CN219180432U - Multi-fracture relay - Google Patents

Abstract

The utility model discloses a multi-fracture relay, which comprises two groups of contact assemblies, wherein the two groups of contact assemblies are respectively provided with at least two moving contacts which are arranged at intervals along a first direction and at least two fixed contacts which are respectively arranged in a one-to-one opposite way with the moving contacts, and at least two moving contacts in one group of contact assemblies are respectively connected with at least two moving contacts in the other group of contact assemblies in series in a one-to-one corresponding way, so that the two groups of contact assemblies form at least two switch branches; and, the at least two switch branches are formed in parallel connection. The multi-fracture relay is novel and reasonable in structure, the unreliable risk caused by adhesion is greatly reduced, the contacts are effectively protected, the performance of a relay product is well optimized and improved, and the equipment use risk is reduced.

Description

Multi-fracture relay

Technical Field

The utility model relates to a relay, in particular to a multi-fracture relay.

Background

The existing electromagnetic relay generally adopts a rigid moving contact, and when the relay is in suction and release, two breaks of the moving contact act simultaneously to realize the electric disconnection or connection of a main loop. When a problem occurs in a product or unexpected fault current occurs in a loop, adhesion can possibly occur to contacts of the relay, and the main loop cannot be reliably disconnected, so that normal operation of equipment is affected.

In addition, the contact resistance between the contacts of the existing electromagnetic relay is overlarge, so that the contacts are heated seriously and form fusion welding, the movable contact and the static contact of the product are unreliable to contact, and the performance of the relay is seriously problematic.

In view of this, the present utility model has been made.

Disclosure of Invention

In order to overcome the defects, the utility model provides the multi-fracture relay, which greatly reduces unreliable risks caused by adhesion on one hand, and effectively protects the contacts on the other hand, so that the performance of a relay product is well optimized and improved, and the use risk of equipment is reduced.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the multi-fracture relay comprises two groups of contact assemblies, wherein each contact assembly is provided with at least two moving contacts which are arranged at intervals along a first direction and at least two fixed contacts which are respectively arranged in a one-to-one opposite manner with the moving contacts, and at least two moving contacts in one group of contact assemblies are respectively connected with at least two moving contacts in the other group of contact assemblies in series in a one-to-one corresponding manner, so that the two groups of contact assemblies form at least two switch branches; and, the at least two switch branches are formed in parallel connection.

As a further improvement of the utility model, the moving contact in one group of the contact assemblies is defined as a moving contact A, and the moving contact in the other group of the contact assemblies is defined as a moving contact B; correspondingly, the fixed contacts which are arranged in one-to-one opposite to the moving contacts A are defined as fixed contacts A, and the fixed contacts which are arranged in one-to-one opposite to the moving contacts B are defined as fixed contacts B;

at least two moving contacts A are respectively connected with at least two moving contacts B in series in a one-to-one correspondence manner through conductive pieces; and the moving contact A and the moving contact B which are connected in series, the fixed contact A which is arranged opposite to the moving contact A and the fixed contact B which is arranged opposite to the moving contact B form a switch branch together.

As a further development of the utility model, a drive mechanism is provided, which is able to drive both sets of the contact assemblies in a synchronized manner.

As a further improvement of the utility model, at least two moving contacts in each group of contact assemblies are respectively asynchronous with the action of closing and connecting or opening the fixed contacts matched with the moving contacts.

As a further improvement of the utility model, the time sequence of the attraction communication of at least two moving contacts in each group of contact assemblies with the fixed contacts matched with the moving contacts is inversely proportional to the distance between the moving contacts and the actuating end of the driving mechanism, namely: the time of the suction communication between the moving contact close to the actuating end of the driving mechanism and the fixed contact is later than the time of the suction communication between the moving contact far away from the actuating end of the driving mechanism and the fixed contact;

in addition, the time sequence of disconnection of at least two moving contacts in each group of contact assemblies and the fixed contacts matched with the moving contacts is in direct proportion to the distance between the moving contacts and the actuating end of the driving mechanism, namely: the time for disconnecting the moving contact close to the actuating end of the driving mechanism from the fixed contact is earlier than the time for disconnecting the moving contact far from the actuating end of the driving mechanism from the fixed contact.

As a further improvement of the utility model, two movable contact springs are arranged, at least two movable contact heads which are arranged at intervals along the first direction are respectively arranged on the two movable contact springs, and the two movable contact springs are respectively connected with the driving mechanism; the movable contact is provided with two leading-out sheets, the two leading-out sheets are respectively arranged in one-to-one opposite to the two movable contact springs, and at least two fixed contacts which are arranged at intervals along the first direction are respectively arranged on the two leading-out sheets.

As a further improvement of the utility model, the two movable reeds are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction;

correspondingly, the two lead-out sheets are also arranged at intervals along the second direction.

As a further improvement of the utility model, at least two riveting holes A which are distributed at intervals along the first direction are respectively arranged on the two movable contact pieces, and at least two movable contact pieces are respectively riveted and fixed in at least two riveting holes A;

at least two riveting holes B which are distributed at intervals along the first direction are respectively arranged on the two leading-out sheets, and at least two fixed contacts are respectively riveted and fixed in at least two riveting holes B.

As a further improvement of the utility model, the driving mechanisms are two groups, and the two groups of driving mechanisms respectively and independently drive the two groups of contact assemblies to act.

As a further improvement of the utility model, the two groups of driving mechanisms can drive the two movable contact blades to synchronously swing towards or back to the two leading-out sheets, so that the action of sucking connection or disconnection of at least two movable contacts in each group of contact assemblies with the matched fixed contacts is asynchronous.

As a further improvement of the utility model, based on the state that the multi-fracture relay is vertically placed, two movable reeds are respectively and transversely arranged above two leading-out sheets;

the two groups of driving mechanisms comprise coils, magnetic iron cores, yokes and armatures, wherein the magnetic iron cores are transversely inserted into the coils, the yokes are transversely arranged beside the lower sides of the coils and are simultaneously connected with the tail ends of the magnetic iron cores, the armatures are vertically arranged beside the head ends of the magnetic iron cores, and meanwhile, the armatures are also rotationally connected with the rear end sides of the yokes and form rotating fulcrums at the connecting positions, namely: the armature can swing in a lever type around the rotating fulcrum;

the rear sides of the two movable spring plates are respectively fixedly connected with the lower ends of the two armatures, so that when the two coils apply set voltage, the two armatures can deflect positively, the upper ends of the two armatures are respectively connected with the head ends of the two magnetic cores in a sucking way, and the lower ends of the two armatures drive the two movable spring plates to swing obliquely downwards; when the two coils are powered off, the two armatures can deflect reversely, so that the upper ends of the two armatures are disconnected with the head ends of the two magnetic cores respectively, and the lower ends of the two armatures drive the two movable spring plates to tilt upwards and swing.

As a further improvement of the present utility model, the front end side of the yoke is fixedly connected with the tail end of the magnet core through a connecting plate; a return spring is connected between the bottom wall of the yoke and the lower part of the armature;

the armature has a first section of vertical arrangement, a second section of horizontal arrangement, and link up in first section with link up the section between the second section, wherein first section vertical set up in the head end next door of magnet core, link up the section with the rear end side of yoke rotates to be connected, the second section is arranged in the yoke below, and through injection molding with movable reed rear side fixed connection.

As a further improvement of the utility model, the upper sides of at least two of the stationary contacts in each group of contact assemblies are not in the same height plane.

As a further improvement of the utility model, the conductive piece adopts a flexible connecting piece, the flexible connecting piece comprises a wire and two metal connectors which are respectively and fixedly connected to two ends of the wire, and the two metal connectors are respectively used for being connected with the moving contact A and the moving contact B.

As a further improvement of the utility model, the wire is a single-strand wire or a multi-strand wire;

the metal connector adopts square copper tube head, the metal connector with wire one end welding links firmly, simultaneously the metal connector still with moving contact A or moving contact B riveting links firmly.

As a further improvement of the utility model, the conductive piece adopts a flexible connecting piece, the flexible connecting piece is a flexible copper bar formed by stacking a plurality of copper foils, and two ends of the flexible copper bar are respectively used for being connected with the moving contact A and the moving contact B.

The beneficial effects of the utility model are as follows: (1) on one hand, the two groups of contact assemblies are formed into at least two switch branches connected in parallel, so that the resistance of the contact assemblies can be greatly reduced, and the load bearing capacity of the relay is improved; on the other hand, by arranging two groups of contact assemblies, when a product has a problem or unexpected fault current occurs in a loop and the contacts of the relay are possibly adhered, the two groups of contact assemblies are controlled independently of each other, so that even if the movable contact and the fixed contact in one group of contact assemblies are adhered, the other group of contact assemblies can realize instant disconnection of the main loop, and the safety of an electric loop is ensured. Therefore, the contact assembly provided by the utility model greatly reduces the unreliable risk of adhesion. (2) The utility model realizes that the moving contact far from the actuating end of the actuating mechanism is firstly closed and then opened by controlling the action sequence of the suction connection or disconnection of at least two moving contacts in each group of contact assemblies and the fixed contact matched with the moving contacts; a relay working mode of closing after a movable contact and a fixed contact close to the actuating end of the actuating mechanism and opening first; because the moving contact and the static contact which are far away from the actuating end of the driving mechanism are firstly closed and then opened; the relay can bear the arcing energy of the electric arc generated when the relay is closed or opened, so that the moving and static contacts which are closed later and opened earlier can well avoid the risks of being ablated and damaged by the electric arc, and can be effectively protected, thereby the performance of the relay product can be well optimized and improved, and the use risk of equipment can be reduced.

Drawings

Fig. 1 is a schematic perspective view of a multi-break relay according to the present utility model at a first view angle;

fig. 2 is a schematic perspective view of the multi-break relay according to the present utility model at a second view angle;

FIG. 3 is a schematic side view (left view) of a multi-break relay according to the present utility model;

FIG. 4 is a second schematic side view (back view) of the multi-break relay of the present utility model;

FIG. 5 is a third schematic side view (front view) of the multi-break relay according to the present utility model;

fig. 6 is a schematic view of the contact assembly of the present utility model assembled with the armature and shown in a first view;

FIG. 7 is a schematic view of the contact assembly of the present utility model assembled with the armature and shown in a second view;

FIG. 8 is a schematic view of one of the two sets of contact assemblies of the present utility model assembled together;

FIG. 9 is a second schematic view of the structure of two sets of contact assemblies of the present utility model assembled together;

fig. 10 is a schematic circuit diagram of the contact assembly of the present utility model when two sets of contact assemblies are assembled together.

The following description is made with reference to the accompanying drawings:

1. a contact assembly; 10. a moving contact; 100. a moving contact A; 101. a moving contact B; 11. a stationary contact; 110. a fixed contact A; 111. a fixed contact B; 12. a conductive member; 120. a wire; 121. a metal connector; 13. a movable reed; 14. a lead-out sheet; 3. a driving mechanism; 30. a coil; 31. a magnetic core; 32. a yoke; 33. an armature; 330. a first section; 331. a second section; 332. and (5) connecting the sections.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Examples:

please refer to fig. 1 to 10. The embodiment provides a multi-fracture relay, which comprises two groups of contact assemblies 1, wherein the two groups of contact assemblies 1 are respectively provided with at least two moving contacts 10 which are arranged at intervals along a first direction and at least two fixed contacts 11 which are respectively arranged in a one-to-one opposite manner with the moving contacts 10, and at the same time, at least two moving contacts 10 in one group of contact assemblies 1 are respectively connected with at least two moving contacts 10 in the other group of contact assemblies 1 in series in a one-to-one correspondence manner, so that the two groups of contact assemblies 1 form at least two switch branches; and, the at least two switch branches are formed in parallel connection.

The connection relationship between the two groups of contact assemblies 1 is further described as follows: referring to fig. 1 and fig. 7 to fig. 9, the moving contact in one group of the contact assemblies 1 is defined as a moving contact a100, and the moving contact in the other group of the contact assemblies 1 is defined as a moving contact B101; correspondingly, the fixed contacts which are arranged in one-to-one opposite to the movable contact A100 are defined as fixed contacts A110, and the fixed contacts which are arranged in one-to-one opposite to the movable contact B101 are defined as fixed contacts B111;

at least two moving contacts A100 are respectively connected with at least two moving contacts B101 in series in a one-to-one correspondence manner through conductive pieces 12; and one of the moving contacts a100 and one of the moving contacts B101, the fixed contact a110 arranged opposite to the moving contact a100, and the fixed contact B111 arranged opposite to the moving contact B101 connected in series together constitute one of the switch branches, and the at least two switch branches are connected in parallel; the circuit principle can be seen from fig. 10.

In one aspect, the utility model forms two groups of contact assemblies into at least two switch branches connected in parallel, so that the resistance of the contact assemblies can be greatly reduced, and the load bearing capacity of the relay is improved; on the other hand, by arranging two groups of contact assemblies, when a product has a problem or unexpected fault current occurs in a loop and the contacts of the relay are possibly adhered, the two groups of contact assemblies are controlled independently of each other, so that even if the movable contact and the fixed contact in one group of contact assemblies are adhered, the other group of contact assemblies can realize instant disconnection of the main loop, and the safety of an electric loop is ensured. Therefore, the contact assembly provided by the utility model greatly reduces the unreliable risk of adhesion.

In this embodiment, the multi-fracture relay further includes a driving mechanism 3, where the driving mechanism 3 can drive two groups of contact assemblies 1 to act synchronously, that is: the drive mechanism 3 is capable of driving such that the operating states of the two sets of the contact assemblies 1 are synchronized. Further described is: the driving mechanism 3 can drive two moving contacts 10 in the two groups of contact assemblies 1 and connected in series to synchronously move relatively to two fixed contacts 11 (matched with the two moving contacts 10) close to (realize the suction connection of the moving contacts and the fixed contacts) or away from (realize the disconnection of the moving contacts).

In addition, the driving mechanism 3 can also drive at least two moving contacts 10 in each group of contact assemblies 1 to be respectively in suction connection with or disconnection from the fixed contacts 11 matched with the moving contacts.

The concrete description is as follows: the time sequence of the suction communication of at least two moving contacts 10 in each group of the contact assemblies 1 with the fixed contacts 11 matched with the moving contacts is inversely related to the distance between the moving contacts 10 and the executing end of the driving mechanism 3, namely: the time of the suction communication between the moving contact 10 close to the execution end of the driving mechanism 3 and the fixed contact 11 is later than the time of the suction communication between the moving contact 10 far from the execution end of the driving mechanism 3 and the fixed contact 11; in addition, the time sequence of opening at least two moving contacts 10 in each group of contact assemblies 1 respectively with the matched fixed contacts 11 is in direct proportion to the distance between the moving contacts 10 and the actuating end of the driving mechanism 3, namely: the time for opening the moving contact 10 close to the actuating end of the driving mechanism 3 and the fixed contact 11 is earlier than the time for opening the moving contact 10 far from the actuating end of the driving mechanism 3 and the fixed contact 11.

As can be seen from the above, the present utility model controls the actuation sequence of the at least two moving contacts 10 in each group of contact assemblies 1, which are respectively connected to or disconnected from the fixed contact 11 in a suction manner, so as to realize that the moving contact and the fixed contact far from the execution end of the driving mechanism 3 are firstly closed and then opened; a relay working mode of closing and opening after a movable contact and a fixed contact close to the execution end of the driving mechanism 3; because the moving contact and the static contact which are far away from the execution end of the driving mechanism 3 are firstly closed and then opened; the relay can bear the arcing energy of the electric arc generated when the relay is closed or opened, so that the moving and static contacts which are closed later and opened earlier can well avoid the risks of being ablated and damaged by the electric arc, and can be effectively protected, thereby the performance of the relay product can be well optimized and improved, and the use risk of equipment can be reduced.

The specific connection and operation of the "the driving mechanism 3 drives the two sets of contact assemblies 1" will be described in detail.

In this embodiment, two movable contact springs 13 and two lead-out plates 14 are provided, where the two movable contact springs 13 are arranged at intervals along a second direction, the second direction is perpendicular to the first direction, at least two movable contacts 10 are respectively installed on the two movable contact springs 13 and arranged at intervals along the first direction, and the two movable contact springs 13 are also connected with the driving mechanism 3 respectively; the two lead-out pieces 14 are respectively arranged opposite to the two movable contact springs 13 one by one, namely, the two lead-out pieces 14 are also arranged at intervals along the second direction, and at least two fixed contacts 11 which are arranged at intervals along the first direction are respectively arranged on the two lead-out pieces 14.

Further preferably, the movable contact 10 is mounted on the movable contact spring 13 according to the following structure: at least two riveting holes A which are arranged at intervals along the first direction are respectively arranged on the two movable contact springs 13, and at least two movable contacts 10 are respectively riveted and fixed in the at least two riveting holes A.

The structure for realizing that the static contact 11 is mounted on the lead-out sheet 14 is as follows: at least two riveting holes B which are arranged at intervals along the first direction are respectively arranged on the two leading-out sheets 14, and at least two fixed contacts 11 are respectively riveted and fixed in the at least two riveting holes B.

Further preferably, in this example, the driving mechanisms 3 are two groups, the two groups of driving mechanisms 3 respectively and independently drive the two groups of contact assemblies 1 to act, and the two groups of driving mechanisms 3 can drive the two movable reeds 13 to synchronously tilt towards or back to the two drawing pieces 14, namely: the two groups of driving mechanisms 3 can ensure that the synchronous action of the two groups of contact assemblies 1 is realized by driving the two movable contact springs 13 to synchronously swing obliquely relative to the two leading-out sheets 14, and at the same time, the action that at least two movable contacts 10 in each group of contact assemblies 1 are respectively connected with or disconnected from the matched fixed contacts 11 in a suction way is asynchronous.

Still further preferably, the structure for realizing that the two groups of driving mechanisms 3 can drive the two movable springs 13 to swing obliquely towards or away from the two drawing pieces 14 synchronously is as follows: based on the state that the multi-fracture relay is vertically placed, the two movable reeds 13 are respectively and transversely arranged above the two lead-out sheets 14; the two sets of driving mechanisms 3 each include a coil 30, a magnet core 31, a yoke 32 and an armature 33, the magnet core 31 is transversely inserted into the coil 30, the yoke 32 is transversely disposed beside the lower side of the coil 30 and is simultaneously connected with the tail end of the magnet core 31, the armature 33 is vertically disposed beside the head end of the magnet core 31, and meanwhile, the armature 33 is also rotationally connected with the rear end side of the yoke 32 and forms a rotation fulcrum at the joint, namely: the armature 33 is lever-type swingable around the rotation fulcrum;

the rear sides of the two movable springs 13 are respectively and fixedly connected with the lower ends of the two armatures 33 (namely, the execution ends of the driving mechanism 3), so that when the two coils 30 apply set voltages, the two armatures 33 can deflect forward, the upper ends of the two armatures 33 are respectively connected with the head ends of the two magnet cores 31 in an attracting way, and the lower ends of the two armatures 33 drive the two movable springs 13 to swing obliquely downwards; when both the coils 30 are powered off, the two armatures 33 can deflect reversely, so that the upper ends of the two armatures 33 are disconnected with the head ends of the two magnet cores 31 respectively, and the lower ends of the two armatures 33 drive the two movable springs 13 to tilt upwards and swing.

Still more preferably, the front end side of the yoke 32 is fixedly connected to the rear end of the magnet core 31 through a connection plate; a return spring is connected between the bottom wall of the yoke 32 and the lower part of the armature 33, and the return spring is used for providing elastic tension for forward deflection of the armature 33 so as to ensure that the movable contact and the fixed contact are communicated and attracted.

The armature 33 has a first vertically arranged section 330, a second horizontally arranged section 331, and a connecting section 332 connected between the first section 330 and the second section 331, wherein the first section 330 is in a shape of a regular flat plate (such as a square flat plate), the first section 330 is vertically disposed beside the head end of the magnet core 31, the connecting section 332 is rotationally connected with the rear end side of the yoke 32, and the second section 331 is disposed below the yoke 32 and fixedly connected with the rear side of the movable spring 13 through an injection molding piece.

In addition, in order to better realize that the actions of the at least two moving contacts 10 in each group of contact assemblies 1 respectively connected with or disconnected from the fixed contacts 11 matched with the moving contacts are asynchronous, the embodiment also performs the following optimization and improvement modes, such as: in a first optimization mode, the arrangement angle between the movable spring 13 and the armature 33 is optimally controlled, specifically: in this embodiment, the movable reed 13 is in a strip flat sheet shape extending along the first direction, and the intersecting angle between the center line of the length direction of the movable reed 13 and the vertical center line of the first section 330 is preferably controlled to be 60 ° to 90 °, and this angle range can ensure that the stroke of the armature 33 driving the movable reed 13 to deflect well meets the technical requirement of the attraction or disconnection of the movable contact and the static contact. The second optimization method is to optimally control the height of the static contact 11, specifically: the upper side surfaces of at least two fixed contacts 11 in each group of contact assemblies 1 are not in the same height plane, so that the technical requirements of the attraction or disconnection of the movable contact and the fixed contact are well met.

In addition, in order to further improve the reliability of the relay product, in this embodiment, the conductive member 12 is a flexible connection member, so when the moving contact and the fixed contact perform the actuation or disconnection action, if a clamping stagnation occurs between one group of moving contact and fixed contact, the existence of the flexible connection member will not affect the other group of moving contact and fixed contact, and the relay product still can realize part of functions, and will not cause complete failure, thereby improving the reliability of the product.

Further preferably, the flexible connection unit includes a wire 120 and two metal connectors 121 fixedly connected to two ends of the wire 120, wherein the wire 120 is a single-strand wire or a multi-strand wire; two metal connectors 121 are square copper tube heads, and two metal connectors 121 are respectively welded and fixedly connected with two ends of the wire 120, specifically: the metal connector 121 is fixedly pressed with one end of the wire 120 and then fixedly connected with the wire by welding, so that the connection strength between the metal connector 121 and the wire is ensured, and the loop resistance is reduced; simultaneously, the two metal connectors 121 are also riveted and fixedly connected with the moving contact A100 and the moving contact B101.

Furthermore, the flexible connection unit used as the conductive member 12 may be other embodiments than the above-mentioned "combination of the conductive wire 120 and the metal connector 121", such as: the flexible connecting piece is a flexible copper bar formed by stacking a plurality of copper foils, two ends of the flexible copper bar are respectively connected with the moving contact A100 and the moving contact B101, and the connection mode can be welding, riveting and the like. Further preferably, the thickness of each copper foil is 0.05-0.1 mm, so that the flexible copper bar has the advantages of thin size, space saving, good flexibility, large bending degree and the like, and the reliability of the product is better improved.

In conclusion, the multi-fracture relay provided by the utility model not only greatly reduces the unreliable risk caused by adhesion, but also effectively protects the contacts, so that the performance of the relay product is well optimized and improved, and the use risk of equipment is reduced.

In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The foregoing description is only of a preferred embodiment of the utility model, which can be practiced in many other ways than as described herein, so that the utility model is not limited to the specific implementations disclosed above. While the foregoing disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model without departing from the technical solution of the present utility model still falls within the scope of the technical solution of the present utility model.

Claims (16)

1. A multi-break relay, characterized in that: the contact assembly comprises two groups of contact assemblies (1), wherein the two groups of contact assemblies (1) are respectively provided with at least two moving contacts (10) which are arranged at intervals along a first direction and at least two fixed contacts (11) which are respectively arranged in a one-to-one opposite manner with the moving contacts (10), and at the same time, the at least two moving contacts (10) in one group of contact assemblies (1) are respectively connected with the at least two moving contacts (10) in the other group of contact assemblies (1) in series in a one-to-one correspondence manner, so that the two groups of contact assemblies (1) form at least two switch branches; and, the at least two switch branches are formed in parallel connection.

2. The multi-break relay according to claim 1, wherein: defining the moving contact in one group of the contact assemblies (1) as a moving contact A (100), and defining the moving contact in the other group of the contact assemblies (1) as a moving contact B (101); correspondingly, the fixed contacts which are arranged in a one-to-one opposite manner with the moving contacts A (100) are defined as fixed contacts A (110), and the fixed contacts which are arranged in a one-to-one opposite manner with the moving contacts B (101) are defined as fixed contacts B (111);

at least two moving contacts A (100) are respectively connected with at least two moving contacts B (101) in series in a one-to-one correspondence manner through conductive pieces (12); and the moving contact A (100) and the moving contact B (101) which are connected in series, the fixed contact A (110) which is opposite to the moving contact A (100) and the fixed contact B (111) which is opposite to the moving contact B (101) form one switch branch.

3. The multi-break relay according to claim 1, wherein: the contact assembly is provided with a driving mechanism (3), and the driving mechanism (3) can drive the two groups of contact assemblies (1) to synchronously act.

4. A multi-break relay according to claim 3, characterized in that: at least two moving contacts (10) in each group of contact assemblies (1) are respectively asynchronous with the action of sucking connection or disconnection of the fixed contacts (11) matched with the moving contacts.

5. The multi-break relay according to claim 4, wherein: the time sequence of the suction communication of at least two moving contacts (10) in each group of contact assemblies (1) and the fixed contacts (11) matched with the moving contacts is inversely proportional to the distance between the moving contacts (10) and the execution end of the driving mechanism (3), namely: the time of the suction communication of the moving contact (10) close to the execution end of the driving mechanism (3) and the fixed contact (11) is later than the time of the suction communication of the moving contact (10) far away from the execution end of the driving mechanism (3) and the fixed contact (11);

in addition, the time sequence of disconnection of at least two moving contacts (10) in each group of contact assemblies (1) and the fixed contacts (11) matched with the moving contacts is in direct proportion to the distance between the at least two moving contacts (10) and the execution end of the driving mechanism (3), namely: the time for disconnecting a moving contact (10) close to the actuating end of the driving mechanism (3) from the fixed contact (11) is earlier than the time for disconnecting a moving contact (10) far from the actuating end of the driving mechanism (3) from the fixed contact (11).

6. The multi-break relay according to claim 5, wherein: the movable contact device is provided with two movable contact springs (13), at least two movable contact contacts (10) which are arranged at intervals along the first direction are respectively arranged on the two movable contact springs (13), and the two movable contact springs (13) are respectively connected with the driving mechanism (3);

two leading-out sheets (14) are arranged, the two leading-out sheets (14) are respectively arranged in one-to-one opposite to the two movable contact springs (13), and at least two fixed contacts (11) which are arranged at intervals along the first direction are respectively arranged on the two leading-out sheets (14).

7. The multi-break relay according to claim 6, wherein: the two movable reeds (13) are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction;

correspondingly, the two lead-out sheets (14) are also arranged at intervals along the second direction.

8. The multi-break relay according to claim 6, wherein: at least two riveting holes A which are distributed at intervals along the first direction are respectively arranged on the two movable contact springs (13), and at least two movable contacts (10) are respectively riveted and fixed in the at least two riveting holes A;

at least two riveting holes B which are distributed at intervals along the first direction are respectively arranged on the two leading-out sheets (14), and at least two fixed contacts (11) are respectively riveted and fixed in the at least two riveting holes B.

9. The multi-break relay according to claim 6, wherein: the two groups of driving mechanisms (3) are used for driving the two groups of contact assemblies (1) to act independently.

10. The multi-break relay according to claim 9, wherein: the two groups of driving mechanisms (3) can drive the two movable reeds (13) to synchronously swing obliquely towards or back to the two leading-out sheets (14), so that at least two movable contacts (10) in each group of contact assemblies (1) are respectively asynchronous with the action of sucking connection or disconnection of the fixed contacts (11) matched with the movable contacts.

11. The multi-break relay according to claim 10, wherein: based on the state that the multi-fracture relay is vertically placed, two movable reeds (13) are respectively and transversely arranged above two leading-out sheets (14);

two sets of actuating mechanism (3) all include coil (30), magnet core (31), yoke (32) and armature (33), magnet core (31) transversely cartridge in coil (30), yoke (32) transversely set up in downside next door of coil (30) and simultaneously with the tail end of magnet core (31) is connected, armature (33) vertical set up in the head end next door of magnet core (31), simultaneously armature (33) still with the rear end side of yoke (32) rotates to be connected to form the rotation fulcrum in junction, namely: the armature (33) can swing in a lever manner around the rotation fulcrum;

the rear sides of the two movable springs (13) are fixedly connected with the lower ends of the two armatures (33) respectively, so that when the set voltage is applied to the two coils (30), the two armatures (33) can deflect positively, the upper ends of the two armatures (33) are in suction connection with the head ends of the two magnet cores (31) respectively, and the lower ends of the two armatures (33) drive the two movable springs (13) to swing obliquely downwards; when the two coils (30) are powered off, the two armatures (33) can deflect reversely, so that the upper ends of the two armatures (33) are disconnected with the head ends of the two magnet cores (31) respectively, and the lower ends of the two armatures (33) drive the two movable reeds (13) to tilt upwards and swing.

12. The multi-break relay according to claim 11, wherein: the front end side of the yoke (32) is fixedly connected with the tail end of the magnet core (31) through a connecting plate; a return spring is connected between the bottom wall of the yoke (32) and the lower part of the armature (33);

the armature (33) is provided with a first section (330) which is vertically arranged, a second section (331) which is horizontally arranged and a connecting section (332) which is connected between the first section (330) and the second section (331), wherein the first section (330) is vertically arranged beside the head end of the magnet core (31), the connecting section (332) is rotationally connected with the rear end side of the yoke (32), and the second section (331) is arranged below the yoke (32) and fixedly connected with the rear side of the movable spring (13) through an injection molding piece.

13. The multi-break relay according to claim 11, wherein: the upper sides of at least two fixed contacts (11) in each group of contact assemblies (1) are not in the same height plane.

14. The multi-break relay according to claim 2, wherein: the conductive piece (12) adopts a flexible connecting piece, the flexible connecting piece comprises a wire (120) and two metal connectors (121) which are respectively and fixedly connected to two ends of the wire (120), and the two metal connectors (121) are respectively used for being connected with the moving contact A (100) and the moving contact B (101).

15. The multi-break relay according to claim 14, wherein: the wire (120) adopts a single-strand wire or a multi-strand wire;

the metal connector (121) adopts square copper tube head, metal connector (121) with wire (120) one end welding links firmly, simultaneously metal connector (121) still with moving contact A (100) or moving contact B (101) riveting links firmly.

16. The multi-break relay according to claim 2, wherein: the conductive piece (12) adopts a flexible connecting piece, the flexible connecting piece is a flexible copper bar formed by stacking a plurality of copper foils, and two ends of the flexible copper bar are respectively connected with the moving contact A (100) and the moving contact B (101).

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