CN115440539A

CN115440539A - Magnetic latching relay

Info

Publication number: CN115440539A
Application number: CN202210319393.7A
Authority: CN
Inventors: 钟叔明; 代文广; 李方能; 郑增光
Original assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Current assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-12-06

Abstract

The invention discloses a magnetic latching relay, which comprises a coil assembly and an armature assembly, wherein the coil assembly comprises a coil main body and two yokes arranged on the coil main body; one end of one yoke iron is matched between one ends of the two armatures, and one end of the other yoke iron is matched between the other ends of the two armatures; each yoke iron is respectively matched with the two armatures to form a concave-convex component for reducing the magnetic gap, the concave-convex component comprises a convex part arranged on one of the yoke iron and the armatures and a concave part arranged on the other of the yoke iron and the armatures, and the convex part is opposite to the concave part; when each yoke iron is mutually attracted with the corresponding armature iron, the convex part on the attraction part is embedded into the concave part. The invention increases the coil attraction by reducing the magnetic gap between the armature and the yoke, reduces the action and/or reset voltage of the relay, and improves the closing and/or breaking speed of the relay.

Description

Magnetic latching relay

Technical Field

The invention relates to the technical field of relays, in particular to a magnetic latching relay.

Background

The magnetic circuit system of the magnetic latching relay in the prior art comprises a coil assembly and an armature assembly, wherein the coil assembly comprises a coil main body and two yokes arranged at two ends of the coil main body; one end of one yoke iron is positioned between one ends of the two pieces of armature irons, and one end of the other yoke iron is positioned between the other ends of the two pieces of armature irons. When the coil is driven by rated voltage, one end of each armature iron generates repulsion with the yoke iron, and the other end generates attraction with the yoke iron, thereby realizing the function of rotary switching. The closing and/or breaking speed of the relay can be improved by improving the magnetic efficiency of the magnetic loop of the relay, the action and/or resetting voltage of the relay are/is reduced, the weight of the enameled wire is reduced, and the cost of the relay is greatly reduced. However, the magnetic latching relay in the prior art cannot improve the magnetic efficiency of the coil assembly on the basis of not changing the size of the coil assembly, the size of the armature assembly and the like.

Disclosure of Invention

The invention provides a magnetic latching relay, aiming at the technical problems in the prior art, which reduces the magnetic gap between an armature and a yoke by improving the structures of an armature component and a coil component so as to improve the attraction of the coil.

The technical scheme adopted by the invention for solving the technical problems is as follows: a magnetic latching relay comprises a coil assembly and an armature assembly rotatably arranged on one side of the coil assembly, wherein the coil assembly comprises a coil main body and two yokes arranged on the coil main body; one end of one yoke iron is matched between one ends of the two armature irons; one end of the other yoke iron is matched between the other ends of the two armatures; each yoke iron is respectively matched with the two armatures to form a concave-convex component for reducing the magnetic gap, the concave-convex component comprises a convex part arranged on one of the yoke iron and the armatures and a concave part arranged on the other of the yoke iron and the armatures, and the convex part is opposite to the concave part; when each yoke iron is mutually attracted with the corresponding armature iron, the convex part on the attraction part is embedded into the concave part.

The invention also provides a magnetic latching relay, which comprises a coil assembly and an armature assembly rotationally arranged on one side of the coil assembly, wherein the coil assembly comprises a coil main body and two yokes arranged on the coil main body; one end of one yoke iron is matched between one ends of the two armatures; one end of the other yoke iron is matched between the other ends of the two armatures; one yoke iron and one armature iron are matched with a concave-convex component for reducing the magnetic gap, and the other yoke iron and the other armature iron are matched with a concave-convex component for reducing the magnetic gap; the concave-convex assembly comprises a convex part arranged on one of the yoke iron and the armature iron and a concave part arranged on the other of the yoke iron and the armature iron, and the convex part is opposite to the concave part; when one yoke iron and one armature iron are mutually attracted and the other yoke iron and the other armature iron are mutually attracted, the convex part is embedded into the concave part.

Furthermore, both ends of each armature are respectively provided with a convex part, and one end of each yoke is respectively provided with a concave part.

Furthermore, convex parts are respectively arranged on two opposite surfaces of one end of each yoke in the thickness direction, and concave parts are respectively arranged at two ends of each armature.

Furthermore, a convex part and a concave part are respectively arranged on two opposite surfaces of one end of each yoke in the thickness direction, a concave part matched with the convex part is arranged on the armature facing the convex part of the yoke, and a convex part matched with the concave part is arranged on the armature facing the concave part of the yoke.

Furthermore, the concave part at one end of each yoke penetrates through two surfaces of the yoke in the thickness direction, the convex parts at one ends of the two armatures are opposite, and the convex parts at the other ends of the two armatures are opposite.

Furthermore, one end of one of the yokes is provided with a convex part towards one surface of one of the armatures, and one end of the other yoke is provided with a convex part towards one surface of the other armature; one end of one armature is provided with a concave part, and one end of the other armature is provided with a concave part, or both ends of each armature are respectively provided with a concave part.

Furthermore, one end of one armature is provided with a convex part, the other end of the other armature is provided with a convex part, and one end of each yoke iron is provided with a concave part.

Further, the convex part is a convex bract or a convex boss formed by punching the part where the convex part is located, or the convex part is an iron column riveted on the part where the convex part is located; the concave part is a notch or a groove or a through hole; the number of the convex parts and the concave parts of each concave-convex assembly is one, or the number of the convex parts and the concave parts of each concave-convex assembly is at least two, and the convex parts correspond to the concave parts one by one.

The coil component is arranged on the base, and the armature component is rotatably connected to the base; one end of the pushing card is fixed on the containing body of the armature component, and the other end of the pushing card is connected with the movable reed of the movable spring part.

Compared with the prior art, the invention has the following beneficial effects:

the concave-convex assembly is matched with each yoke iron and the corresponding armature iron, so that under the condition of not influencing the retention force of the armature iron, the action and the resetting stroke of the relay can be ensured to be unchanged, the magnetic gap between the armature iron and the yoke iron can be reduced, the magnetic efficiency of a magnetic circuit is improved, the suction force of a coil is increased, the closing and/or breaking speed of the relay is further improved, the action and/or the resetting time of the relay is reduced, the action and/or the resetting voltage of the relay is reduced, the weight of an enameled wire is reduced, and the cost of the relay is reduced.

The invention is further explained in detail with the accompanying drawings and the embodiments; a magnetic latching relay of the present invention is not limited to the embodiment.

Drawings

FIG. 1 is a schematic perspective view (without housing) of the present invention according to an embodiment of the present invention;

FIG. 2 is a top view of the magnetic circuit system and the contact system of the present invention in an active state;

fig. 3 is a schematic perspective view of a coil assembly and an armature assembly of the present invention in an actuated state according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of an armature according to the first embodiment of the present invention;

fig. 5 is a perspective view schematically illustrating a yoke according to an embodiment of the present invention;

FIG. 6 is a top view of the coil assembly and armature assembly of one embodiment of the present invention in an actuated state;

FIG. 7 is a top view of a prior art coil assembly and armature assembly in an actuated state;

fig. 8 is a schematic perspective view of an armature of the present invention according to a second embodiment;

fig. 9 is a schematic perspective view of a yoke according to a second embodiment of the present invention;

fig. 10 is a top view of a magnetic circuit system and a contact system according to a second embodiment of the present invention in an operating state;

fig. 11 is a schematic perspective view of a coil assembly and an armature assembly of a second embodiment of the present invention in an actuated state;

fig. 12 is a schematic perspective view of an armature of a second embodiment of the present invention;

fig. 13 is a schematic perspective view of an armature assembly of the present invention in accordance with a third embodiment;

fig. 14 is a schematic perspective view of an armature of an embodiment of the present invention;

fig. 15 is a schematic perspective view of an armature assembly of the present invention in accordance with a fourth embodiment of the present invention;

fig. 16 is a schematic perspective view of a coil assembly and an armature assembly of the present invention in an actuated state according to a fourth embodiment;

fig. 17 is a plan view of a magnetic circuit system and a contact system according to a fifth embodiment of the present invention in an operating state;

fig. 18 is a schematic perspective view of a coil assembly and an armature assembly of a fifth embodiment of the present invention in an actuated state;

fig. 19 is a schematic perspective view of a coil block according to the sixth embodiment of the present invention;

fig. 20 is a schematic perspective view of an armature of an embodiment of the present invention;

fig. 21 is a schematic perspective construction of an armature assembly of an embodiment of the invention;

fig. 22 is a top view of a coil assembly and armature assembly of a sixth embodiment of the present invention in an actuated state;

fig. 23 is a schematic perspective view of a coil block according to the present invention;

fig. 24 is a schematic perspective view of an armature assembly of the present invention in accordance with a seventh embodiment;

fig. 25 is a schematic perspective view of an example coil assembly and armature assembly of an eighth invention in the actuated state;

fig. 26 is a schematic perspective view of a coil assembly and armature assembly of an embodiment of the present invention in an actuated state;

fig. 27 is a top view of an embodiment of a coil assembly and armature assembly of the present invention in an actuated state;

fig. 28 is a top view of an embodiment of a coil assembly and armature assembly of the present invention in a reset state.

Detailed Description

In the description of the present application, "at least two" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.

Example one

Referring to fig. 1-6, a magnetic latching relay according to the present invention includes a base 3, a contact system, a magnetic circuit system, a push card 6 and a housing (not shown), wherein the contact system includes a movable spring portion 4 and a stationary spring portion 5 disposed on the base 3, and the magnetic circuit system includes a coil assembly 1 and an armature assembly 2 rotatably disposed on one side of the coil assembly 1. The coil assembly 1 includes a coil body 11 and two yokes 12 arranged on the coil body 11, the coil body 11 includes a coil rack, an enameled wire wound on the coil rack, and an iron core arranged in the coil rack in a penetrating manner, the two yokes 12 are respectively substantially L-shaped, one side of each of the two yokes 12 is riveted and fixed with two ends of the iron core, and the other side of each of the two yokes 12 is located on the same side of the coil rack and is arranged oppositely. The armature assembly 2 comprises two armatures 21, a permanent magnet (not shown in the figure) and an accommodating body 22, wherein the permanent magnet is overlapped between the two armatures 21 to form an I shape and is fixed together by the accommodating body 22, and specifically, the two armatures 21 and the permanent magnet are fixed together by the accommodating body 22 in an injection molding mode. One end of one yoke (i.e., the end at which the other side of the yoke is located) is fitted between one ends of the two armatures 21, and one end of the other yoke (i.e., the end at which the other side of the yoke is located) is fitted between the other ends of the two armatures 21. The coil component 1 is horizontally arranged on a base 3, and the armature component 2 is rotatably connected to the base 3; one end of the pushing card 6 is fixed on the containing body 22 of the armature component 2, and the other end of the pushing card 6 is connected with the movable reed of the movable reed part 4. Each yoke 12 is fitted with the two armatures 21 respectively to form a male-female assembly including a male portion provided on one of the yoke 12 and the armature 21 and a female portion provided on the other of the yoke 12 and the armature 21, the male portion being opposed to the female portion, and the male portion on the engaging portion is fitted into the female portion when each yoke 12 is engaged with the corresponding armature respectively. The attraction part refers to the part where the yoke iron and the armature iron attract each other.

In the present embodiment, the two ends of each armature 21 are respectively provided with a convex portion, one end of each yoke 12 is respectively provided with a concave portion, the concave portion at one end of each yoke 12 penetrates through two surfaces of the yoke 12 in the thickness direction, the convex portions at one ends of the two armatures 21 are opposite, and the convex portions at the other ends of the two armatures 21 are opposite. The one end and the other end of the armature 21 refer to both ends of the armature 21 in the length direction thereof, and both ends of the armature 21 refer to both ends of the armature 21 in the length direction thereof. The two armatures 21 are provided with the same structure, so that the two armatures 21 can share the same auxiliary stamping die, and the production cost is reduced.

In this embodiment, the number of the convex portion and the concave portion of the concave-convex assembly is one, and the convex portion is located at the middle position of the end portion where the convex portion is located, and the convex portion is a convex bud 211, as shown in fig. 4, which is cylindrical and formed by punching a corresponding portion on the armature 21. The recess is a U-shaped notch 121, as shown in fig. 5, but not limited thereto, and in other embodiments, the recess is a groove or a through hole.

In the magnetic latching relay for improving the coil attraction force, after the armature assembly 2 and the coil assembly 1 are improved, the magnetic gap between each armature 21 and the yoke 12 is the distance a between the convex part (i.e. the convex bud 211) on the armature 21 and the yoke 12, as shown in fig. 6. For the magnetic latching relay with the same structure and the same size in the prior art, the magnetic gap between each armature and the yoke is the distance a 'between the magnetic attraction surfaces of the armature and the yoke, as shown in fig. 7, obviously, the distance a is smaller than the distance a', therefore, compared with the magnetic latching relay in the prior art, the magnetic gap between the armature 21 and the yoke 12 can be greatly reduced, and the larger the magnetic gap is, the lower the magnetic efficiency of the magnetic circuit is, the smaller the attraction force of the coil is, and the closing/breaking speed of the relay is finally influenced, and the action/resetting voltage of the relay is influenced. Therefore, after the magnetic gap between the armature 21 and the yoke 12 is reduced, the magnetic efficiency of the magnetic circuit is improved, the attraction force of the coil is increased, so that the closing and breaking speed of the relay is improved, the action/reset time of the relay is reduced, the anti-adhesion capability of the product is improved, the action and reset voltage of the relay can be reduced, the wire diameter of the enameled wire can be reduced, the weight of the enameled wire is reduced, and the purpose of reducing the cost of the relay is achieved. The corresponding concave part and the convex part are mutually embedded when the magnet is attracted with the corresponding yoke 12, so that the invention can ensure that the action and the resetting stroke of the relay are not changed. The arrangement of the concave/convex part occupies a small part of the overlapping area of the armature and the yoke, but as long as the effective magnetic flux per unit cross-sectional area of the iron piece and the effective overlapping area of the armature and the yoke reach basic requirements, the invention does not influence the retaining force of the armature in the action/resetting state of the relay.

Example two

Referring to fig. 8 to fig. 11, a magnetic latching relay according to the present invention is different from the first embodiment in that: two convex bracts 211 are respectively arranged at two ends of each armature 21, and the two convex bracts 211 are distributed along the width direction of the armature 21, as shown in fig. 8; one end of each yoke 12 is provided with two notches 121, and the two notches 121 are distributed along the width direction of the yoke 12, and each notch is L-shaped, as shown in fig. 9. The protrusions 211 correspond to the notches 121 one by one.

The magnetic latching relay can also greatly reduce the magnetic gap between the armature 21 and the yoke 12, thereby greatly improving the magnetic efficiency of the magnetic circuit of the invention and increasing the coil attraction force, so that the invention not only can increase the closing and breaking speed of the relay and improve the anti-sticking capability of the product, but also can reduce the action and resetting voltage of the relay, further can reduce the weight of enameled wires of the relay and achieve the purpose of reducing the cost of the relay. The invention can also ensure the action and the resetting stroke of the relay to be unchanged.

EXAMPLE III

Referring to fig. 12 and 13, a magnetic latching relay according to the present invention is different from the first embodiment in that: the convex portions at the two ends of each armature 21 are bosses 212, and the bosses 212 are in a square shape, but not limited thereto.

The magnetic latching relay can also greatly reduce the magnetic gap between the armature 21 and the yoke 12, thereby greatly improving the magnetic efficiency of the magnetic circuit of the invention, increasing the coil attraction force, not only increasing the closing and breaking speed of the relay and improving the anti-sticking capability of the product, but also reducing the action and resetting voltage of the relay, further reducing the weight of enameled wires of the relay and achieving the purpose of reducing the cost of the relay. The invention can also ensure the action and the resetting stroke of the relay to be unchanged.

Example four

Referring to fig. 14 to 16, a magnetic latching relay according to the present invention is different from the third embodiment in that: the number of the bosses 212 at both ends of each armature 21 is two, and is distributed along the width direction of the armature 21, as shown in fig. 14 and 15. One end of each yoke 12 is provided with two notches 121, and the two notches 121 are distributed along the width direction of the yoke 12, and each notch is L-shaped, as shown in fig. 16. The bosses 212 correspond to the notches 121 one to one.

EXAMPLE five

Referring to fig. 17 and 18, a magnetic latching relay according to the present invention is different from the third embodiment in that: the convex portions at two ends of the armature 21 are respectively iron posts 213 riveted on the armature 21, and the number of the iron posts 213 at two ends of the armature 21 is respectively one, but the invention is limited to this, and in other embodiments, the number of the iron posts at two ends of the armature is respectively at least two, and the iron posts are distributed along the width direction of the armature.

In this embodiment, the recess of the yoke 12 is a U-shaped notch 121, but not limited thereto, and in other embodiments, the recess of the yoke is a groove or a through hole.

The magnetic latching relay can also greatly reduce the magnetic gap between the armature 21 and the yoke 12, thereby greatly improving the magnetic efficiency of the magnetic circuit of the invention, increasing the coil attraction force, not only increasing the closing and breaking speed of the relay and improving the anti-sticking capability of the product, but also reducing the action and resetting voltage of the relay, further reducing the weight of enameled wires of the relay and achieving the purpose of reducing the cost of the relay. The invention can also ensure that the action and the resetting stroke of the relay are not changed.

EXAMPLE six

Referring to fig. 19 to fig. 22, a magnetic latching relay according to the present invention is different from the above embodiments in that: one yoke 12 and one armature 21 are matched with a concave-convex component, and the other yoke 12 and the other armature 21 are matched with a concave-convex component; the male-female assembly includes a male portion provided to one of the yoke 12 and the armature 21, and a female portion provided to the other of the yoke 12 and the armature 21, the male portion being opposite to the female portion; when one yoke iron and one armature iron are mutually attracted and the other yoke iron and the other armature iron are mutually attracted, the convex part is embedded into the concave part.

In the present embodiment, one end of the one yoke 12 faces one surface of the one armature 21, and one end of the other yoke 12 faces one surface of the other armature 21. Both ends of each armature 21 are respectively provided with a concave portion, but not limited thereto, and in other embodiments, one end of the one armature is provided with a concave portion, and one end of the other armature is provided with a concave portion. In other embodiments, one end of the armature is provided with a convex portion, the other end of the other armature is provided with a convex portion, and one end of each yoke is provided with a concave portion.

In this embodiment, the number of the convex and concave portions of the concave-convex assembly is one, and the convex portion is a convex bud 122, as shown in fig. 19, which is cylindrical and formed by punching corresponding portions of the yoke 12. The recess is a U-shaped notch 214 located intermediate the ends of the armature 21, as shown in fig. 20 and 21, but not limited thereto, and in other embodiments the recess is a groove or a through hole.

The invention can reduce the magnetic gap between one side of the yoke 12 and the armature 21 after the armature assembly 2 and the coil assembly 1 of the magnetic latching relay for improving the coil attraction, therefore, the invention can be arranged to improve the coil attraction in the breaking state or the closing state according to the actual requirement, and because the coil attraction required by the relay in the breaking state is larger, the invention is preferably arranged to improve the coil attraction in the breaking state,

the magnetic latching relay can increase the breaking speed of the relay, improve the anti-sticking capability of a product, reduce the reset voltage of the relay, further reduce the weight of an enameled wire of the relay and achieve the purpose of reducing the cost of the relay. The invention can also ensure the action and the resetting stroke of the relay to be unchanged.

EXAMPLE seven

Referring to fig. 23 and 24, a magnetic latching relay according to the present invention is different from the sixth embodiment in that: two bracts 122 are respectively arranged on each yoke 12 and distributed along the width direction of the yoke 12, as shown in fig. 23; two notches 214 are respectively arranged at two ends of each armature 21, the two notches 214 are respectively distributed along the width direction of the armature 21, and each notch 214 is respectively in an L shape, as shown in FIG. 24. The protrusions 122 correspond to the notches 214 one by one.

Example eight

Referring to fig. 25, a magnetic latching relay according to the present invention is different from the sixth embodiment in that: the convex portion of each yoke 12 is a boss 123, and the boss 123 is square, but not limited thereto.

Example nine

Referring to fig. 26, a magnetic latching relay according to the present invention is different from the eighth embodiment in that: the number of the bosses 123 on each yoke 12 is two, and the bosses are distributed along the width direction of the yoke 12; two notches 214 are respectively arranged at two ends of each armature 21, the two notches 214 are respectively distributed along the width direction of the armature 21, and each notch is respectively in an L shape. The bosses 123 correspond to the notches 214 one by one.

Example ten

Referring to fig. 27 and 28, a magnetic latching relay according to the present invention is different from the first embodiment in that: one end of each yoke 12 is provided with a convex part and a concave part on two opposite surfaces in the thickness direction, the armature 21 facing the convex part of the yoke 12 is provided with a concave part matched with the convex part, and the armature 21 facing the concave part of the yoke 12 is provided with a convex part matched with the concave part.

In this embodiment, the number of the convex portions and the concave portions of the concave-convex assembly is one, and the concave portions are located at the middle position of the end portion where the convex portions and the concave portions are located, but the concave-convex assembly is not limited to this. The convex part is the convex bract 121/211 formed by punching the part where the convex part is located, but the convex part is not limited to the convex bract, and in other embodiments, the convex part is a convex plate, or the convex part is an iron column riveted on the part where the convex part is located. The recess is a notch, but not limited thereto, and in other embodiments, the recess is a groove or a through hole.

In a magnetic latching relay according to the present invention, as shown in fig. 27, the operating states of the coil block 1 and the coil block 1 are such that the magnetic gap between the armature 21 and the yoke 12 is defined by a distance B between the bracts 121 on the yoke 12 and the armature 21 facing the bracts 121; the return state of the coil block 1 and the coil block 1 is shown in fig. 28, and at this time, the magnetic gap between the armature 21 and the yoke 12 is the distance C between the bracts 211 on the armature 21 and the yoke 12 facing the bracts 211. Obviously, the distance B and the distance C are respectively smaller than the distance a' shown in fig. 7, so that the magnetic gap between the armature 21 and the yoke 12 can be greatly reduced compared with the magnetic latching relay in the prior art, thereby improving the magnetic efficiency of the magnetic circuit and increasing the coil attraction force. Therefore, the invention can not only increase the closing and breaking speed of the relay, reduce the action and resetting time of the relay, improve the anti-adhesion capability of the product, but also reduce the action and resetting voltage of the relay, thereby reducing the wire diameter of the enameled wire, reducing the weight of the enameled wire and achieving the purpose of reducing the cost of the relay. Because the corresponding concave part and the convex part are mutually embedded when the magnet is attracted with the corresponding yoke iron 12, the invention can ensure that the action and the resetting stroke of the relay are not changed.

The parts which are not involved in the magnetic latching relay are the same as or can be realized by the prior art.

The above embodiments are only used to further illustrate a magnetic latching relay of the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention fall within the protection scope of the technical solution of the present invention.

Claims

1. A magnetic latching relay comprises a coil assembly and an armature assembly rotatably arranged on one side of the coil assembly, wherein the coil assembly comprises a coil main body and two yokes arranged on the coil main body; one end of one yoke iron is matched between one ends of the two armatures, and one end of the other yoke iron is matched between the other ends of the two armatures; the method is characterized in that: each yoke is respectively matched with the two armatures to form a concave-convex assembly, the concave-convex assembly comprises a convex part arranged on one of the yoke and the armatures and a concave part arranged on the other of the yoke and the armatures, and the convex part is opposite to the concave part; when each yoke iron is mutually attracted with the corresponding armature iron, the convex part on the attraction part is embedded into the concave part.

2. A magnetic latching relay comprises a coil assembly and an armature assembly rotationally arranged on one side of the coil assembly, wherein the coil assembly comprises a coil main body and two yokes arranged on the coil main body; one end of one yoke iron is matched between one ends of the two armatures, and one end of the other yoke iron is matched between the other ends of the two armatures; the method is characterized in that: one yoke iron and one armature iron are matched with a concave-convex component, and the other yoke iron and the other armature iron are matched with a concave-convex component; the concave-convex assembly comprises a convex part arranged on one of the yoke iron and the armature iron and a concave part arranged on the other of the yoke iron and the armature iron, and the convex part is opposite to the concave part; when one yoke iron and one armature iron are mutually attracted and the other yoke iron and the other armature iron are mutually attracted, the convex part is embedded into the concave part.

3. The magnetic latching relay of claim 1, wherein: the two ends of each armature are respectively provided with a convex part, and one end of each yoke is respectively provided with a concave part.

4. The magnetic latching relay of claim 1, wherein: convex parts are respectively arranged on two opposite surfaces of one end of each yoke in the thickness direction, and concave parts are respectively arranged at two ends of each armature.

5. The magnetic latching relay of claim 1, wherein: one end of each yoke is respectively provided with a convex part and a concave part on two opposite surfaces in the thickness direction, the armature facing the convex part of the yoke is provided with a concave part matched with the convex part, and the armature facing the concave part of the yoke is provided with a convex part matched with the concave part.

6. A magnetic latching relay according to claim 3, characterized in that: and the concave part at one end of each yoke iron penetrates through two surfaces of the yoke iron in the thickness direction, the convex parts at one ends of the two armatures are opposite, and the convex parts at the other ends of the two armatures are opposite.

7. The magnetic latching relay of claim 2, wherein: one end of one of the yokes is provided with a convex part towards one surface of one armature, and one end of the other yoke is provided with a convex part towards one surface of the other armature; one end of one armature is provided with a concave part, and one end of the other armature is provided with a concave part, or two ends of each armature are respectively provided with a concave part.

8. The magnetic latching relay of claim 2, wherein: one end of one armature is provided with a convex part, the other end of the other armature is provided with a convex part, and one end of each yoke iron is respectively provided with a concave part.

9. A magnetic latching relay according to any of claims 1-8, characterized in that: the convex part is a convex bract or a convex boss formed by stamping the part where the convex part is located, or the convex part is an iron column riveted on the part where the convex part is located; the concave part is a notch or a groove or a through hole; the number of the convex parts and the concave parts of each concave-convex assembly is one, or the number of the convex parts and the concave parts of each concave-convex assembly is at least two, and the convex parts correspond to the concave parts one by one.

10. A magnetic latching relay according to any of claims 1-8, characterized in that: the coil component is arranged on the base, and the armature component is rotatably connected to the base; one end of the pushing card is fixed on the containing body of the armature component, and the other end of the pushing card is connected with the movable reed of the movable spring part.