A moving spring part and a relay

Abstract

This utility model discloses a moving spring component and a relay. The moving spring component includes a conductive bridge plate and multiple moving spring components. Each moving spring component includes a moving spring sheet and a moving contact. The multiple moving spring components are arranged sequentially along the length of the bridge plate, and the moving spring sheets of each moving spring component are respectively connected to the bridge plate. The moving spring sheets of each moving spring component are forked to form multiple elastic support pieces arranged side by side along the length of the bridge plate, and each elastic support piece is provided with the moving contact. Each moving spring component of this utility model can realize a multi-contact parallel design. Since multiple elastic support pieces are formed from the same moving spring sheet, not only is the installation process simplified, but the flatness is also effectively guaranteed, thereby significantly improving the synchronization of multi-contact operation.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to a moving spring part and a relay. Background Technology

[0002] In recent years, electromagnetic relays have been increasingly widely used in the photovoltaic inverter industry. With intensifying industry competition, companies are increasing the power of individual inverters to reduce cable and distribution cabinet costs, thereby lowering the cost of electricity generated by photovoltaic power. This trend places higher demands on relays: on the one hand, relays need to handle increasingly larger load currents; on the other hand, they need to be small in size, generate less heat, and be cost-effective. Current technologies typically use thicker moving springs to meet the increased load current requirements and use multiple contacts connected in parallel to reduce the contact resistance of the main circuit, thus reducing heat generation. However, this parallel structure of multiple contacts presents significant synchronization problems. With multiple contacts connected in parallel, they influence each other, making it difficult to achieve synchronized operation. During switching, uneven burning is prone to occur on the contacts. Severely burned contacts will experience more severe burning, which not only reduces their lifespan but also easily leads to premature contact failure, thus affecting the overall performance and reliability of the relay. Utility Model Content

[0003] This utility model addresses the technical problems existing in the prior art by providing a moving spring part and a relay. Through structural improvements, it enhances the synchronization of contact actions while reducing mutual interference between moving contacts, based on the realization of parallel connection of multiple contacts.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a moving spring part, including a conductive bridge plate and a plurality of moving spring components, each moving spring component including a moving spring sheet and a moving contact, the plurality of moving spring components being arranged sequentially along the length direction of the bridge plate, and the moving spring sheets of each moving spring component being connected to the bridge plate respectively; the moving spring sheets of each moving spring component are forked to form a plurality of elastic support sheets arranged in parallel along the length direction of the bridge plate, and each elastic support sheet is provided with the moving contact.

[0005] In a preferred embodiment, the movable spring includes a fixed part, a deformable part, and a movable part. The deformable part is bent, and its two ends are respectively connected to the fixed part and the movable part. The fixed part is connected to the bridge plate and is located on the back side of the movable part. The movable part forms a plurality of elastic support pieces by forking. The movable contact is provided at the same position of the plurality of elastic support pieces, and the contact surface of the movable contact is located on the front side of the movable part.

[0006] In a preferred embodiment, the forked groove formed between adjacent elastic support pieces extends from the tail end of the movable part to the connection between the deformable part and the movable part; the moving contact is respectively provided at the end position of each elastic support piece.

[0007] In a preferred embodiment, the movable part is tilted toward the side closer to the fixed part when the contact is disconnected.

[0008] In a preferred embodiment, the fixing part is riveted to the bridging plate, and the bridging plate is located between the fixing part and the movable part.

[0009] In a preferred embodiment, the movable spring is composed of multiple flexible springs stacked together, and there is a gap between the deformed portions of adjacent flexible springs.

[0010] In a preferred embodiment, the fixed part, the deformable part, and the movable part are integrally formed, and the deformable part is U-shaped or arc-shaped.

[0011] In a preferred embodiment, there are two moving spring components.

[0012] This utility model also provides a relay, including a stationary spring portion and a moving spring portion as described above. The stationary spring portion includes stationary spring components respectively provided for each moving spring component. Each stationary spring component includes a stationary spring sheet and a plurality of stationary contacts arranged in parallel on the stationary spring sheet. The moving contacts of each moving spring component correspond one-to-one with the stationary contacts of the corresponding stationary spring component.

[0013] In a preferred embodiment, it further includes a magnetic circuit portion corresponding to each moving spring component, and the armature component of each magnetic circuit portion pushes the respective elastic support plate of the moving spring component through a pushing structure.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Because the moving spring plates of each moving spring component are formed by forks to create multiple elastic support plates arranged parallel along the length of the bridging plate, and each elastic support plate is provided with a moving contact, each moving spring component of this utility model can achieve a multi-contact parallel design. Furthermore, since multiple elastic support plates are formed from the same moving spring plate, not only is the installation process simplified, but the flatness is also effectively guaranteed, thus significantly improving the synchronization of multi-contact operation. In addition, adjacent elastic support plates are separated from each other by forked slots. This design makes the operation process of the moving contacts relatively independent, optimizing the ablation of individual contacts and thus significantly improving the overall service life.

[0016] 2. The moving spring includes a fixed part, a deformable part, and a movable part. The fixed part and the movable part are connected by the deformable part, which can transfer the stress concentration area from the fixed part and reduce the stress concentration in the fixed part.

[0017] 3. The movable part is inclined towards the side closer to the fixed part, so that the movable part forms a certain pre-pressure, which helps to improve the contact breaking speed, enhance the action response, and ensure that the arc is extinguished quickly.

[0018] 4. The moving spring is composed of multiple flexible springs stacked together, which can improve the overall flexibility of the moving spring while ensuring the current carrying capacity.

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the spring portion and relay of the present invention are not limited to the embodiments. Attached Figure Description

[0020] Figure 1 This is an exploded view of the movable spring part of this utility model;

[0021] Figure 2 This is an exploded view of the movable spring of this utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the moving spring part of this utility model;

[0023] Figure 4 This is a front view of the movable spring portion of this utility model;

[0024] Figure 5 This is a side view of the movable spring portion of this utility model;

[0025] Figure 6 This is a schematic diagram showing the cooperation of the magnetic circuit part, contact part, and driving structure of the relay of this utility model;

[0026] Figure 7 yes Figure 6 Side view;

[0027] Figure 8 This is an exploded view of the pushing structure of this utility model (including the armature component);

[0028] Figure 9 This is a front view of the plastic part of this utility model;

[0029] Figure 10 This is a top view of the plastic part of this utility model;

[0030] Figure 11 This is a schematic diagram of the structure of the pusher component of this utility model;

[0031] Figure 12This is a schematic diagram of the push structure of this utility model after the plastic part and the armature component are combined;

[0032] Figure 13 This is a three-dimensional structural diagram of the pushing structure of this utility model (including the armature component);

[0033] Figure 14 This is a side view of the pushing structure of this utility model (including the armature component);

[0034] Figure 15 This is a three-dimensional structural diagram of the relay of this utility model (showing a part);

[0035] Figure 16 yes Figure 15 Top view;

[0036] Figure 17 yes Figure 16 AA section view;

[0037] In the diagram, 1. Plastic part; 11. Base; 111. Second hollow hole; 12. Mounting structure; 121. Mounting part; 1211. Mounting groove; 122. Reinforcing part; 2. Pushing part; 21. Rod part; 22. Head; 221. Spherical surface; 3. Magnetic circuit part; 31. Armature part; 311. First hollow hole; 312. Through hole; 32. Coil frame; 33. Coil; 34. Yoke; 35. Iron core; 36. Restoring spring; 4. Moving spring part; 41. Moving spring; 411. Fixing part; 412. Deformation part; 413. Moving part; 4131. Elastic support; 4132. Forked groove; 414. Flexible spring; 5. Bridging plate; 51. Auxiliary lead-out end; 6. Stationary spring part; 61. Stationary spring; 62. Stationary contact; 7. Connecting rivet; 8. Base; 81. Limiting groove. Detailed Implementation

[0038] In this invention, the terms "first," "second," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "multiple" refers to two or more.

[0039] Please see Figures 1-5As shown, a movable spring component of this utility model can be used in electrical products such as relays and contactors. It includes a conductive bridge plate 5 and multiple movable spring components 4. The bridge plate 5 is elongated, and the multiple movable spring components 4 are arranged sequentially along the length of the bridge plate 5. The movable spring plates 41 of each movable spring component 4 are respectively connected to the bridge plate 5. In this embodiment, two movable spring components 4 are used as an example, but the number of movable spring components 4 is not limited to this. The movable spring plates 41 of each movable spring component 4 are forked to form multiple elastic support plates 4131 arranged side-by-side along the length of the bridge plate 5. Movable contacts 42 are provided at the same positions on each elastic support plate 4131, making the movable contacts 42 of each elastic support plate 4131 flush and on the same line. In this embodiment, the example is that movable contacts 42 are provided at the ends of each elastic support plate 4131, but this is not a limitation.

[0040] In a preferred embodiment, the movable spring 41 includes a fixed portion 411, a deformable portion 412, and a movable portion 413. The deformable portion 412 is bent, with both ends facing downwards and connecting to the fixed portion 411 and the movable portion 413 respectively. Specifically, the fixed portion 411, the deformable portion 412, and the movable portion 413 are integrally formed, and the deformable portion 412 is U-shaped or arc-shaped. The fixed portion 411 is connected to the bridge plate 5 and is located on the back side of the movable portion 413, and the length of the fixed portion is much shorter than the length of the movable portion 413. Specifically, the fixed portion 411 and the bridge plate 5 are riveted together by multiple connecting rivets 7, and the bridge plate 5 is located between the fixed portion 411 and the movable portion 413. The movable portion 413 forms the aforementioned multiple elastic support pieces 4131 through a fork, and the contact surface of the movable contact 42 is located on the front side of the movable portion 413. The forked groove 4132 formed between adjacent elastic support pieces 4131 extends from the tail end of the movable part 413 to the connection between the deformable part 412 and the movable part 413, making the forked groove 4132 elongated and improving the relative independence between each elastic support piece 4131. The moving contact 42 is fixed to the elastic support piece 4131 by riveting, which has advantages such as low contact resistance, low contact temperature rise, and low cost compared to welding contact points (welding contact points require a thicker silver layer; otherwise, the silver layer is easily deformed under pressure during welding, affecting contact, and the high silver consumption during welding leads to higher contact costs).

[0041] Furthermore, the movable part 413 is inclined towards the side closer to the fixed part 411 when the contact is broken. This design allows the movable part 413 to generate a certain pre-pressure, which helps to increase the contact breaking speed, enhance the action response, and ensure that the arc is extinguished quickly.

[0042] In a preferred embodiment, each movable spring component 4 has a movable spring sheet 41 formed by stacking multiple flexible spring sheets 414, and there is a gap between the deformable portions 412 of adjacent flexible spring sheets. This design can improve the overall flexibility of the movable spring sheet 41 while ensuring a high current carrying capacity.

[0043] In this invention, a movable spring component 41 features a design where the movable spring plate 41 is forked to form multiple elastic support plates 4131. This design allows each movable spring component 4 to achieve a multi-contact parallel design, reducing the contact resistance of the main circuit and thus minimizing heat generation. Furthermore, since multiple elastic support plates 4131 are formed from the same movable spring plate 41, this design not only simplifies the installation process but also effectively ensures the flatness of the multiple elastic support plates 4131, significantly improving the synchronicity of the movement of the movable contacts 42 on each elastic support plate 4131 (referring to the various elastic support plates 4131 located on the same movable spring plate 41). In addition, adjacent elastic support plates 4131 are separated from each other by forked slots, making the movement of each movable contact 42 relatively independent. This optimizes the ablation of individual contacts, thereby significantly improving the overall service life.

[0044] Please see Figures 1-17 As shown, a relay of this utility model includes a stationary spring portion and a moving spring portion as described above. The stationary spring portion includes a stationary spring component 6 corresponding to each moving spring component 4. Each stationary spring component 6 includes a stationary spring plate 61 and a plurality of stationary contacts 62 arranged in parallel on the stationary spring plate 61. The moving contacts 42 of each moving spring component 4 correspond one-to-one with the stationary contacts 62 of the corresponding stationary spring component 6. This utility model also includes a magnetic circuit portion 3 corresponding to each moving spring component 4. The armature component 31 of each magnetic circuit portion 3 pushes the elastic support plates 4131 of the corresponding moving spring component 4 through a pushing structure. A bridge plate 5 is connected to an auxiliary lead-out terminal 51, which can be used for monitoring signals.

[0045] In this embodiment, the actuating structure includes a plastic part 1 for cooperating with the armature component 31 and a actuating member 2 for cooperating with the moving spring 41. The actuating member 2 is connected to the plastic part 1. The plastic part 1 is made of thermoplastic plastic, while the actuating member 2 is made of a different material than the plastic part 1. The actuating member 2 can be made of one or more of thermosetting plastic, ceramic, and metal. In this embodiment, the actuating member 2 is made of metal (e.g., stainless steel), but is not limited to this. Therefore, the temperature resistance and wear resistance of the actuating member 2 are superior to those of the plastic part 1. This excellent wear resistance and temperature resistance completely avoids the deformation problem of thermoplastic plastic, significantly reduces the frictional loss between the actuating structure and the moving spring, ensures the long-term stability of the overtravel parameters, effectively eliminates the generation of plastic debris, and prevents early failure caused by plastic debris contaminating the contacts, thus greatly improving the mechanical life of the relay. The plastic part 1 of the actuating structure serves as a key isolation structure between the magnetic circuit part and the contact part. It not only reduces the cost of the actuating structure, but also effectively increases the creepage distance between the magnetic circuit part and the contact part through its excellent insulation performance, thus significantly improving the electrical safety performance of the relay.

[0046] The plastic part 1 specifically includes a base 11 for mating with the armature component 31 and a mounting structure 12 integrally formed on the base 11. The base 11 and the mounting structure 12 roughly form an L-shape, with the base 11 and the mounting structure 12 corresponding to the two sides of the L-shape, respectively. The base 11 and one side of the L-shaped armature component 31 are fixed together by insert injection molding. In this embodiment, the armature component 31 is specifically a single-unit structure, also referred to simply as the armature. One side of the armature component 31 is provided with a first hollow hole 311, which can adjust the center of the armature component 31 to its axis of rotation and reduce costs. In particular, the side of the armature component 31 used for insert injection molding is hollowed out, which can also increase its bonding strength with the injection-molded plastic. The plastic part 1 is made of high-temperature resistant plastic material. After it is injection molded with one side of the armature component 31, the base 11 of the plastic part 1 wraps around one side of the armature component 31, and a second hollow hole 111 is formed corresponding to the first hollow hole 311. In other embodiments, the armature component 31 is connected to the plastic component 1 by means of snap-fit ​​or plug-in, and the armature component 31 can be a single armature or a component structure, such as a combination of an armature and a plastic insulating component, or a combination of two armatures, a permanent magnet and a plastic insulating component.

[0047] Each pushing structure has multiple pushing members 2, and each pushing member 2 corresponds to a multiple elastic support piece 4131 of the corresponding moving spring 41. The above-mentioned mounting structure 12 includes multiple mounting parts 121 arranged in parallel, and the multiple pushing members 2 are connected to the multiple mounting parts 121 one by one. Each mounting part 121 is generally columnar (taking a cylindrical shape as an example) and extends along its pushing direction, and a reinforcing part 122 is provided between adjacent mounting parts 121 to improve the connection strength and overall stability of each mounting part 121.

[0048] Each mounting part 121 is provided with a mounting groove 1211. The pusher 2 is inserted into the corresponding mounting groove 1211 of the plastic part 1 in the opposite direction of its pushing direction, and is interference-fitted with the mounting groove 1211. This insertion and interference fit method makes the connection between the pusher 2 and the plastic part 1 relatively simple and quick, and it is easy to control the spatial position of the pusher 2 during the assembly process, so as to adjust the spatial position of the pusher 2 according to actual needs. However, the connection method between the pusher 2 and the plastic part 1 is not limited to this. In other embodiments, the pusher 2 and the plastic part 1 are connected by one or more of the following connection methods: insert injection molding, hot riveting, snap-fit ​​connection, and bonding.

[0049] In this embodiment, the pusher 2 is rivet-shaped, comprising an integrally formed head 22 and a rod 21. The diameter of the rod 21 is smaller than the diameter of the head 22. The rod 21 is inserted into the mounting groove 1211 and is interference-fitted with the mounting groove 1211. The side of the head 22 facing away from the rod 21 is used to contact and engage with the corresponding elastic support 4131, and is designed as a spherical surface 221. This allows the pusher 2 to make point contact with the elastic support 4131, resulting in lower frictional resistance and more sensitive action compared to planar contact. This avoids jamming problems and prevents material damage caused by long-term friction, improving contact reliability. Furthermore, the spherical surface 221 structure allows for a certain degree of self-adjustment, maintaining good contact even with minor assembly deviations. Moreover, the pusher 2 is a rivet, preferably a solid rivet, which significantly enhances the structural stability of the pusher 2.

[0050] The magnetic circuit section 3 includes, in addition to the armature component 31, a yoke 34, a coil frame 32, a coil 33 wound around the coil frame 32, an iron core 35 passing through the axial hole of the coil frame 32, and a restoring spring 36. The yoke 34 is L-shaped, with one side located at one end of the axial direction of the coil frame 32 and riveted to one end of the iron core 35. The other side is located outside the coil frame 32 and extends along the other end of the axial direction of the coil frame 32. The other side of the armature component 31 is oscillatingly positioned at the knife edge at the other end of the yoke 34 and magnetically engaged with the other end of the iron core 35. The restoring spring 36 is riveted to the yoke 34 and elastically presses against the armature component 31 to limit the armature component 31 and assist the armature component 31 in resetting in the opposite direction of the attraction direction. A through hole 312 is provided at the junction of the two sides of the armature component 31 to cooperate with the restoring spring 36.

[0051] This utility model also includes a base 8, in which two magnetic circuit parts 3 are arranged side by side along the length of the base 8, and the coil frame 32 of each magnetic circuit part 3 is vertical, that is, the axial direction of the coil frame 32 is in the vertical direction. The stationary spring plates 61 of the two stationary spring parts 6 are respectively inserted into the base 8, and the bridging plate 5 of the moving spring part extends along the length of the base 8, and the two ends of the bridging plate 5 are respectively inserted into the corresponding limiting grooves 81 provided in the base 8.

[0052] The working principle of the relay of this utility model is as follows:

[0053] When the coil 33 is energized, the magnetic circuit part 3 generates a magnetic field. The other side of the armature part 31 is attracted by the iron core 35 and rotates counterclockwise, driving each pusher 2 of the push structure to push the corresponding elastic support plate 4131, so that the moving contact 42 and the stationary contact 62 are closed.

[0054] When the coil 33 is de-energized, the magnetic field generated by the magnetic circuit part 3 disappears, and the armature part 31 rotates clockwise to reset under the reaction force of the restoring spring 36, so that each pusher 2 of the push structure releases the corresponding elastic support 4131. At the same time, each elastic support 4131 resets to the contact disconnection direction under the action of its own elastic restoring force, so that the moving contact 42 and the stationary contact 62 are quickly disconnected.

[0055] The present invention relates to a moving spring part and a relay. The parts not described herein are the same as or can be implemented using existing technology.

[0056] The above embodiments are only used to further illustrate a moving spring part and relay of the present utility model. However, the present utility model is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the technical solution of the present utility model.

Claims

1. A movable spring component, comprising a conductive bridge plate and a plurality of movable spring parts, each movable spring part comprising a movable spring leaf and a movable contact, the plurality of movable spring parts being arranged sequentially along the length direction of the bridge plate, and the movable spring leaf of each movable spring part being connected to the bridge plate; characterized in that: Each moving spring component has a moving spring sheet forming multiple elastic support sheets arranged in parallel along the length direction of the bridge plate through a fork, and each elastic support sheet is provided with the moving contact.

2. The movable spring portion according to claim 1, characterized in that: The movable spring includes a fixed part, a deformable part, and a movable part. The deformable part is bent, and its two ends are respectively connected to the fixed part and the movable part. The fixed part is connected to the bridge plate and is located on the back side of the movable part. The movable part forms a plurality of elastic support pieces by forking. The movable contact is provided at the same position of the plurality of elastic support pieces, and the contact surface of the movable contact is located on the front side of the movable part.

3. The movable spring portion according to claim 2, characterized in that: The forked groove formed between adjacent elastic support plates extends from the tail end of the movable part to the connection between the deformable part and the movable part; the moving contact is respectively provided at the end position of each elastic support plate.

4. The movable spring portion according to claim 2, characterized in that: The movable part is tilted towards the side closer to the fixed part when the contact is broken.

5. The movable spring portion according to claim 2, characterized in that: The fixing part is riveted to the bridging plate, and the bridging plate is located between the fixing part and the movable part.

6. The movable spring portion according to claim 2, characterized in that: The movable spring is composed of multiple flexible springs stacked together, and there is a gap between the deformed parts of adjacent flexible springs.

7. The movable spring portion according to claim 2, characterized in that: The fixed part, the deformable part, and the movable part are integrally formed, and the deformable part is U-shaped or arc-shaped.

8. The movable spring portion according to claim 2, characterized in that: The moving spring component is provided in two parts.

9. A relay, comprising a stationary spring portion, characterized in that: It also includes a moving spring portion as described in any one of claims 1-7, wherein the stationary spring portion includes a stationary spring component respectively provided for each moving spring component, each stationary spring component includes a stationary spring sheet and a plurality of stationary contacts arranged in parallel on the stationary spring sheet, and the moving contact of each moving spring component corresponds to and engages with the stationary contact of the corresponding stationary spring component.

10. The relay according to claim 9, characterized in that: It also includes a magnetic circuit section that is set for each moving spring component, and the armature component of each magnetic circuit section pushes the elastic support plate of the corresponding moving spring component through the push structure.

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