A large load static spring structure for a subminiature push rod type electromagnetic relay

Abstract

The application discloses a large-load static spring structure for a super-small push rod type electromagnetic relay, which mainly comprises a static spring assembly and a shunt plate. In the application structure of the electromagnetic relay, the shunt plate is arranged on the side of the static spring assembly which is opposite to a dynamic spring assembly, the current collecting end of the shunt plate is electrically connected with the static spring assembly, the static spring assembly forms a gap cooperation with the current leading end of the shunt plate before the overstroke state of the contact, and the static spring assembly forms a contact cooperation with the current leading end of the shunt plate in the overstroke state of the contact. The shunt plate which can form a specific cooperation relationship with the static spring assembly is added on the basis of the static spring assembly. The shunt plate does not affect the elastic deformability of the static spring assembly, the static spring plate of the static spring assembly has good elastic deformability, and the static spring assembly forms a current carrying and heat dissipating structure in the overstroke process of the contact, so that the current carrying and heat dissipating area of the static spring is effectively increased, and the current load capacity is reliably improved.

Description

Technical Field

[0001] This invention relates to the composition and structure of an electromagnetic relay, specifically a large-load static spring structure for an ultra-miniature push rod type electromagnetic relay. Background Technology

[0002] Common push-rod electromagnetic relay structures include Figure 1 As shown, it mainly consists of a base 3 and a static spring assembly 1 arranged directly or indirectly on the base 3. ， It consists of a moving spring assembly 4, a pusher 5, a yoke 6, an armature 7, an iron core 8, and a coil, etc. Its working principle is: - When current is applied to both ends of the coil lead, the excitation current of the coil will generate magnetic flux. The magnetic flux forms a magnetic circuit through the iron core 8, armature 7, yoke 6 and working air gap, and generates electromagnetic attraction in the working air gap. - When the excitation current rises to a certain set value, the electromagnetic attraction torque will overcome the counter torque of the moving spring assembly 4, causing the armature 7 to rotate, which will drive the push card 5 to push the moving spring assembly 4, so that the moving contact and the normally open stationary contact are closed, and the load is connected. At this time, the current will pass through the moving spring and the stationary spring. When the excitation current decreases to the set value, the reaction torque of the moving spring assembly 4 is greater than the electromagnetic attraction torque, the armature 7 returns to the initial state, the moving contact disconnects from the normally open stationary contact, and the load is disconnected.

[0003] There is a technical contradiction in the structural design of the aforementioned push-rod electromagnetic relay.

[0004] Specifically, in order to ensure the service life of push rod electromagnetic relays, it is necessary to design a large contact overtravel (i.e., the distance that the moving contact can continue to move forward after just contacting the stationary contact). The contact overtravel largely depends on the magnetic circuit attraction and the elastic deformability of the springs in the moving and stationary spring assemblies. Apart from the magnetic circuit attraction, springs with good elastic deformability are beneficial for the design of a larger contact overtravel.

[0005] To improve current-carrying capacity, the reed needs to be thickened and / or widened to increase the current-carrying area and ensure heat dissipation under increased load. However, thickening and / or widening the reed will inevitably affect its elastic deformability.

[0006] For push-rod electromagnetic relays with lower structural volume requirements, the aforementioned technical contradiction is easily resolved. The problem of reduced elastic deformability caused by increasing the current-carrying area of ​​the reed can be reliably solved by increasing the attractive force resulting from increasing the volume of the magnetically conductive structure such as the coil, thus ensuring contact overtravel. However, for ultra-miniature push-rod electromagnetic relays with a load current ≤10A, the technical measures to increase the attractive force cannot be applied due to structural volume limitations. In other words, in the design of ultra-miniature push-rod electromagnetic relays, the magnetic circuit attractive force remains essentially constant. Under this premise, the technical contradiction between increasing the current-carrying capacity and increasing the contact overtravel is particularly prominent. This is because, with the magnetic circuit attractive force remaining essentially constant, after thickening the reed, the magnetic circuit attractive force cannot push the reed to achieve the designed elastic deformation, resulting in a smaller contact overtravel and affecting the electrical durability of the electromagnetic relay.

[0007] Chinese patent literature discloses a technology entitled "An Electromagnetic Relay" (Publication No. CN 2899080, Publication Date May 9, 2007), which specifically discloses a method of setting a shunt plate on one side of a moving spring to improve current carrying capacity. The moving spring and the shunt plate basically form a layered arrangement structure, and an arc-shaped pre-bent protrusion is formed in the area of ​​the shunt plate corresponding to the elastic bending of the moving spring to reduce the influence of the shunt plate on the elastic deformation of the moving spring. The technical problem with this technology is: - While the moving spring structure can improve the current carrying capacity, the improvement of its current carrying capacity requires the assistance of increasing the current carrying area of ​​the stationary spring. Otherwise, the heat dissipation will be insufficient due to the small current carrying area on one side of the stationary spring, and the technical purpose of improving the load capacity will not be achieved. The increase of the current carrying area of ​​the stationary spring will result in a decrease in elastic deformation performance, which will affect the design of the contact overtravel. - The layered arrangement of dynamic springs can improve current carrying capacity, but the heat dissipation space between the shunt plate and the stationary spring plate is limited, so the improvement in current carrying capacity is relatively limited. - The layered arrangement of the moving spring structure, although the arc-shaped pre-bent protrusion can reduce the influence of the diverter plate on the elastic deformation of the moving spring plate to a certain extent, still has a significant impact on the elastic deformation capability of the moving spring plate, especially when the diverter plate and the moving spring plate are made of different materials, thus affecting the contact overtravel. - The layered arrangement of the moving spring structure has a complex forming structure for the flow divider plate, and the matching technology between the flow divider plate and the moving spring plate is difficult, making it difficult to miniaturize.

[0008] For a long time, in the structural design of ultra-miniature push rod electromagnetic relays, how to ensure good contact overtravel (i.e., the spring has good elastic deformation performance), improve current carrying capacity (i.e., the spring has a large current carrying and heat dissipation area), and facilitate molding, while keeping the magnetic attraction force unchanged, has been a problem that has plagued the industry, and no effective solution has emerged. Summary of the Invention

[0009] The technical objective of this invention is to address the unique characteristics of the aforementioned ultra-miniature push rod electromagnetic relay and the shortcomings of existing technologies by providing a static spring structure that is simple in structure, easy to mold, has good elastic deformability, and also has a large current-carrying and heat dissipation area, suitable for ultra-miniature push rod electromagnetic relays, while maintaining the magnetic circuit attraction force unchanged.

[0010] The technical objective of this invention is achieved through the following technical solution: a large-load static spring structure for an ultra-miniature push-rod electromagnetic relay, the static spring structure mainly consisting of a static spring assembly and a shunt plate. In the application structure of the electromagnetic relay, the shunt plate is arranged on the side of the static spring assembly opposite to the moving spring assembly. The current-collecting end of the shunt plate is electrically connected to the static spring assembly. Before the contact overtravel state, the static spring assembly forms a clearance fit with the current-leading end of the shunt plate. During the contact overtravel state, the static spring assembly forms a contact fit with the current-leading end of the shunt plate.

[0011] This technical measure addresses the unique characteristics of ultra-miniature push-rod electromagnetic relays. While maintaining the magnetic attraction force, it eliminates the consideration of the moving spring assembly and adds a shunt plate to the stationary spring assembly, enabling a specific fit. Firstly, the fit between the shunt plate and the stationary spring is simple and easy to mold, facilitating miniaturization and meeting the technical requirements of ultra-miniature electromagnetic relays. Secondly, the gap fit structure between the shunt plate and the stationary spring does not affect the elastic deformability of the stationary spring assembly, ensuring good elastic deformability of the stationary spring. Simultaneously, it assists the stationary spring assembly in forming a current-carrying and heat-dissipating structure during contact overtravel, effectively increasing the current-carrying and heat-dissipating area of ​​the stationary spring and reliably improving current load capacity. Thus, the ultra-miniature push-rod electromagnetic relay using this stationary spring structure can simultaneously achieve the following contact overtravel and current-carrying performance while maintaining the magnetic attraction force: - The excellent elastic deformability of the stationary spring in the stationary spring assembly allows for a larger contact overtravel. It's important to note that this contact overtravel also requires the matching elastic deformability of the moving spring in the moving spring assembly. Even with the moving spring's inherent elastic deformability unchanged, improving the stationary spring's elastic deformability can effectively reduce its hindering effect on the moving spring's elastic deformability, thus increasing the moving spring's elastic deformability during its interaction with the stationary spring. If the moving spring's elastic deformability remains essentially unchanged during its interaction with the stationary spring, its current-carrying and heat-dissipating area can be effectively increased. With a stationary spring structure boasting a large current-carrying and heat-dissipating area, the current load capacity is significantly improved. - By increasing the current-carrying and heat-dissipating area of ​​the stationary spring with the help of the shunt plate, the temperature on the moving spring side can be quickly and effectively conducted and dissipated to the stationary spring side, which can effectively improve the current-carrying capacity.

[0012] Furthermore, compared to the technology with publication number CN 2899080: - The improvement of current carrying capacity does not require the assistance of increasing the current carrying area of ​​the moving spring; - The gap fit structure between the shunt plate and the stationary spring plate has good heat dissipation performance, which helps to reliably improve the current carrying capacity; - The clearance fit structure between the flow divider and the stationary spring effectively avoids the influence of the flow divider on the elastic deformation capability of the stationary spring; - The flow divider has a simple molding structure, and the gap fit between it and the stationary spring is conducive to assembly and molding, as well as miniaturization.

[0013] As one preferred embodiment, the area of ​​the stationary spring assembly that serves as the contact point of the current-carrying end of the shunt plate during the contact overtravel state is a protruding structure convex towards one side of the shunt plate; or, the current-carrying end of the shunt plate has a protruding structure convex towards the stationary spring assembly, and the stationary spring assembly contacts the protruding structure of the current-carrying end of the shunt plate during the contact overtravel state. This technical measure effectively avoids the impact on the elastic deformability of the stationary spring plate when the shunt plate and the stationary spring plate are too close together, thus ensuring the elastic deformability of the stationary spring plate. It also creates a larger heat dissipation space between the stationary spring plate and the shunt plate, improving the heat dissipation capacity of both the stationary spring plate and the shunt plate. Furthermore, the protruding structure ensures reliable contact between the stationary spring plate and the shunt plate during the contact overtravel process, achieving reliable current conduction. Additionally, the extension of the protruding structure reduces the contact overtravel of the stationary spring plate when contacting the shunt plate, thus reducing the elastic deformation of the stationary spring plate during the contact overtravel process, which is beneficial for increasing the thickness of the stationary spring plate and improving the current-carrying capacity.

[0014] As one preferred embodiment, the area of ​​the stationary spring assembly used to contact the flow-guiding end of the diverter in the contact overtravel state is a protruding structure convex outward toward one side of the diverter. Correspondingly, the flow-guiding end of the diverter has a protruding structure convex outward toward the stationary spring assembly. In the contact overtravel state, the stationary spring assembly contacts the protruding structure of the flow-guiding end of the diverter through the protruding structure on one side of itself. This technical measure, through the cooperation of the protruding structures on both sides, effectively increases the non-contact area clearance between the shunt plate and the stationary spring, reliably ensuring the elastic deformability of the stationary spring. It also effectively increases the heat dissipation space between the stationary spring and the shunt plate, improving their heat dissipation capacity. Furthermore, the protruding structures on both sides ensure reliable contact between the stationary spring and the shunt plate during contact overtravel, achieving reliable current conduction. Additionally, the extension of the protruding structures on both sides reduces the contact overtravel of the stationary spring when contacting the shunt plate, i.e., reduces the elastic deformation of the stationary spring during contact overtravel, which is beneficial for increasing the thickness of the stationary spring and improving its current carrying capacity.

[0015] Furthermore, the protruding structure is formed along the width direction of the stationary spring / diverter plate of the stationary spring assembly. This technical measure effectively ensures stable and reliable contact between the stationary spring and the diverter plate during contact overtravel, and ensures a large contact surface, thereby enhancing conductivity.

[0016] As a preferred embodiment, the stationary spring assembly has at least a mounting portion for assembly on the base of the electromagnetic relay and a contact portion for connecting the stationary contact. An elastically deformable augmentation structure is provided on the stationary spring between the mounting portion and the contact portion. The area between the upper edge of the elastically deformable augmentation structure and the contact portion is used to form a contact engagement with the current-carrying end of the shunt plate during contact overtravel. This technical measure reliably enhances the elastic deformability and current-carrying capacity of the stationary spring. Specifically, it effectively increases the current-carrying and heat-dissipating area of ​​the stationary spring while maintaining a substantially unchanged elastic deformability. Therefore, the good elastic deformability of the stationary spring provides the fundamental conditions for increasing its current-carrying and heat-dissipating area.

[0017] Furthermore, the current-distributing end of the current-distributing plate is electrically connected to the mounting portion of the stationary spring via a contact fit structure. Even further, the current-distributing end of the current-distributing plate is electrically connected to the mounting portion of the stationary spring via a surface contact fit structure. This technical measure not only enables a stable and reliable electrical connection between the stationary spring and the current-distributing plate, but also facilitates automated assembly between the current-distributing plate and the stationary spring, reducing manufacturing costs, and effectively avoids the impact of other electrical connection states on the elastic deformability of the stationary spring.

[0018] Furthermore, the stationary spring between the mounting portion and the contact portion engages with the adjacent shunt plate in a parallel structure before the contact overtravel state. This technical measure effectively avoids the influence of the shunt plate on the elastic deformability of the stationary spring, and reliably forms a large heat dissipation space between the stationary spring and the shunt plate, improving the heat dissipation capacity of both the stationary spring and the shunt plate, and reliably realizing current conduction.

[0019] Furthermore, the elastically deformable enhancement structure is a hole-shaped structure or a groove-shaped structure formed on the stationary spring sheet between the mounting portion and the contact portion. The hole-shaped structure is a through-hole structure in the thickness direction of the stationary spring sheet, and the groove-shaped structure is an inwardly recessed structure on one or both sides in the width direction of the stationary spring sheet. This technical measure has a simple structure, is easy to form, and can effectively ensure the elastically deformable performance of the stationary spring sheet.

[0020] As a preferred embodiment, the gap distance between the stationary spring assembly and the current-leading end of the shunt plate before the contact overtravel state is 3 / 4 to 1 times the contact overtravel. This technical measure effectively avoids the influence of the shunt plate on the elastic deformability of the stationary spring, and effectively ensures reliable contact between the stationary spring and the shunt plate during the contact overtravel state, thus realizing current conduction.

[0021] The beneficial technical effects of the present invention are as follows: The above technical measures are designed for the special characteristics of ultra-small push rod electromagnetic relays. Under the premise of keeping the magnetic circuit attraction force unchanged, the moving spring assembly is not considered. On the basis of the stationary spring assembly, a shunt plate that can form a specific cooperation relationship with the stationary spring assembly is added. On the one hand, the cooperation structure between the shunt plate and the stationary spring plate is simple and easy to form, which is conducive to miniaturization and meets the design technical requirements of ultra-small electromagnetic relays. Secondly, the clearance fit between the shunt plate and the stationary spring, especially the clearance fit formed by the protrusions on the stationary spring and / or the shunt plate, does not affect the elastic deformability of the stationary spring assembly, giving the stationary spring good elastic deformability. Simultaneously, during contact overtravel, it assists the stationary spring assembly in forming a current-carrying and heat-dissipating structure, thereby effectively increasing the current-carrying and heat-dissipating area of ​​the stationary spring, reliably improving the current load capacity, and reliably solving a long-standing technical problem in the industry. Specifically: - The protruding structure between the stationary spring and the diverter plate effectively avoids the impact of the close fit between the diverter plate and the stationary spring on the elastic deformability of the stationary spring, thus ensuring the elastic deformability of the stationary spring. - The protruding structure between the stationary spring and the shunt plate creates a large heat dissipation space, reliably improving the heat dissipation capacity of both the stationary spring and the shunt plate; - The protruding structure between the stationary spring and the shunt plate ensures stable contact during contact overtravel, thus enabling reliable current conduction. - The contact overtravel of the stationary spring and the shunt plate is reduced by the extension of the protrusion structure. This reduces the elastic deformation of the stationary spring during the contact overtravel process, which helps to increase the thickness of the stationary spring and improve its current carrying capacity. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an existing push-rod type electromagnetic relay.

[0023] Figure 2 This is a schematic diagram of one structure of the present invention.

[0024] Figure 3 for Figure 2 A schematic diagram of the static spring assembly structure.

[0025] Figure 4 This is a reference diagram showing the usage state of the present invention.

[0026] Figure 5 for Figure 4 A magnified view of a portion of the image.

[0027] Figure 6 for Figure 4 The diagram shows the working principle under usage conditions.

[0028] Figure 7 This is another structural schematic diagram of the present invention.

[0029] Figure 8 This is another structural schematic diagram of the present invention.

[0030] The symbols in the diagram mean: 1, 1 ， 11—Stationary spring assembly; 12—Pin part; 13—Mounting part; 14—Elastically deformable augmentation structure; 15—Protruding structure; 16—Contact part; 2—Stationary contact; 21—Diverter; 22—Buffer; 3—Base; 4—Moving spring assembly; 5—Pushing clip; 6—Yoke; 7—Armature; 8—Core; I, I1, I2—Current. Detailed Implementation

[0031] This invention relates to the structural composition of electromagnetic relays, specifically a large-load static spring structure for an ultra-miniature push-rod type electromagnetic relay with a load current ≤10A. The main technical content of this invention is described in detail below with several embodiments. Embodiment 1 is illustrated in conjunction with the accompanying drawings—that is… Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The technical solution of the present invention will be clearly and thoroughly explained; Embodiment 5 is illustrated in conjunction with the accompanying drawings. Figure 7 The technical solution of the present invention will be clearly and thoroughly explained; Embodiment 6 is illustrated in conjunction with the accompanying drawings. Figure 8 The technical solution of the present invention is clearly and in detail explained; although other embodiments are not shown in separate drawings, their main structure can still be referred to the drawings of Embodiment 1.

[0032] It should be noted that the accompanying drawings of this invention are schematic, and unnecessary details have been simplified in order to clarify the technical objectives of this invention, so as to avoid obscuring the technical solutions contributed by this invention to the prior art.

[0033] Example 1 See Figure 2 and Figure 3 As shown, the stationary spring structure of the present invention mainly consists of a stationary spring assembly 1 and a flow divider 2.

[0034] Specifically, the stationary spring assembly 1 has a stationary spring sheet and a stationary contact 16.

[0035] The stationary spring 1 is a thin sheet structure, having a lead portion 11 at the bottom, a mounting portion 12 at the lower middle, and a contact portion 15 at the top. The lead portion 11 on the stationary spring 1 serves as a conductive connection. The mounting portion 12 on the stationary spring 1 serves to mount and fix the stationary spring 15 on the base. The contact portion 15 on the stationary spring 1 serves to connect to the stationary contact 16, with the contact side of the stationary contact 16 facing the moving spring assembly.

[0036] To increase the current-carrying and heat dissipation area of ​​the aforementioned stationary spring, the thickness of the stationary spring can be increased according to the design requirements. However, the elastic deformability of the stationary spring will decrease after the thickness is increased. To improve the elastic deformability of the stationary spring, an elastic deformability enhancement structure 13 with a hole-shaped structure is provided vertically in the area between the mounting part 12 and the contact part 15 of the stationary spring. This elastic deformability enhancement structure 13 is a through-hole structure in the thickness direction of the stationary spring. The lower edge of the elastic deformability enhancement structure 13 is at the top of the mounting part 12, and the upper edge is below the contact part 15.

[0037] The diverter plate 2 has a thin sheet structure. The width of the diverter plate 2 is basically corresponding to the width of the stationary spring between the mounting part 12 and the contact part 15.

[0038] The flow divider 2 has a flow inlet 21 at the top and a flow inlet 22 at the bottom. The flow inlet 22 of the flow divider 2 is bent at the bottom of the flow divider 2, that is, the flow inlet 21 and the flow inlet 22 of the flow divider 2 form two basically parallel opposing planes through the bending structure at the bottom.

[0039] The diverter 2 is arranged on the side of the stationary spring assembly 1 opposite to the moving spring assembly, that is, on the side opposite to the contact side of the stationary contact 16. The confluence end 22 of the diverter 2 is directly connected to the mounting portion 12 of the stationary spring with a planar contact fit structure, so that the confluence end 22 and the mounting portion 12 of the stationary spring are electrically connected together. The guide end 21 of the diverter 2 extends upward through a bottom bending structure, which basically corresponds to the mounting portion 12, at least to the lower edge of the elastically deformable augmentation structure 13. The area of ​​the diverter 2 in the plane where the guide end 21 is located is basically parallel to the stationary spring side between the mounting portion 12 and the contact portion 15, forming a clearance fit with the stationary spring at that location.

[0040] The upward-extending flow-guiding end 21 of the flow divider 2 corresponds to the area between the upper edge of the elastic deformable augmentation structure 13 on the stationary spring and the contact portion 15. That is, the area between the upper edge of the elastic deformable augmentation structure 13 on the stationary spring and the contact portion 15 is used as the flow-guiding end 21 that cooperates with the flow divider 2.

[0041] At the location where the stationary spring serves as the guide end 21 of the diverter 2, i.e., in the stationary spring region between the upper edge of the elastically deformable augmentation structure 13 and the contact portion 15, a protruding structure 14 is formed outwardly toward the diverter 2. This protruding structure 14 is formed along the width direction of the stationary spring, and the end of the diverter 2's guide end 21 extends upward slightly beyond the protruding structure 14.

[0042] A clearance fit is formed between the flow-guiding end 21 of the shunt plate 2 and the protruding structure 14 of the stationary spring plate. The clearance distance of this clearance fit is approximately 3 / 4 to 1 times the contact overtravel. For example, it is 3 / 4 times the contact overtravel, meaning that the contact makes contact with the shunt plate when the contact has traveled approximately 3 / 4 of the preset distance; or it is 1 times the contact overtravel, meaning that the contact makes contact with the shunt plate exactly when the contact has completed its overtravel. To ensure stability, the clearance distance of the clearance fit is preferably 3 / 4 times the contact overtravel.

[0043] See Figure 4 , Figure 5 and Figure 6 As shown, the ultra-miniature push rod electromagnetic relay using the above-mentioned static spring structure mainly consists of a base 3 and a static spring structure (i.e., the above-mentioned static spring assembly 1 and shunt plate 2) directly or indirectly arranged on the base 3, a moving spring assembly 4, a push card 5, a yoke 6, an armature 7, an iron core 8, and a coil.

[0044] In the application structure of the ultra-miniature push rod electromagnetic relay, the shunt plate 2 of the stationary spring structure is arranged on the side of the stationary spring assembly 1 opposite to the moving spring assembly 4. The current-collecting end 22 of the shunt plate 2 and the mounting part 12 of the stationary spring assembly 1 are mounted on the base 3 and directly connected together to form an electrical connection.

[0045] During the operation of the ultra-miniature push-rod electromagnetic relay, the stationary spring assembly 1 forms a clearance fit with the current-leading end 21 of the shunt plate 2 before the contact overtravel state, and does not make contact. In the later stage of the contact overtravel state, the stationary spring assembly 1 makes contact with the current-leading end 21 of the shunt plate 2; that is, the elastically deformed stationary spring forms contact with the current-leading end 21 of the shunt plate 2 through the protruding structure 14. In this way, the shunt plate 2 shares the current-carrying and heat-dissipating loads of the stationary spring. The specific working principle is as follows: Figure 6 As shown: - When the moving contact of the moving spring assembly 4 moves to contact the stationary contact of the stationary spring assembly 1, the current I on the moving spring assembly 4 is conducted to the stationary spring assembly 1. Based on the design of contact overtravel, the moving contact will continue to move after contacting the stationary contact, and will travel the contact overtravel. At this time, the stationary spring begins to bend and deform. Due to the existence of the elastic deformability increase structure 13 on the stationary spring, the reaction force of the stationary spring is reduced, and the contact overtravel distance can be completed smoothly. - When the contact overtravel is about to be completed, the protrusion 14 on the stationary spring contacts and engages with the current-leading end 21 of the current-shunting plate 2. At this time, the current I conducted from the stationary contact is divided into two paths: one current I1 flows through the stationary spring, and the other current I2 flows through the current-shunting plate 2. By shunting, the current on the stationary spring is reduced and the temperature rise is lowered, thereby achieving the technical effect of increasing the load and avoiding the limitation of the load caused by the excessive temperature rise caused by all current I flowing through the stationary spring.

[0046] Example 2 The other contents of this embodiment are the same as those of embodiment 1, except that: the elastic deformable added structure on the stationary spring is a groove-shaped structure. The groove-shaped structure refers to the concave structure on one or both sides in the width direction of the stationary spring, and the stationary spring forms a "|[" type structure or a "][" type structure.

[0047] Example 3 The other contents of this embodiment are the same as those of embodiment 1 or 2, except that: the elastic deformability of the stationary spring increases the flat structure between the upper edge of the structure and the contact part, without any protrusions.

[0048] Example 4 The other contents of this embodiment are the same as those of embodiments 1, 2 or 3, except that the thickness of the stationary spring is basically the same as that of the traditional stationary spring, except that a diverter structure is added separately to the side of the stationary spring.

[0049] Example 5 See Figure 7 As shown, the rest of the content of this embodiment is the same as that of embodiment 1, except that: -The stationary spring sheet of the stationary spring assembly 1 has a flat structure and no protrusions; - The flow-guiding end 21 of the flow divider 2 faces the side of the static spring assembly 1 and has an outwardly protruding protrusion structure 23; - When the contact overtravel state is reached, the bent and deformed stationary spring of the stationary spring assembly 1 comes into contact with the protruding structure 23 at the flow-guiding end 21 of the diverter 2.

[0050] Example 6 See Figure 8 As shown, the rest of the content of this embodiment is the same as that of embodiment 1, except that: - The flow-guiding end 21 of the flow divider 2 faces the side of the stationary spring assembly 1 and has an outwardly protruding protrusion structure 23, and the height of the protrusion structure 23 on one side of the flow divider 2 is basically consistent with the height of the protrusion structure 14 on the side of the stationary spring. - When the stationary spring assembly 1 is in the contact overtravel state, it contacts the protrusion 23 at the flow-guiding end 21 of the diverter 2 through the protrusion 14 on the stationary spring.

[0051] The above embodiments are only used to illustrate the present invention and are not intended to limit it.

[0052] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications can still be made to the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the present invention.

Claims

1. A high-load static spring structure for an ultra-miniature push-rod electromagnetic relay, characterized in that: The static spring structure is mainly composed of a static spring assembly (1) and a diverter plate (2). The diverter plate (2) is an elastic, deformable, and current-carrying thin sheet structure. The diverter plate (2) has a flow-guiding end (21) at the top and a flow-collecting end (22) at the bottom. In the application structure of the electromagnetic relay, the shunt plate (2) is arranged on the side of the stationary spring assembly (1) opposite to the moving spring assembly (4). The current-collecting end (22) of the shunt plate (2) is electrically connected to the stationary spring assembly (1). Before the contact overtravel state, the stationary spring assembly (1) forms a clearance fit with the current-leading end (21) of the shunt plate (2). During the contact overtravel state, the stationary spring assembly (1) forms a contact fit with the current-leading end (21) of the shunt plate (2).

2. The large-load static spring structure for the ultra-miniature push rod electromagnetic relay according to claim 1, characterized in that: - The area of ​​the static spring assembly (1) used to contact the flow guide end (21) of the flow divider (2) in the contact overtravel state is a protruding structure (14) that convexes outward toward the flow divider (2). Alternatively, the flow-guiding end (21) of the flow divider (2) has an outwardly convex protrusion structure (23) on the side facing the stationary spring assembly (1), and the stationary spring assembly (1) contacts the flow-guiding end protrusion structure (23) of the flow divider (2) in the contact overtravel state. Alternatively, the area of ​​the stationary spring assembly (1) used to contact the flow-leading end (21) of the diverter (2) in the contact overtravel state is a protruding structure (14) convexly formed towards one side of the diverter (2). Correspondingly, the flow-leading end (21) of the diverter (2) has a protruding structure (23) convexly formed towards the stationary spring assembly (1) on one side. In the contact overtravel state, the stationary spring assembly (1) contacts the flow-leading end protruding structure (23) of the diverter (2) through the protruding structure (14) on one side of itself.

3. The large-load static spring structure for the ultra-miniature push rod electromagnetic relay according to claim 2, characterized in that: The protruding structure is formed along the width direction of the stationary spring plate / diverter plate of the stationary spring assembly.

4. The large-load static spring structure for an ultra-miniature push-rod electromagnetic relay according to claim 1 or 2, characterized in that: The stationary spring assembly (1) has at least a mounting portion (12) for mounting on the base (3) of the electromagnetic relay, and a contact portion (15) for connecting the stationary contact (16). An elastically deformable augmentation structure (13) is provided on the stationary spring between the mounting portion (12) and the contact portion (15). The area between the upper edge of the elastically deformable augmentation structure (13) and the contact portion (15) is used to form a contact engagement with the flow-leading end (21) of the shunt plate (2) in the contact overtravel state.

5. The large-load static spring structure for the ultra-miniature push rod electromagnetic relay according to claim 4, characterized in that: The junction end (22) of the shunt plate (2) is electrically connected to the mounting part (12) of the stationary spring plate by a contact fit structure.

6. The large-load static spring structure for the ultra-miniature push rod electromagnetic relay according to claim 5, characterized in that: The junction end (22) of the shunt plate (2) is electrically connected to the mounting part (12) of the stationary spring plate by means of a surface contact fit structure.

7. The large-load static spring structure for the ultra-miniature push rod electromagnetic relay according to claim 4, characterized in that: The stationary spring between the mounting part (12) and the contact part (15) engages with the side diverter (2) in a parallel structure before the contact overtravel state.

8. The large-load static spring structure for the ultra-miniature push rod electromagnetic relay according to claim 4, characterized in that: The elastic deformable augmentation structure (13) is a hole-shaped structure or a groove-shaped structure formed on the stationary spring sheet between the mounting part (12) and the contact part (15). The hole-shaped structure is a through-hole structure in the thickness direction of the stationary spring sheet, and the groove-shaped structure is an inwardly recessed structure on one or both sides in the width direction of the stationary spring sheet.

9. The large-load static spring structure for the ultra-miniature push rod electromagnetic relay according to claim 1, characterized in that: Before the contact overtravel state, the gap distance between the static spring assembly (1) and the flow-leading end (21) of the diverter (2) is 3 / 4 to 1 times the contact overtravel.

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