Magnetic latching relay

Abstract

The utility model relates to a magnetic latching relay, which comprises a seat body, a cover body and an armature assembly, the seat body and the cover body are oppositely jointed, a cavity is formed between the seat body and the cover body, the cover body is relatively arranged above the seat body, the seat body is relatively arranged below the cover body, and the magnetic latching relay also comprises an armature support arranged in the cavity. The armature assembly is arranged between the armature support and the seat body, the armature assembly comprises a pivot joint shaft, the upper end and the lower end of the pivot joint shaft are respectively pivoted on the armature support and the seat body, and the armature support and the seat body directly contact and abut against each other in the vertical direction. In the magnetic latching relay of the utility model, the seat body is directly pressed to the armature support, so that the armature support is not easy to shake, and the positioning is more reliable.

Description

Technical Field

[0001] This utility model relates to the field of switching electrical appliances, specifically to a magnetic latching relay. Background Technology

[0002] Existing magnetic latching relays include a magnetic circuit system, a contact system, and a push card. The magnetic circuit system typically includes a yoke, a coil, and an armature assembly. The contact system includes a moving spring and a stationary spring. The moving spring has a moving contact, and the stationary spring has a stationary contact. The armature assembly is connected to the push card, which is connected to the moving spring. When a positive pulse voltage is applied to the relay coil, the magnetic circuit system operates. The armature assembly drives the push card to move the moving spring, causing the moving contact to contact the stationary contact, and the relay is in the ON state. When a reverse pulse voltage is applied to the relay coil, the magnetic circuit system operates again. The armature assembly drives the push card back to its original position, which in turn drives the moving spring back to its original position, causing the moving contact to disengage from the stationary contact, thus opening the contact and putting the relay in the OFF state.

[0003] A typical magnetic latching relay housing includes a base and a cover. Its armature assembly is swing-type, comprising a pivot shaft, one end of which is pivotally connected to the base. An armature bracket is housed inside the relay housing, the other end of which is pivotally connected to the armature bracket. During installation, the armature assembly is typically inserted into the base first, followed by the armature bracket. Intermediate components separate the armature bracket from the base, meaning the armature bracket is suspended relative to the base and does not directly contact it. During the engagement of the base and cover, the pressure from the base is transmitted through these intermediate components to press against the armature bracket, thus positioning it. However, due to assembly gaps between these intermediate components, and the need for pressure transitions between multiple stages of components to achieve the desired pressure between the armature bracket and the base, the armature bracket in this structure often suffers from incomplete clamping and a tendency to wobble. Utility Model Content

[0004] Therefore, in order to address the above problems, this utility model proposes a magnetic latching relay with optimized structure.

[0005] This utility model is achieved using the following technical solution:

[0006] This utility model proposes a magnetic latching relay, including a base, a cover, and an armature assembly. The base and the cover are joined together to form a cavity between them. The cover is positioned above the base, and the base is positioned below the cover. The relay also includes an armature bracket installed in the cavity. The armature assembly is located between the armature bracket and the base. The armature assembly includes a pivot shaft, with its upper and lower ends pivotally connected to the armature bracket and the base, respectively. The armature bracket and the base are in direct vertical contact.

[0007] In one embodiment, preferably, the base body is provided with at least one upwardly protruding boss for direct contact and abutment with the armature bracket in the vertical direction; and / or, the armature bracket is provided with at least one downwardly protruding support leg for direct contact and abutment with the base body in the vertical direction.

[0008] In one embodiment, preferably, the armature support includes a support body and a positioning connection part. The support body is provided with a pivot hole for pivoting with the pivot shaft. The positioning connection part is positioned and engaged with the seat, or the positioning connection part is positioned and engaged with a part fixed relative to the seat, thereby limiting the swing of the armature support relative to the pivot shaft through the positioning and engaging connection.

[0009] In one embodiment, preferably, the positioning connection extends further downward relative to the bracket body, so that the lower end face of the bracket body and the lower end face of the positioning connection are not at the same height. The base is provided with a first boss and a second boss, and the first boss and the second boss respectively contact and abut with the bracket body and the positioning connection in the vertical direction.

[0010] In one embodiment, preferably, the positioning connection part has a U-shaped downward extending structure with a downward opening slot, and further includes a magnetic excitation component. The magnetic excitation component includes a yoke fixedly disposed in the cavity. The slot and the yoke are inserted and engaged in the vertical direction to realize the positioning and engagement connection.

[0011] 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.

[0012] In one embodiment, preferably, the inner side of the cover is provided with a downwardly extending limiting protrusion, the limiting protrusion being directly opposite the armature bracket to achieve upward limiting of the armature bracket, and multiple limiting protrusions are provided, the multiple limiting protrusions being symmetrically arranged on both sides of the pivot hole.

[0013] 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 faces of the magnetic excitation assembly that cooperate with the two swing arms. The positioning connection parts are provided in two symmetrically arranged on both sides of the pivot hole, and the two positioning connection parts are respectively positioned and connected to the two yokes.

[0014] In one embodiment, preferably, the inner side of the cover is provided with a downwardly extending limiting protrusion, which is directly opposite the armature bracket to achieve upward limiting of the armature bracket.

[0015] In one embodiment, preferably, it further includes a magnetic shielding plate disposed between the cover and the armature bracket, the magnetic shielding plate having a first clearance hole that engages with the limiting protrusion.

[0016] In one embodiment, preferably, the magnetic shielding plate is further provided with a second clearance hole that engages with the pivot shaft of the armature assembly.

[0017] In one embodiment, preferably, the magnetic shielding plate has an L-shaped bent structure, including a horizontal part and a vertical part, and a magnetic shielding plate mounting groove is provided on the base. The vertical part is inserted downward into the magnetic shielding plate mounting groove, and the horizontal part is adjacent to the lower end of the cover.

[0018] In one embodiment, preferably, at least one upwardly protruding boss is provided on the base body for direct contact and abutment with the armature bracket in the vertical direction, and at least part of the boss also serves as at least part of the installation limiting area of ​​the internal parts of the magnetic latching relay other than the armature bracket.

[0019] In one embodiment, preferably, it further includes a micro switch for being triggered in conjunction with the movement of the armature assembly, and at least one side of the boss is formed with a mounting groove having a vertical height, the micro switch being fixedly mounted in the mounting groove.

[0020] This invention offers the following advantages: In the magnetic latching relay of this invention, the base directly presses against the armature support, making the armature support less prone to wobbling and ensuring more reliable positioning. A downwardly extending limiting protrusion is fixed on the inner side of the cover, further restricting the upward movement of the armature support. The armature support includes a downwardly extending positioning connection portion, which serves both as a support leg for the armature support and as a means to prevent swaying. This positioning connection portion can cooperate with the yoke to save installation space, resulting in a compact overall relay structure and small size. Attached Figure Description

[0021] Figure 1 This is an exploded view of the magnetic latching relay in the embodiment;

[0022] Figure 2 This is a schematic diagram of the magnetic excitation component in the embodiment;

[0023] Figure 3 This is a schematic diagram of the armature assembly in the embodiment;

[0024] Figure 4 This is a schematic diagram of the armature support in the embodiment;

[0025] Figure 5 This is a schematic diagram of the base in the embodiment;

[0026] Figure 6 This is a schematic diagram of the magnetic excitation component, armature component, armature bracket, and micro switch assembled in the housing in the embodiment;

[0027] Figure 7 This is a schematic diagram of the cover in the embodiment;

[0028] Figure 8 This is a top view of the magnetic latching relay in the embodiment;

[0029] Figure 9 yes Figure 8 Sectional view at point AA;

[0030] Figure 10 This is a schematic diagram of the magnetic shielding plate in the embodiment;

[0031] Figure 11 This is a top view of the magnetic latching relay in the embodiment after the cover is removed. Detailed Implementation

[0032] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0033] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0034] See Figure 1-5 As shown, in a preferred embodiment of this utility model, a magnetic latching relay is provided, including a housing. The housing further includes a base 11 and a cover 12, which are joined and fixed together. In this embodiment, the base 11 and the cover 12 are fixed by a snap-fit ​​mechanism. For ease of description, in this embodiment, the cover 12 is defined as being positioned above the base 11, and the base 11 is positioned below the cover 12. Figure 1 In this context, T1 and T2 represent the up and down directions, respectively. The base 11 is a deep, box-shaped structure. After the base 11 and the cover 12 are joined, they form a roughly enclosed cavity 100 for installing the main functional components of the relay, including the magnetic circuit system, contact system, and push card. The magnetic circuit system includes a magnetic excitation assembly 5 and an armature assembly 3, such as... Figure 2The magnetic excitation assembly 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 sealing the magnetic circuit. In this embodiment, there are two yokes 54, which are fixedly connected to both ends of the coil frame 51 and connected to the iron core 53. The two yokes 54 are mirror-shaped "L" structures, with their free ends facing each other by inward folding. The two yokes 54 serve as the pole faces for magnetic attraction between the magnetic excitation assembly 5 and the armature assembly 3. The armature assembly 3 is movably mounted on one side of the magnetic excitation assembly 5. The armature assembly 3 is connected to a push card, which is connected to the moving spring part of the contact system. When the coil 52 is supplied with a forward / reverse voltage, the armature assembly 3 is driven to move forward / reverse through electromagnetic force. The armature assembly 3 drives the push card to push the moving spring part, causing the moving contact on the moving spring part to contact or separate from the stationary contact on the stationary spring part, thereby switching the on or off state of the relay. In this embodiment, the armature assembly 3 is a swing lever structure, including two swing arms 33 and 34, and two yokes 54 serve as the pole ends of the magnetic excitation assembly 5 and cooperate with the two swing arms 33 and 34 respectively.

[0035] 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, and the armature assembly 3 is disposed between the base 11 and the armature bracket 4, as shown below. Figure 3 , 5 A first pivot hole 110 is provided on the base 11, and the armature assembly 3 includes a pivot shaft, the first end 31 of which is pivotally connected in the first pivot hole 110. For example... Figure 4 The armature support 4 includes a support body 40, which is located on the side of the armature assembly 3 facing away from the first pivot hole 110. A second pivot hole 41 is provided on the support body 40. The second end 32 of the pivot shaft of the armature assembly 3 is pivotally connected to the second pivot hole 41, so that the two ends of the pivot shaft of the armature assembly 3 are respectively pivotally connected to the base 11 and the armature support 4, and the armature assembly 3 can swing along its pivot axis.

[0036] The armature bracket 4 also includes a positioning connection part 42. In this embodiment, the positioning connection part 42 is integrally connected to the bracket body 40. The positioning connection part 42 extends further downward relative to the bracket body 40, so that the lower end face of the bracket body 40 and the lower end face of the positioning connection part 42 are not at the same height. Figure 5 The seat 11 has an upwardly protruding first boss 112 and a second boss 113 inside. (See attached reference.) Figure 6 , 9The first boss 112 and the lower end face of the bracket body 40 abut each other vertically, and the second boss 113 and the lower end face of the positioning connection part 42 abut each other vertically. Thus, although the bracket body 40 of this embodiment is located 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 in the vertical direction. Compared with the prior art, where there are other intermediate parts between the armature bracket and the seat body 11, and the pressure of the seat body 11 is transmitted through these intermediate parts to press the armature bracket, the seat body 11 of this embodiment directly presses against the armature bracket 4, making the armature bracket 4 less prone to shaking and the positioning more reliable.

[0037] In this embodiment, the positioning connecting part 42 also functions as a support leg of the armature bracket 4, that is, the 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 or the upwardly protruding boss of the base 11 can be provided. In this embodiment, the first boss 112 abuts against the lower end face of the bracket body 40, and the second boss 113 abuts against the lower end face of the positioning connecting part 42, which can support the armature bracket 4 at multiple points, making the compressive force on the armature bracket 4 more uniform.

[0038] The first protrusion 112 and the second protrusion 113 serve as structures that support the armature bracket 4 upwards. Their shape, height, and number can be flexibly set according to the specific structure of the armature bracket 4. In this embodiment, because the lower end face of the positioning connection part 42 is not at the same height as the lower end face of the bracket body 40, two protrusions of different heights, the first protrusion 112 and the second protrusion 113, are provided as supports. If the armature bracket 4 in other embodiments does not have a positioning connection part 42, or if the lower end face of the positioning connection part 42 is at the same height as the lower end face of the bracket body 40, then only the first protrusion 112 can be provided. In this embodiment, the first protrusion 112 and the second protrusion 113 are integrally formed on the base 11, which facilitates the manufacturing of the first protrusion 112 and the second protrusion 113. In other embodiments, the first protrusion 112 and the second protrusion 113 can also be independently formed structures, fixed to the base 11 by additional fixing means such as screwing or bonding. The support leg structure formed by the positioning connection part 42 can also be flexibly set in the same way.

[0039] In this embodiment, the positioning connection part 42 has a U-shaped downward extending structure and a downward-opening slot 43. For example... Figure 6The yoke 54 is fixed within the cavity 100, and the slot 43 and the yoke 54 are inserted into each other in the vertical direction. The insertion fit between the slot 43 and the yoke 54 is preferably an interference fit, which improves the connection stability between the armature support 4 and the yoke 54. The positioning connection between the positioning connector 42 and the yoke 54 prevents the armature support 4 from swinging along the axis of the second pivot hole 41. In other embodiments, the armature support 4 can also be connected to the base 11, for example, by extending a boss structure from within the base 11, which inserts into the slot 43. The positioning connector 42 does not necessarily extend downwards; for example, the positioning connector 42 can extend towards the side wall of the base 11, where a boss that mates with it is provided. Alternatively, the positioning connector 42 can be configured as a protruding structure, with a slot provided on the base 11 for insertion of the positioning connector 42. In summary, it is feasible as long as the armature bracket 4 has a positioning connection part, and this positioning connection part can be positioned and connected with the base 11 or other parts that are fixed relative to the base 11 to prevent the armature bracket 4 from swinging along the axis of the second pivot hole 41. In this embodiment, the positioning connection part 42 is set as a downwardly extending U-shaped groove that is inserted into the yoke 54. The original structure of the yoke 54 can be utilized to cooperate with the positioning connection part 42, saving installation space.

[0040] Specifically, in this embodiment, two positioning connection parts 42 are provided, each corresponding to one of the two yokes 54. The two positioning connection parts 42 are symmetrically arranged on both sides of the second pivot hole 41. This not only improves the limiting effect on the armature bracket 4 but also creates a symmetrical force distribution, ensuring balanced force on the armature bracket 4 and preventing one end from tilting up during installation. Following the same principle, more than two positioning connection parts 42 can also be provided; as long as multiple positioning connection parts 42 are symmetrically arranged on both sides of the second pivot hole 41, a balanced force distribution effect can be achieved.

[0041] like Figure 7 A downwardly extending limiting protrusion 121 is fixedly provided on the inner side of the cover 12, directly opposite the armature bracket 4. This limiting protrusion 121 further restricts the upward movement of the armature bracket 4, improving its positional stability. It should be noted that the armature bracket 4 can be configured to allow for a suitable amount of vertical movement, facilitating its installation. In this embodiment, for example, the armature bracket 4 in its static state has a certain gap with the limiting protrusion 121, allowing for greater vertical installation clearance. In this case, the limiting protrusion 121 provides a better effect in limiting and preventing the armature bracket 4 from shifting. Of course, in other embodiments, the limiting protrusion 121 in the relay installation state can also directly press against the armature bracket 4.

[0042] In this embodiment, there are two spaced-apart limiting protrusions 121, which 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, there may also be more than two limiting protrusions 121 symmetrically arranged on both sides of the second pivot hole 41.

[0043] It is worth noting that, since this embodiment has a raised boss structure formed inside the base 11, these boss structures can also simultaneously serve as at least part of the mounting and limiting area for other internal relay components besides the armature bracket 4. For example, as Figure 1 , 5 6. The magnetic latching relay in this embodiment also includes a micro switch 2, which is triggered in conjunction with the movement of the armature assembly 3 to determine the state of the contact system. A mounting groove 115 with vertical height is formed on one side of the first boss 112, and the micro switch 2 is fixedly installed in the mounting groove 115, that is, the first boss 112 serves as part of the groove wall structure of the mounting groove 115. For example, the second boss 113 in this embodiment also serves as a positioning structure when the magnetic excitation assembly 5 is installed.

[0044] The relay also includes a magnetic shield 6, used to isolate the relay from external magnetic fields. Figure 1 , 5 9-11. The magnetic shielding plate 6 has an L-shaped bent structure, including a horizontal part 61 and a vertical part 62. A magnetic shielding plate mounting groove 114 is provided on the base 11, and the vertical part 62 is inserted downwards into the magnetic shielding plate mounting groove 114. The horizontal part 61 is adjacent to the lower end of the cover 12. The horizontal part 61 has a first clearance hole 611 and a second clearance hole 612. There is one second clearance hole 612, used to allow space for the second end 32 of the pivot shaft of the armature assembly 3. There are two first clearance holes 611, used to allow space for two limiting protrusions 121. The insertion and engagement of the second clearance hole 612 with the second end 32 of the pivot shaft of the armature assembly 3, and the insertion and engagement of the first clearance hole 611 with the limiting protrusions 121, also serve to position the magnetic shielding plate 6. The first clearance hole 611 and the second clearance hole 612 are triangularly distributed, which can achieve a more stable positioning effect.

[0045] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that any changes in form and detail made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims fall within the protection scope of the present invention.

Claims

1. A magnetic latching relay, comprising a base, a cover, and an armature assembly, wherein the base and the cover are engaged relative to each other and form a cavity between them, wherein the cover is positioned above the base and the base is positioned below the cover, characterized in that: It also includes an armature bracket installed in the cavity, the armature assembly being disposed between the armature bracket and the base, the armature assembly including 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 abutting in the vertical direction.

2. The magnetic latching relay according to claim 1, characterized in that: The base has at least one upwardly protruding boss for direct contact and abutment with the armature support in the vertical direction; and / or, the armature support has at least one downwardly protruding support leg for direct contact and abutment with the base in the vertical direction.

3. The magnetic latching relay according to claim 1, characterized in that: The armature support includes a support body and a positioning connection part. The support body is provided with a pivot hole for pivoting with the pivot shaft. The positioning connection part is positioned and engaged with the base body, or the positioning connection part is positioned and engaged with a part fixed relative to the base body, thereby limiting the swing of the armature support relative to the pivot shaft through the positioning and engaging connection.

4. The magnetic latching relay according to claim 3, characterized in that: The positioning connection extends further downward relative to the bracket body, so that the lower end face of the bracket body and the lower end face of the positioning connection are not at the same height. The base is provided with a first boss and a second boss, and the first boss and the second boss respectively contact and abut with the bracket body and the positioning connection in the vertical direction.

5. The magnetic latching relay according to claim 3, characterized in that: The positioning connection part has 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 disposed in the cavity. The slot and the yoke are inserted and engaged in the vertical direction to realize the positioning and engagement connection.

6. The magnetic latching relay according to claim 3 or 5, characterized in that: The positioning connection part is provided in multiple 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, characterized in that: The inner side of the cover is provided with a downwardly extending limiting protrusion, which is directly opposite the armature bracket to achieve upward limiting of the armature bracket. There are multiple limiting protrusions, which are symmetrically arranged on both sides of the pivot hole.

8. The magnetic latching relay according to claim 5, characterized in that: The armature assembly is a swing lever structure, including two swing arms. There are two yokes, which serve as the pole faces of the magnetic excitation assembly that cooperate with the two swing arms. There are two positioning connection parts symmetrically arranged on both sides of the pivot hole, and the two positioning connection parts are respectively positioned and connected to the two yokes.

9. The magnetic latching relay according to claim 1, characterized in that: The inner side of the cover is provided with a downwardly extending limiting protrusion, which is directly opposite the armature bracket to achieve upward limiting of the armature bracket.

10. The magnetic latching relay according to claim 9, characterized in that: It also includes a magnetic shielding plate disposed between the cover and the armature bracket, the magnetic shielding plate having a first clearance hole that engages with the limiting protrusion.

11. The magnetic latching relay according to claim 10, characterized in that: The magnetic shielding plate is also provided with a second clearance hole that engages with the pivot shaft of the armature assembly.

12. The magnetic latching relay according to claim 10, characterized in that: The magnetic shielding plate has an L-shaped bent structure, including a horizontal part and a vertical part. A magnetic shielding plate mounting groove is provided on the base. The vertical part is inserted downward into the magnetic shielding plate mounting groove, and the horizontal part is adjacent to the lower end of the cover.

13. The magnetic latching relay according to claim 1, characterized in that: The base has at least one upwardly protruding boss for direct contact and abutment with the armature bracket in the vertical direction. At least a portion of the boss also serves as a mounting limit area for internal parts of the magnetic latching relay other than the armature bracket.

14. The magnetic latching relay according to claim 13, characterized in that: It also includes a micro switch that is triggered in conjunction with the movement of the armature assembly, and at least one side of the boss is formed with a mounting groove having a vertical height, and the micro switch is fixedly installed in the mounting groove.

Images