Magnetic latching relay

Abstract

The utility model discloses a magnetic latching relay which comprises a shell and a cover body, the shell and the cover body are enclosed to form a first accommodating cavity, and a magnetic circuit assembly, a moving plate assembly and a static reed are sequentially arranged in the first accommodating cavity along a first direction; the magnetic circuit assembly comprises a static iron core fixedly arranged on the shell and a movable iron core which can be magnetically attracted by the static iron core to move in the first direction. The moving plate assembly comprises a moving plate support connected to the end, away from the static iron core, of the moving iron core, a moving reed which is arranged on the side, facing the static reed, of the moving plate support and moves in the first direction along with the moving plate support, and a moving iron core which can be magnetically attracted by the static iron core to move in the first direction. According to the technical scheme, the moving plate support and the moving reed arranged on the side, facing the static reed, of the moving plate support are driven to move in the first direction, the transmission precision between the magnetic circuit assembly and the movable contact and the static contact can be effectively improved on the whole, the transmission distance is reduced, the response speed of a product is increased, the size of the product is reduced, and miniaturization of the product is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a magnetic latching relay. Background Art

[0002] Relays are automatic switching elements with isolation functions. They are widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment, and are one of the most important control elements.

[0003] A latching relay is a type of relay that can function as a switch, changing between on and off states, and can also be held in one state by magnetic force. Specifically, the contacts of a latching relay are normally held in the open or closed state by the magnetic force generated by a permanent magnet. When the relay contacts need to be opened or closed, the coil is energized with a positive (or negative) DC pulse voltage, and the relay instantly completes the open and closed state transition. Furthermore, when the contacts are in the latched state, the coil does not need to be energized; the magnetic force of the permanent magnet alone maintains the relay's state.

[0004] However, the structure of existing magnetic latching relay products is complex, resulting in high production and assembly costs, low internal space utilization, and relatively large product size. At the same time, the transmission distance between the magnetic circuit component and the moving contact component causes the product's response speed to be slow.

[0005] Therefore, how to provide a magnetic latching relay to at least partially solve the above-mentioned drawbacks is a technical problem that those skilled in the art currently need to solve. Utility Model Content

[0006] The purpose of the utility model is to provide a magnetic latching relay, which can effectively improve the transmission accuracy between the magnetic circuit component and the contact between the moving and static contacts, reduce the transmission distance, increase the response speed of the product, reduce the volume of the product, and realize the miniaturization of the product.

[0007] To achieve the above object, the utility model provides a magnetic latching relay, comprising a housing and a cover, wherein the housing and the cover are combined to form a first accommodating cavity, wherein a magnetic circuit assembly, a moving plate assembly, and a static spring plate are sequentially arranged in the first accommodating cavity along a first direction;

[0008] The magnetic circuit assembly includes a static iron core fixed to the housing, and a movable iron core capable of being magnetically attracted by the static iron core to move along a first direction;

[0009] The movable piece assembly comprises a movable piece bracket connected to one end of the movable iron core away from the static iron core, and a movable spring piece arranged on a side of the movable piece bracket facing the static spring piece and moving along the first direction with the movable piece bracket.

[0010] Preferably, the magnetic circuit assembly includes two magnetic circuit units arranged along the second direction, a partition extending along the first direction to separate the two magnetic circuit units is provided in the housing, one end of the partition extending toward the movable plate assembly along the second direction to form a limiting portion, both ends of the limiting portion in the second direction extend toward the movable plate assembly to form a first notch, an abutting portion is provided on a side of the movable plate bracket facing the first notch, and a first elastic member for resetting the movable plate bracket is provided between the abutting portion and the first notch;

[0011] The first direction and the second direction are arranged at an angle.

[0012] Preferably, the first notch is recessed to form a second notch, and the housing is provided with a third notch;

[0013] The movable plate bracket is provided with a positioning groove extending along the first direction and passing through the abutment portion. The guide rod is passed through the positioning groove, and the two ends of the guide rod are respectively fixed to the second notch and the third notch for guiding the movement of the movable plate bracket.

[0014] Preferably, a card connector is provided at one end of the moving iron core facing away from the static iron core;

[0015] The movable plate bracket also includes two mating end portions, which are located on both sides of the abutting portion. Both mating end portions are provided with guide grooves, which are used to clamp the corresponding clamping joints; an inner concave space is formed between the two mating end portions, and the inner concave space can accommodate the limiting portion.

[0016] Preferably, the inner wall of the housing is provided with positioning protrusions, and the positioning protrusions are located on both sides of the limiting portion in the second direction.

[0017] Preferably, the rotor bracket further comprises two spaced apart mounting cavities, two first protrusions disposed in the corresponding mounting cavities, and two cavity wall through holes extending along the first direction and communicating with the corresponding mounting cavities;

[0018] A magnetic yoke is installed on the movable spring piece. The magnetic yoke includes a magnetic yoke body located on the side of the movable spring piece away from the static spring piece, and a magnetic yoke extension portion connected to the magnetic yoke body and extending toward the static spring piece. The magnetic yoke extension portion is penetrated by a through hole in the cavity wall. The magnetic yoke body is provided with a second protrusion corresponding to the first protrusion, and a second elastic member is provided between the first protrusion and the second protrusion to tighten the movable spring piece into the corresponding mounting cavity.

[0019] Preferably, the housing is further provided with a groove, in which a magnetic conductive sheet corresponding to the extension portion of the magnetic yoke is provided. When the movable spring sheet is connected to the corresponding static spring sheet, the magnetic conductive sheet magnetically attracts the extension portion of the magnetic yoke.

[0020] Preferably, each movable spring piece is provided with two positioning posts spaced apart in the second direction, and the yoke body is provided with positioning through holes adapted to the positioning posts for detachable connection between the movable spring piece and the yoke body.

[0021] Preferably, the magnetic circuit units include a static iron core, a moving iron core, and a coil assembly fixed to the shell. The coil assembly is provided with a magnet and a slot for the moving iron core to pass through. The magnet is connected to the static iron core through a yoke. When the coil assembly is energized, the static iron core can magnetically attract the moving iron core.

[0022] Preferably, the movable plate bracket is an integrated structure.

[0023] Compared with the above-mentioned background technology, the present invention provides a magnetic holding relay, including a shell and a cover, which are combined to form a first accommodating cavity, in which a magnetic circuit assembly, a movable plate assembly and a static spring plate are arranged in sequence along a first direction; the magnetic circuit assembly includes a static iron core fixed to the shell, and a movable iron core that can be magnetically attracted by the static iron core to move along the first direction; the movable plate assembly includes a movable plate bracket connected to the end of the movable iron core away from the static iron core, and a movable spring plate arranged on the side of the movable plate bracket facing the static spring plate and moving along the first direction with the movable plate bracket.

[0024] Specifically, the magnetic circuit assembly, the movable plate assembly and the static spring plate are arranged in sequence along the first direction. The movable iron core, which can be magnetically attracted by the static iron core to move along the first direction, drives the movable plate bracket and the movable spring plate arranged on the side of the movable plate bracket facing the static spring plate to move along the first direction. When the moving contact of the movable spring plate and the static contact of the static spring plate are in contact, the relay is in the circuit. When the moving contact of the movable spring plate and the static contact of the static spring plate are isolated, the relay is in the circuit. Through the above arrangement, the transmission accuracy between the magnetic circuit assembly and the moving and static contacts can be effectively improved as a whole, and the transmission distance can be reduced, thereby increasing the response speed of the product, reducing the volume of the product, and realizing the miniaturization of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0026] Figure 1 A schematic structural diagram of a magnetic latching relay provided in an embodiment of the present utility model;

[0027] Figure 2 A schematic structural diagram of a magnetic latching relay provided by an embodiment of the present utility model from another perspective;

[0028] Figure 3 A schematic structural diagram of a moving piece assembly provided in an embodiment of the present utility model;

[0029] Figure 4A structural schematic diagram of the moving piece assembly provided by an embodiment of the present utility model from another perspective;

[0030] Figure 5 A schematic structural diagram of the movable plate bracket provided in an embodiment of the present utility model;

[0031] Figure 6 A cross-sectional view of the structure of the moving piece assembly provided by an embodiment of the present utility model;

[0032] Figure 7 This is a schematic structural diagram of the movable spring provided in an embodiment of the present utility model.

[0033] in:

[0034] 100-housing, 110-positioning protrusion, 120-groove, 130-magnetic conductive sheet;

[0035] 200 - magnetic circuit assembly, 210 - static iron core, 220 - moving iron core, 221 - card connector, 230 - magnetic circuit unit, 231 - coil assembly, 232 - magnet, 233 - yoke, 240 - partition, 241 - limit portion, 242 - first notch, 243 - second notch;

[0036] 300 - movable plate assembly, 310 - movable plate bracket, 311 - abutting portion, 312 - positioning groove, 313 - mating end, 314 - guide groove, 315 - concave space, 316 - mounting cavity, 317 - first protrusion, 318 - cavity wall through-hole, 320 - movable reed, 321 - movable contact, 322 - positioning column, 331 - yoke body, 332 - yoke extension, 333 - second protrusion;

[0037] 400-static reed, 410-static contact;

[0038] 500-first elastic member;

[0039] 600-guide rod;

[0040] 700 - second elastic member. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0043] In the description of the present invention, it should be understood that the terms "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0044] The purpose of this utility model is to provide a magnetic latching relay that can effectively improve the transmission accuracy between the magnetic circuit component 200 and the contact between the moving and static contacts 410, reduce the transmission distance, increase the response speed of the product, reduce the volume of the product, and achieve miniaturization of the product.

[0045] It should be noted that, in this embodiment, the X direction in the drawings is defined as the first direction, the Y direction is defined as the second direction, and the first direction and the second direction are set at an angle.

[0046] See also Figure 1 and Figure 2 To achieve the above-mentioned object, the present invention provides a magnetic latching relay, comprising a housing 100 and a cover, wherein the housing 100 and the cover together form a first accommodating cavity, wherein a magnetic circuit assembly 200, a moving plate assembly 300, and a static reed 400 are sequentially arranged in the first direction in the first accommodating cavity;

[0047] The magnetic circuit assembly 200 includes a static iron core 210 fixed to the shell 100, and a movable iron core 220 that can be magnetically attracted by the static iron core 210 to move along a first direction, wherein the static iron core 210 is fixed to the shell 100, and when the static iron core 210 is magnetic, the movable iron core 220 can move along the first direction to be magnetically attracted to the static iron core 210.

[0048] The movable plate assembly 300 includes a movable plate bracket 310 connected to the end of the movable iron core 220 away from the static iron core 210, and a movable spring 320 provided on the side of the movable plate bracket 310 facing the static spring 400 and moving along the first direction with the movable plate bracket 310.

[0049] It should be noted that a static contact 410 is provided on the static spring piece 400, and a dynamic contact 321 corresponding to the static contact 410 is provided on the dynamic spring piece 320. When the dynamic piece bracket 310 and the dynamic spring piece 320 move toward the static iron core 210 along with the moving iron core 220, the static contact 410 and the dynamic contact 321 are separated. Conversely, the static contact 410 and the dynamic contact 321 are in contact.

[0050] The magnetic circuit assembly 200, the movable plate assembly 300 and the static spring plate 400 are arranged in sequence along the first direction. The movable iron core 220, which can be magnetically attracted by the static iron core 210 to move along the first direction, drives the movable plate bracket 310 and the movable spring plate 320 arranged on the side of the movable plate bracket 310 facing the static spring plate 400 to move along the first direction. When the moving contact 321 of the movable spring plate 320 and the static contact 410 of the static spring plate 400 are in contact, the relay is in a circuit. When the moving contact 321 of the movable spring plate 320 and the static contact 410 of the static spring plate 400 are isolated, the relay is in a circuit. Through the above arrangement, the transmission accuracy between the magnetic circuit assembly 200 and the contact between the movable and static contacts 410 can be effectively improved as a whole, and the transmission distance can be reduced, thereby increasing the response speed of the product, reducing the volume of the product, and realizing miniaturization of the product.

[0051] In this embodiment, the magnetic circuit assembly 200 includes two magnetic circuit units 230 arranged along the second direction, and a partition 240 extending along the first direction to isolate the two magnetic circuit units 230 is provided in the shell 100. The partition 240 extends along the second direction toward one end of the movable plate assembly 300 to form a limiting portion 241. Both ends of the limiting portion 241 in the second direction extend toward the movable plate assembly 300 to form a first slot 242. The movable plate bracket 310 is provided with an abutting portion 311 on the side facing the first slot 242, and a first elastic member 500 for resetting the movable plate bracket 310 is provided between the abutting portion 311 and the first slot 242. The first elastic member 500 can be a spring.

[0052] When the static iron core 210 magnetically attracts the moving iron core 220, the moving piece bracket 310 moves toward the limit portion 241, so that the first elastic member 500 is compressed, the static contact 410 and the moving contact 321 are separated, and the relay is open; when the magnetic force of the static iron core 210 disappears, the moving piece bracket 310 moves toward the static spring piece 400 under the elastic force of the compressed first elastic member 500, and drives the moving iron core 220 to move synchronously, so that the static contact 410 and the moving contact 321 are fitted together, and the relay is open.

[0053] In some embodiments, the second direction is perpendicular to the first direction.

[0054] The magnetic circuit unit 230 includes the above-mentioned static iron core 210, the above-mentioned moving iron core 220, and a coil assembly 231 fixed to the shell 100. The coil assembly 231 is provided with a magnet 232 and a slot for the moving iron core 220 to pass through. The magnet 232 is connected to the static iron core 210 through a yoke 233. After the coil assembly 231 is energized, the static iron core 210 can magnetically attract the moving iron core 220. Specifically, when the coil assembly 231 is not energized, the static iron core 210 has no magnetic force. When the coil assembly 231 is energized, the static iron core 210 has magnetic force. At the same time, the setting of the magnet 232 can improve the magnetic attraction effect of the static iron core 210 on the moving iron core 220 when the coil assembly 231 is energized.

[0055] In addition, the first slot 242 is recessed to form a second slot 243, and the shell 100 is provided with a third slot; the movable plate bracket 310 is provided with a positioning slot 312 extending along the first direction and passing through the abutment portion 311, and the guide rod 600 is passed through the positioning slot 312, and the two ends of the guide rod 600 are respectively fixed to the second slot 243 and the third slot, so that the movable plate bracket 310 moves along the extension direction of the guide rod 600, which is used to guide the movement of the movable plate bracket 310.

[0056] The inner wall of the housing 100 is provided with positioning protrusions 110 , which are located on both sides of the limiting portion 241 in the second direction. The magnetic circuit unit 230 is limited by the positioning protrusions 110 in conjunction with the partition 240 and the limiting portion 241 .

[0057] In this embodiment, a clamping joint 221 is provided at one end of the moving iron core 220 facing away from the static iron core 210. The clamping joint 221 is connected to the main part of the moving iron core 220 through a connecting rod, and the cross-sectional dimension of the clamping joint 221 perpendicular to the first direction is greater than the cross-sectional dimension of the connecting rod perpendicular to the first direction.

[0058] See also Figure 3 and Figure 4 The movable plate bracket 310 is an integrated structure, which makes the overall structure compact and convenient for miniaturization. The movable plate bracket 310 also includes two mating end portions 313, and the two mating end portions 313 are located on both sides of the abutting portion 311. The mating end portions 313 are provided with guide grooves 314, and the guide grooves 314 extend along a third direction, and the third direction is perpendicular to the plane where the first direction and the second direction are located, and the guide grooves 314 have an opening facing the static iron core 210. The connecting rod drives the card joint 221 to move relative to the guide groove 314 along the third direction, so that the guide grooves 314 can clamp the corresponding card joint 221.

[0059] Among them, an inner concave space 315 is formed between the two mating end portions 313, and the two mating end portions 313 have inclined surfaces on the sides facing each other, so that the inner concave space 315 is a flared structure, increasing the volume of the inner concave space 315, and the abutment portion 311 is specifically a columnar structure located in the inner concave space 315, which is used to fix the first elastic member 500. When the movable plate bracket 310 moves toward the limiting portion 241 driven by the moving iron core 220, the inner concave space 315 can accommodate the limiting portion 241, which is further conducive to the miniaturization of the product.

[0060] See also Figure 5 、 Figure 6 and Figure 7 It should be noted that the movable plate bracket 310 also includes two spaced installation cavities 316 , two first protrusions 317 arranged in the corresponding installation cavities 316 , and two cavity wall through holes 318 extending along the first direction and connected to the corresponding installation cavities 316 .

[0061] The two mounting cavities 316 are spaced apart in the third direction. A movable spring 320 is provided in each mounting cavity 316. A magnetic yoke is mounted on the movable spring 320. The magnetic yoke includes a yoke body 331 located on the side of the movable spring 320 facing away from the static spring 400, and a yoke extension 332 connected to the yoke body 331 and extending toward the static spring 400. The yoke extension 332 passes through the cavity wall through-hole 318. The yoke body 331 is provided with a second protrusion 333 corresponding to the first protrusion 317. , and a second elastic member 700 is provided between the first protrusion 317 and the second protrusion 333 to press the movable spring 320 into the corresponding mounting cavity 316. The second elastic member 700 can be a spring. The arrangement of the second elastic member 700 can play a certain buffering role when the static contact 410 and the movable contact 321 contact, so as to avoid multiple relative movements caused by excessive impact when the static contact 410 and the movable contact 321 contact as much as possible, so that the static contact 410 and the movable contact 321 are relatively stable.

[0062] The movable spring piece 320 is provided with two positioning posts 322 spaced apart in the second direction, and the yoke body 331 is provided with positioning through holes adapted to the positioning posts 322 for detachable connection between the movable spring piece 320 and the yoke body 331 .

[0063] In this embodiment, the cavity wall through-hole 318 adopts an "I" shape. The "I" shape includes two "I"-shaped structures connected by an "I"-shaped structure. The two "I"-shaped structures are used for the passage of the yoke extension 332. The two symmetrical "I"-shaped structures can prevent the yoke extension 332 from being offset when moving relative to the "I"-shaped structure, thereby ensuring that the positions of the movable spring piece 320 and the yoke body 331 are relatively fixed.

[0064] In addition, the connecting unit of the static spring piece 400 extends in the second direction, and the housing 100 is further provided with a groove 120, in which a magnetic conductive piece 130 corresponding to the magnetic yoke extension portion 332 is provided. When the movable spring piece 320 is connected to the corresponding static spring piece 400, the magnetic conductive piece 130 magnetically attracts the magnetic yoke extension portion 332.

[0065] The magnetic conductive sheet 130 is relatively fixed to the static spring sheet 400, and the magnetic yoke is relatively fixed to the movable spring sheet 320. The magnetic conductive sheet 130 and the magnetic yoke form a magnetic circuit based on the current passing through the movable spring sheet 320, which can form a magnetic attraction between the magnetic conductive sheet 130 and the magnetic yoke. As a result, when the relay is impacted by a large fault current, the static contact 410 and the movable contact 321 are less likely to disengage, thereby avoiding the generation of destructive arcs that damage the relay.

[0066] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0067] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0068] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A magnetic latching relay, characterized in that: The invention comprises a shell (100) and a cover, wherein the shell (100) and the cover are combined to form a first accommodating cavity, wherein a magnetic circuit assembly (200), a moving plate assembly (300) and a static spring plate (400) are sequentially arranged in the first accommodating cavity along a first direction; The magnetic circuit assembly (200) comprises a static iron core (210) fixed to the housing (100), and a movable iron core (220) capable of being magnetically attracted by the static iron core (210) to move along the first direction; The movable plate assembly (300) comprises a movable plate bracket (310) connected to one end of the movable iron core (220) facing away from the static iron core (210), and a movable spring (320) arranged on a side of the movable plate bracket (310) facing the static spring (400) and moving along the first direction with the movable plate bracket (310).

2. The magnetic latching relay according to claim 1, wherein: The magnetic circuit assembly (200) comprises two magnetic circuit units (230) arranged along a second direction; a partition (240) extending along a first direction to isolate the two magnetic circuit units (230) is provided in the housing (100); one end of the partition (240) toward the movable plate assembly (300) extends along the second direction to form a limiting portion (241); both ends of the limiting portion (241) in the second direction extend toward the movable plate assembly (300) to form a first notch (242); an abutting portion (311) is provided on one side of the movable plate bracket (310) toward the first notch (242); and a first elastic member (500) for resetting the movable plate bracket (310) is provided between the abutting portion (311) and the first notch (242); The first direction and the second direction are arranged at an angle.

3. The magnetic latching relay according to claim 2, wherein: The first notch (242) is recessed to form a second notch (243), and the housing (100) is provided with a third notch; The movable plate bracket (310) is provided with a positioning groove (312) extending along the first direction and passing through the abutting portion (311); the guide rod (600) is passed through the positioning groove (312), and the two ends of the guide rod (600) are respectively fixed to the second notch (243) and the third notch, for guiding the movement of the movable plate bracket (310).

4. The magnetic latching relay according to claim 2, wherein: One end of the moving iron core (220) facing away from the static iron core (210) is provided with a clamping joint (221); The movable plate bracket (310) further includes two mating end portions (313), the two mating end portions (313) being located on both sides of the abutting portion (311), and the mating end portions (313) are each provided with a guide groove (314), the guide groove (314) being used for clamping the corresponding clamping joint (221); an inner concave space (315) is formed between the two mating end portions (313), and the inner concave space (315) is capable of accommodating the limiting portion (241).

5. The magnetic latching relay according to claim 2, wherein: The inner wall of the housing (100) is provided with positioning protrusions (110), and the positioning protrusions (110) are located on both sides of the limiting portion (241) in the second direction.

6. The magnetic latching relay according to any one of claims 2 to 5, characterized in that: The movable plate bracket (310) further includes two spaced-apart mounting cavities (316), two first protrusions (317) disposed in the corresponding mounting cavities (316), and two cavity wall through-holes (318) extending in a first direction and communicating with the corresponding mounting cavities (316). A magnetic yoke is mounted on the movable spring piece (320), and the magnetic yoke comprises a magnetic yoke body (331) located on the side of the movable spring piece (320) facing away from the static spring piece (400), and a magnetic yoke extension portion (332) connected to the magnetic yoke body (331) and extending toward the static spring piece (400), wherein the magnetic yoke extension portion (332) passes through the cavity wall through hole (318), and the magnetic yoke body (331) is provided with a second protrusion (333) corresponding to the first protrusion (317), and a second elastic member (700) is provided between the first protrusion (317) and the second protrusion (333) to press the movable spring piece (320) into the corresponding mounting cavity (316).

7. The magnetic latching relay according to claim 6, wherein: The housing (100) is further provided with a groove (120), and a magnetic conductive sheet (130) corresponding to the yoke extension portion (332) is provided in the groove (120); when the movable spring sheet (320) is connected to the corresponding static spring sheet (400), the magnetic conductive sheet (130) magnetically attracts the yoke extension portion (332).

8. The magnetic latching relay according to claim 6, wherein: The movable spring piece (320) is provided with two positioning posts (322) spaced apart in the second direction, and the yoke body (331) is provided with positioning through holes adapted to the positioning posts (322) for detachable connection between the movable spring piece (320) and the yoke body (331).

9. The magnetic latching relay according to claim 6, wherein: The magnetic circuit unit (230) includes the static iron core (210), the moving iron core (220), and a coil assembly (231) fixed to the housing (100). The coil assembly (231) is provided with a magnet (232) and a slot for the moving iron core (220) to pass through. The magnet (232) is connected to the static iron core (210) through a yoke (233). When the coil assembly (231) is energized, the static iron core (210) can magnetically attract the moving iron core (220).

10. The magnetic latching relay according to claim 6, wherein: The moving piece bracket (310) is an integrated structure.

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