Magnetic latching relay

Abstract

The embodiment of the present application provides a magnetic latching relay, comprising 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, the contact structure has a first end and a second end in the transverse direction, the first end is provided with a first contact group, and the second end is provided with a second contact group; 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 assembly and the magnetic circuit structure are arranged on the base and located on one side of the contact structure in the longitudinal direction; when a pulse voltage is applied to the coil assembly, the magnetic circuit structure and the coil assembly can form a constant magnetic field, the first center line of the constant magnetic field in the longitudinal direction deviates from the second center line between the first contact group and the second contact group, and is closer to the second contact group, 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

Technical Field

[0001] This invention relates to the field of relay technology, and more particularly to a magnetic latching relay. Background Technology

[0002] A magnetic latching relay is an electronic switch that connects and disconnects a load circuit. When a pulse voltage is applied to the coil of the magnetic latching relay, the magnetic circuit structure generates a constant magnetic field. This constant magnetic field keeps the magnetic latching relay in a closed or open state. The magnetic latching relay includes leads for electrical connection to an external load. These leads typically extend perpendicular to the base. When the load current is switched on (alternating current), the leads generate an alternating magnetic field. This alternating magnetic field is at least partially coplanar with the constant magnetic field generated by the magnetic circuit structure.

[0003] Some leads are close to the magnetic circuit structure. When the magnetic field lines of the alternating magnetic field are in the opposite direction to those of the constant magnetic field, the constant magnetic field will be weakened. When they are in the same direction, the stability of the constant magnetic field will be disturbed. Especially under high current conditions, this may cause the magnetic latching relay to disconnect, resulting in instability of the magnetic latching relay during use.

[0004] The information disclosed in the background section is only for enhancing the understanding of the background of the present invention, and therefore may include information that does not constitute related technology known to those skilled in the art. Summary of the Invention

[0005] Embodiments of the present invention provide a magnetic latching relay that can avoid the influence of alternating magnetic fields and improve the stability of the magnetic latching relay.

[0006] This invention provides a magnetic latching relay, including a base, a contact structure, a first stationary spring lead-out, a coil assembly, and a magnetic circuit structure. The contact structure is disposed on the base and has a first end and a second end in the transverse direction. The first end has a first contact group, and the second end has a second contact group. One end of the first stationary spring lead-out is connected to the first end, and the other end extends vertically from the bottom of the base. The coil assembly and the magnetic circuit structure are disposed on the base and located on one side of the contact structure in the longitudinal direction. When a pulse voltage is applied to the coil assembly, the magnetic circuit structure and the coil assembly can form a constant magnetic field. The first center line of the constant magnetic field in the longitudinal direction deviates from the second center line between the first contact group and the second contact group, and is closer to the second contact group, thus moving the constant magnetic field away from the first stationary spring lead-out.

[0007] In some embodiments of the present invention, the coil assembly includes: a coil frame disposed on the base; a coil wound on the coil frame; and an iron core located in the coil frame; wherein the first center line passes through the center of the coil frame.

[0008] In some embodiments of the present invention, the magnetic circuit structure includes: a permanent magnet oscillatingly disposed on the base; an armature disposed on the permanent magnet, the armature protruding from the permanent magnet in the lateral direction; a first yoke and a second yoke fixed on the base and located on opposite sides of the coil assembly, one end of the first yoke being connected to one end of the iron core, and the other end of the first yoke being able to contact one end of the armature; one end of the second yoke being connected to the other end of the iron core, and the other end of the second yoke being able to contact the other end of the armature; wherein, when a pulse voltage is applied to the coil, the permanent magnet oscillates to one side, generating the constant magnetic field at the permanent magnet, the armature, the first yoke, the iron core, and the second yoke, the first center line of the constant magnetic field passing through the center of the permanent magnet.

[0009] In some embodiments of the present invention, the first static spring lead-out member includes a first lead-out portion and a second lead-out portion. The first lead-out portion is connected to the first end of the contact structure, and the second lead-out portion is connected to the first lead-out portion and extends from the bottom of the base along the vertical direction of the base. The first lead-out portion has a guide groove that extends laterally from the side of the first lead-out portion near the second end and does not penetrate the first lead-out portion. The opening of the guide groove faces the second contact group.

[0010] In some embodiments of the present invention, the depth dimension of the guide groove along the transverse direction is 1 / 3 to 1 / 2 of the dimension of the first lead-out portion along the transverse direction.

[0011] In some embodiments of the present invention, the first contact group includes a first stationary contact and a first movable contact, and the second contact group includes a second stationary contact and a second movable contact; the contact structure has a first spring extending laterally, the first end of the first spring having two first stationary contacts, the second end of the first spring having two second movable contacts, the first spring having a slot extending laterally from the second end of the first spring to between the two first stationary contacts; the guide groove of the first stationary spring lead-out member is located between the two first stationary contacts.

[0012] In some embodiments of the present invention, the contact structure further includes a second spring plate parallel to the first spring plate, the first end of the second spring plate having two first moving contacts corresponding to two first stationary contacts respectively, and the second end of the second spring plate having two second stationary contacts corresponding to two second moving contacts respectively.

[0013] In some embodiments of the present invention, the distance between the first center line and the second center line is 6 to 9 mm.

[0014] In some embodiments of the present invention, the magnetic latching relay further includes: a second stationary spring lead-out member, one end of which is connected to the second end, and the other end of which extends from the second end in a transverse direction away from the first contact group and extends out from the side wall of the base.

[0015] In some embodiments of the present invention, the magnetic latching relay further includes: a lead-out foot located outside the base, the lead-out foot extending along the vertical direction, and one end of the lead-out foot being connected to the end of the second stationary spring lead-out located outside the base; wherein the distance from the lead-out foot to the second contact group is greater than the distance from the first stationary spring lead-out to the first contact group.

[0016] In some embodiments of the present invention, the magnetic latching relay further includes an AC transformer, wherein the portion of the second static spring lead extending out of the base passes through the AC transformer, such that the AC transformer is located between the lead and the second contact group.

[0017] In some embodiments of the present invention, the base has a first sidewall and a second sidewall opposite each other in the lateral direction, the first sidewall being close to the first end of the contact structure and the second sidewall being close to the second end of the contact structure; wherein, the portion of the first sidewall that does not correspond to the contact structure in the lateral direction is recessed inward and the portion of the second sidewall that does not correspond to the contact structure in the lateral direction is protruding outward.

[0018] In some embodiments of the present invention, the magnetic latching relay further includes: a first push card located in the base and close to the first sidewall, one end of the first push card being connected to a first moving contact in the first contact group of the contact structure; and a second push card located in the base and close to the second sidewall, one end of the second push card being connected to a second moving contact in the second contact group of the contact structure, wherein a portion of the second push card not corresponding to the push structure protrudes toward the direction close to the second sidewall.

[0019] As can be seen from the above technical solution, the present invention possesses at least one of the following advantages and positive effects:

[0020] In this embodiment of the invention, when the alternating current of the load is connected, the alternating magnetic field generated by the first stationary spring lead may affect the constant magnetic field generated by the magnetic circuit structure. In this embodiment of the invention, by setting the first center line of the constant magnetic field in the longitudinal direction to be offset from the second center line between the first contact group and the second contact group, and closer to the second contact group, the magnetic circuit structure is offset from the contact structure and away from the first stationary spring lead, so as to avoid the influence of the alternating magnetic field generated by the first stationary spring lead on the magnetic field generated by the magnetic circuit structure and improve the stability of the magnetic latching relay. Attached Figure Description

[0021] The above and other features and advantages of the present invention will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0022] Figure 1 This is a top view schematic diagram illustrating a magnetic latching relay according to some embodiments of the present invention;

[0023] Figure 2 This is a top view schematic diagram of a magnetic latching relay (with the injection molded part removed) illustrating some embodiments of the present invention;

[0024] Figure 3 This is a three-dimensional structural schematic diagram of a magnetic latching relay shown in some embodiments of the present invention;

[0025] Figure 4 This is a three-dimensional structural diagram of a magnetic latching relay (without the base and push card) shown in some embodiments of the present invention;

[0026] Figure 5 This is a top view schematic diagram of a magnetic latching relay (without base) shown in some embodiments of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the first stationary spring lead-out member and the first spring leaf shown in some embodiments of the present invention;

[0028] Figure 7 This is a three-dimensional structural diagram of a magnetic latching relay (without the base and push card, and with an AC transformer added) shown in some embodiments of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Base; 11. First sidewall; 12. Second sidewall; 2. Contact structure; 21. First end; 211. First moving contact; 212. First stationary contact; 22. Second end; 221. Second moving contact; 222. Second stationary contact; 201. First spring; 202. Second spring; 203. Slot; 3. First stationary spring lead-out; 31. First lead-out portion; 32. Second lead-out portion; 33. Guide groove; 4. Second stationary spring lead-out; 5. Lead-out foot; 6. Coil assembly; 61. Coil frame; 62. 7. Coil; 63. Iron core; 7. Magnetic circuit structure; 71. Permanent magnet; 72. Armature; 73. Injection molded part; 731. Rotating shaft; 732. First swing arm; 733. Second swing arm; 74. First yoke; 75. Second yoke; 8. AC transformer; 91. First push card; 92. Second push card; 10. Fixing frame; X. Lateral; Y. Longitudinal; Z. Vertical; L1. First center line; L2. Second center line; S1. Constant magnetic field; S2. First alternating magnetic field; S3. Second alternating magnetic field. Detailed Implementation

[0031] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0032] like Figures 1 to 3 As shown, the magnetic latching relay of this embodiment of the invention includes a base 1, a contact structure 2, a first stationary spring lead-out 3, a coil assembly 6, and a magnetic circuit structure 7.

[0033] like Figure 1 As shown, the contact structure 2 is disposed on the base 1. The contact structure 2 has a first end 21 and a second end 22 in the transverse X direction. The first end 21 is provided with a first contact group including a first moving contact 211 and a first stationary contact 212. The second end 22 is provided with a second contact group including a second moving contact 221 and a second stationary contact 222.

[0034] In some embodiments, such as Figure 1As shown, the contact structure 2 has a first spring 201 extending laterally X. The first end 21 of the first spring 201 has two first stationary contacts 212, and the second end 22 of the first spring 201 has two second moving contacts 221. The contact structure 2 also has a second spring 202 parallel to the first spring 201. The first end 21 of the second spring 202 has two first moving contacts 211, corresponding to the two first stationary contacts 212 respectively, and the second end 22 of the second spring 202 has two second stationary contacts 222, corresponding to the two second moving contacts 221. When the magnetic latching relay is closed, the first moving contacts 211 and the first stationary contacts 212 are closed, and the second moving contacts 221 and the second stationary contacts 222 are closed, energizing both the first spring 201 and the second spring 202.

[0035] In some embodiments, the first end 21 of the first reed 201 may also have a first stationary contact 212, and the second end 22 of the first reed 201 may have a second stationary contact 222. Then the first end 21 of the second reed 202 may have a first moving contact 211, and the second end 22 of the second reed 202 may have a second moving contact 221.

[0036] like Figure 4 As shown, the first stationary spring lead-out member 3 includes a first lead-out portion 31 and a second lead-out portion 32, which 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 out of the base 1 from the bottom of the base 1 in the vertical direction Z. Figure 4 As shown, the first lead-out portion 31 has a guide groove 33, which extends laterally along the X direction from the side of the first lead-out portion 31 near the second end 22 and does not penetrate the first lead-out portion 31. The opening of the guide groove 33 faces the second contact group of the second end 22 of the contact structure 2.

[0037] In some embodiments, the guide groove 33 is located on one side of the first stationary contact 212 in the vertical direction Z. That is, the guide groove 33 extends at least from the side of the first lead-out portion 31 near the second end 22 of the contact structure 2 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 in the portion of the first lead-out portion 31 away from the second contact group, so that 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.

[0038] In some embodiments, the depth dimension of the guide groove 33 along the transverse X is 1 / 3 to 1 / 2 of the dimension of the first lead-out portion 31 along the transverse X, to ensure that the rated current carrying capacity is less than or equal to 200A. That is, while ensuring that the rated current carrying capacity meets the above conditions, the greater the depth dimension of the guide groove 33, the better. This allows the load current to flow as far away from the constant magnetic field as possible in the first static spring lead-out portion 3, avoiding the influence of the alternating magnetic field generated by the load current on the constant magnetic field generated by the magnetic circuit structure 7.

[0039] In some embodiments, such as Figure 4 As shown, 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 extends out of the base 1 from the bottom of the base 1 in the vertical direction Z. Specifically, the first lead-out portion 31 can be connected to the side of the first spring 201 opposite to the second spring 202, that is, to the end of the first stationary contact 212 away from the first moving contact 211. In this embodiment of the invention, there can be two contact structures 2, and therefore two first stationary spring lead-out members 3.

[0040] In some embodiments, such as Figure 6 As shown, there are two first stationary contacts 212. The first spring 201 of the contact structure 2 has a slot 203, which extends laterally X from the second end 22 of the first spring 201 (i.e., the second end 22 of the contact structure 2) to the space between the two first stationary contacts 212. The guide groove 33 of the first stationary spring lead-out member 3 is located between the two first stationary contacts 212.

[0041] Because the first spring 201 has a slot 203, when the load current flows into the first spring 201, the load current is divided into two paths flowing along both sides of the slot 203. When the current flows through the first lead-out portion 31 of the first stationary spring lead-out member 3, it continues to be divided into two paths flowing along both sides of the guide groove 33. The current located above the guide groove 33 (vertically in the Z direction) changes to flow in the vertical Z direction after passing around the guide groove 33. When the load current flows from the second lead-out portion 32 to the first lead-out portion 31, because the first lead-out portion 31 is provided with a transverse guide groove 33, when the load current flows in the vertical Z direction on the first lead-out portion 31, the portion of the load current away from the second end 22 of the contact structure 2 flows in the first lead-out portion 31. Therefore, by providing a slot 203 on the first reed 201 and a guide groove 33 on the first stationary spring lead-out member 3, when the load current flows vertically through the first lead-out portion 31, the load current can bypass the guide groove 33 and flow in the portion of the first lead-out portion 31 away from the second contact group (e.g., Figure 6 (As shown by the dashed arrow in the middle), as Figure 5As shown, the first alternating magnetic field S2 formed by the load current flowing in the vertical direction Z on the first static spring lead-out member 3 can be kept 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.

[0042] like Figure 1 , Figure 4 and Figure 5 As shown, the magnetic latching relay of this embodiment further includes a second stationary 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 a transverse X direction away from the first contact group, and protrudes from the side wall of the base 1. Figure 5 As shown, one end of the second stationary spring lead-out 4 is connected to the side of the second spring 202 opposite to the first spring 201, that is, to the end of the second stationary contact 222 away from the second moving contact 221. The second stationary spring lead-out 4 extends laterally X, and the other end is a free end. In this embodiment of the invention, there may be two contact structures 2, and therefore two second stationary spring leads-out 4.

[0043] like Figure 3 and Figure 4 As shown, the magnetic latching relay of this embodiment of the invention also includes a lead-out pin 5. The lead-out pin 5 is located outside the base 1 and extends along the vertical direction Z. One end of the lead-out pin 5 is connected to the end of the second stationary spring lead-out member 4 located outside the base 1 (i.e., the free end mentioned above), and the other end is a free end.

[0044] Continue to refer to Figure 4 The first stationary spring lead-out 3 and the second stationary spring lead-out 4 are respectively connected to the load circuit. Taking a circuit with two contact structures 2 as an example, when the first contact group and the second contact group are closed, as... Figure 4 As shown, the current in the external load circuit can flow vertically in the Z direction into one of the first stationary spring leads 3, then through one of the contact structures 2, then through one of the second stationary spring leads 4, and then into the load circuit. The current in the load circuit can also flow vertically in the Z direction into another second stationary spring lead 4, then through another contact structure 2, then through another first stationary spring lead 3, and finally into the load circuit (e.g., Figure 4 (As indicated by the arrow in the image).

[0045] Since the current in the load circuit is alternating current, an alternating voltage is generated when the current flows through the magnetic latching relay. For example, if the first stationary spring lead 3 extends in the vertical direction Z, the magnetic field lines of the first alternating magnetic field S2 generated by the load current flowing in the vertical direction on the first lead 31 and the second lead 32 are as follows: Figure 5As shown by the dashed circle in the diagram. Lead-out foot 5 extends vertically along the Z direction, and the magnetic field lines of the second alternating magnetic field S3 it generates are also as shown... Figure 5 As shown by the dashed circle in the diagram. In this embodiment of the invention, the distance from the lead-out foot 5 to the second contact group is greater than the distance from the first stationary spring lead-out member 3 to the contact group. That is, the first stationary spring lead-out foot 5 is closer to the contact structure 2.

[0046] like Figure 2 As shown, in this embodiment of the invention, the coil assembly 6 is disposed on the base 1 and located between two contact structures 2. The magnetic circuit structure 7 is located between the coil assembly 6 and one of the contact structures 2, as shown... Figure 5 As shown, 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. The first center line L1 of the constant magnetic field S1 in the longitudinal Y direction is deviated from the second center line L2 between the first contact group and the second contact group, and is closer to the second contact group.

[0047] like Figure 5 As shown, 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.

[0048] like Figure 5 As shown, since the magnetic circuit structure 7, coil assembly 6, and the first lead-out portion 31 of the first stationary spring lead-out member 3 are all located in the base 1, the magnetic field lines of the constant magnetic field S1 formed by the magnetic circuit structure 7 and coil assembly 6 are at least partially coplanar with the magnetic field lines of the first alternating magnetic field S2 generated at the first stationary spring lead-out member 3. If the two magnetic fields partially overlap, when the direction of the magnetic field lines of the first alternating magnetic field S2 is opposite to the direction of the magnetic field lines of the constant magnetic field S1, it will weaken the constant magnetic field S1, which may cause the magnetic latching relay to disconnect. If the direction of the magnetic field lines of the first alternating magnetic field S2 is the same as the direction of the magnetic field lines of the constant magnetic field S1, the alternating magnetic field S2 may affect the stability of the constant magnetic field S1, thus affecting the stability of the magnetic latching relay. However, in this embodiment, the first center line L1 of the constant magnetic field S1 is deviated 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 stationary spring lead-out member 3, avoiding their overlap and further improving the stability of the magnetic latching relay.

[0049] In addition, since the second static spring lead-out 4 extends out of the side wall of the base 1, the lead-out foot 5 is located outside the base 1. Therefore, the second alternating magnetic field S3 generated at the lead-out foot 5 is far away from the constant magnetic field S1. At the same time, since the base 1 has a shielding effect, the second alternating magnetic field S3 will not affect the constant magnetic field S1 generated by the magnetic circuit structure 7.

[0050] In some embodiments, such as Figure 2 , Figure 4 and Figure 5 As shown, the coil assembly 6 includes a coil frame 61, a coil 62, and an iron core 63. The coil frame 61 is mounted on the base 1, the coil 62 is wound around the coil frame 61, and the iron core 63 is located within the coil frame 61. A first center line L1 passes through the center of the coil frame 61.

[0051] In other words, the first center line L1 coincides with the center line of the coil frame 61, and the coil frame 61 is offset relative to the contact structure 2.

[0052] In some embodiments, such as Figure 1 and Figure 2 As shown, the magnetic circuit structure 7 includes a permanent magnet 71, an armature 72, a first yoke 74, and a second yoke 75.

[0053] like Figure 2 As shown, a permanent magnet 71 is pivotally mounted on a base 1, and an armature 72 is mounted on the permanent magnet 71, with the armature 72 protruding from the permanent magnet 71 in the transverse X direction. Two armatures 72 may be provided, located on both sides of the permanent magnet 71 in the longitudinal Y direction, with each armature 72 protruding from the permanent magnet 71 in the transverse X direction.

[0054] like Figure 1 As shown, the magnetic circuit structure 7 also includes an injection-molded part 73. The injection-molded part 73 covers the permanent magnet 71 and part of the armature 72, fixing the permanent magnet 71 and the armature 72 together, and the portion of the armature 72 protruding from the permanent magnet 71 is not covered by the injection-molded part 73. That is, the permanent magnet 71 and the armature 72 can be fixed together using an injection molding process.

[0055] like Figure 1 As shown, the injection molded part 73 has a rotating shaft 731. One end of the rotating shaft 731 is connected to the shaft hole of the base 1, allowing the injection molded part 73, the armature 72, and the permanent magnet 71 to swing around the rotating shaft 731. The other end of the rotating shaft 731 can be connected to the fixing frame 10 (e.g., Figure 7 The shaft hole (shown) allows the injection molded part 73 to swing around the shaft 731 on the base 1. The fixing bracket 10 is used to limit the permanent magnet 71, armature 72 and injection molded part 73 so that they cannot detach from the base 1.

[0056] like Figure 2As shown, the first yoke 74 and the second yoke 75 are fixed to the base 1 and located on opposite sides of the coil assembly 6. The first yoke 74 is located on one side of the coil assembly 6 in the transverse x direction. 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 contact one end of the armature 72 (i.e., when the permanent magnet 71 swings to one side, the other end of the first yoke 74 overlaps with one end of the armature 72; when the permanent magnet 71 swings to the other side, the other end of the first yoke 74 separates from one end of the armature 72). The second yoke 75 is located on the other side of the coil assembly 6 in the transverse x direction. 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 contact the other end of the armature 72 (i.e., when the permanent magnet 71 swings to the other side, the other end of the second yoke 75 overlaps with the other end of the armature 72; when the permanent magnet 71 swings to one side, the other end of the second yoke 75 separates from the other end of the armature 72). When a pulse voltage is applied to coil 62, permanent magnet 71 oscillates to one side around shaft 731, generating a constant magnetic field S1 at permanent magnet 71, armature 72, first yoke 74, core 63, and second yoke 75. The first center line L1 of this constant magnetic field S1 passes through the center of permanent magnet 71, that is, through the center of shaft 731 (the center of shaft 731 and the center of permanent magnet 71 can be on the same straight line). Shaft 731 is located in the middle of magnetic circuit structure 7. Therefore, magnetic circuit structure 7 is offset from contact structure 2 and closer to the second contact group.

[0057] In some embodiments, the distance between the first center line L1 and the second center line L2 is 6–9 mm. For example, in addition to the two values ​​mentioned above, the distance between the first center line L1 and the second center line L2 can also be 7 mm, 7.5 mm, 8 mm, or 8.5 mm. By setting the distance between the first center line L1 and the second center line L2 to the above values, the constant magnetic field S1 can avoid the influence of the first alternating magnetic field S2 generated by the first static spring lead-out member 3. Those skilled in the art can set the distance according to the actual situation, and no special limitation is made here.

[0058] In some embodiments, such as Figure 7 As shown, the magnetic latching relay also includes an AC transformer 8. The portion of the second stationary spring lead-out 4 extending from the base 1 passes through the AC transformer 8, positioning the AC transformer 8 between the lead-out pin 5 and the second contact group. Because the AC transformer 8 is located between the lead-out pin 5 and the second contact group, it can block the second alternating magnetic field S3 generated by the lead-out pin 5, thus shielding the second alternating magnetic field S3 and preventing its influence on the constant magnetic field S1 formed by the magnetic circuit structure 7 and the coil assembly 6.

[0059] In some embodiments, such as Figure 1As shown, the base 1 has a first sidewall 11 and a second sidewall 12 opposite each other in the transverse direction X. The first sidewall 11 is close to the first end 21 of the contact structure 2, and the second sidewall 12 is close to the second end 22 of the contact structure 2. The portion of the first sidewall 11 that does not correspond to the contact structure 2 in the transverse direction X is recessed inward, and the portion of the second sidewall 12 that does not correspond to the contact structure 2 in the transverse direction X is protruding outward.

[0060] In other words, due to the bias of the magnetic circuit structure 7 and the coil assembly 6, the side wall of the base 1 corresponding to the magnetic circuit structure 7 and the coil assembly 6 is also displaced, which can minimize the size of the magnetic latching relay and save materials.

[0061] It should be noted that "inner" and "outer" in the embodiments of the present invention can be understood as the inside and outside of the base 1. For example, the contact structure 2, the coil assembly 6 and the magnetic circuit structure 7 are all located inside the base 1, while the lead-out foot 5 is located outside the base 1.

[0062] In some embodiments, such as Figure 1 As shown, the magnetic latching relay also includes a first push card 91 and a second push card 92. The first push card 91 is located in the base 1 and near the first side wall 11, and one end of the first push card 91 is connected to the first moving contact 211 in the first contact group of the contact structure 2. The second push card 92 is located in the base 1 and near the second side wall 12, and one end of the second push card 92 is connected to the second moving contact 221 in the second contact group of the contact structure 2 (for example, a compression spring can be provided at the second end 22 of the first spring 201, and one end of the second push card 92 is connected to the second moving contact 221 through the compression spring). The portion of the second push card 92 that does not correspond to the push structure protrudes towards the second side wall 12.

[0063] Continue to refer to Figure 1 The injection-molded part 73 of the magnetic circuit structure 7 also 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.

[0064] When a positive pulse voltage is applied to coil 62, permanent magnet 71 swings to one side, simultaneously causing armature 72 to swing, so that one armature 72 engages with the first yoke 74 and the other with the second yoke 75. Permanent magnet 71, armature 72, first yoke 74, iron core 63, and second yoke 75 form a constant magnetic field S1. Simultaneously, permanent magnet 71 causes first swing arm 732 and second swing arm 733 to swing. First swing arm 732 drives first push card 91 to move in the longitudinal Y direction, and first swing arm 732 causes first moving contact 211 to move closer to first stationary contact 212, causing first moving contact 211 to close with first stationary contact 212. The second swing arm 733 drives the second push card 92 to move in the longitudinal Y direction, causing the second swing arm 733 to move the second moving contact 221 closer to the second stationary contact 222, so that the second moving contact 221 and the second stationary contact 222 close, thereby closing the contact structure 2, that is, closing the relay and turning on the external load circuit. When the coil 62 is de-energized, the permanent magnet 71 can maintain the constant magnetic field S1, thereby maintaining the position of the first swing arm 732 and the second swing arm 733, and keeping the relay closed.

[0065] When a reverse pulse voltage is applied to coil 62, permanent magnet 71 swings to the other side, simultaneously causing armature 72 to swing to the other side. One armature 72 connects with the second yoke 75, and the other connects with the first yoke 74, forming another reverse constant magnetic field S1. Simultaneously, permanent magnet 71 causes the first swing arm 732 and the second swing arm 733 to swing in opposite directions, causing the first moving contact 211 and the first stationary contact 212 to disconnect, and the second moving contact 221 and the second stationary contact 222 to disconnect, i.e., the relay disconnects and the external load circuit is disconnected. When coil 62 is de-energized, permanent magnet 71 maintains the constant magnetic field S1, thereby maintaining the positions of the first swing arm 732 and the second swing arm 733, keeping the relay disconnected.

[0066] In this embodiment of the invention, the magnetic circuit structure 7 and the coil assembly 6 are offset relative to the second center line L2 of the contact structure 2. The portion of the second push card 92 that does not correspond to the contact structure 2 protrudes towards the second sidewall 12. The first push card 91 and the second push card 92 are not symmetrical structures. 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 can be different, and the swing radii of the first swing arm 732 and the second swing arm 733 can be different.

[0067] In summary, when the alternating current of the load is connected, the first alternating magnetic field S2 generated by the first stationary spring lead-out 3 may affect the constant magnetic field S1 generated by the magnetic circuit structure 7. In this embodiment of the invention, by setting the first center line L1 of the constant magnetic field S1 in the longitudinal Y direction to be offset from the second center line L2 between the first contact group and the second contact group, and closer to the second contact group, the magnetic circuit structure 7 is offset from the contact structure 2 and away from the first stationary spring lead-out 3, thereby avoiding the influence of the first alternating magnetic field S2 generated by the first stationary spring lead-out 3 on the magnetic field generated by the magnetic circuit structure 7, and improving the stability of the magnetic latching relay.

[0068] It is understood that the various embodiments / implementations provided by the present invention can be combined with each other without causing contradictions, and will not be described one by one here.

[0069] In this embodiment of the invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0070] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0071] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, the embodiments of the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of the present invention should be included within the protection scope of the embodiments of the present invention.

Claims

1. A magnetic latching relay, characterized in that, include: Base; A contact structure is provided on the base. The contact structure has a first end and a second end in the lateral direction. The first end is provided with a first contact group, and the second end is provided with a second contact group. The first static spring lead-out member has one end connected to the first end, and the other end extends vertically from the bottom of the base. as well as The coil assembly and magnetic circuit structure are disposed on the base and located on one side of the contact structure in the longitudinal direction; When a pulse voltage is applied to the coil assembly, the magnetic circuit structure and the coil assembly can form a constant magnetic field. The first center line of the constant magnetic field in the longitudinal direction is deviated from the second center line between the first contact group and the second contact group, and is closer to the second contact group, so that the constant magnetic field is away from the first stationary spring lead.

2. The magnetic latching relay according to claim 1, characterized in that, The coil assembly includes: A coil holder is mounted on the base; A coil is wound around the coil frame; The iron core is located in the coil frame; The first center line passes through the center of the coil frame.

3. The magnetic latching relay according to claim 2, characterized in that, The magnetic circuit structure includes: A permanent magnet is oscillatingly mounted on the base; An armature is disposed on the permanent magnet, and the armature protrudes from the permanent magnet in the lateral direction; The first yoke and the second yoke are fixed on the base and located on opposite sides of the coil assembly. One end of the first yoke is connected to one end of the iron core, and the other end of the first yoke can contact and connect with one end of the armature. One end of the second yoke is connected to the other end of the iron core, and the other end of the second yoke can contact and connect with the other end of the armature. When a pulse voltage is applied to the coil, the permanent magnet swings to one side, generating a constant magnetic field at the permanent magnet, the armature, the first yoke, the iron core, and the second yoke. 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, characterized in that, The first static spring lead-out member includes a first lead-out portion and a second lead-out portion. The first lead-out portion is connected to the first end of the contact structure, and the second lead-out portion is connected to the first lead-out portion and extends from the bottom of the base along the vertical direction of the base. The first lead-out portion has a guide groove that extends laterally from the side of the first lead-out portion near the second end and does not penetrate the first lead-out portion. The opening of the guide groove faces the second contact group.

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

6. The magnetic latching relay according to claim 4, characterized in that, The first contact group includes a first stationary contact and a first moving contact, and the second contact group includes a second stationary contact and a second moving contact; The contact structure has a first spring extending laterally, the first end of the first spring having two first stationary contacts, the second end of the first spring having two second moving contacts, and the first spring having a slot extending laterally from the second end of the first spring to between the two first stationary contacts. The guide groove of the first stationary spring lead-out member is located between the two first stationary contacts.

7. The magnetic latching relay according to claim 6, characterized in that, The contact structure also has a second spring parallel to the first spring, the first end of the second spring having two first moving contacts corresponding to two first stationary contacts respectively, and the second end of the second spring having two second stationary contacts corresponding to two second moving contacts respectively.

8. The magnetic latching relay according to claim 1, characterized in that, The distance between the first centerline and the second centerline is 6~9mm.

9. The magnetic latching relay according to claim 1, characterized in that, Also includes: The second static spring lead-out has one end connected to the second end, and the other end extends from the second end in a transverse direction away from the first contact group and protrudes from the side wall of the base.

10. The magnetic latching relay according to claim 9, characterized in that, Also includes: A lead-out foot is located outside the base, the lead-out foot extends along the vertical direction, and one end of the lead-out foot is connected to the end of the second static spring lead-out member located outside the base; wherein, the distance from the lead-out foot to the second contact group is greater than the distance from the first static spring lead-out member to the first contact group.

11. The magnetic latching relay according to claim 10, characterized in that, Also includes: An AC transformer, wherein the portion of the second static spring lead extending out of the base passes through the AC transformer, such that the AC transformer is located between the lead and the second contact group.

12. The magnetic latching relay according to any one of claims 1 to 11, characterized in that, The base has a first sidewall and a second sidewall opposite to each other in the lateral direction, the first sidewall being close to the first end of the contact structure and the second sidewall being close to the second end of the contact structure; Wherein, the portion of the first sidewall that does not correspond to the contact structure in the lateral direction is recessed inward, and the 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 according to claim 12, characterized in that, Also includes: A first push card is located in the base and close to the first side wall, and one end of the first push card is connected to the first moving contact in the first contact group of the contact structure. The second push card is located in the base and close to the second side wall. One end of the second push card is connected to the second moving contact in the second contact group of the contact structure. The part of the second push card that does not correspond to the contact structure protrudes towards the second side wall.

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