WO2024078418A1 - Relay - Google Patents

Abstract

A relay comprising a contact container (1), a contact assembly (2) and an anti-short circuit assembly (3), wherein the contact container (1) comprises an insulating cover (11); the contact assembly (2) comprises a movable elastic piece (22) and a pair of static contact lead-out ends (21), the static contact lead-out ends (21) at least partially extending into the insulating cover (11), and the movable elastic piece (22) being arranged in the insulating cover (11); the anti-short circuit assembly (3) comprises an upper magnetically conductive magnet (31) and a lower magnetically conductive magnet (32), and a magnetically conductive loop can be formed between the upper magnetically conductive magnet (31) and the lower magnetically conductive magnet (32), such that when the movable elastic piece (22) experiences a large fault current, an attraction force is generated and is used for resisting an electric repulsive force between the movable elastic piece (22) and the static contact lead-out ends (21); the upper magnetically conductive magnet (31) is provided with a fixed mounting foot (311) fixedly connected to the inner wall of the top of the insulating cover (11), such that a gap (312) is provided between the upper magnetically conductive magnet (31) and the inner wall of the top of the insulating cover (11).

Description

A relay

The present disclosure claims priority to Chinese patent application number 202222687629.0, filed on October 12, 2022, and entitled “A Relay”, the entire contents of which are incorporated herein by reference in their entirety.

Technical Field

The present disclosure relates to the technical field of electric power appliances, and in particular to a relay.

Background technique

As the requirements for the cruising range of new energy vehicles increase, the heat loss of high-voltage DC relays is required to be reduced under normal circumstances. When the battery pack is short-circuited, the battery capacity is higher, and the short-circuit current and voltage of the relay are required to be further increased. When the short-circuit load is large, the contacts of the high-voltage DC relay will bounce open due to the electromotive repulsion generated by the short-circuit current, and then the contacts will arc. Since the load short-circuit current and voltage are both very high, it will cause violent arcing between the contacts in an instant.

The prior art usually sets a follow-up anti-short-circuit ring electromagnetic structure in the moving component. When the short-circuit current generates an electric repulsion force, the upper conductive magnet in the anti-short-circuit ring electromagnetic structure generates an electromagnetic attraction to the lower conductive magnet, and fixes the lower conductive magnet and the moving contact piece together, thereby ensuring that the moving contact does not bounce. Since the support of the moving component needs to rely on the holding force of the moving iron core, and the holding force is maintained by the electromagnetic force generated by the coil being energized, if the power consumption of the coil is limited, the holding force is limited, and the holding force used to support the anti-short-circuit ring is also limited. Therefore, when the short-circuit current reaches a certain preset value, the lower conductive magnet will also generate an electromagnetic attraction to the upper conductive magnet. When the holding force of the iron core cannot support the electromagnetic attraction of the lower yoke iron to the upper conductive magnet, the contact will still bounce.

In order to solve this problem, the only way currently is to enlarge the size of the coil to improve the holding force of the moving iron core. However, a larger coil will increase the overall volume of the relay, which is not conducive to the demand for lightweight relays.

Utility Model Content

The embodiments of the present disclosure provide a relay that meets the requirements of safety and lightness.

According to one aspect of the present disclosure, there is provided a relay, comprising:

contact containers, including insulating covers;

A contact assembly, comprising a moving reed and a pair of stationary contact lead-out terminals, wherein the stationary contact lead-out terminals are arranged on the insulating cover, the stationary contact lead-out terminals at least partially extend into the insulating cover, the moving reed is arranged in the insulating cover, and the moving reed is used to contact or separate from the pair of stationary contact lead-out terminals;

An anti-short circuit assembly, comprising an upper conductive magnet and a lower conductive magnet, wherein the upper conductive magnet is arranged on the top inner wall of the insulating cover, and the lower conductive magnet is fixed to the bottom of the movable spring piece, and the upper conductive magnet and the lower conductive magnet are used to form a magnetic conductive loop to generate an attractive force when a large fault current occurs in the movable spring piece, so as to resist the electric repulsion between the movable spring piece and the static contact lead-out end;

The upper conductive magnet is provided with a fixed mounting foot, and the fixed mounting foot is fixedly connected to the top inner wall of the insulating cover so that a gap is provided between the upper conductive magnet and the top inner wall of the insulating cover.

According to an embodiment of the present disclosure, the insulating cover is a ceramic cover, a metallized area is provided on the top inner wall of the ceramic cover corresponding to the position of the fixed mounting foot, and the fixed mounting foot is welded to the ceramic cover through the metallized area.

According to an embodiment of the present disclosure, the relay further comprises a driving assembly, the driving assembly comprises a push rod unit, the push rod unit is capable of driving the moving reed to move in a direction close to the static contact lead-out end;

Wherein, the movable spring sheet and the lower conductive magnet form a movable component, and the movable component and the push rod unit are matched through a limiting protrusion and a limiting hole.

According to one embodiment of the present disclosure, the lower conductive magnet includes a magnet body and two side plates, the two side plates are respectively arranged on both sides of the magnet body, and the push rod unit is provided with two baffles toward the direction of the supporting part; wherein the baffles and the side plates are matched through limiting protrusions and limiting holes.

According to one embodiment of the present disclosure, the movable component also includes a supporting portion, which is arranged between the push rod unit and the lower conductive magnet, the supporting portion and the lower conductive magnet are fixedly connected, and the push rod unit and the supporting portion cooperate through the limiting protrusion and the limiting hole to drive the movable spring to move.

According to an embodiment of the present disclosure, the driving assembly further includes an elastic member, one end of the elastic member abuts against the push rod unit, and the other end of the elastic member abuts against the movable member.

According to an embodiment of the present disclosure, the support portion is a U-shaped bracket, the open end of the U-shaped bracket is arranged toward the push rod unit, and two side arms of the U-shaped bracket are used to limit the elastic member;

Wherein, the side arm of the U-shaped bracket and the push rod unit are matched through a limiting protrusion and a limiting hole.

According to an embodiment of the present disclosure, the support portion is a fixed sheet, and the push rod unit is provided with a baffle in a direction toward the support portion, and the baffle is used to limit the elastic member;

Wherein, the baffle and the fixing plate cooperate with each other through a limiting protrusion and a limiting hole.

According to an embodiment of the present disclosure, the upper conductive magnet is a straight-line structure, and the upper conductive magnet extends along the width direction of the movable spring piece; and/or,

The lower conductive magnet is a U-shaped structure, the opening of the lower conductive magnet is arranged toward the movable spring piece, and the parts of the lower conductive magnet located on both sides of the movable spring piece in the width direction can abut against the upper conductive magnet.

According to one embodiment of the present disclosure, the insulating cover comprises:

A ceramic plate, wherein the metallized area is disposed on a side of the ceramic plate close to the upper magnet;

An insulating support portion, located below the ceramic plate and used to support the ceramic plate;

Wherein, the ceramic plate and the insulating support part are split structures.

According to an embodiment of the present disclosure, a metallized portion is provided on a side of the ceramic plate away from the upper conductive magnet, and the metallized portion is used to connect the static contact lead-out terminal.

According to an embodiment of the present disclosure, the ceramic plate is provided with a metallization structure corresponding to the insulating support portion, and the metallization structure is used to connect at least a portion of the insulating support portion.

According to one embodiment of the present disclosure, the insulating support portion includes:

A surrounding frame, located below the ceramic plate and used to support the ceramic plate, wherein the surrounding frame is connected to the metallized structure;

An insulating frame is arranged in the surrounding frame, and the insulating frame is connected to the ceramic board.

According to an embodiment of the present disclosure, the insulating frame is bonded to the ceramic board.

According to an embodiment of the present disclosure, the insulating support portion includes a ceramic frame and a surrounding frame, one end of the ceramic frame is connected to the surrounding frame, and the other end is connected to the metallization structure of the ceramic board, and the surrounding frame supports the ceramic board.

According to an embodiment of the present disclosure, the metallization structure and the metallization area are located in the same horizontal plane.

An embodiment of the present disclosure has at least the following advantages or beneficial effects:

The relay of the disclosed embodiment includes an insulating cover through a contact container, a static contact lead-out terminal is arranged on the insulating cover, the insulating cover provides a fixed position for the static contact lead-out terminal, a moving reed is arranged in the insulating cover, the static contact lead-out terminal at least partially extends into the insulating cover, and the insulating cover provides an insulating environment for the moving reed and at least part of the static contact lead-out terminal of the contact assembly. The moving reed is used to contact or separate with a pair of static contact lead-out terminals. When the moving reed contacts the static contacts at the bottom of the pair of static contact lead-out terminals, current flows into one static contact lead-out terminal and flows out from the other static contact lead-out terminal after passing through the moving reed, thereby connecting the load.

By placing the lower conductive magnet below the moving spring, the lower conductive magnet can move with the moving spring toward the direction close to the static contact lead-out end. After the moving spring and the static contact lead-out end are in contact, the moving spring can no longer move upward. The lower conductive magnet can move toward the direction close to the upper conductive magnet, so that a magnetic conductive circuit can be formed between the upper conductive magnet and the lower conductive magnet. When a large fault current occurs in the moving spring, the upper conductive magnet is arranged above the moving spring and the lower conductive magnet is arranged below the moving spring, which is equivalent to the moving spring being sandwiched between the upper conductive magnet and the lower conductive magnet. When the upper conductive magnet generates suction force on the lower conductive magnet, the suction force plays a role in attracting and pulling the moving spring, and is used to resist the electric repulsion force generated by the fault current between the moving spring and the static contact lead-out end, so as to avoid the situation that the moving spring and the static contact lead-out end are separated from each other and cause arcing explosion, thereby ensuring the reliability and safety of the contact between the moving spring and the static contact lead-out end.

By setting the upper conductive magnet on the top inner wall of the insulating cover, that is, the upper conductive magnet is fixed at a fixed position above the inner cavity of the insulating cover, so that the upper conductive magnet and the lower conductive magnet in the anti-short circuit component form a magnetic circuit and the electromagnetic attraction generated is transferred from acting on the driving component to a fixed and static position, eliminating the risk of the moving iron core being disengaged and the relay being burned or exploded under the action of a strong electric arc. At this time, the upper conductive magnet adopts a fixed structure, and the insulating cover plays the role of carrying the upper conductive magnet, so that the driving component does not need to bear the attraction of the lower conductive magnet on the upper conductive magnet when the upper short circuit occurs, and a large coil is not required to meet the holding force requirements, thereby meeting the requirements of lightweight relays.

The upper conductive magnet is provided with a fixed mounting foot so that the entire upper conductive magnet does not fit into the top interior of the insulating cover. The gap between the upper conductive magnet and the top inner wall of the insulating cover is utilized to increase the creepage distance between the two static contact lead-out terminals to ensure the insulation creepage distance requirement.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features and advantages of the present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

FIG1 is a schematic structural diagram of a relay according to a first embodiment of the present disclosure;

FIG2 shows a top view of a relay according to a first embodiment of the present disclosure;

FIG3 shows a cross-sectional view of A-A in FIG2 ;

FIG4 shows an exploded view of a relay according to the first embodiment of the present disclosure;

FIG5 is a schematic diagram showing a working state of a relay according to the first embodiment of the present disclosure;

FIG6 is a schematic diagram showing the structure of a relay according to a second embodiment of the present disclosure;

FIG7 shows a top view of a relay according to a second embodiment of the present disclosure;

FIG8 shows a cross-sectional view taken along line B-B in FIG7 ;

FIG9 shows an exploded view of a relay according to a second embodiment of the present disclosure;

FIG10 shows a cross-sectional view of a relay according to a third embodiment of the present disclosure;

FIG11 is a schematic diagram showing the structure of a relay according to a third embodiment of the present disclosure;

FIG12 shows an exploded view of a relay according to a third embodiment of the present disclosure;

FIG13 is a schematic diagram showing the structure of a relay according to a fourth embodiment of the present disclosure;

FIG14 shows a top view of a relay according to a fourth embodiment of the present disclosure;

FIG15 shows a cross-sectional view of C-C in FIG13 ;

FIG16 shows an exploded view of a relay according to a fourth embodiment of the present disclosure;

FIG17 is a schematic diagram showing the structure of a relay according to a fifth embodiment of the present disclosure;

FIG18 shows a top view of a relay according to a fifth embodiment of the present disclosure;

FIG19 shows a cross-sectional view taken along line D-D in FIG18 ;

FIG. 20 is an exploded view of a relay according to a fifth embodiment of the present disclosure.

The reference numerals are described as follows:

1. Contact container; 2. Contact assembly; 3. Anti-short circuit assembly; 4. Driving assembly; 5. Connector;

11. Insulation cover; 111. Ceramic plate; 112. Insulation support portion; 1121. Surrounding frame; 1122. Insulation frame; 1123. Ceramic frame; 12. Yoke iron plate;

21. Static contact lead-out terminal; 22. Moving reed;

31. upper conductive magnet; 311. fixed mounting foot; 312. gap; 32. lower conductive magnet;

41. push rod unit; 411. push rod; 412. mounting seat; 413. limiting protrusion;

42. Supporting part; 421. Baffle; 422. Limiting hole;

43. Elastic parts;

44. Electromagnet unit; 441. Coil frame; 442. Coil; 443. Moving iron core.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to enable the present disclosure to be The present invention will be comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

Embodiment 1

As shown in Figures 1-4, Figure 1 shows a schematic diagram of the structure of the relay of the first embodiment of the present disclosure; Figure 2 shows a top view of the relay of the first embodiment of the present disclosure; Figure 3 shows a cross-sectional view of A-A in Figure 2; Figure 4 shows an exploded view of the relay of the first embodiment of the present disclosure.

The present embodiment provides a relay, which includes a contact container 1, a contact assembly 2, and an anti-short circuit assembly 3. The contact container 1 includes an insulating cover 11. The contact assembly 2 includes a movable spring 22 and a pair of static contact lead-out terminals 21. The static contact lead-out terminals 21 are arranged on the insulating cover 11. The static contact lead-out terminals 21 at least partially extend into the insulating cover 11. The movable spring 22 is arranged in the insulating cover 11. The movable spring 22 is used to contact or separate from the pair of static contact lead-out terminals 21.

The relay of the disclosed embodiment includes an insulating cover 11 through a contact container 1, a static contact lead-out terminal 21 is arranged on the insulating cover 11, and the insulating cover 11 provides a fixed position for the static contact lead-out terminal 21. The movable spring piece 22 is arranged in the insulating cover 11, and the static contact lead-out terminal 21 at least partially extends into the insulating cover 11, and the insulating cover 11 provides an insulating environment for the movable spring piece 22 and at least part of the static contact lead-out terminal 21 of the contact assembly 2. The movable spring piece 22 is used to contact or separate with a pair of static contact lead-out terminals 21. When the movable spring piece 22 contacts the static contacts at the bottom of the pair of static contact lead-out terminals 21, the current flows into one static contact lead-out terminal 21, and flows out from the other static contact lead-out terminal 21 after passing through the movable spring piece 22, thereby connecting the load.

When the short-circuit load is large, under the action of the short-circuit current, an electric repulsion force will be generated between the moving reed 22 and the static contact lead-out terminal 21, causing the contacts to pop open, resulting in arcing of the contacts and violent burning, and even possible explosion. To this end, the relay provided in this embodiment also includes an anti-short-circuit component 3, which includes an upper conductive magnet 31 and a lower conductive magnet 32, and the lower conductive magnet 32 is fixed to the bottom of the moving reed 22. The upper conductive magnet 31 and the lower conductive magnet 32 are used to form a magnetic conductive loop to generate suction when a large fault current occurs in the moving reed 22, and are used to resist the electric repulsion force between the moving reed 22 and the static contact lead-out terminal 21. The upper conductive magnet 31 and the lower conductive magnet 32 can be made of materials such as iron, cobalt, nickel and their alloys.

The lower conductive magnet 32 is fixed to the lower side of the moving spring 22, and the lower conductive magnet 32 can move with the moving spring 22 toward the direction close to the static contact lead-out terminal 21. The lower conductive magnet 32 can move toward the direction close to the upper conductive magnet 31, so that a magnetic conductive circuit can be formed between the upper conductive magnet 31 and the lower conductive magnet 32. When a large fault current occurs in the moving spring 22, the upper conductive magnet 31 is arranged above the moving spring 22, and the lower conductive magnet 32 is arranged below the moving spring 22, which is equivalent to the moving spring 22 being sandwiched between the upper conductive magnet 31 and the lower conductive magnet 32. When the upper conductive magnet 31 generates suction force on the lower conductive magnet 32, the suction force plays a role in attracting and pulling the moving spring 22, and is used to resist the electromotive repulsion force generated by the fault current between the moving spring 22 and the static contact lead-out terminal 21, so as to avoid the situation that the moving spring 22 and the static contact lead-out terminal 21 are separated from each other and cause arc explosion, thereby ensuring the reliability and safety of the contact between the moving spring 22 and the static contact lead-out terminal 21.

It should be noted that the relay further includes a driving assembly 4, which includes a push rod unit 41. The push rod unit 41 can drive the anti-short circuit assembly 3 to move relative to the insulating cover 11 toward the direction close to the static contact lead-out terminal 21. The push rod unit 41 is partially arranged in the insulating cover 11 and is movably arranged relative to the insulating cover 11. The push rod unit 41 provides power for the movable spring piece 22 to push the movable spring piece 22 to move, thereby realizing the contact and separation between the movable spring piece 22 and the static contact lead-out terminal 21.

If the upper conductive magnet 31 and the lower conductive magnet 32 are both movable, the upper conductive magnet 31 and the lower conductive magnet 32 need to be supported by the holding force of the driving component 4. If the holding force cannot support the suction force of the lower conductive magnet 32 on the upper conductive magnet 31, the upper conductive magnet 31 and the lower conductive magnet 32 will still fall and cause the movable spring 22 and the static contact lead-out terminal 21 to separate. The existing method is to increase the size of the coil 442 of the driving component 4 to achieve the purpose of increasing the holding force, but the larger coil 442 is difficult to meet the requirements of lightweight.

To this end, as shown in FIG. 3-FIG . 4 , in the relay provided in this embodiment, the upper conductive magnet 31 is disposed on the top inner wall of the insulating cover 11 .

By setting the upper conductive magnet 31 on the top inner wall of the insulating cover 11, that is, the upper conductive magnet 31 is fixed at a fixed position above the inner cavity of the insulating cover 11, so that the upper conductive magnet 31 and the lower conductive magnet 32 in the anti-short circuit component 3 form a magnetic circuit and the electromagnetic attraction generated is transferred from acting on the driving component 4 to a fixed and static position, eliminating the risk of the moving iron core 443 being disengaged and the relay being burned or exploded under the action of a strong electric arc. At this time, the upper conductive magnet 31 adopts a fixed structure, and the insulating cover 11 plays the role of carrying the upper conductive magnet 31, so that the driving component 4 does not need to bear the attraction of the lower conductive magnet 32 on the upper conductive magnet 31 during a short circuit, and does not need a large-sized coil 442 to meet the retention force requirements, thereby meeting the requirements of lightweight relays.

If the upper conductive magnet 31 and the top inner wall of the insulating cover 11 are directly welded, a large welding stress will be generated, and if the upper conductive magnet 31 and the top inner wall of the insulating cover 11 are directly attached, the distance between the upper conductive magnet 31 and the static contact lead-out terminal 21 is relatively close, and it is difficult to ensure the requirements of withstand voltage and safety distance. For this reason, the upper conductive magnet 31 provided in this embodiment is provided with a fixed mounting foot 311, which is configured to be fixedly connected to the top inner wall of the insulating cover 11, so that a gap 312 is provided between the upper conductive magnet 31 and the top inner wall of the insulating cover 11.

The upper conductive magnet 31 is provided with a fixed mounting foot 311 so that the entire upper conductive magnet 31 does not fit into the top inner part of the insulating cover 11. The gap 312 between the upper conductive magnet 31 and the top inner wall of the insulating cover 11 is utilized to increase the creepage distance between the two static contact lead-out terminals 21 to ensure the insulation creepage distance requirement.

In one embodiment, the insulating cover 11 is a ceramic cover, and a metallized area is provided on the top inner wall of the ceramic cover corresponding to the fixed mounting foot 311, and the fixed mounting foot 311 is welded to the ceramic cover through the metallized area.

A metallized area is provided on the top inner wall of the insulating cover 11 corresponding to the fixed mounting foot 311 to achieve regional metallization of the portion of the insulating cover 11 corresponding to the fixed mounting foot 311, thereby reducing welding stress and ensuring the fixing effect between the fixed mounting foot 311 and the insulating cover 11.

The movable spring piece 22 can be in a straight shape, and along the length direction of the movable spring piece 22, under the action of the driving assembly 4, the two ends of the movable spring piece 22 can respectively contact the two static contact lead-out terminals 21, thereby realizing the connection of the load. The bottom of the static contact lead-out terminal 21 serves as a static contact, and the two ends of the movable spring piece 22 along its length direction can serve as movable contacts. The movable contacts at both ends of the movable spring piece 22 can protrude from other parts of the movable spring piece 22, or can be flush with other parts.

It can be understood that the static contact can be integrally or separately arranged at the bottom of the static contact lead-out end 21, and the moving contact can be integrally or separately arranged at both ends of the moving spring piece 22 along its length direction.

Two static contact lead-out terminals 21 are arranged on the insulating cover 11, for example, on the top of the insulating cover 11. Moreover, one end of each static contact lead-out terminal 21 extends into the contact chamber of the insulating cover 11, and the other end protrudes from the outer surface of the shell. The end of the static contact lead-out terminal 21 extending into the contact chamber is used to contact the moving spring 22.

In this embodiment, as shown in Figures 3-4, the upper conductive magnet 31 is a straight-line structure, and the upper conductive magnet 31 extends along the width direction of the movable spring piece 22; and/or, the lower conductive magnet 32 is a U-shaped structure, and the opening of the lower conductive magnet 32 is arranged toward the movable spring piece 22, and the parts of the lower conductive magnet 32 located on both sides of the width direction of the movable spring piece 22 can abut against the upper conductive magnet 31.

By setting the upper conductive magnet 31 to be a straight-line structure, the upper conductive magnet 31 is correspondingly set at a position between the two moving contacts of the moving spring piece 22, that is, directly above the push rod unit 41. The upper conductive magnet 31 extends along the width direction of the moving spring piece 22 to match and correspond to the upper conductive magnet 31 and the lower conductive magnet 32.

By setting the lower conductive magnet 32 to be a U-shaped structure, the opening of the lower conductive magnet 32 is set toward the moving spring piece 22, so that the two side arms of the lower conductive magnet 32 extend in the direction of the upper conductive magnet 31, so that the two side arms of the upper conductive magnet 31 can be close to or contact each other with the two ends of the upper conductive magnet 31, respectively, so as to form a surrounding magnetic conductive ring along the width of the moving spring piece 22. Since the two ends of the moving spring piece 22 along the length direction are moving contacts, the surrounding magnetic conductive ring formed along the width direction of the moving spring piece 22 will not interfere, and when a large fault current occurs in the moving spring piece 22, an electromagnetic attraction in the pressure direction of the moving contact is generated to resist the electric repulsion generated by the fault current between the moving spring piece 22 and the static contact lead-out terminal 21.

It should be noted that the relay of the embodiment of the present disclosure may include a shell, and the contact container 1, the contact assembly 2, the anti-short circuit assembly 3 and the drive assembly 4 are arranged in the shell, and the shell plays the role of containing and protecting. The shell may also not be included, and these components may be assembled and directly installed in the application product, such as a battery pack or an electrical control box.

It should be noted that the housing has a hollow chamber which is communicated with the outside of the housing. The contact container 1 is disposed in the hollow chamber and includes an insulating cover 11 and a yoke plate 12 which enclose a contact chamber.

In one embodiment, the movable spring piece 22 and the lower conductive magnet 32 form a movable member, and the movable member and the push rod unit 41 cooperate with each other through the limiting protrusion 413 and the limiting hole 422. Under the mutual cooperation of the limiting protrusion 413 and the limiting hole 422, the moving force of the push rod unit 41 can be transmitted to the movable member, so that the movable spring piece 22 is used to contact or separate with a pair of static contact lead-out terminals 21.

In this embodiment, as shown in Figures 3-4, the movable component also includes a support portion 42, which is fixedly connected to the lower conductive magnet 32. The support portion 42 is arranged between the push rod unit 41 and the lower conductive magnet 32. The push rod unit 41 and the support portion 42 cooperate with each other through the limiting protrusion 413 and the limiting hole 422 to drive the movable spring 22 to move.

It should be particularly noted that the limiting hole 422 can be a through hole structure, or a blind hole structure, or a groove structure, etc.

The support part 42 is disposed between the push rod unit 41 and the lower conductive magnet 32, and the support part 42 serves as an intermediate connection between the push rod 411 assembly and the lower conductive magnet 32. The support part 42 is fixedly connected to the lower conductive magnet 32, and serves to carry the lower conductive magnet 32, so as to ensure the supporting effect of the lower conductive magnet 32. Under the mutual cooperation of the limiting protrusion 413 and the limiting hole 422, the moving force of the push rod unit 41 can be transmitted to the support part 42, which is used to drive the moving spring piece 22 to move, so that the moving spring piece 22 can be used to contact or separate with a pair of static contact lead-out terminals 21.

It should be noted that a first connecting hole is provided in the movable spring piece 22, a second connecting hole is provided in the lower conductive magnet 32 corresponding to the first connecting hole, a third connecting hole is provided in the support portion 42 corresponding to the second connecting hole, and the connecting member 5 is specifically a bolt, a rivet, a connecting pin, etc. The connecting member 5 is respectively passed through the first connecting hole, the second connecting hole and the third connecting hole to ensure the connection stability between the movable spring piece 22, the lower conductive magnet 32 and the support portion 42.

In this embodiment, as shown in FIG. 3-4, the driving assembly 4 further includes an elastic member 43, which is disposed between the support portion 42 and the push rod unit 41, and one end of the elastic member 43 abuts against the push rod unit 41, and the other end abuts against the movable member. Specifically, the other end of the elastic member 43 abuts against the support portion 42, or the other end of the elastic member 43 passes through the support portion 42 and abuts against the lower conductive magnet 32.

The elastic member 43 is specifically a component with elasticity and reset function, such as a spring. If one end of the elastic member 43 abuts against the push rod unit 41 and the other end abuts against the movable component, the push rod unit 41 pushes the lower conductive magnet 32 to move in a direction close to the upper conductive magnet 31 through the support portion 42 and the elastic member 43; if one end of the elastic member 43 abuts against the push rod unit 41 and the other end passes through the support portion 42 and abuts against the lower conductive magnet 32, a through hole is provided in the middle of the support portion 42, and a mounting groove is provided at the bottom of the lower conductive magnet 32, so that the other end of the elastic member 43 passes through the through hole and is fixed in the mounting groove, the push rod unit 41 can push the lower conductive magnet 32 to move in a direction close to the upper conductive magnet 31 through the elastic member 43.

In this embodiment, as shown in FIG. 3-4, the push rod unit 41 includes a push rod 411 and a mounting seat 412. The top of the push rod 411 is fixed to the mounting seat 412. The push rod 411 provides power for moving relative to the insulating cover 11, and the mounting seat 412 is used to install the spring. Specifically, a positioning column and a positioning groove are arranged at the center of the mounting seat 412. The positioning groove is arranged around the positioning column. The positioning column is penetrated at the bottom of the elastic member 43 to realize the positioning of the elastic member 43 at the bottom of the radial direction. The positioning groove is used to accommodate the elastic member 43 to realize the positioning of the elastic member 43 at the bottom of the radial direction. At the same time, a mounting groove is arranged at the bottom of the lower conductive magnet 32 to realize the positioning of the elastic member 43 at the top of the radial direction, thereby ensuring that the two ends of the elastic member 43 in the axial direction have a good positioning effect to avoid the occurrence of offset.

It should be noted that the push rod 411 and the mounting seat 412 are an integrally formed structure, which is realized by an integral injection molding process, thereby reducing the number of parts assembly steps and lowering the production cost.

In this embodiment, as shown in FIG3-4, the support portion 42 is a U-shaped bracket, and the open end of the U-shaped bracket is arranged toward the push rod unit 41. In this way, the U-shaped bracket is equivalent to a protective cover of the elastic member 43, and plays a protective role for the elastic member 43.

In this embodiment, the two side arms of the U-shaped bracket are used to limit the elastic member 43. The side arms of the U-shaped bracket and the push rod unit 41 are matched through the limiting protrusion 413 and the limiting hole 422.

Specifically, the two side arms of the U-shaped bracket play a role in limiting the elastic member 43, so as to prevent the elastic member 43 from being separated during the extrusion and reset process. Through the cooperation between the side arms of the U-shaped bracket and the push rod unit 41 through the limiting protrusion 413 and the limiting hole 422, the push rod unit 41 can pull the lower conductive magnet 32 to move through the U-shaped bracket. At the same time, the two side arms of the U-shaped bracket extend along the moving direction of the push rod unit 41, that is, the two side arms of the U-shaped bracket have a certain height, so that the U-shaped bracket does not fit with the mounting seat 412, and there is a certain height space between the U-shaped bracket and the mounting seat 412, which provides a movable space for the compression or reset of the elastic member 43.

It can be understood that one of the side arm of the U-shaped bracket and the push rod unit 411 is provided with a limiting protrusion 413. Another limiting hole 422 is provided, and the limiting hole 422 is used to limit the position of the limiting protrusion 413.

Specifically, a limiting protrusion 413 is provided on the outer wall of the mounting seat 412 of the push rod unit 41, and limiting holes 422 are provided on the two side arms of the support portion 42. The limiting protrusion 413 is at least partially provided in the limiting hole 422, and the limiting hole 422 serves to limit the limiting protrusion 413 up and down.

In this embodiment, a gap is provided between the limiting hole 422 and the limiting protrusion 413 along the moving direction of the push rod unit 41 .

A gap is provided between the limiting hole 422 and the limiting protrusion 413 , and the gap is provided along the moving direction of the push rod unit 41 . The gap provides a movable space for the limiting protrusion 413 , and at the same time ensures that the support part 42 can move up and down, it also realizes the function of stopping the support part 42 .

As shown in FIG5 , the working process of the relay provided in this embodiment is as follows:

During initial installation, the elastic member 43 is in a pre-compression state, the support portion 42, the lower conductive magnet 32, and the movable spring piece 22 are riveted together, and under the driving action of the push rod unit 41, the support portion 42, the lower conductive magnet 32, and the movable spring piece 22 move synchronously, and at this time, the limiting protrusion 413 fits under the limiting hole 422, which is used for limiting the U-shaped bracket;

When the push rod unit 41 moves to a suitable position, the moving contacts at both ends of the moving spring 22 are in contact with the two static contact lead-out ends 21 respectively;

Subsequently, the push rod unit 41 continues to move upward. Since the movable spring 22 has contacted the bottom ends of the two static contact lead-out terminals 21, the movable spring 22 cannot continue to move upward. The push rod unit 41 continues to move upward to achieve the overtravel of the contact. At this time, since the limiting protrusion 413 is in contact with the upper part of the limiting hole 422, the lower part of the limiting hole 422 and the limiting hole 422 located above provide movement space for the overtravel, so that the push rod unit 41 can continue to squeeze the elastic member 43. The elastic member 43 further provides an upward supporting force for the lower conductive magnet 32 to ensure the contact pressure, further avoid the movable spring 22 from being separated from the static contact lead-out terminal 21, and ensure the reliability of the contact between the movable spring 22 and the static contact lead-out terminal 21.

Embodiment 2

This embodiment is similar to the first embodiment, and the only difference is the structure of the support portion 42 and the mounting seat 412. It should be particularly noted that in this embodiment, the limiting protrusion 413 is in contact with the upper limiting surface of the limiting hole 422 at the initial stage.

As shown in Figures 6-9, Figure 6 shows a schematic diagram of the structure of the relay of the second embodiment of the present disclosure; Figure 7 shows a top view of the relay of the second embodiment of the present disclosure; Figure 8 shows a cross-sectional view of B-B in Figure 7; Figure 9 shows an exploded view of the relay of the second embodiment of the present disclosure.

The support portion 42 provided in this embodiment is a fixing plate, which is a planar structure. A through hole is provided at the center of the fixing plate, and the through hole provides an escape space for the elastic member 43. The upper end of the elastic member 43 passes through the through hole and abuts against the mounting groove of the lower conductive magnet 32. The fixing plate has two protrusions arranged opposite to each other, and a third connecting hole is provided in the protrusions. The connecting member 5 is respectively provided in the first connecting hole, the second connecting hole and the third connecting hole to achieve the fixation between the movable spring 22, the lower conductive magnet 32 and the fixing plate.

In this embodiment, as shown in FIG8-9, the push rod unit 41 has a baffle 421 in the direction toward the support portion 42. The baffle plate 421 is used to limit the elastic member 43. The baffle plate 421 and the fixing plate are matched through the limiting protrusion 413 and the limiting hole 422.

If the support portion 42 is a fixed sheet, the planar structure of the fixed sheet causes its height to be relatively small. By setting a baffle 421 in the direction of the push rod unit 41 toward the support portion 42, that is, the mounting seat 412 of the push rod unit 41 is provided with a baffle 421, the baffle 421 plays a role in limiting the elastic member 43, thereby preventing the elastic member 43 from being separated during the extrusion and reset process. By connecting the baffle 421 to the fixed sheet, the push rod unit 41 can drive the fixed sheet and the lower conductive magnet 32 to move synchronously. At the same time, the baffle 421 extends along the moving direction of the push rod unit 41, that is, the baffle 421 has a certain height, so that there is a certain height space between the fixed sheet and the mounting seat 412, providing a movable space for the compression or reset of the elastic member 43.

It is understandable that one of the baffle 421 and the fixing plate is provided with a limiting protrusion 413 , and the other is provided with a limiting hole 422 , and the limiting hole 422 is used for limiting the position of the limiting protrusion 413 .

Specifically, the fixing plate is provided with a limiting protrusion 413 , and a limiting hole 422 is provided on the baffle 421 of the mounting seat 412 in the push rod unit 41 . The limiting protrusion 413 is at least partially disposed in the limiting hole 422 , and the limiting hole 422 is used to limit the limiting protrusion 413 .

It should be noted that there are two limiting protrusions 413, the two limiting protrusions 413 are arranged opposite to each other, the two protrusions are arranged opposite to each other, the two limiting protrusions 413 and the two protrusions are arranged at intervals, and the angle between adjacent limiting protrusions 413 and the protrusions is 90°.

Embodiment 3

This embodiment is similar to the first embodiment, the only difference being that the support portion 42 is not provided. The push rod unit 41 can still push or pull the movable member under the cooperation of the limiting protrusion 413 and the limiting hole 422 .

As shown in Figures 10-11, the lower conductive magnet 32 provided in this embodiment includes a magnet body and two side plates, the two side plates are respectively arranged on both sides of the magnet body, and the push rod unit 41 has two baffles 421 facing the direction of the lower conductive magnet 32; wherein the baffles 421 and the side plates are correspondingly matched through the limiting protrusions 413 and the limiting holes 422.

By setting a baffle 421 in the direction of the push rod unit 41 toward the lower conductive magnet 32, that is, the mounting seat 412 of the push rod unit 41 is provided with a baffle 421, the baffle 421 plays a role in limiting the elastic member 43, thereby preventing the elastic member 43 from being separated during the extrusion and reset process. The baffle 421 is connected to the side plate, and the push rod unit 41 can drive the side plate and the lower conductive magnet 32 to move synchronously. At the same time, the baffle 421 extends along the moving direction of the push rod unit 41, that is, the baffle 421 has a certain height, so that there is a certain height space between the side plate and the mounting seat 412, providing a movable space for the compression or reset of the elastic member 43.

It can be understood that the push rod unit 41 is directly connected to the movable component, which makes assembly easier and does not cause interference between the upper portion of the movable spring 22 and the upper conductive magnet 31 during the overtravel process.

It can be understood that one of the baffle plate 421 and the side plate is provided with a limiting protrusion 413 , and the other is provided with a limiting hole 422 , and the limiting hole 422 is used to limit the limiting protrusion 413 .

Specifically, the side plate is provided with a limiting protrusion 413, and the baffle 421 of the mounting seat 412 in the push rod unit 41 is provided with a limiting hole 422, and the limiting protrusion 413 is at least partially disposed in the limiting hole 422, and the limiting hole 422 is used to limit the limiting protrusion 413. Limit the position.

As shown in FIG. 10 to FIG. 12 , the driving assembly 4 further includes an electromagnet unit 44, which includes a coil frame 441, a coil 442 and a moving iron core 443. The coil frame 441 is in the shape of a hollow cylinder and is formed of an insulating material, and the coil 442 surrounds the coil frame 441. The moving iron core 443 is movably arranged in the center hole of the coil frame 441, and the moving iron core 443 is connected to the bottom end of the push rod unit 41. When the coil 442 is energized, the moving iron core 443 moves upward, and the moving iron core 443 drives the push rod unit 41 to move upward. When the coil 442 is disconnected from the current, the moving iron core 443 moves downward under the action of the reset spring, and the moving iron core 443 drives the push rod unit 41 to move downward. The moving iron core 443 and the push rod unit 41 can be connected by threaded connection, riveting, welding or other methods.

Embodiment 4

The structure of this embodiment is similar to that of the first embodiment and the second embodiment, and the only difference is that the structure of the insulating cover 11 is different.

As shown in Figures 13 to 16, the insulating cover 11 provided in this embodiment includes a ceramic plate 111 and an insulating support portion 112, and a metallized area is provided on one side of the ceramic plate 111 close to the upper conductive magnet 31. The insulating support portion 112 is located below the ceramic plate 111 and is used to support the ceramic plate 111. The ceramic plate 111 and the insulating support portion 112 are split structures.

Since a metallized area needs to be provided on the inner wall at the top of the insulating cover 11, if the insulating cover 11 is a cover body with an opening downward, the operator needs to reach into the insulating cover 11 from the opening end to perform the metallization treatment. The ceramic plate 111 and the insulating support part 112 of the insulating cover 11 provided in this embodiment are split structures. The metallized area can be provided on the side of the ceramic plate 111 close to the upper conductive magnet 31, and then the ceramic plate 111 is provided on the insulating support part 112. The insulating support part 112 plays a role in supporting the ceramic plate 111 to ensure the supporting effect of the ceramic plate 111. Compared with directly processing the metallized area on the insulating cover 11, by setting and processing the metallized area on the ceramic plate 111, the plate-like structure of the ceramic plate 111 is easier to process the metallized area, thereby better realizing the welding plane welded with the upper conductive magnet 31.

In this embodiment, a metallized portion is provided on a side of the ceramic plate 111 away from the upper conductive magnet 31 , and the metallized portion is used to connect the static contact lead-out terminal 21 .

A metallized portion is provided on one side of the ceramic plate 111 away from the upper conductive magnet 31 , that is, a metallized portion is provided on the top of the ceramic plate 111 for brazing the two static contact lead terminals 21 , thereby ensuring the fixing effect of the static contact lead terminals 21 on the ceramic plate 111 .

In this embodiment, the ceramic board 111 is provided with a metallization structure corresponding to the insulating support portion 112 , and the metallization structure is used to connect at least a portion of the insulating support portion 112 .

The ceramic plate 111 is provided with a metallization structure corresponding to the insulating support portion 112 , that is, a metallization treatment is performed on the bottom of the ceramic plate 111 for brazing at least a portion of the insulating support portion 112 , thereby ensuring a fixing effect between the insulating support portion 112 and the ceramic plate 111 .

In this embodiment, as shown in Figures 13-16, the insulating support portion 112 includes a frame 1121 and an insulating frame 1122. The frame 1121 is located below the ceramic board 111 and is used to support the ceramic board 111. The frame 1121 is connected to the metallized structure; the insulating frame 1122 is arranged in the frame 1121 and is connected to the ceramic board 111.

The frame 1121 can also be called a frame sheet. The frame 1121 is arranged on the yoke iron plate 12. The yoke iron plate 12 plays a role in the surrounding The frame 1121 supports the function. Compared with the existing frame sheet, the height of the surrounding frame 1121 is relatively high, which is equivalent to the height increase. The surrounding frame 1121 is located below the ceramic plate 111, and plays the role of supporting the ceramic plate 111 to ensure the supporting effect of the ceramic plate 111. Since the inner wall of the ceramic plate 111 and the upper conductive magnet 31 are brazed, the surrounding frame 1121 also plays the role of supporting the upper conductive magnet 31. The insulating frame 1122 is arranged in the surrounding frame 1121, and the insulating frame 1122 is connected to the ceramic plate 111 to provide an insulating environment for the contact assembly 2 and the anti-short circuit assembly 3 inside the surrounding frame 1121.

In this embodiment, the metallization structure and the metallization area are located in the same horizontal plane.

It can be understood that both sides of the ceramic plate 111 are metallized, a metallized portion is provided on the top surface of the ceramic plate 111, and a metallized structure and a metallized area are provided on the bottom surface of the ceramic plate 111. By arranging the metallized structure and the metallized area in the same horizontal plane, it is convenient to metallize the bottom surface of the ceramic plate 111.

In this embodiment, the insulating frame 1122 is bonded to the ceramic board 111 .

Since the metallized structure of the ceramic plate 111 is connected to the frame 1121, that is, the frame 1121 and the ceramic plate 111 are connected by brazing, there is no need to fix the insulating frame 1122 and the ceramic plate 111 by brazing. The top of the insulating frame 1122 and the ceramic plate 111 can be fixed by bonding with glue or the like, thereby achieving the purpose of reducing production costs.

Embodiment 5

The structure of this embodiment is similar to that of the first embodiment, the second embodiment, and the third embodiment, and the only difference is that the structure of the insulating support portion 112 in the insulating cover 11 is different.

As shown in Figures 17-20, the insulating support part 112 provided in this embodiment includes a ceramic frame 1123 and a surrounding frame 1121. One end of the ceramic frame 1123 is connected to the surrounding frame 1121, and the other end is connected to the metallized structure of the ceramic board 111. The surrounding frame 1121 supports the ceramic board 111.

It should be particularly noted that the ceramic plate 111 is directly welded to the ceramic frame 1123, and the ceramic frame 1123 is further welded to the surrounding frame 1121. Since the ceramic plate 111 is a sheet structure, a welding plane for welding with the upper conductive magnet 31 can be better realized.

As shown in Figures 17 to 20, the enclosure 1121 can also be called a frame sheet. The enclosure 1121 is arranged on the yoke iron plate 12, and the yoke iron plate 12 plays a role in supporting the enclosure 1121. The height of the enclosure 1121 is relatively short, and the ceramic frame 1123 is located below the ceramic plate 111. One end of the ceramic frame 1123 is connected to the enclosure 1121, and the other end is connected to the metallized structure of the ceramic plate 111. The ceramic frame 1123 supports the ceramic plate 111 and ensures the supporting effect of the ceramic plate 111. Since the inner wall of the ceramic plate 111 is brazed with the upper conductive magnet 31, the ceramic frame 1123 also plays a role in supporting the upper conductive magnet 31. Under the cooperation of the ceramic frame 1123 and the ceramic plate 111, an insulating environment is provided for the contact assembly 2 and the anti-short circuit assembly 3 in the internal space of the ceramic frame 1123 and the ceramic plate 111.

In the embodiments of the present disclosure, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; "a pair" and "one" are only used to describe a pair or one and are not to be understood as only a pair or only one; the term "plurality" refers to two or more than two, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the above terms can be understood according to the specific circumstances. The specific meaning of the term in the embodiments of this disclosure.

In the description of the embodiments of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by terms such as “up”, “down”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the embodiments of the present disclosure.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims (16)

1. A relay, characterized in that it comprises:

   A contact container (1) comprising an insulating cover (11);

   A contact assembly (2), comprising a moving reed (22) and a pair of stationary contact lead-out terminals (21), wherein the stationary contact lead-out terminals (21) are arranged on the insulating cover (11), and the stationary contact lead-out terminals (21) at least partially extend into the insulating cover (11), and the moving reed (22) is arranged in the insulating cover (11), and the moving reed (22) is used to contact or separate from the pair of stationary contact lead-out terminals (21);

   An anti-short circuit assembly (3) comprises an upper conductive magnet (31) and a lower conductive magnet (32), wherein the upper conductive magnet (31) is arranged on the top inner wall of the insulating cover (11), and the lower conductive magnet (32) is arranged and fixed on the bottom of the movable spring (22), and a magnetic conductive loop can be formed between the upper conductive magnet (31) and the lower conductive magnet (32) to generate an attractive force when a large fault current occurs in the movable spring (22), so as to resist the electric repulsive force between the movable spring (22) and the static contact lead-out terminal (21);

   The upper conductive magnet (31) is provided with a fixed mounting foot (311), and the fixed mounting foot (311) is fixedly connected to the top inner wall of the insulating cover (11), so that a gap (312) is provided between the upper conductive magnet (31) and the top inner wall of the insulating cover (11).
2. The relay according to claim 1 is characterized in that the insulating cover (11) is a ceramic cover, and a metallized area is provided on the top inner wall of the ceramic cover corresponding to the position of the fixed mounting foot (311), and the fixed mounting foot (311) is welded to the ceramic cover through the metallized area.
3. The relay according to claim 1 or 2 is characterized in that it also includes a driving component (4), the driving component (4) includes a push rod unit (41), and the push rod unit (41) can drive the movable reed (22) to move in a direction close to the static contact lead-out end (21); wherein the movable reed (22) and the lower conductive magnet (32) form a movable component, and the movable component and the push rod unit (41) cooperate through a limiting protrusion (413) and a limiting hole (422).
4. The relay according to claim 3 is characterized in that the lower conductive magnet (32) includes a magnet body and two side plates, the two side plates are respectively arranged on both sides of the magnet body, and the push rod unit (41) is provided with two baffles (421) facing the direction of the lower conductive magnet (32); wherein the baffle (421) and the side plates are matched through a limiting protrusion (413) and a limiting hole (422).
5. The relay according to claim 3 is characterized in that the movable component also includes a supporting portion (42), the supporting portion (42) is arranged between the push rod unit (41) and the lower conductive magnet (32), the supporting portion (42) is fixedly connected to the lower conductive magnet (32), and the push rod unit (41) and the supporting portion (42) cooperate through the limiting protrusion (413) and the limiting hole (422) to drive the movable reed (22) to move.
6. The relay according to claim 5, characterized in that the driving assembly (4) further comprises an elastic member (43), one end of the elastic member (43) abuts against the push rod unit (41), and the other end abuts against the movable member.
7. The relay according to claim 6 is characterized in that the supporting portion (42) is a U-shaped bracket, the open end of the U-shaped bracket is arranged toward the push rod unit (41), and the two side arms of the U-shaped bracket are used to limit the elastic member (43); wherein the side arms of the U-shaped bracket and the push rod unit (41) are matched through a limiting protrusion (413) and a limiting hole (422).
8. The relay according to claim 6 is characterized in that the supporting portion (42) is a fixed plate, and the push rod unit (41) is provided with a baffle (421) in the direction of the supporting portion (42), and the baffle (421) is used to limit the elastic member (43); wherein the baffle (421) and the fixed plate are matched through a limiting protrusion (413) and a limiting hole (422).
9. The relay according to claim 1 or 2 is characterized in that the upper conductive magnet (31) is a straight-line structure, and the upper conductive magnet (31) extends along the width direction of the movable spring (22); and/or the lower conductive magnet (32) is a U-shaped structure, and the opening of the lower conductive magnet (32) is arranged toward the movable spring (22), and the parts of the lower conductive magnet (32) located on both sides of the width direction of the movable spring (22) can abut against the upper conductive magnet (31).
10. The relay according to claim 1 or 2, characterized in that the insulating cover (11) comprises:

    A ceramic plate (111), wherein a metallized area is provided on a side of the ceramic plate (111) close to the upper conductive magnet (31);

    An insulating support portion (112), located below the ceramic plate (111) and used to support the ceramic plate (111);

    Wherein, the ceramic plate (111) and the insulating support portion (112) are split structures.
11. The relay according to claim 10, characterized in that a metallized portion is provided on a side of the ceramic plate (111) away from the upper conductive magnet (31), and the metallized portion is used to connect the static contact lead-out terminal (21).
12. The relay according to claim 10, characterized in that the ceramic plate (111) is provided with a metallization structure corresponding to the insulating support portion (112), and the metallization structure is used to connect at least a portion of the insulating support portion (112).
13. The relay according to claim 12, characterized in that the insulating support portion (112) comprises:

    A surrounding frame (1121), located below the ceramic plate (111) and used to support the ceramic plate (111), the surrounding frame (1121) being connected to the metallized structure;

    An insulating frame (1122) is disposed in the surrounding frame (1121), and the insulating frame (1122) is connected to the ceramic plate (111).
14. The relay according to claim 13, characterized in that the insulating frame (1122) is bonded to the ceramic board (111).
15. The relay according to claim 12 is characterized in that the insulating support portion (112) comprises a ceramic frame (1123) and a surrounding frame (1121), one end of the ceramic frame (1123) is connected to the surrounding frame (1121), and the other end is connected to the metallized structure of the ceramic board (111), and the surrounding frame (1121) supports the ceramic board (111).
16. The relay according to claim 12, characterized in that the metallization structure and the metallization area are located in the same horizontal plane.