A magnetic latching relay pusher

Abstract

The utility model discloses a kind of pusher of magnetic latching relay, including flat pusher body, its top edge is equipped with a swing lever projection and the two spring leaf projections symmetrically located at the both sides of the swing lever projection, swing lever projection is equipped with swing lever slot, spring leaf projection is equipped with spring leaf slot, the bottom surface of pusher body is equipped with recess, swing lever slot and spring leaf slot two sides side wall are provided with installation groove, elastically pad is fixedly installed in installation groove, the surface of elastically pad is provided with wave-shaped projection protruding from side wall surface.The pusher fills up assembly gap through the wave-shaped projection of elastically pad, effectively suppresses axial excursion, guarantees contact pressure stability, improves contact reliability, and structure is simple, easily production realizes, with higher practical value.

Description

Technical Field

[0001] This utility model relates to the field of magnetic latching relay technology, specifically to a drive piece for a magnetic latching relay. Background Technology

[0002] In fields such as power electronics and automation control, magnetic latching relays, as control elements that maintain the contact state through the magnetic force of permanent magnets, are widely used in smart grids, smart homes, and industrial automation due to their low power consumption and high stability. The actuator, as the core transmission component inside the magnetic latching relay, has its structural design and assembly precision directly affecting the overall performance of the relay, especially playing a decisive role in key indicators such as contact reliability and operational stability.

[0003] In existing technologies, the push plate of a magnetic latching relay typically adopts a flat body structure. The top edge of the push plate has a swing rod protrusion and a spring plate protrusion, which are used to connect with the relay's swing rod, spring plate, and other actuators, respectively. Positioning and transmission are achieved through the swing rod slot and spring plate slot (as disclosed in our previous application: CN201811551432.6, push plate for a magnetic latching relay). However, in actual production and assembly processes, due to dimensional tolerances and cumulative assembly errors, it is often difficult to achieve a completely gapless, tight fit between the swing rod slot, spring plate slot, and the corresponding actuator, inevitably resulting in a certain assembly gap.

[0004] The presence of this gap can cause axial movement of the actuator plate during transmission. When the relay engages or disengages, this axial movement is directly transmitted to the contact mechanism, resulting in unstable contact pressure between the contacts. Specifically, when the contacts close, the pressure may be momentarily too high, leading to accelerated contact wear, or insufficient pressure may cause increased contact resistance and severe overheating. When the contacts open, the movement may prolong the arcing duration, accelerating contact oxidation and erosion. Over long-term operation, these problems will significantly reduce the lifespan and reliability of the magnetic latching relay, and may even lead to circuit failures, equipment damage, and other safety hazards.

[0005] Therefore, how to reduce or eliminate axial movement caused by assembly gaps by optimizing the structural design of the push plate has become one of the key technical issues for improving the performance of magnetic latching relays. Utility Model Content

[0006] To address the shortcomings of the prior art, this utility model provides a drive piece for a magnetic latching relay.

[0007] The technical solution adopted by this utility model is: a push plate for a magnetic latching relay, including a flat push plate body, with a swing rod protrusion and two spring plate protrusions symmetrically located on both sides of the swing rod protrusion on its top edge. The swing rod protrusion has a swing rod slot, and the spring plate protrusion has a spring plate slot. The bottom surface of the push plate body has a groove. The side walls of the swing rod slot and the spring plate slot have mounting grooves. An elastic pad is fixedly installed in the mounting groove. The surface of the elastic pad has a wavy protrusion protruding from the side wall surface.

[0008] Furthermore, an engagement groove is provided above the swing rod slot, and a reinforced stainless steel conductive sheet is embedded in the engagement groove. The reinforced stainless steel conductive sheet is partially exposed on the inner wall of the swing rod slot to form a static discharge path.

[0009] Furthermore, the sidewall of the flat push plate body is provided with crisscrossing grid-like reinforcing ribs, and the cross-section of a single reinforcing rib is a trapezoidal structure.

[0010] Furthermore, the elastic pad is made of polyurethane material, and the height of the wavy protrusion is 0.5-1.5mm.

[0011] Furthermore, the thickness of the reinforced stainless steel conductive sheet is 0.15-0.25 mm.

[0012] Furthermore, the sidewall of the flat push plate body is provided with crisscrossing grid-like reinforcing ribs, and the cross-section of a single reinforcing rib is a trapezoidal structure; the side length of each cell of the grid-like reinforcing rib is 2-4mm, and the grid thickness is 5%-15% of the thickness of the push plate body.

[0013] Furthermore, the push plate body is injection molded from PPS+40%GF composite material, and its heat distortion temperature is ≥260℃.

[0014] The beneficial effects of this utility model are:

[0015] 1. Effectively eliminates assembly gaps and suppresses axial movement. The elastic pad itself has good elastic deformation capability. The wavy protrusions on its surface, extending beyond the sidewall, form a tight contact with the actuator surface and generate moderate elastic compression during the assembly of the push plate and the actuator. This compression effect can fill the gaps caused by machining tolerances and assembly errors, ensuring a tight fit between the swing rod slot, spring plate slot, and the corresponding actuator. This reduces or even eliminates the axial movement of the push plate during transmission, ensuring the stability of the transmission process.

[0016] 2. Ensures stable contact pressure and improves contact reliability. Because axial movement is effectively suppressed, the actuator can precisely transmit power when driving the contact mechanism to engage or disengage, avoiding contact pressure fluctuations caused by movement. When the contacts close, it prevents excessive wear caused by sudden excessive pressure, while also avoiding problems such as increased contact resistance and severe overheating caused by insufficient pressure. When the contacts open, it reduces the prolonged arc duration caused by movement and lowers the rate of contact oxidation and erosion, thereby significantly improving contact reliability.

[0017] 3. The structural design is simple and easy to manufacture. The structural improvement involves only adding an installation groove and an elastic pad to the side wall of the card slot, without requiring complex modifications to the push plate body. The processing technology is simple, the cost is controllable, and it can be quickly promoted and applied in existing production processes, demonstrating high practical value and promising industrialization prospects.

[0018] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 Enlarged diagram of point A in the middle.

[0022] Figure 3 This is a side view of the present invention.

[0023] Figure 1-3 In the middle: 1. Flat push plate body; 2. A swing rod protrusion; 3. Spring plate protrusion; 4. Swing rod slot; 5. Spring plate slot; 7. Mounting groove; 8. Elastic pad; 9. Wavy protrusion; 10. Fitting groove; 11. Reinforced stainless steel conductive sheet; 12. Mesh reinforcing rib. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0026] This invention provides a drive piece for a magnetic latching relay.

[0027] In this embodiment, refer to Figure 1-3 The push plate of the magnetic latching relay includes a flat push plate body 1, with a swing rod protrusion 2 and two spring plate protrusions symmetrically located on both sides of the swing rod protrusion 2. The swing rod protrusion has a swing rod groove 4, and the spring plate protrusion has a spring plate groove 5. The bottom surface of the push plate body has a groove. The side walls of the swing rod groove and the spring plate groove are provided with mounting grooves 7. An elastic pad 8 is fixedly installed in the mounting groove 7. The surface of the elastic pad is provided with a wavy protrusion 9 protruding from the side wall surface.

[0028] In the above technical solution, mounting grooves are provided on both side walls of the swing rod slot and the spring plate slot. The surface of the elastic pad fixed in the mounting groove has protruding wavy protrusions. During assembly, the wavy protrusions contact the surface of the actuator and generate elastic compression, using the deformation capacity of the elastic pad to fill the gaps caused by tolerances and assembly errors. This effectively eliminates assembly gaps, suppresses axial movement, and ensures transmission stability; it also ensures stable contact pressure, reduces contact wear and oxidation erosion, and improves contact reliability.

[0029] Specifically, a fitting groove 10 is provided above the swing rod slot, and a reinforced stainless steel conductive sheet 11 is fitted inside the fitting groove 10. The reinforced stainless steel conductive sheet is partially exposed on the inner wall of the swing rod slot to form a static discharge path.

[0030] In this embodiment, a fitting groove is provided above the swing rod slot, into which a reinforced stainless steel conductive sheet is embedded, with a portion of the sheet exposed on the inner wall of the slot. When the push plate contacts the relevant components, the exposed portion forms a static discharge path, allowing static electricity to be discharged through the conductive sheet. This timely discharge of static electricity generated during relay operation prevents static accumulation from interfering with or damaging the internal electronic components of the relay, improving the stability and safety of relay operation, and is particularly suitable for static-sensitive working environments.

[0031] Specifically, the sidewall of the flat push plate body is provided with crisscrossing grid-like reinforcing ribs 12, and the cross section of a single reinforcing rib is trapezoidal.

[0032] In this embodiment, the sidewalls of the flat push plate body feature a crisscrossing grid of reinforcing ribs, each with a trapezoidal cross-section. The trapezoidal structure disperses stress, and the grid distribution strengthens the body structure from multiple directions, enhancing overall rigidity. This significantly improves the structural strength and deformation resistance of the push plate body, allowing it to better withstand external forces during transmission, reducing deformation caused by stress, and ensuring the transmission accuracy and service life of the push plate.

[0033] Specifically, the elastic pad is made of polyurethane material, and the height of the wavy protrusion is 0.5-1.5mm.

[0034] In this embodiment, polyurethane material has good elasticity and wear resistance, making it suitable for manufacturing elastic pads. The wavy protrusions with a height of 0.5-1.5mm ensure sufficient elastic deformation to fill gaps without causing assembly difficulties or excessive compression that could damage the components.

[0035] Specifically, the thickness of the reinforced stainless steel conductive sheet is 0.15-0.25 mm.

[0036] In this embodiment, the reinforced stainless steel conductive sheet with a thickness of 0.15-0.25mm ensures good conductivity without excessively increasing the volume and weight of the swing rod slot, and can also fit well into the slot to ensure the stability of the electrostatic discharge path.

[0037] Specifically, the sidewall of the flat push plate body is provided with crisscrossing grid-like reinforcing ribs, and the cross-section of a single reinforcing rib is a trapezoidal structure; the side length of each grid-like reinforcing rib is 2-4mm, and the grid thickness is 5%-15% of the thickness of the push plate body.

[0038] In this embodiment, grid-like reinforcing ribs with a cell side length of 2-4 mm and a thickness of 5%-15% of the push plate body thickness are distributed within a reasonable spatial range, and the trapezoidal cross-section further enhances the structural support capacity. This design can increase strength while avoiding excessive increase in the weight and material consumption of the push plate.

[0039] Specifically, the push plate body is injection molded from PPS+40%GF composite material, and its heat distortion temperature is ≥260℃.

[0040] In this embodiment, the PPS+40% GF composite material has excellent mechanical properties, high temperature resistance and corrosion resistance, and a heat distortion temperature ≥260℃. It can withstand the high temperature generated when the relay is working, and the injection molding process is convenient for manufacturing push plate bodies with complex shapes.

[0041] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A push plate for a magnetic latching relay, comprising a flat push plate body, a swing rod protrusion on its top edge and two spring plate protrusions symmetrically located on both sides of the swing rod protrusion, wherein the swing rod protrusion has a swing rod groove, the spring plate protrusions have spring plate grooves, and the bottom surface of the push plate body has a groove, characterized in that: The swing rod slot and the spring plate slot are provided with mounting grooves on both sides of the side wall. An elastic pad is fixedly installed in the mounting groove. The surface of the elastic pad is provided with a wavy protrusion that protrudes from the side wall surface.

2. The driving piece of the magnetic latching relay according to claim 1, characterized in that: A fitting groove is provided above the swing rod slot, and a reinforced stainless steel conductive sheet is fitted into the fitting groove. The reinforced stainless steel conductive sheet is partially exposed on the inner wall of the swing rod slot to form a static discharge path.

3. The driving piece of the magnetic latching relay according to claim 1, characterized in that: The sidewall of the flat push plate body is provided with crisscrossing grid-like reinforcing ribs, and the cross-section of a single reinforcing rib is trapezoidal.

4. The actuator of the magnetic latching relay according to claim 1, characterized in that: The elastic pad is made of polyurethane material, and the height of the wavy protrusion is 0.5-1.5mm.

5. The driving piece of the magnetic latching relay according to claim 2, characterized in that: The thickness of the reinforced stainless steel conductive sheet is 0.15-0.25 mm.

6. The driving piece of the magnetic latching relay according to claim 1, characterized in that: The sidewall of the flat push plate body is provided with crisscrossing grid-like reinforcing ribs, and the cross-section of a single reinforcing rib is a trapezoidal structure; the side length of each grid-like reinforcing rib is 2-4mm, and the grid thickness is 5%-15% of the thickness of the push plate body.

7. The driving piece of the magnetic latching relay according to claim 1, characterized in that: The push plate body is injection molded from PPS+40%GF composite material, and its heat distortion temperature is ≥260℃.

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