contact with the stationary contacts and a threshold current passes through the moving contact piece, and the gas can drive the breaking member to move, such that the breaking member breaks the moving contact piece from the side of the moving contact piece facing away from the stationary contacts.

Description

relay

[0001] This disclosure claims priority to Chinese Patent Application No. 202411896679.7, filed on December 20, 2024, the entire contents of which are incorporated herein by reference. Technical Field

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

[0003] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0004] 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. Summary of the Invention

[0005] This disclosure provides a relay to solve the problem in the related art where arcing caused by high current hinders disconnection.

[0006] The relay of this disclosure embodiment includes:

[0007] Multiple stationary contacts;

[0008] The moving contact is used to contact or separate from the stationary contact; and

[0009] A breaking assembly is located on the side of the moving contact facing away from the stationary contact. The breaking assembly includes an exciter and a breaking 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 breaking member to move so that the breaking member breaks the moving contact from the side of the moving contact facing away from the stationary contact.

[0010] According to some embodiments of this disclosure, the movable contact piece has a thinned portion, the thickness of which is less than the thickness of the rest of the movable contact piece; the thinned portion is configured to break when the punch impacts the movable contact piece.

[0011] According to some embodiments of this disclosure, 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.

[0012] According to some embodiments of this disclosure, the breaking member is positioned directly opposite the impacted portion along the direction of movement of the moving contact piece.

[0013] According to some embodiments of this disclosure, 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.

[0014] According to some embodiments of this disclosure, 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 covers the exciter.

[0015] According to some embodiments of this disclosure, 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.

[0016] 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.

[0017] The punched part is disposed on the body and contacts the side surface of the flange facing the stationary contact.

[0018] According to some embodiments of this disclosure, the relay further includes a yoke plate and a push rod assembly. The yoke plate has a through hole, and the push rod assembly 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.

[0019] 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.

[0020] According to some embodiments of this disclosure, 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;

[0021] 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.

[0022] According to some embodiments of this disclosure, the contact seat further includes a stop member, which is fixedly disposed on the side of the moving contact piece facing the stationary contact;

[0023] 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.

[0024] According to some embodiments of this disclosure, 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.

[0025] According to some embodiments of this disclosure, 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.

[0026] 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.

[0027] One embodiment disclosed above has at least the following advantages or beneficial effects:

[0028] In the relay of this 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 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 success rate and speed of relay circuit disconnection. Attached Figure Description

[0029] Figure 1 shows an exploded view of a relay according to an embodiment of the present disclosure.

[0030] Figure 2 shows a cross-sectional view of a relay according to an embodiment of the present disclosure.

[0031] Figure 3 shows a three-dimensional schematic diagram of the internal components.

[0032] Figure 4 shows an exploded view of the internal components.

[0033] Figure 5 shows a schematic diagram of the moving contact plate from one viewpoint.

[0034] Figure 6 shows a schematic diagram of the moving contact from another perspective.

[0035] Figure 7 shows a three-dimensional schematic diagram of the push rod and contact seat after assembly.

[0036] The reference numerals in the attached drawings are explained as follows: 100. Stationary contact; 200. Internal component; 210. Moving contact piece; 211. Thinned portion; 212. Impacted portion; 213. Second limiting portion; 220. Push rod component; 221. Push rod; 222. Contact seat; 222a. First clearance channel; 2221. Base; 2221a. First through hole; 2222. Spring seat; 2222a. Second through hole; 2223. Stop; 2223a. Second clearance channel; 2223b. Snap-fit ​​portion. ; 2224. First limiting part; 2225. Side plate; 2225a. Snap hole; 230. Elastic element; 300. Punch-off assembly; 310. Exciter; 311. Body; 312. Flange; 313. Signal line; 320. Punch-off part; 321. Cover; 322. Insulating impact part; 410. Insulating cover; 411. Top wall; 412. Side wall; 420. Yoke plate; 421. Slot; 422. Perforation; 423. Through hole; 430. Frame piece. Detailed Implementation

[0037] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0038] It is understood that the terms "comprising" and "having," and any variations thereof, used in the embodiments of this disclosure, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to such processes, methods, products, or apparatus.

[0039] As shown in Figures 1 and 2, the relay of 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 break-off assembly 300 is located on the side of the moving contact 210 facing away from the stationary contact 100. The break-off assembly 300 includes an exciter 310 and a break-off element 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 drives the break-off element 320 to move, causing the break-off element 320 to break the moving contact 210 from the side facing away from the stationary contact 100. Here, the threshold refers to the minimum or maximum limit required for an effect, state, or system to occur, change, or be initiated; it is also called a critical value or threshold threshold. When a quantity reaches or exceeds this specific value, it will switch from one state to another, or trigger a specific action. In this disclosure, the threshold current refers to the critical current; when the current exceeds this critical value, the exciter 310 will be activated to generate gas. The threshold current of the relay in this embodiment can be set to, for example, 15kA to 20kA. In other types of relays, the threshold current used to activate the exciter 310 is not limited to the above range and can be set according to different needs.

[0040] 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, improving the success rate and speed of relay circuit disconnection.

[0041] 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.

[0042] For example, the exciter 310 can be an electric detonator or an electric detonating tube, but is not limited thereto.

[0043] 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.

[0044] 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.

[0045] As shown in Figure 2, 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, and the moving contact 210 is located in this cavity.

[0046] 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.

[0047] 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.

[0048] As shown in Figure 2, 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 internal component 200, and the side wall 412 is located around the periphery of the internal 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.

[0049] The sidewall 412 can be a rectangular ring structure, a circular ring structure, or a ring structure of other shapes, and this disclosure does not make any special limitation in this regard.

[0050] As shown in Figures 2 and 5, 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.

[0051] 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 disclosure does not impose any particular limitation on this.

[0052] Furthermore, the cross-sectional shape of the groove can be U-shaped, V-shaped, etc., and this disclosure does not impose any particular limitation on it.

[0053] Please refer to Figures 2 and 5. The movable contact 210 has two thinned portions 211 arranged at intervals along the length 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.

[0054] In this embodiment of the present disclosure, 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 relay circuit disconnection.

[0055] 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.

[0056] Therefore, in this embodiment of the present disclosure, 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.

[0057] 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.

[0058] As shown in Figure 2, 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.

[0059] In this embodiment of the present disclosure, after 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.

[0060] 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.

[0061] In another embodiment, the insulating impact portion 322 may also be made entirely of an insulating material, such as ceramic or glass.

[0062] As shown in Figure 2, the exciter 310 is installed 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.

[0063] 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.

[0064] 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.

[0065] 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 disclosure.

[0066] As shown in Figures 3, 4, and 7, the internal component 200 also includes a push rod component 220 and an elastic element 230. The yoke plate 420 has a through hole 423 (as shown in Figure 1). The push rod component 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.

[0067] In this embodiment of the present disclosure, the plurality of stationary contacts 100 are divided into multiple pairs of stationary contacts 100, and the number of moving contact pieces 210 is also multiple, with the multiple moving contact pieces 210 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 first clearance channels 222a corresponds to one of the multiple breaking components 300.

[0068] In this embodiment of the present disclosure, 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.

[0069] It should be noted that the embodiments disclosed herein include multiple breaking components 300, and the actuator 310 of each breaking component 300 can be activated individually to break the moving contact 210 corresponding to that breaking component 300 without affecting other moving contact 210.

[0070] 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.

[0071] 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.

[0072] As shown in Figures 3 and 4, 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 of the present disclosure, 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.

[0073] As shown in Figures 2, 4 and 6, 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.

[0074] 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.

[0075] 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.

[0076] In summary, the relays of the present disclosure embodiments have at least the following advantages and beneficial effects:

[0077] 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, improving the success rate and speed of relay circuit disconnection.

[0078] It is understood that the various embodiments / implementations provided in this disclosure can be combined with each other without creating contradictions, and will not be described in detail here.

[0079] In the disclosed embodiments, 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 disclosed embodiments according to the specific circumstances.

[0080] In the description of the disclosed embodiments, 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 disclosed embodiments 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 disclosed embodiments.

[0081] 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 disclosed embodiments. 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.

[0082] The above are merely preferred embodiments of the disclosed embodiments and are not intended to limit the disclosed embodiments. For those skilled in the art, the disclosed embodiments can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the disclosed embodiments should be included within the protection scope of the disclosed embodiments.

Claims

1. A relay characterized by comprising: The relay comprises: a plurality of static contacts; a movable contact for contacting or separating from the static contacts; and a breaking assembly located on a side of the movable contact away from the static contacts; the breaking assembly comprises an initiator and a breaking member, the initiator is configured to be activated to generate gas when the movable contact contacts the static contacts and a threshold current passes through the movable contact, the gas is capable of driving the breaking member to move so as to break the movable contact from the side of the movable contact away from the static contacts by the breaking member. The movable contact has a thinned portion, the thickness of the thinned portion is less than the thickness of the rest of the movable contact; the thinned portion is configured to break when the breaking member impacts the movable contact.

2. The relay according to claim 1, characterized in that The movable contact has two thinned portions arranged at intervals along the length direction of the movable contact, and an impacted portion connected between the two thinned portions, the thinned portions are configured to break at least one of the two thinned portions when the breaking member impacts the impacted portion, so that at least one end of the impacted portion is separated from the movable contact.

3. The relay according to claim 2, characterized in that The breaking member is opposite to the impacted portion along the movement direction of the movable contact.

4. The relay according to claim 3, characterized in that The breaking member has an insulated impact portion, the insulated impact portion is configured to impact the impacted portion and to be inserted into the movable contact when the impacted portion is separated from the movable contact.

5. The relay of claim 3, wherein The relay further comprises a yoke plate, the initiator is arranged on a side of the yoke plate facing the static contacts, and the breaking member covers the initiator.

6. The relay of claim 1, wherein The side of the yoke plate facing the static contacts has a sink, the yoke plate further has a through hole penetrating the bottom surface of the sink and the surface of the yoke plate away from the static contacts; 7. The relay according to claim 6, characterized in that The initiator comprises a body, a flange connected to the peripheral surface of the body and located in the sink and connected to the bottom surface of the sink, and a signal line connected to the body and penetrating the through hole; The breaking member covers the body and contacts the surface of the flange facing the static contacts. The relay further comprises a yoke plate and a push rod member, the yoke plate has a through hole, the push rod member comprises a push rod movably penetrating the through hole and a contact seat connected to the push rod, and the movable contact is mounted on the contact seat; the breaking assembly is located on a side of the contact seat facing the yoke plate; 8. The relay of claim 1, wherein The contact seat has a first avoiding passage, part of the movable contact is exposed to the surface of the contact seat facing the yoke plate through the first avoiding passage, so that the breaking member can impact the movable contact through the first avoiding passage. The contact seat comprises a base connected to the push rod and a spring seat mounted on the base; the spring seat is provided with an elastic member for providing contact pressure; 9. The relay according to claim 8, characterized in that The base has a first through hole, the spring seat has a second through hole, the first through hole and the second through hole are in communication and form the first avoiding passage. The contact seat further comprises a stopper fixedly arranged on a side of the movable contact facing the static contacts; 10. The relay of claim 9, wherein ​ The stopper has a second avoiding passage, and a part of the movable contact is exposed to a side surface of the stopper away from the movable contact through the second avoiding passage.

11. The relay of claim 9, wherein The spring seat has a first limiting part, the movable contact has a second limiting part, and the two ends of the elastic member are respectively limited and matched with the first limiting part and the second limiting part.

12. The relay of claim 8, wherein, The plurality of static contacts are divided into a plurality of pairs of static contacts, the number of the movable contacts is a plurality, and the relay comprises a plurality of the breaking assemblies; one movable contact corresponds to one pair of static contacts, and the movable contact is used for contacting or separating from the corresponding pair of static contacts. The contact seat has a plurality of the first avoiding passages, and the plurality of the first avoiding passages correspond to the plurality of the movable contacts respectively, and the plurality of the first avoiding passages correspond to the plurality of the breaking assemblies respectively.

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