CN117198814A

CN117198814A - Magnetic latching relay

Info

Publication number: CN117198814A
Application number: CN202311377045.6A
Authority: CN
Inventors: 代文广; 廖国进; 钟叔明; 李方能
Original assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Current assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Priority date: 2023-10-23
Filing date: 2023-10-23
Publication date: 2023-12-08
Also published as: WO2025087127A1

Abstract

The embodiment of the invention provides a magnetic latching relay, which comprises: comprises a base, a contact structure, a first static spring leading-out piece, a coil component and a magnetic circuit structure. The contact structure is arranged on the base and is provided with a first end and a second end in the transverse direction, the first end is provided with a first contact set, and the second end is provided with a second contact set; one end of the first static spring leading-out piece is connected with the first end, and the other end extends out of the base along the vertical direction from the bottom of the base; the coil component and the magnetic circuit structure are arranged on the base and are positioned at one side of the contact structure in the longitudinal direction; when pulse voltage is applied to the coil assembly, the magnetic circuit structure and the coil assembly can form a constant magnetic field, a first central line of the constant magnetic field in the longitudinal direction deviates from a second central line between the first contact set and the second contact set and is closer to the second contact set, so that the constant magnetic field is far away from the first static spring leading-out piece. The magnetic latching relay has higher stability.

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 latching relay is an electronic switch which plays a role in switching on and off a load circuit. When pulse voltage is applied to the coil of the magnetic latching relay, the magnetic circuit structure of the magnetic latching relay generates a constant magnetic field, and the magnetic latching relay is kept in a closed or open state due to the action of the constant magnetic field. The magnetic latching relay comprises a leading-out end which is used for being electrically connected with an external load, the leading-out end extends along the direction perpendicular to the base, and under the condition that the load current is connected, the leading-out end can generate an alternating magnetic field which is at least partially coplanar with a constant magnetic field generated by the magnetic circuit structure due to the fact that the load current is alternating current.

And because the distance between part of the leading-out ends and the magnetic circuit structure is relatively close, when the direction of the magnetic induction line of the alternating magnetic field is opposite to that of the magnetic induction line of the constant magnetic field, the constant magnetic field is weakened, and when the directions are the same, the stability of the constant magnetic field is disturbed, and especially under a high-current environment, the magnetic latching relay is possibly disconnected, so that the magnetic latching relay is unstable in use.

The above information disclosed in the background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the related art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The embodiment of the invention provides a magnetic latching relay, which can avoid the influence of an alternating magnetic field and improve the stability of the magnetic latching relay.

The embodiment of the invention provides a magnetic latching relay which comprises a base, a contact structure, a first static spring leading-out piece, a coil assembly and a magnetic circuit structure. The contact structure is arranged on the base and is provided with a first end and a second end in the transverse direction, the first end is provided with a first contact set, and the second end is provided with a second contact set; one end of the first static spring leading-out piece is connected with the first end, and the other end extends out of the base along the vertical direction from the bottom of the base; the coil component and the magnetic circuit structure are arranged on the base and are positioned at one side of the contact structure in the longitudinal direction; when pulse voltage is applied to the coil assembly, the magnetic circuit structure and the coil assembly can form a constant magnetic field, and a first central line of the constant magnetic field in the longitudinal direction deviates from a second central line between the first contact set and the second contact set and is closer to the second contact set, so that the constant magnetic field is far away from the first static spring leading-out piece.

In some embodiments of the invention, the coil assembly includes: the coil rack is arranged on the base; a coil wound around the bobbin; an iron core located in the bobbin; wherein the first centerline passes through a center of the bobbin.

In some embodiments of the invention, the magnetic circuit structure comprises: a permanent magnet swingably provided on the base; the armature is arranged on the permanent magnet and protrudes out of the permanent magnet in the transverse direction; the first yoke and the second yoke are fixed on the base and are positioned on two opposite sides of the coil assembly, one end of the first yoke is connected with one end of the iron core, and the other end of the first yoke can be in contact connection with one end of the armature; one end of the second yoke is connected with the other end of the iron core, and the other end of the second yoke can be in contact connection with the other end of the armature; when a pulse voltage is applied to the coil, the permanent magnet swings to one side, the constant magnetic field is generated at the permanent magnet, the armature, the first yoke, the iron core and the second yoke, and the first center line of the constant magnetic field passes through the center of the permanent magnet.

In some embodiments of the present invention, the first stationary spring lead-out member includes a first lead-out portion connected to the first end of the contact structure and a second lead-out portion connected to the first lead-out portion and extending from the bottom of the base in the vertical direction; the first lead-out portion has a guide groove extending from a side of the first lead-out portion near the second end in the lateral direction without penetrating the first lead-out portion, and an opening of the guide groove faces the second contact group.

In some embodiments of the present invention, a depth dimension of the guide groove in the lateral direction is 1/3 to 1/2 of a dimension of the first lead-out portion in the lateral direction.

In some embodiments of the invention, the first contact set includes a first stationary contact and a first movable contact, and the second contact set includes a second stationary contact and a second movable contact; the contact structure has a first reed extending in the transverse direction, the first end of the first reed having two of the first stationary contacts, the second end of the first reed having two of the second movable contacts, the first reed having a slot extending in the transverse direction from the second end of the first reed to between the two of the first stationary contacts; the guide groove of the first stationary spring guide is located between the two first stationary contacts.

In some embodiments of the present invention, the contact structure further has a second reed juxtaposed with the first reed, the first end of the second reed has two first movable contacts corresponding to the two first fixed contacts, respectively, and the second end of the second reed has two second fixed contacts corresponding to the two second movable contacts, respectively.

In some embodiments of the invention, the distance between the first centerline and the second centerline is 6-9 mm.

In some embodiments of the invention, the magnetic latching relay further comprises: and one end of the second static spring leading-out piece is connected with the second end, and the other end of the second static spring leading-out piece extends from the second end along the transverse direction to a direction far away from the first contact group and extends out from the side wall of the base.

In some embodiments of the invention, the magnetic latching relay further comprises: the leading-out pin is positioned outside the base, extends along the vertical direction, and one end of the leading-out pin is connected with one end of the second static spring leading-out piece positioned outside the base; the distance from the leading-out pin to the second contact set is larger than the distance from the first static spring leading-out piece to the first contact set.

In some embodiments of the invention, the magnetic latching relay further comprises: and the part of the second static spring leading-out piece, which extends out of the base, penetrates through the alternating current transformer, so that the alternating current transformer is positioned between the leading-out pin and the second contact group.

In some embodiments of the invention, the base has first and second laterally opposite sidewalls, the first sidewall being proximate the first end of the contact structure and the second sidewall being proximate the second end of the contact structure; wherein a portion of the first sidewall that does not correspond to the contact structure in the lateral direction is recessed inward, and a portion of the second sidewall that does not correspond to the contact structure in the lateral direction is protruding outward.

In some embodiments of the invention, the magnetic latching relay further comprises: the first pushing card is positioned in the base and is close to the first side wall, and one end of the first pushing card is connected with a first movable contact in the first contact group of the contact structure; the second pushing card is positioned in the base and is close to the second side wall, one end of the second pushing card is connected with a second movable contact in the second contact group of the contact structure, and a part of the second pushing card, which does not correspond to the pushing structure, protrudes towards the direction close to the second side wall.

According to the technical scheme, the invention has at least one of the following advantages and positive effects:

in the embodiment of the invention, when the alternating current of the load is connected, the alternating magnetic field generated by the first static spring leading-out part may influence the constant magnetic field generated by the magnetic circuit structure.

Drawings

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

FIG. 1 is a schematic top view of a magnetic latching relay according to some embodiments of the present invention;

FIG. 2 is a schematic top view of a magnetic latching relay (with the injection molded part removed) according to some embodiments of the present invention;

FIG. 3 is a schematic perspective view of a magnetic latching relay according to some embodiments of the present invention;

FIG. 4 is a schematic perspective view of a magnetic latching relay (with the base removed and the pusher card removed) according to some embodiments of the present invention;

FIG. 5 is a schematic top view of a magnetic latching relay (with the base removed) shown in some embodiments of the present invention;

FIG. 6 is a schematic view of a first stationary spring lead-out member and a first reed according to some embodiments of the present invention;

fig. 7 is a schematic perspective view of a magnetic latching relay (with the base removed and the push card added and the ac transformer) according to some embodiments of the present invention.

Reference numerals illustrate:

1. a base; 11. a first sidewall; 12. a second sidewall; 2. a contact structure; 21. a first end; 211. a first movable contact; 212. a first stationary contact; 22. a second end; 221. a second movable contact; 222. a second stationary contact; 201. a first reed; 202. a second reed; 203. slotting; 3. a first stationary spring lead-out member; 31. a first lead-out portion; 32. a second lead-out portion; 33. a guide groove; 4. a second stationary spring lead-out member; 5. a pin; 6. a coil assembly; 61. a coil former; 62. a coil; 63. an iron core; 7. a magnetic circuit structure; 71. a permanent magnet; 72. an armature; 73. an injection molding; 731. a rotating shaft; 732. a first swing arm; 733. a second swing arm; 74. a first yoke; 75. a second yoke; 8. an alternating current transformer; 91. a first pusher card; 92. a second pusher card; 10. a fixing frame; x, transverse direction; y, longitudinal direction; z, vertical direction; l1, a first center line; l2, a second centerline; s1, a constant magnetic field; s2, a first alternating magnetic field; s3, a second alternating magnetic field.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

As shown in fig. 1 to 3, the magnetic latching relay of the embodiment of the present invention includes a base 1, a contact structure 2, a first stationary spring lead 3, a coil assembly 6, and a magnetic circuit structure 7.

As shown in fig. 1, the contact structure 2 is provided on the base 1, the contact structure 2 has a first end 21 and a second end 22 in the lateral direction X, the first end 21 is provided with a first contact group including a first movable contact 211 and a first stationary contact 212, and the second end 22 is provided with a second contact group including a second movable contact 221 and a second stationary contact 222.

In some embodiments, as shown in fig. 1, the contact structure 2 has a first reed 201 extending along the transverse direction X, the first end 21 of the first reed 201 has two first fixed contacts 212, the second end 22 of the first reed 201 has two second movable contacts 221, the contact structure 2 further has a second reed 202 juxtaposed with the first reed 201, the first end 21 of the second reed 202 has two first movable contacts 211 corresponding to the two first fixed contacts 212, respectively, and the second end 22 of the second reed 202 has two second fixed contacts 222 corresponding to the two second movable contacts 221. When the magnetic latching relay is closed, the first movable contact 211 is closed with the first stationary contact 212, the second movable contact 221 is closed with the second stationary contact 222, and the first reed 201 and the second reed 202 are energized.

In some embodiments, the first end 21 of the first reed 201 can also have a first stationary contact 212, the second end 22 of the first reed 201 has a second stationary contact 222, the first end 21 of the second reed 202 has a first movable contact 211, and the second end 22 of the second reed 202 has a second movable contact 221.

As shown in fig. 4, the first stationary spring drawer 3 includes a first drawer portion 31 and a second drawer portion 32, and the first drawer portion 31 and the second drawer portion 32 are connected. The first lead-out portion 31 is connected to the first end 21 of the contact structure 2, and the second lead-out portion 32 extends from the bottom of the base 1 in the vertical direction Z out of the base 1. As shown in fig. 4, the first lead-out portion 31 has a guide groove 33, the guide groove 33 extending in the lateral direction X from a side of the first lead-out portion 31 near the second end 22 and not penetrating the first lead-out portion 31, the opening of the guide groove 33 being directed toward the second contact group contacting the second end 22 of the structure 2.

In some embodiments, guide slot 33 is located on one side of first stationary contact 212 in vertical direction Z. I.e. the guide groove 33 extends from the side of the first lead-out 31 near the second end 22 of the contact structure 2 at least to the side of the first stationary contact 212 in the vertical direction Z. In this way, the load current flowing from the first contact group into the first stationary spring lead-out member 3 can flow at the portion of the first lead-out portion 31 away from the second contact group, and thus the load current can flow away from the magnetic circuit structure 7 and the coil assembly 6, avoiding the influence of the alternating magnetic field generated when the load current flows vertically at the first stationary spring lead-out member 3 on the constant magnetic field generated by the magnetic circuit structure 7.

In some embodiments, the depth dimension of the guide groove 33 in the lateral direction X is 1/3 to 1/2 of the dimension of the first lead-out portion 31 in the lateral direction X to ensure that the rated current carrying capacity is 200A or less. That is, in the case where the rated current-carrying capacity is ensured to meet the above-described condition, the larger the depth dimension of the guide groove 33, the more distant from the constant magnetic field as possible when the load current flows in the first dead spring lead 3, and the influence of the alternating magnetic field generated by the load current on the constant magnetic field generated by the magnetic circuit structure 7 can be avoided.

In some embodiments, as shown in fig. 4, the first lead-out portion 31 of the first stationary spring lead-out member 3 is connected to the first stationary contact 212, and the second lead-out portion 32 protrudes from the bottom of the base 1 in the vertical direction Z out of the base 1. Specifically, the first lead-out portion 31 may be connected to a side of the first reed 201 facing away from the second reed 202, that is, to an end of the first stationary contact 212 facing away from the first movable contact 211. In an embodiment of the invention, there may be two contact structures 2 and thus two first static spring lead-out members 3.

In some embodiments, as shown in fig. 6, the number of first stationary contacts 212 is two. The first leaf 201 of the contact structure 2 has a slot 203, which slot 203 extends from the second end 22 of the first leaf 201, i.e. the second end 22 of the contact structure 2, in the transverse direction X between two first stationary contacts 212. The guide groove 33 of the first stationary spring guide 3 is located between the two first stationary contacts 212.

Since the first reed 201 has the slit 203, when a load current flows into the first reed 201, the load current is divided into two paths flowing along both sides of the slit 203, and when the current flows through the first drawing portion 31 of the first stationary spring drawing member 3, the current continues to be divided into two paths flowing along both sides of the guide groove 33, and the current located above the guide groove 33 (in the vertical direction Z) is changed to flow in the vertical direction Z after bypassing the guide groove 33. When the load current flows from the second lead-out portion 32 to the first lead-out portion 31, the load current flows in a portion of the first lead-out portion 31 away from the second end 22 of the contact structure 2 when the load current flows in the vertical direction Z on the first lead-out portion 31 due to the lateral guide groove 33 provided on the first lead-out portion 31. Therefore, by providing the slit 203 on the first reed 201 and providing the guide groove 33 on the first stationary spring lead-out member 3, it is possible to make the load current flow in the vertical direction through the first lead-out portion 31, the load current can flow around the guide groove 33 at a portion of the first lead-out portion 31 away from the second contact group (as indicated by the broken line arrow in fig. 6), as shown in fig. 5, so that the first alternating magnetic field S2 formed by the load current flowing in the vertical direction Z on the first stationary spring lead-out member 3 can be away from the magnetic circuit structure 7 and the coil 62, reducing the influence of the first alternating magnetic field S2 on the constant magnetic field S1 formed between the magnetic circuit structure 7 and the coil assembly 6, making the magnetic latching relay more stable.

As shown in fig. 1, 4 and 5, the magnetic latching relay of the embodiment of the present invention further includes a second dead spring lead-out member 4. One end of the second stationary spring lead-out member 4 is connected to the second stationary contact 222 of the second end 22 of the contact structure 2, and the other end extends from the second stationary contact 222 in the lateral direction X in a direction away from the first contact group and protrudes from the side wall of the base 1. As shown in fig. 5, one end of the second stationary spring lead-out member 4 is connected to a side of the second reed 202 facing away from the first reed 201, that is, to an end of the second stationary contact 222 facing away from the second movable contact 221. The second static spring leading-out piece 4 extends along the transverse direction X, and the other end is a free end. In an embodiment of the invention, there may be two contact structures 2 and thus also two second static spring lead-out elements 4.

As shown in fig. 3 and 4, the magnetic latching relay of the embodiment of the present invention further includes a lead-out pin 5. The lead-out pins 5 are located outside the base 1 and extend in the vertical direction Z. One end of the pin 5 is connected to one end (i.e., the free end) of the second stationary spring pin 4 located outside the base 1, and the other end is a free end.

With continued reference to fig. 4, the first and second stationary spring ejectors 3, 4 are respectively connected in a load circuit. Taking the example of having two contact structures 2, when the first contact group and the second contact group are closed, as shown in fig. 4, the current of the external load circuit may flow into one of the first stationary spring lead-out members 3 in the vertical direction Z, then flow through one of the contact structures 2, then flow through one of the second stationary spring lead-out members 4, then flow into the load circuit, and the current of the load circuit may flow into the other of the second stationary spring lead-out members 4 in the vertical direction Z, then flow through the other of the contact structures 2, then flow through the other of the first stationary spring lead-out members 3, and then flow into the load circuit (as shown by the arrow in fig. 4).

Since the current of the load circuit is alternating current, an alternating voltage is generated when the current flows through the magnetic latching relay. For example, the first stationary spring lead 3 extends in the vertical direction Z, and the magnetic induction line of the first alternating magnetic field S2 generated by the load current flowing in the vertical direction on the first lead-out portion 31 and the second lead-out portion 32 is shown as a broken line circle in fig. 5. The lead-out legs 5 extend in the vertical direction Z, and the magnetic induction lines of the second alternating magnetic field S3 generated by the lead-out legs are also shown as dotted circles in fig. 5. In the embodiment of the invention, the distance from the leading-out pin 5 to the second contact group is larger than the distance from the first static spring leading-out piece 3 to the contact group. That is, the first stationary spring lead-out foot 5 is closer to the contact structure 2.

As shown in fig. 2, the coil assembly 6 according to the embodiment of the present invention is disposed on the base 1 and between the two contact structures 2. The magnetic circuit structure 7 is located between the coil assembly 6 and one of the contact structures 2, and as shown in fig. 5, when a pulse voltage is applied to the coil assembly 6, the magnetic circuit structure 7 and the coil assembly 6 can form a constant magnetic field S1, and a first center line L1 of the constant magnetic field S1 in the longitudinal direction Y is offset from a second center line L2 between the first contact group and the second contact group and is closer to the second contact group.

As shown in fig. 5, the first center line L1 is a straight line passing through the middle of the constant magnetic field S1 in the longitudinal direction, and the second center line L2 is a straight line passing through the middle of the first contact group and the second contact group in the longitudinal direction.

As shown in fig. 5, since the magnetic circuit structure 7, the coil assembly 6 and the first lead-out portion 31 of the first static spring lead-out member 3 are all located in the base 1, the magnetic induction line of the constant magnetic field S1 formed by the magnetic circuit structure 7 and the coil assembly 6 is at least partially coplanar with the magnetic induction line of the first alternating magnetic field S2 generated at the first static spring lead-out member 3, if the two magnetic fields partially overlap, when the direction of the magnetic induction line of the first alternating magnetic field S2 is opposite to the direction of the magnetic induction line of the constant magnetic field S1, the constant magnetic field S1 is weakened, which may cause the magnetic latching relay to be disconnected, and if the direction of the magnetic induction line of the first alternating magnetic field S2 is identical to the direction of the magnetic induction line of the constant magnetic field S1, the alternating magnetic field S2 may affect the stability of the constant magnetic field S1, which may affect the stability of the operation of the magnetic latching relay. However, in this embodiment, the first center line L1 of the constant magnetic field S1 deviates from the second center line L2 between the first contact group and the second contact group and is closer to the second contact group, so that the constant magnetic field S1 is far away from the first alternating magnetic field S2 of the first static spring lead-out member 3, overlapping of the two is avoided, and stability of the magnetic latching relay is further improved.

In addition, since the second static spring lead-out piece 4 extends out of the side wall of the base 1, the lead-out pin 5 is located outside the base 1, so that the second alternating magnetic field S3 generated at the lead-out pin 5 is far away from the constant magnetic field S1, and meanwhile, the second alternating magnetic field S3 does not influence the constant magnetic field S1 generated by the magnetic circuit structure 7 because the base 1 has a shielding function.

In some embodiments, as shown in fig. 2, 4 and 5, the coil assembly 6 includes a bobbin 61, a coil 62 and a core 63. The coil former 61 is provided on the base 1, the coil 62 is wound around the coil former 61, and the iron core 63 is located in the coil former 61. Wherein the first center line L1 passes through the center of the bobbin 61.

That is, the first centerline L1 coincides with the centerline of the bobbin 61, and the bobbin 61 is offset from the contact structure 2.

In some embodiments, as shown in fig. 1 and 2, magnetic circuit structure 7 includes a permanent magnet 71, an armature 72, a first yoke 74, and a second yoke 75.

As shown in fig. 2, a permanent magnet 71 is swingably provided on the base 1, an armature 72 is provided on the permanent magnet 71, and the armature 72 protrudes from the permanent magnet 71 in the lateral direction X. The armatures 72 may be provided in two, provided on both sides of the permanent magnet 71 in the longitudinal direction Y, each armature 72 protruding from the permanent magnet 71 in the lateral direction X.

As shown in fig. 1, the magnetic circuit structure 7 further comprises an injection-molded part 73. Injection molding 73 is coated on permanent magnet 71 and a portion of armature 72, such that permanent magnet 71 and armature 72 are fixedly connected, and a portion of armature 72 protruding from permanent magnet 71 is not coated by injection molding 73. I.e., permanent magnet 71 and armature 72 may be secured together using an injection molding process.

As shown in fig. 1, the injection molding member 73 has a rotation shaft 731, and one end of the rotation shaft 731 is connected to the shaft hole of the base 1, so that the injection molding member 73, the armature 72, and the permanent magnet 71 can swing around the rotation shaft 731. The other end of the rotation shaft 731 may be coupled to a shaft hole of the fixing frame 10 (shown in fig. 7). The injection molding part 73 can be pivoted on the base 1 about the pivot axis 731 by the pivot axis 731. The fixing frame 10 is used for limiting the permanent magnet 71, the armature 72 and the injection molding piece 73 so that the permanent magnet, the armature 72 and the injection molding piece cannot be separated from the base 1.

As shown in fig. 2, the first yoke 74 and the second yoke 75 are fixed to the base 1 and located at opposite sides of the coil assembly 6. Wherein the first yoke 74 is located at one side of the coil assembly 6 in the transverse direction X, one end of the first yoke 74 is connected to one end of the iron core 63, and the other end of the first yoke 74 can be connected in contact with one end of the armature 72 (i.e., the other end of the first yoke 74 overlaps with one end of the armature 72 when the permanent magnet 71 swings to one side, and the other end of the first yoke 74 is separated from one end of the armature 72 when the permanent magnet 71 swings to the other side). The second yoke 75 is located at the other side of the coil assembly 6 in the lateral direction X, one end of the second yoke 75 is connected to the other end of the iron core 63, and the other end of the second yoke 75 can be connected in contact with the other end of the armature 72 (i.e., the other end of the second yoke 75 overlaps the other end of the armature 72 when the permanent magnet 71 swings to the other side, and the other end of the second yoke 75 is separated from the other end of the armature 72 when the permanent magnet 71 swings to one side). When a pulse voltage is applied to the coil 62, the permanent magnet 71 swings to one side about the rotation shaft 731, and a constant magnetic field S1 is generated at the permanent magnet 71, the armature 72, the first yoke 74, the iron core 63, and the second yoke 75. The first center line L1 of the constant magnetic field S1 passes through the center of the permanent magnet 71, i.e., through the center of the rotation shaft 731 (the center of the rotation shaft 731 and the center of the permanent magnet 71 may be located on a straight line), and the rotation shaft 731 is located at an intermediate position of the magnetic circuit structure 7, so that the magnetic circuit structure 7 is biased to be closer to the second contact group than the contact structure 2.

In some embodiments, the distance between the first centerline L1 and the second centerline L2 is 6-9 mm. For example, the distance between the first center line L1 and the second center line L2 may be 7mm, 7.5mm, 8mm, 8.5mm in addition to the above-described two end values, and by setting the distance between the first center line L1 and the second center line L2 to the above-described value, the constant magnetic field S1 can be made to avoid the influence of the first alternating magnetic field S2 generated by the first dead spring lead 3. Those skilled in the art can set the configuration according to the actual situation, and are not particularly limited herein.

In some embodiments, as shown in fig. 7, the magnetic latching relay further includes an ac transformer 8, and the portion of the second static spring lead 4 extending from the base 1 is disposed through the ac transformer 8 such that the ac transformer 8 is located between the lead pin 5 and the second contact set. Because the alternating current transformer 8 is arranged between the leading-out pin 5 and the second contact set, the alternating current transformer 8 can block the second alternating magnetic field S3 generated by the leading-out pin 5, has a shielding effect on the second alternating magnetic field S3, and avoids the influence on the constant magnetic field S1 formed by the magnetic circuit structure 7 and the coil assembly 6.

In some embodiments, as shown in fig. 1, the base 1 has a first side wall 11 and a second side wall 12 opposite in the transverse direction X, the first side wall 11 being adjacent to a first end 21 of the contact structure 2 and the second side wall 12 being adjacent to a second end 22 of the contact structure 2. Wherein the portion of the first sidewall 11 not corresponding to the contact structure 2 in the lateral direction X is recessed inward and the portion of the second sidewall 12 not corresponding to the contact structure 2 in the lateral direction X is protruding outward.

That is, due to the bias of the magnetic circuit structure 7 and the coil assembly 6, the side walls of the base 1 corresponding to the magnetic circuit structure 7 and the coil assembly 6 are also displaced, so that the volume of the magnetic latching relay can be reduced as much as possible, and the material can be saved.

It should be noted that "inner" and "outer" in the embodiments of the present invention are understood as the inside and the outside of the base 1, for example, the contact structure 2, the coil assembly 6, the magnetic circuit structure 7, etc. are all located in the base 1, and the lead pin 5 is located outside the base 1.

In some embodiments, as shown in fig. 1, the magnetic latching relay further includes a first pusher card 91 and a second pusher card 92. The first pusher card 91 is located in the base 1 and close to the first side wall 11, and one end of the first pusher card 91 is connected to the first movable contact 211 in the first contact group of the contact structure 2. The second push card 92 is located in the base 1 and is close to the second side wall 12, one end of the second push card 92 is connected with the second movable contact 221 in the second contact set of the contact structure 2 (for example, a compression spring may be disposed at the second end 22 of the first reed 201, one end of the second push card 92 is connected with the second movable contact 221 through the compression spring), and a portion of the second push card 92 that does not correspond to the push structure protrudes in a direction close to the second side wall 12.

With continued reference to fig. 1, the injection molding member 73 of the magnetic circuit structure 7 further includes a first swing arm 732 and a second swing arm 733, the first swing arm 732 is connected to the first push card 91, and the second swing arm 733 is connected to the second push card 92.

When a forward pulse voltage is applied to coil 62, permanent magnet 71 swings to one side, and simultaneously, armature 72 is driven to swing, so that one of armatures 72 overlaps first yoke 74 and the other overlaps second yoke 75. The permanent magnet 71, the armature 72, the first yoke 74, the core 63, and the second yoke 75 form a constant magnetic field S1. Meanwhile, the permanent magnet 71 drives the first swing arm 732 and the second swing arm 733 to swing, the first swing arm 732 drives the first push card 91 to move in the longitudinal direction Y, and the first swing arm 732 drives the first movable contact 211 to move in a direction approaching the first stationary contact 212, so that the first movable contact 211 and the first stationary contact 212 are closed. The second swing arm 733 drives the second push card 92 to move in the longitudinal direction Y, so that the second swing arm 733 drives the second movable contact 221 to move in a direction approaching the second stationary contact 222, so that the second movable contact 221 and the second stationary contact 222 are closed, and the contact structure 2, that is, the relay is closed, and the external load circuit is conducted. When the coil 62 is de-energized, the permanent magnet 71 can maintain the constant magnetic field S1, which in turn maintains the position of the first swing arm 732 and the second swing arm 733, keeping the relay closed.

When the coil 62 is energized with a reverse pulse voltage, the permanent magnet 71 swings to the other side, and simultaneously drives the armatures 72 to swing to the other side, wherein one of the armatures 72 is overlapped with the second yoke 75, and the other is overlapped with the first yoke 74, forming another reverse constant magnetic field S1. Meanwhile, the permanent magnet 71 drives the first swing arm 732 and the second swing arm 733 to swing in opposite directions, so that the first movable contact 211 and the first stationary contact 212 are disconnected, the second movable contact 221 and the second stationary contact 222 are disconnected, that is, the relay is disconnected, and the external load circuit is disconnected. When the coil 62 is deenergized, the permanent magnet 71 can maintain the constant magnetic field S1, thereby maintaining the positions of the first swing arm 732 and the second swing arm 733, and maintaining the relay off.

In the embodiment of the present invention, compared with the second center line L2 of the contact structure 2, the magnetic circuit structure 7 and the coil assembly 6 are offset, the portion of the second push card 92 that does not correspond to the contact structure 2 protrudes in a direction approaching the second side wall 12, the first push card 91 and the second push card 92 are not symmetrical structures, and since the first swing arm 732 is connected to the first push card 91 and the second swing arm 733 is connected to the second push card 92, the arm lengths of the first swing arm 732 and the second swing arm 733 may be different, and the swing radii of the first swing arm 732 and the second swing arm 733 may be different.

In summary, when the load alternating current is turned on, the first alternating magnetic field S2 generated by the first static spring lead-out member 3 may affect the constant magnetic field S1 generated by the magnetic circuit structure 7, and in the embodiment of the invention, the first center line L1 of the constant magnetic field S1 in the longitudinal direction Y is set to deviate from the second center line L2 between the first contact set and the second contact set and to be closer to the second contact set, so that the magnetic circuit structure 7 is biased to be further away from the first static spring lead-out member 3 than the contact structure 2, thereby avoiding the influence of the first alternating magnetic field S2 generated by the first static spring lead-out member 3 on the magnetic field generated by the magnetic circuit structure 7, and improving the stability of the magnetic latching relay.

It will be appreciated that the various embodiments/implementations provided by the invention may be combined with one another without conflict and are not illustrated here.

In embodiments of the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the embodiments of the present invention will be understood by those of ordinary skill in the art according to specific circumstances.

In the description of the embodiments of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and to simplify the description, rather than to indicate or imply that the devices or units referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention and is not intended to limit the embodiment of the present invention, and various modifications and variations can be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A magnetic latching relay, comprising:

a base;

the contact structure is arranged on the base and is provided with a first end and a second end in the transverse direction, the first end is provided with a first contact set, and the second end is provided with a second contact set;

one end of the first static spring leading-out piece is connected with the first end, and the other end of the first static spring leading-out piece extends out of the base along the vertical direction from the bottom of the base; and

the coil component and the magnetic circuit structure are arranged on the base and are positioned at one side of the contact structure in the longitudinal direction;

when pulse voltage is applied to the coil assembly, the magnetic circuit structure and the coil assembly can form a constant magnetic field, and a first central line of the constant magnetic field in the longitudinal direction deviates from a second central line between the first contact set and the second contact set and is closer to the second contact set, so that the constant magnetic field is far away from the first static spring leading-out piece.

2. The magnetic latching relay of claim 1, wherein the coil assembly comprises:

the coil rack is arranged on the base;

a coil wound around the bobbin;

an iron core located in the bobbin;

wherein the first centerline passes through a center of the bobbin.

3. The magnetic latching relay according to claim 2, wherein the magnetic circuit structure comprises:

a permanent magnet swingably provided on the base;

the armature is arranged on the permanent magnet and protrudes out of the permanent magnet in the transverse direction;

the first yoke and the second yoke are fixed on the base and are positioned on two opposite sides of the coil assembly, one end of the first yoke is connected with one end of the iron core, and the other end of the first yoke can be in contact connection with one end of the armature; one end of the second yoke is connected with the other end of the iron core, and the other end of the second yoke can be in contact connection with the other end of the armature;

when a pulse voltage is applied to the coil, the permanent magnet swings to one side, the constant magnetic field is generated at the permanent magnet, the armature, the first yoke, the iron core and the second yoke, and the first center line of the constant magnetic field passes through the center of the permanent magnet.

4. The magnetic latching relay according to claim 1, wherein the first stationary spring lead-out member includes a first lead-out portion connected to the first end of the contact structure and a second lead-out portion connected to the first lead-out portion and extending from the bottom of the base in the vertical direction; the first lead-out portion has a guide groove extending from a side of the first lead-out portion near the second end in the lateral direction without penetrating the first lead-out portion, and an opening of the guide groove faces the second contact group.

5. The magnetic latching relay according to claim 4, wherein a depth dimension of the guide groove in the lateral direction is 1/3 to 1/2 of a dimension of the first lead-out portion in the lateral direction.

6. The magnetic latching relay of claim 4, wherein said first contact set comprises a first stationary contact and a first movable contact, and said second contact set comprises a second stationary contact and a second movable contact;

the contact structure has a first reed extending in the transverse direction, the first end of the first reed having two of the first stationary contacts, the second end of the first reed having two of the second movable contacts, the first reed having a slot extending in the transverse direction from the second end of the first reed to between the two of the first stationary contacts;

the guide groove of the first stationary spring guide is located between the two first stationary contacts.

7. The magnetic latching relay according to claim 6, wherein said contact structure further has a second spring juxtaposed with said first spring, said first end of said second spring having two of said first movable contacts corresponding to two of said first stationary contacts, respectively, and said second end of said second spring having two of said second stationary contacts corresponding to two of said second movable contacts, respectively.

8. The magnetic latching relay according to claim 1, wherein the distance between the first center line and the second center line is 6-9 mm.

9. The magnetic latching relay of claim 1, further comprising:

and one end of the second static spring leading-out piece is connected with the second end, and the other end of the second static spring leading-out piece extends from the second end along the transverse direction to a direction far away from the first contact group and extends out from the side wall of the base.

10. The magnetic latching relay of claim 9, further comprising:

the leading-out pin is positioned outside the base, extends along the vertical direction, and one end of the leading-out pin is connected with one end of the second static spring leading-out piece positioned outside the base; the distance from the leading-out pin to the second contact set is larger than the distance from the first static spring leading-out piece to the first contact set.

11. The magnetic latching relay of claim 10, further comprising:

and the part of the second static spring leading-out piece, which extends out of the base, penetrates through the alternating current transformer, so that the alternating current transformer is positioned between the leading-out pin and the second contact group.

12. The magnetic latching relay according to any one of claims 1 to 11, wherein the base has first and second laterally opposed side walls, the first side wall being proximate the first end of the contact structure and the second side wall being proximate the second end of the contact structure;

wherein a portion of the first sidewall that does not correspond to the contact structure in the lateral direction is recessed inward, and a portion of the second sidewall that does not correspond to the contact structure in the lateral direction is protruding outward.

13. The magnetic latching relay of claim 12, further comprising:

the first pushing card is positioned in the base and is close to the first side wall, and one end of the first pushing card is connected with a first movable contact in the first contact group of the contact structure;

the second pushing card is positioned in the base and is close to the second side wall, one end of the second pushing card is connected with a second movable contact in the second contact group of the contact structure, and a part of the second pushing card, which does not correspond to the pushing structure, protrudes towards the direction close to the second side wall.