Magnetic latching relay

Abstract

The present application relates to a magnetic latching relay. The magnetic latching relay comprises a base body, a cover body and an armature assembly, wherein the base body and the cover body oppositely engage with each other, and a cavity is formed between the base body and the cover body; and it is defined that the cover body is located relatively above the base body, and the base body is located relatively below the cover body. The magnetic latching relay further comprises an armature bracket mounted in the cavity, wherein the armature assembly is arranged between the armature bracket and the base body, the armature assembly comprises a pivot shaft, upper and lower ends of the pivot shaft are pivoted to the armature bracket and the base body respectively, and the armature bracket and the base body are in direct contact and abut against each other in an up-down direction. In the magnetic latching relay of the present application, the base body directly presses against the armature bracket, so that the armature bracket is less likely to shake, and thus positioning is more reliable.

Description

Magnetic latching relay

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 17, 2024, with application number 202410068346.9 and application name “Magnetic Latching Relay”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of switching electrical appliances, and in particular to a magnetic latching relay. Background Art

[0003] The magnetic holding relay in the prior art includes structures such as a magnetic circuit system, a contact system and a push card. The magnetic circuit system usually includes a yoke, a coil, and an armature assembly. The contact system includes a moving spring and a static spring. The moving spring has a moving contact, and the static spring has a static contact. The armature assembly is connected to the push card, and the push card is connected to the moving spring part. When the relay coil is connected to a positive pulse voltage, the magnetic circuit system works, and the armature assembly drives the push card to push the moving spring to shift, so that the moving contact contacts the static contact, and the relay is in the on state; when the relay coil is connected to a reverse pulse voltage, the magnetic circuit system works again, the armature assembly drives the push card to return to its position, and the push card drives the moving spring to return to its position, the moving contact is disengaged from the static contact, so that the contacts are disconnected, and the relay is in the off state.

[0004] The housing of a conventional magnetic latching relay currently includes a base and a cover. Its armature assembly is swingable and includes a pivot shaft, one end of which is pivotally connected to the base. An armature bracket is disposed within the relay housing, the other end of which is pivotally connected to the armature bracket. During installation, the armature assembly is generally first installed into the base, and then the armature bracket is mounted on the armature assembly. Intermediate components are interposed between the armature bracket and the base, meaning that the armature bracket is suspended relative to the base and does not directly contact the base. During the engagement of the base and cover, pressure from the base is transferred to the armature bracket via these intermediate components to achieve positioning of the armature bracket. However, due to the assembly gaps between the intermediate components, the pressure transfer between the armature bracket and the base requires multiple levels of pressure transition between the components. Consequently, the armature bracket in this structure often suffers from loose fit and easy shaking.

[0005] Application Contents

[0006] Therefore, in order to solve the above problems, the present application proposes a magnetic latching relay with an optimized structure.

[0007] This application is implemented using the following technical solutions:

[0008] The present application proposes a magnetic latching relay, comprising a base, a cover, and an armature assembly, wherein the base and the cover are relatively engaged and form a cavity therebetween, and the cover is defined as being relatively above the base, and the base is relatively below the cover. The relay also comprises an armature bracket installed in the cavity, the armature assembly being arranged between the armature bracket and the base, the armature assembly comprising a pivot shaft, the upper and lower ends of the pivot shaft being pivotally connected to the armature bracket and the base, respectively, and the armature bracket and the base being in direct contact and abutment with each other in the upper and lower directions.

[0009] In one embodiment, preferably, at least one upwardly protruding boss is provided on the seat body for directly contacting and abutting the armature bracket in the up and down directions; and / or, at least one downwardly protruding supporting leg is provided on the armature bracket for directly contacting and abutting the seat body in the up and down directions.

[0010] In one embodiment, preferably, the armature bracket includes a bracket body and a positioning connection part, the bracket body is provided with a pivot hole for pivoting with the pivot shaft, the positioning connection part and the seat body are positioned and matched, or the positioning connection part and a part fixed relative to the seat body are positioned and matched, thereby limiting the swing of the armature bracket relative to the pivot shaft through the positioning and matching connection.

[0011] In one embodiment, preferably, the positioning connection portion extends further downward relative to the bracket body so that the lower end surface of the bracket body and the lower end surface of the positioning connection portion are not at the same height, and a first boss and a second boss are provided on the base body, and the first boss and the second boss are in contact with and abut against the bracket body and the positioning connection portion in the upper and lower directions respectively.

[0012] In one embodiment, preferably, the positioning connection portion is a "U"-shaped downward extending structure with a downward-opening slot, and also includes a magnetic excitation component, the magnetic excitation component includes a yoke fixedly arranged in the cavity, and the slot and yoke are plugged in and matched in the up and down directions to achieve the positioning fitting connection.

[0013] In one embodiment, preferably, there are multiple positioning connection parts, and the multiple positioning connection parts are symmetrically arranged on both sides of the pivot hole.

[0014] In one embodiment, preferably, a downward extending limiting protrusion is provided on the inner side of the cover body, and the limiting protrusion is directly opposite to the armature bracket to realize the upward limiting of the armature bracket. There are multiple limiting protrusions, and the multiple limiting protrusions are symmetrically arranged on both sides of the pivot hole.

[0015] In one embodiment, preferably, the armature assembly is a swing lever structure, including two swing arms, and two yokes are provided. The two yokes serve as the pole face ends for magnetic attraction and matching between the magnetic excitation assembly and the armature assembly, and the positioning connection parts are provided with two symmetrically arranged on both sides of the pivot hole, and the two positioning connection parts are respectively connected to the two yokes in a positioning manner.

[0016] In one embodiment, preferably, a downwardly extending limiting protrusion is provided on the inner side of the cover body, and the limiting protrusion is directly opposite to the armature bracket to achieve upward limiting of the armature bracket.

[0017] In one embodiment, preferably, it further includes a magnetic isolation plate arranged between the cover body and the armature bracket, and the magnetic isolation plate is provided with a first clearance hole that is plugged into and cooperates with the limiting protrusion.

[0018] In one embodiment, preferably, the magnetic isolation plate is further provided with a second clearance hole which is plugged into and matched with the pivot shaft of the armature assembly.

[0019] In one embodiment, preferably, the magnetic isolation plate is an L-shaped bending structure, including a horizontal portion and a vertical portion, and a magnetic isolation plate mounting groove is provided on the base body, the vertical portion is inserted downward into the magnetic isolation plate mounting groove, and the horizontal portion is adjacent to the lower end of the cover body.

[0020] In one embodiment, preferably, at least one upwardly protruding boss is provided on the base body for directly contacting and abutting the armature bracket in the up and down directions, and at least part of the boss also serves as at least a part of the installation limit area for the internal parts of the magnetic latching relay other than the armature bracket.

[0021] In one embodiment, preferably, a micro switch is further included, which is used to be triggered in conjunction with the movement of the armature assembly. A mounting groove with upper and lower heights is formed on one side of at least one of the bosses, and the micro switch is fixedly installed in the mounting groove.

[0022] The present application has the following beneficial effects: In the magnetic latching relay of the present application, the base directly presses against the armature bracket, making the armature bracket less susceptible to shaking and more reliably positioned. A downwardly extending limiting protrusion is fixedly provided on the inner side of the cover body to further limit the upward movement of the armature bracket. The armature bracket includes a downwardly extending positioning connection portion, which serves as a support leg for the armature bracket and also prevents the armature bracket from swinging. This positioning connection portion can cooperate with the yoke to save installation space, making the overall structure of the relay compact and small in size. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is an exploded view of the structure of a magnetic latching relay in an embodiment;

[0024] FIG2 is a schematic diagram of a magnetic excitation assembly in an embodiment;

[0025] FIG3 is a schematic diagram of an armature assembly in an embodiment;

[0026] FIG4 is a schematic diagram of an armature bracket in an embodiment;

[0027] FIG5 is a schematic diagram of a seat body in an embodiment;

[0028] FIG6 is a schematic diagram of the embodiment in which the magnetic excitation assembly, the armature assembly, the armature bracket, and the micro switch are assembled in the base body;

[0029] FIG7 is a schematic diagram of a cover body according to an embodiment;

[0030] FIG8 is a top view of a magnetic latching relay in an embodiment;

[0031] FIG9 is a cross-sectional view of FIG8 at AA;

[0032] FIG10 is a schematic diagram of a magnetic isolation plate in an embodiment;

[0033] FIG11 is a top view of the magnetic latching relay with the cover removed in the embodiment. Specific embodiments

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0036] To further illustrate various embodiments, this application includes accompanying drawings. These drawings form part of the disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this application. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0037] The present application will now be further described with reference to the accompanying drawings and specific implementation methods.

[0038] Referring to Figures 1-5, as a preferred embodiment of the present application, a magnetic latching relay is provided, comprising a housing, the housing further comprising a base 11 and a cover 12. The base 11 and cover 12 are joined and fixed together, such as in this embodiment, where the base 11 and cover 12 are fixed together by snapping. For ease of description, in this embodiment, the cover 12 is defined as being relatively above the base 11, while the base 11 is relatively below the cover 12, i.e., directions T1 and T2 in Figure 1 are the upper and lower directions, respectively. The base 11 is a deep, box-shaped structure. After the base 11 and cover 12 are joined, a substantially enclosed cavity 100 is formed between the two, which is used to mount the main functional components of the relay, including the magnetic circuit system, contact system, push card, etc. Among them, the magnetic circuit system includes a magnetic excitation component 5 and an armature component 3, as shown in Figure 2. The magnetic excitation component 5 includes a coil frame 51, a coil 52 wound on the coil frame 51, an iron core 53 passing through the coil 52, and a yoke 54 for closing the magnetic circuit. In this embodiment, there are two yokes 54, which are fixedly connected to the two ends of the coil frame 51 and connected to the iron core 53. The two yokes 54 are mirrored "L"-shaped structures, and their respective free ends are opposite to each other by folding inward. The two yokes 54 serve as pole face ends for magnetic attraction and matching between the magnetic excitation component 5 and the armature component 3. The armature assembly 3 is movably mounted on one side of the magnetic actuator assembly 5. The armature assembly 3 is connected to a push card, which in turn connects to the movable spring portion of the contact system. When a positive / reverse voltage is applied to the coil 52, the electromagnetic force drives the armature assembly 3 in the forward / reverse direction. The armature assembly 3 drives the push card to push the movable spring portion, causing the movable contact on the movable spring portion to contact or separate with the static contact on the static spring portion, thereby switching the relay's on / off state. In this embodiment, the armature assembly 3 is a swing lever structure, comprising two swing arms 33 and 34. Two yokes 54, serving as the pole faces of the magnetic actuator assembly 5, engage with the two swing arms 33 and 34, respectively. As shown in Figure 3, the armature assembly 3 includes two swing arms 33 and 34, and the two swing arms 33 and 34 respectively include an armature 331. When the two yokes 54 serve as the pole face ends of the magnetic excitation assembly 5 and cooperate with the two swing arms 33 and 34 respectively, the two yokes 54 serve as the pole face ends of the magnetic excitation assembly 5 and cooperate with the armature 331 connected to the two swing arms 33 and 34 respectively.Specifically, when the coil 52 is passed through a positive / reverse voltage, the electromagnetic force drives the armature assembly 3 to move forward / reverse, and the two yokes 54 alternately cooperate with the armature 331 connected to the two swing arms 33, 34, that is, when the coil 52 is passed through a positive voltage, the electromagnetic force drives the armature assembly 3 to move forward. At this time, the first yoke 54 of the two yokes 54 cooperates with the armature 331 connected to one of the two swing arms 33, 34, and the second yoke 54 does not cooperate with the armature 331 connected to the other of the two swing arms 33, 34; when the coil 52 is passed through a reverse voltage, the electromagnetic force drives the armature assembly 3 to move reversely. At this time, the first yoke 54 of the two yokes 54 does not cooperate with the armature 331 connected to one of the two swing arms 33, 34, and the second yoke 54 cooperates with the armature 331 connected to the other of the two swing arms 33, 34.

[0039] In this embodiment, the movable assembly of the armature assembly 3 is achieved through the base 11 and the armature bracket 4. The armature bracket 4 is positioned within the cavity 100, with the armature assembly 3 disposed between the base 11 and the armature bracket 4. As shown in Figures 3 and 5, the base 11 is provided with a first pivot hole 110. The armature assembly 3 includes a pivot shaft, the first end 31 of which is pivotally connected to the first pivot hole 110. As shown in Figure 4, the armature bracket 4 includes a bracket body 40, which is disposed on the side of the armature assembly 3 facing away from the first pivot hole 110. The bracket body 40 is provided with a second pivot hole 41, the second end 32 of the pivot shaft of the armature assembly 3 is pivotally connected to the second pivot hole 41. As a result, the two ends of the pivot shaft of the armature assembly 3 are respectively pivotally connected to the base 11 and the armature bracket 4, allowing the armature assembly 3 to swing along its pivot axis. As shown in FIG5 , the first pivot hole 110 is a square hole, so when the first end of the pivot shaft is pivoted in the first pivot hole 110, it is equivalent to the cylindrical pivot shaft being pivoted to the square first pivot hole 110, thereby reducing friction and making the pivot shaft reliable when moving relative to the first pivot hole 110, thereby reducing the risk of failure.

[0040] The armature support 4 also includes a positioning connection portion 42. In this embodiment, the positioning connection portion 42 is integrally connected to the support body 40. The positioning connection portion 42 extends downward relative to the support body 40, resulting in unequal heights between the lower end surface of the support body 40 and the lower end surface of the positioning connection portion 42. As shown in Figure 5, a first upwardly projecting boss 112 and a second upwardly projecting boss 113 are provided within the base 11. Referring to Figures 6 and 9, the first boss 112 abuts against the lower end surface of the support body 40, while the second boss 113 abuts against the lower end surface of the positioning connection portion 42. Thus, although the bracket body 40 of this embodiment is arranged on the side of the armature assembly 3 facing away from the first pivot hole 110, the armature bracket 4 and the seat body 11 are in direct contact and abutment with each other in the vertical direction. Compared with the solution in the prior art in which other intermediate parts are interposed between the armature bracket and the seat body 11 and the pressure of the seat body 11 is transmitted through these intermediate parts to compress the armature bracket, the seat body 11 of this embodiment directly presses against the armature bracket 4, making the armature bracket 4 less likely to shake and more reliably positioned.

[0041] In this embodiment, the positioning connection portion 42 actually also serves as a support leg for the armature bracket 4. That is, this support leg extending downward from the armature bracket 4 ensures direct contact between the armature bracket 4 and the base 11. It is understood that to achieve direct contact between the armature bracket 4 and the base 11, only one of the downwardly extending support leg of the armature bracket 4 and the upwardly protruding boss of the base 11 can be provided. In this embodiment, the first boss 112 is provided to contact the lower end surface of the bracket body 40, and the second boss 113 is provided to contact the lower end surface of the positioning connection portion 42. This supports the armature bracket 4 at multiple points, ensuring a more uniform compressive force on the armature bracket 4.

[0042] The first and second bosses 112, 113 serve as structures that support the armature support 4 upward. Their shape, height, and number can be flexibly configured based on the specific structure of the armature support 4. For example, in this embodiment, because the lower end surface of the locating connection portion 42 is not at the same height as the lower end surface of the support body 40, two bosses of different heights, the first and second bosses 112, 113, are provided for support. In other embodiments, if the armature support 4 does not have a locating connection portion 42, or if the lower end surface of the locating connection portion 42 is at the same height as the lower end surface of the support body 40, only the first boss 112 can be provided. In this embodiment, the first and second bosses 112, 113 are integrally formed on the base 11, facilitating their manufacture. In other embodiments, the first and second bosses 112, 113 can also be independently formed structures and secured to the base 11 via additional fixing means, such as screwing or bonding. Similarly, the support leg structure formed by the locating connection portion 42 can be flexibly configured.

[0043] In this embodiment, the positioning connection portion 42 is a "U"-shaped downward extending structure having a downwardly opening slot 43. As shown in Figure 6, the yoke 54 is fixed in the cavity 100, and the slot 43 and the yoke 54 are plugged in and matched in the up and down directions. The plug-in fit of the slot 43 and the yoke 54 is preferably an interference fit, so that the connection stability of the armature bracket 4 and the yoke 54 is better. The positioning connection between the positioning connection portion 42 and the yoke 54 can prevent the armature bracket 4 from swinging along the axis of the second pivot hole 41. In other embodiments, the armature bracket 4 can also be connected to the base body 11, for example, a boss structure extends from the base body 11, and the boss structure is plugged into the slot 43. The positioning connection portion 42 does not necessarily have to extend downward. For example, the positioning connection portion 42 can extend toward the side wall of the base body 11, and the side wall of the base body 11 is provided with a boss that cooperates with it. Alternatively, the positioning connection portion 42 can be configured as a protruding structure, with a slot provided on the base 11 for the positioning connection portion 42 to insert into. In short, as long as the armature bracket 4 has a positioning connection portion that can be positioned and engaged with the base 11 or other fixed component relative to the base 11 to prevent the armature bracket 4 from swinging along the axis of the second pivot hole 41, the arrangement is feasible. In this embodiment, the positioning connection portion 42 is configured as a downwardly extending U-shaped slot that plugs into the yoke 54. This allows the existing structure of the yoke 54 to be utilized with the positioning connection portion 42, saving installation space.

[0044] Specifically, in this embodiment, two positioning connections 42 are provided, each corresponding to and interfacing with the two yokes 54. These two positioning connections 42 are symmetrically arranged on either side of the second pivot hole 41. This not only enhances the positional restraint of the armature bracket 4 but also creates a bilaterally symmetrical force distribution, ensuring balanced force distribution on the armature bracket 4 and preventing one end of the armature bracket 4 from tilting during installation. Based on the same principle, more than two positioning connections 42 can be provided; as long as multiple positioning connections 42 are symmetrically arranged on either side of the second pivot hole 41, a balanced force distribution effect can be achieved.

[0045] As shown in Figure 7, a downward-extending limiting protrusion 121 is fixedly provided on the inner side of the cover body 12. The limiting protrusion 121 is directly opposite the armature bracket 4. The limiting protrusion 121 can further limit the upward movement of the armature bracket 4, thereby improving the positional stability of the armature bracket 4. It should be noted that the armature bracket 4 can be implemented to allow an appropriate amount of upward and downward movement, thereby facilitating the installation of the armature bracket 4. For example, in this embodiment, there is a certain gap between the armature bracket 4 and the limiting protrusion 121 in the static state, which allows for a larger installation margin for the armature bracket 4 in the vertical direction. In this case, the limiting protrusion 121 can achieve a better effect in limiting the position and preventing the armature bracket 4 from moving. Of course, in other embodiments, the limiting protrusion 121 can also directly press against the armature bracket 4 when the relay is installed.

[0046] In this embodiment, two limiting protrusions 121 are provided, spaced apart from each other, and are symmetrically arranged on both sides of the second pivot hole 41. Thus, the limiting protrusions 121 can also effectively prevent the armature bracket 4 from tilting. Of course, more than two limiting protrusions 121 can also be provided, symmetrically arranged on both sides of the second pivot hole 41.

[0047] It is worth noting that, because this embodiment forms a high-height boss structure within the base 11, these boss structures can also simultaneously serve as at least a portion of the mounting limit area for other internal relay components, in addition to the armature bracket 4. For example, as shown in Figures 1, 5, and 6, the magnetic latching relay of this embodiment also includes a microswitch 2, which is used to be triggered in conjunction with the movement of the armature assembly 3 to determine the state of the contact system. A mounting groove 115 with a vertical height is formed on one side of the first boss 112. The microswitch 2 is fixedly mounted within the mounting groove 115, that is, the first boss 112 serves as a portion of the groove wall structure of the mounting groove 115. For another example, the second boss 113 of this embodiment also serves as a positioning structure during the installation of the magnetic excitation assembly 5.

[0048] The relay also includes a magnetic isolation plate 6 for isolating the relay from the external magnetic field. As shown in Figures 1, 5, 9-11, the magnetic isolation plate 6 is an L-shaped bent structure, including a horizontal portion 61 and a vertical portion 62. A magnetic isolation plate mounting groove 114 is provided on the base 11, and the vertical portion 62 is inserted downward into the magnetic isolation plate mounting groove 114. The horizontal portion 61 is adjacent to the lower end of the cover 12. A first clearance hole 611 and a second clearance hole 612 are provided on the horizontal portion 61. The second clearance hole 612 is provided with one clearance hole for making way for the second end 32 of the pivot shaft of the armature assembly 3, and the first clearance hole 611 is provided with two clearance holes for making way for the two limiting protrusions 121. The plug-in cooperation between the second clearance hole 612 and the second end 32 of the pivot shaft of the armature assembly 3, and the plug-in cooperation between the first clearance hole 611 and the limiting protrusion 121, also play the role of positioning the magnetic isolation plate 6. The first clearance holes 611 and the second clearance holes 612 are distributed in a triangle, which can achieve a more stable positioning effect.

[0049] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0050] Although alternative embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including alternative embodiments and all changes and modifications that fall within the scope of the present invention.

[0051] The above is a detailed introduction to the technical solution provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. At the same time, for those skilled in the art, according to the principles and implementation methods of the present application, there may be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A magnetic latching relay, comprising a base, a cover, and an armature assembly, wherein the base and the cover are relatively joined to form a cavity therebetween, wherein the cover is relatively located above the base, and the base is relatively located below the cover, wherein: It also includes an armature bracket installed in the cavity, the armature assembly is arranged between the armature bracket and the seat body, the armature assembly includes a pivot shaft, the upper and lower ends of the pivot shaft are respectively pivoted to the armature bracket and the seat body, and the armature bracket is in direct contact with the seat body in the upper and lower directions.

2. The magnetic latching relay according to claim 1, wherein: The seat body is provided with at least one upwardly protruding boss for directly contacting and abutting against the armature bracket in the vertical direction; and / or the armature bracket is provided with at least one downwardly protruding supporting leg for directly contacting and abutting against the seat body in the vertical direction.

3. The magnetic latching relay according to claim 1, wherein: The armature bracket includes a bracket body and a positioning connection part, the bracket body is provided with a pivot hole for pivoting with the pivot shaft, the positioning connection part and the seat body are positioned and matched, or the positioning connection part and a part fixed relative to the seat body are positioned and matched, so as to limit the swing of the armature bracket relative to the pivot shaft through the positioning and matching connection.

4. The magnetic latching relay according to claim 3, wherein: The positioning connection portion extends further downward relative to the bracket body so that the lower end surface of the bracket body and the lower end surface of the positioning connection portion are not at the same height. The seat body is provided with a first boss and a second boss, which are in contact with and abut against the bracket body and the positioning connection portion in the upper and lower directions respectively.

5. The magnetic latching relay according to claim 3, wherein: The positioning connection portion is a "U"-shaped downward extending structure with a downwardly opening slot, and also includes a magnetic excitation component, which includes a yoke fixedly arranged in the cavity, and the slot and the yoke are plug-fitted in the up and down directions to achieve the positioning fitting connection.

6. The magnetic latching relay according to claim 3 or 5, wherein: There are multiple positioning connection parts, and the multiple positioning connection parts are symmetrically arranged on both sides of the pivot hole.

7. The magnetic latching relay according to claim 6, wherein: A downwardly extending limiting protrusion is provided on the inner side of the cover body, and the limiting protrusion is directly opposite to the armature bracket to realize upward limiting of the armature bracket. There are multiple limiting protrusions, and the multiple limiting protrusions are symmetrically arranged on both sides of the pivot hole.

8. The magnetic latching relay according to claim 5, wherein: The armature assembly is a swing lever structure, including two swing arms, and two yokes are provided. The two yokes serve as the pole surface ends for magnetic attraction and matching between the magnetic excitation assembly and the armature assembly. The positioning connection parts are provided with two symmetrically arranged on both sides of the pivot hole, and the two positioning connection parts are respectively connected to the two yokes in a positioning manner.

9. The magnetic latching relay according to claim 1, wherein: A downwardly extending limiting protrusion is provided on the inner side of the cover body, and the limiting protrusion is directly opposite to the armature bracket to realize upward limiting of the armature bracket.

10. The magnetic latching relay according to claim 9, wherein: It also includes a magnetic isolation plate arranged between the cover body and the armature bracket, and the magnetic isolation plate is provided with a first clearance hole that is plugged and matched with the limiting protrusion.

11. The magnetic latching relay according to claim 10, wherein: The magnetic isolation plate is also provided with a second clearance hole which is plugged and matched with the pivot shaft of the armature assembly.

12. The magnetic latching relay according to claim 10, wherein: The magnetic isolation plate is an L-shaped bending structure, including a horizontal portion and a vertical portion. A magnetic isolation plate mounting groove is provided on the base body, the vertical portion is inserted downward into the magnetic isolation plate mounting groove, and the horizontal portion is adjacent to the lower end of the cover body.

13. The magnetic latching relay according to claim 1, wherein: At least one upwardly protruding boss is provided on the base body, which is used to directly contact and abut against the armature bracket in the up and down directions, and at least a part of the boss also serves as at least a part of the installation limiting area for the internal parts of the magnetic latching relay other than the armature bracket.

14. The magnetic latching relay according to claim 13, wherein: It further includes a microswitch, which is used to be triggered in cooperation with the movement of the armature assembly. An installation groove with an up and down height is formed on one side of at least one of the bosses, and the microswitch is fixedly installed in the installation groove.

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