Laminated movable contact spring and push rod type relay comprising same

Abstract

The invention relates to the technical field of relays, and particularly discloses a laminated movable contact spring and a push rod type relay comprising the same. Wherein a reed body of the movable reed comprises a plurality of reeds which are overlapped together, and a first reed is close to a magnetic circuit part in the relay structure; the first reed is provided with at least one group of concave structures for adjusting elasticity at the edges of the two sides in the width direction; the other reeds are provided with receding notches which are formed in an inward-concave mode, located on the inner sides of the corresponding inward-concave structures and staggered with the outlines of the corresponding inward-concave structures corresponding to the edge areas of the inward-concave structures on the first reed. Aiming at the particularity that a push rod type relay enables the movable contact spring to form a laminated structure in order to adapt to a high-current working condition environment, the structure stress concentration phenomenon of the movable contact spring at the edges of the two sides in the width direction is effectively improved, and the stress of the movable contact spring in thrust deformation is small; and the formed push rod type relay can basically maintain the original electromagnetic attraction design to realize high current-carrying performance.

Description

Technical Field

[0001] The invention relates to the technical field of relays, in particular to a stacked movable reed and a push rod type relay comprising the movable reed. Background Art

[0002] The push rod relay is mainly composed of a base and a magnetic circuit part and a contact part arranged on the base, which are connected by a push card to the left and right positions. The magnetic circuit part includes a coil frame arranged on the base, an iron core arranged inside the coil frame, a coil wound outside the coil frame, a yoke arranged beside the coil, an armature arranged on the yoke in a flippable structure, and a compression spring that applies spring force on the back of the armature. The contact part includes a dynamic spring assembly and a static spring assembly arranged on the base. Its working principle is roughly as follows: when current is applied to both ends of the lead-out pins of the coil, the excitation current of the coil will generate a magnetic field that meets the design requirements. The magnetic field forms a magnetic circuit through the working air gap between the iron core, the yoke and the armature, and generates electromagnetic attraction in the working air gap; when the excitation current rises to a certain value, the electromagnetic attraction torque will overcome the elastic reaction torque of the moving spring of the contact part, causing the armature to rotate, thereby driving the push card to push the moving spring of the contact part, thereby realizing the closing of the moving contact and the static contact of the contact part; when the excitation current decreases to a certain value, the elastic reaction torque of the moving spring of the contact part is greater than the electromagnetic attraction torque, the armature returns to the initial state, and the moving contact and the static contact of the contact part are disconnected.

[0003] In order to adapt to the technical requirements of high current working conditions, the push rod relay mentioned above will form the moving reed with a double-layer thin-sheet stacking structure under the guidance of the design logic of minimizing the increase in the electromagnetic attraction of the magnetic circuit part, so that the moving reed can achieve high current carrying and low temperature rise performance. At present, the forming of this kind of stacked moving reed is to stack two thin-sheet reeds with basically the same contour structure together in the thickness direction. For example, the Chinese patent document discloses a technology named "An Electromagnetic Relay", with a publication number of CN 214505389 U and a publication date of October 26, 2021. The moving reed formed by stacking two thin-sheet reeds with basically the same contour structure has the following main technical problems during use: First, since there will inevitably be an elastic adjustment concave structure design including a push card perforation hole at the edges of both sides of the moving spring in the width direction, the concave structure of the edge of the two thin-sheet springs with basically the same contour structure tends to be straight; and since the concave structure of the edge is a concentrated distribution area of ​​structural stress during bending deformation, the edge structural stress of the two springs is in a concentrated distribution state, which is prone to plastic deformation or even fracture during repeated elastic deformation; Secondly, due to the overlapping structure of two thin-sheet springs with basically the same contour structure, the structural rigidity of the formed moving spring is increased, which places high technical requirements on the thrust, and the rebound reaction force generated by the elastic release is large. This requires the push rod relay using the moving spring to have a larger electromagnetic suction force and contact part arrangement space, that is, it is necessary to upgrade the design structure of the push rod relay.

[0004] In the prior art, there are also technologies that differentiate the width direction of the two springs that make up the stacked moving spring. For example, the Chinese patent document disclosed the name "A small electromagnetic relay", the publication number is CN213150682 U, and the publication date is May 7, 2021. This technology stacks two thin-sheet springs with different widths together to form a moving spring, so that the edge of the spring facing the static spring side (i.e., the static spring side spring) is located inside the edge of the spring facing the magnetic circuit side (i.e., the magnetic circuit side spring). This differentiated stacking structure has a certain effect on improving the structural stress concentration at the edges on both sides of the moving spring in the width direction. However, since the edge of the static spring side spring piece in the technology is a straight-edge structure in the width direction, it cannot cooperate with the edge of the magnetic circuit side spring piece in the width direction. Therefore, on the one hand, it is impossible to reliably disperse the structural stress distribution of the concave structure of the edge of the magnetic circuit side spring piece; on the other hand, it is not conducive to optimizing the elastic deformation performance of the magnetic circuit side spring piece, so that the structural rigidity of the formed moving spring piece is relatively large, and a larger electromagnetic suction force is required to generate thrust. The rebound reaction force generated by the elastic release is also large, which is not conducive to the compact structure and miniaturization of push rod type relays of the same specifications. Summary of the invention

[0005] The technical purpose of the present invention is to provide a stacked movable spring piece that can reliably improve the structural stress concentration phenomenon at the edges on both sides in the width direction and optimize the elastic deformation performance, and a push rod relay including the movable spring piece in order to adapt to the particularity of the above-mentioned push rod type relay in the high current working environment and the shortcomings of the prior art.

[0006] The technical purpose of the present invention is achieved by the following technical solution: a stacked dynamic reed, comprising a reed body; The reed body comprises a plurality of reeds stacked together in the thickness direction; In the relay structure, the reeds of the reed body are arranged in order from near to far relative to the magnetic circuit part, and the reed closer to the magnetic circuit part is the first reed; The first reed has at least one group of concave structures at both side edges in the width direction for adjusting the elasticity of the first reed; The remaining reeds in the reed body except the first reed have, corresponding to the edge area of ​​the concave structure on the first reed, a concave-shaped clearance notch located on the inner side of the corresponding concave structure and staggered from the contour of the corresponding concave structure.

[0007] The above technical measures are aimed at the particularity that the movable reed forms a stacked structure in order to adapt to the high current working environment of the above push rod type relay. The edges on both sides of the width direction of the other reeds (note that the "other reeds", "the remaining reeds", "the other reeds" or "the remaining reeds" refer to the reeds other than the first reed close to the magnetic circuit part except for explicit reference) are staggered from the inside with the corresponding concave structure on the first reed close to the magnetic circuit part in the form of a clearance gap structure, so that the edge clearance gaps of the other reeds disperse the structural stress distribution at the corresponding concave structure of the first reed, and the edge concave structure of the first reed disperses the structural stress distribution at the corresponding clearance gaps of the other reeds. The two form a synergistic cooperation at the edges in the width direction, which has a significant effect on improving the structural stress concentration phenomenon at the edges on both sides in the width direction. After repeated tests, this synergistic cooperation structure basically does not cause the movable reed to undergo plastic deformation or even fracture during repeated elastic deformation. Moreover, since the other stacked springs and the first spring form a differentiated width fit at the elastically adjusted concave structure, the deformation of the first spring under the thrust is easy to achieve, which can effectively reduce the technical requirements for the thrust generated by the electromagnetic suction force, and can also effectively optimize the rebound reaction force of the entire moving spring when the elastic force is released through the other springs, avoiding excessive rebound reaction force of the moving spring. Therefore, the above technical measures are conducive to reducing the technical requirements for electromagnetic suction while improving the stress concentration phenomenon of the moving spring structure, and thus are conducive to the compact structure and miniaturization of the push rod type relay using the moving spring.

[0008] As one of the preferred technical solutions, the concave structures at the edges of both sides of the first spring in the width direction are push card through holes formed at one edge of the push section of the first spring, and the push card through holes on each side are C-shaped profile structures opening outward; Correspondingly, the edge of the pushing section of each of the other spring sheets has a concave-shaped clearance gap 1 that is staggered from the corresponding pushing card through hole, and the contour edge of the clearance gap 1 forms a spacing match with the contour edge of the corresponding pushing card through hole.

[0009] Furthermore, the clearance gap is a flat-bottomed concave structure, having corners located on the top and bottom sides of the concave flat bottom in the height direction, and the two corners are located on the inner sides of the top and bottom sides of the corresponding push card perforation in the height direction.

[0010] The above technical measures are aimed at the particularity of the inevitable design of the structure of the first spring leaf forming the push card through hole at the push section. On the one hand, the width of the other spring leaves is made smaller than the width of the first spring leaf, forming a special-shaped overlap of multiple spring leaves, thereby reducing the requirement for the thrust generated by the electromagnetic attraction, and the rebound reaction force of the entire dynamic spring leaf when the elastic force is released can be effectively optimized through the other spring leaves; on the other hand, the other spring leaves are used to cooperate with the push card through hole at the edge of the first spring leaf, forming a staggered fit of the give way gap, thereby effectively reducing the requirement for the thrust of the dynamic spring leaf with a multi-laminate structure, and effectively avoiding the dynamic spring leaf from deforming under thrust, so that the distribution of the structural stress of the first spring leaf and other spring leaves at the push card through hole is concentrated, which greatly reduces the risk of plastic deformation or even fracture of the dynamic spring leaf at the push card through hole during thrust deformation.

[0011] As one of the preferred technical solutions, the concave structures at the edges on both sides of the width direction of the first spring are elastic adjustment steps formed at one edge of the pin section of the first spring, and the elastic adjustment step on each side is a step structure located above the pin connection position, with a wide bottom side and a narrow top side; Correspondingly, the edge of the pin section of each of the other spring sheets has a second recessed notch that is staggered from the corresponding elastic adjustment step, and the contour edge of the second recess is spaced to match the contour edge of the corresponding elastic adjustment step.

[0012] Furthermore, the second clearance gap is a flat-bottomed concave structure, having two edges and corners located on the top and bottom sides of the concave flat bottom in the height direction, and these two edges and corners are located on the inner sides of the top and bottom sides of the corresponding elastic adjustment step in the height direction.

[0013] The above technical measures are based on the design logic of minimizing the increase of the electromagnetic attraction of the magnetic circuit part, and form a step structure at the pin section of the first spring that can enhance the elastic deformation ability of the first spring. In view of the particularity of the design structure, on the one hand, the width of the other springs is smaller than the width of the first spring, forming a special-shaped overlap of multiple springs, thereby reducing the requirements for the thrust generated by the electromagnetic attraction, and the rebound reaction force of the entire dynamic spring when the elastic force is released can be effectively optimized through the other springs; on the other hand, the other springs are used as the parts of the elastic adjustment steps of the edge of the first spring to form a staggered fit of the gap, so that the requirements for the thrust of the dynamic spring of the multi-laminated structure can be effectively reduced, and the dynamic spring can be effectively prevented from deforming under thrust, so that the distribution of the structural stress of the first spring and other springs at the elastic adjustment step is centralized, which greatly reduces the risk of plastic deformation or even fracture of the dynamic spring at the elastic adjustment step during thrust deformation.

[0014] As one of the preferred technical solutions, the width of the remaining reeds except the first reed at least at the push section and at the pin section is smaller than the width of the first reed at the corresponding position.

[0015] This technical measure enables the other reeds to overlap with the first reed in a special shape in the width direction, thereby reducing the technical requirements for the thrust generated by the electromagnetic attraction, and also effectively optimizing the rebound reaction force of the entire dynamic reed when the elastic force is released through the other reeds.

[0016] As one of the preferred technical solutions, an elastic adjustment hole is provided on the pin section of the first reed at the top side of the pin connection position in the height direction and at the center of the width direction; And / or, an elastic adjustment hole two are provided at the middle of the pushing hole of the pushing card in the width direction, on the first pushing section of the first reed.

[0017] The above technical measures can reduce the elastic force of the first spring after elastic release through stress distribution in different parts, so as to restrain the rebound reaction force of the movable spring when the elastic force is released, and effectively reduce the risk of arcing and secondary conduction.

[0018] As one of the preferred technical solutions, in the overlapping structure of the reed body, there is an elastic gap between the two reeds arranged adjacently in a triangular structure between the pin section and the push section; Moreover, between the two adjacently arranged spring leaves, the spring leaf close to the normally open static spring assembly forms a bottom edge of the elastic gap, and the spring leaf close to the magnetic circuit portion forms two waist edges of the elastic gap, and the length of the bottom edge is respectively greater than the length of the two waist edges.

[0019] The above technical measures are based on the particularity that the above-mentioned multiple spring leaves are overlapped together in the thickness direction, and an elastic gap with an approximately triangular structure is formed between the two layers of spring leaves arranged in adjacent positions, so as to improve the bending deformation performance of the spring leaves close to the normally open static spring assembly (the following expressions about "the spring leaves close to the magnetic circuit part" and "the spring leaves close to the normally open static spring assembly", unless otherwise specified, refer to the relative position between the two spring leaves arranged in adjacent positions) under the action of thrust, and effectively reduce the structural stress of the spring leaves close to the normally open static spring assembly during thrust deformation, so that the formed push rod relay can basically maintain the original electromagnetic attraction design to achieve high current carrying performance, which is conducive to the relative compactness and miniaturization of the overall structure of the push rod relay while achieving high current carrying performance, and avoids upgrading the design of the magnetic circuit part and the overall structure size. At the same time, the angle structure of the spring piece close to the magnetic circuit at the elastic gap, on the one hand, forms a space for the thrust deformation of the spring piece close to the normally open static spring assembly, reducing the mutual interference of structural stresses during extrusion; on the other hand, it enhances the structural rigidity of the spring piece close to the magnetic circuit compared to the spring piece close to the normally open static spring assembly, making the guarantee of contact closure under thrust more stable, and also constraining the rebound reaction force of the entire moving spring piece when the elastic force is released, reducing the contact ignition arc and secondary conduction phenomenon caused by the rebound reaction force.

[0020] Furthermore, the reed close to the magnetic circuit is integrally composed of a pin section, a bent section and a push section. The bent section of the reed close to the magnetic circuit is an obliquely bent transition structure in which the pin section is close to the magnetic circuit in the relay structure and the push section is far away from the magnetic circuit in the relay structure. An obtuse-angle matching relationship is formed between the bent section of the reed close to the magnetic circuit and the pin section, and an obtuse-angle matching relationship is formed between the bent section of the reed close to the magnetic circuit and the push section. In the overlapping relationship of two adjacently arranged spring leaves, the angle position between the bending section and the pin section of the spring leaf close to the magnetic circuit part is spaced to match the angle position between the bending section and the pin section of the spring leaf close to the normally open static spring assembly.

[0021] The above-mentioned technical measures enable the elastic gap of the approximately triangular structure to form an arrangement structure with a certain slope in the vertical height direction. While reliably realizing the utility function of the above-mentioned triangular elastic gap, it can enable the reed close to the magnetic circuit part and the reed close to the normally open static spring assembly to form a stable overlap. Even during thrust deformation, the overlapping structure at the elastic gap will basically not be delaminated. The technical effect of the reed close to the magnetic circuit part having a higher rigidity at the elastic gap than the reed close to the normally open static spring assembly can also be reliably achieved, so that the contact closure under the action of thrust is more stable, and the rebound reaction force constraint of the entire moving reed when the elastic force is released is more reliable.

[0022] Furthermore, the angle between the bent section of the reed close to the magnetic circuit and the lead section is an arc transition structure; The angle between the bending section and the pushing section of the spring sheet close to the magnetic circuit is an arc transition structure.

[0023] The above technical measures can effectively avoid excessive stress concentration at the corner of the spring leaf close to the magnetic circuit, so that during long-term service, plastic deformation or even breakage of the corner will basically not occur.

[0024] Furthermore, the included angle between the bent section of the spring sheet close to the magnetic circuit and the lead section is 110-150°.

[0025] This technical measure has been obtained through repeated optimization and simulation verification. If the angle is too small, it will not only increase the structural stress in the thrust deformation, but also cause the dynamic spring to obviously have a superimposed structural delamination phenomenon at the elastic gap during the thrust deformation; if the angle is too large, it will compress the space for the spring close to the normally open static spring assembly to make room during the thrust deformation, and will also increase the structural stress during the thrust deformation, and at the same time, it will be unfavorable for the superposition and molding of the dynamic spring. Therefore, while reliably realizing the above-mentioned triangular elastic gap utility function, this technical measure can make the spring close to the magnetic circuit part and the spring close to the normally open static spring assembly form a stable superposition, which is easy to form, and the structural stress during the thrust deformation is small, which is one of the key technical guarantees for the present invention to achieve the best effect.

[0026] Furthermore, the reed piece close to the normally open static spring assembly is integrally composed of a pin section, a bending section and a pushing section. The bending section of the reed piece close to the normally open static spring assembly is an oblique bending transition structure in which the pin section is close to the magnetic circuit part in the relay structure and the pushing section is far away from the magnetic circuit part in the relay structure. An obtuse-angle matching relationship is formed between the bending section of the reed piece close to the normally open static spring assembly and the pin section, and an obtuse-angle matching relationship is formed between the bending section of the reed piece close to the normally open static spring assembly and the pushing section; Furthermore, the included angle between the bent section and the pin section of the spring sheet close to the normally open static spring assembly is greater than the included angle between the bent section and the pin section of the spring sheet close to the magnetic circuit portion.

[0027] The above-mentioned technical measures enable the elastic gap of the approximately triangular structure to form an arrangement structure with a certain slope in the vertical height direction. While reliably realizing the utility function of the above-mentioned triangular elastic gap, it can enable the reed close to the magnetic circuit part and the reed close to the normally open static spring assembly to form a stable overlap. Even during thrust deformation, the overlapping structure delamination phenomenon at the elastic gap basically does not occur. The technical effect of the rigidity of the reed close to the normally open static spring assembly at the elastic gap is also reliably achieved that is lower than that of the reed close to the magnetic circuit part, thereby reliably reducing the structural stress of the reed close to the normally open static spring assembly during thrust deformation and improving the bendable deformation performance of the reed close to the normally open static spring assembly under thrust.

[0028] Furthermore, in the overlapping relationship of the two adjacently arranged spring sheets, one corner of the elastic gap is closed at the angle between the bending section and the pin section of the spring sheet close to the normally open static spring assembly, and the other corner of the elastic gap is closed at the angle between the bending section and the pushing section of the spring sheet close to the normally open static spring assembly. This technical measure is based on the two adjacently arranged laminated structures to bend and form an elastic gap that is approximately triangular, which can ensure the stable existence of the elastic gap and will not hinder the stability of the overlapping of the two adjacently arranged laminated structures.

[0029] As one of the preferred technical solutions, the reed body is composed of a first reed and a second reed overlapped in the thickness direction; In the relay structure, the first reed is a reed close to the magnetic circuit portion, and the second reed is a reed close to the normally open static spring assembly.

[0030] Compared with relays of the same specifications, the above technical measures can reliably increase the current-carrying area of ​​the moving reed while basically not requiring any increase in the electromagnetic attraction design requirements, and have good low-temperature rise performance, which is conducive to enabling the formed relays to form dimensionality reduction competition in the market.

[0031] Furthermore, the first spring and the second spring of the spring body are an integrated bent superposition structure, and the superposition bending position is at the top of the contact connection position in the height direction. This technical measure makes it easy to realize the dynamic spring of the double-layer laminated structure. On the one hand, it can save the manufacturing mold of the spring, on the other hand, it is easy to adjust the bending parameters on the spring, on the third hand, the formed dynamic spring has a higher consistency, and on the fourth hand, it is conducive to the simple and rapid automatic forming of the dynamic spring of the double-layer laminated structure.

[0032] As one of the preferred technical solutions, the reed body is combined and connected with independently formed pins at the pin connection position; The pin connected in place extends outward from the bottom of the pin section of the reed body in the height direction.

[0033] Furthermore, the reed body and the pin are connected in a riveted combination, and the pin is arranged on a side of the reed body facing the magnetic circuit portion in the relay structure, and the thickness of the pin is greater than the thickness of the reed body; In the assembly relationship with the base of the relay, the pins serve to be assembled and fixed in the base.

[0034] Furthermore, one end of the pin extends to the elastic gap of the reed body.

[0035] Furthermore, the height of the end of the pin at the elastic gap from the lowest corner of the lowest elastic gap is at most 2 mm.

[0036] The above technical measures form the pin of the moving spring into a structure independent of the spring body, which is conducive to reducing the difficulty of the forming technology of the spring body on the one hand, and is conducive to improving the structural strength of the pin so that the assembly relationship of the moving spring on the base can be stably maintained on the third hand, and is conducive to increasing the current-carrying area of ​​the pin.

[0037] In the above technical measures, the pins are arranged on the side of the reed body facing the magnetic circuit, and one end of the pin extends to the elastic gap of the reed body (including adjacent to the fit or at the fit), so that the pins assembled on the base have a good stopping and limiting effect on the reed body when the elastic force is released, that is, the rebound reaction force of the reed body when the elastic force is released is stopped and constrained, thereby reducing the ignition arc and secondary conduction phenomenon caused by the rebound reaction force.

[0038] Compared with the stop and limit structure attached to the shell in the prior art, the stop and limit effect achieved by the pins achieves the dual functions of "one thing for two uses" without the need to form another stop and limit structure in a complicated and costly manner, which is beneficial to the relative simplification and low cost of the structure of the entire push rod relay.

[0039] A push rod type relay comprises a magnetic circuit part, a contact part and a push card between the magnetic circuit part and the contact part; The dynamic spring assembly constituting the contact portion has any of the dynamic spring sheet structures described above.

[0040] Further, the magnetic circuit part includes a coil frame, an iron core, a coil, a yoke and an armature assembled on a base; The contact portion includes a movable spring assembly and a normally open static spring assembly mounted on a base; or, the contact portion includes a normally closed static spring assembly, a movable spring assembly and a normally open static spring assembly mounted on a base; The magnetic circuit part and the contact part are arranged on the base in a left-right position and matched by a push card; The push card is located between the armature and the movable spring assembly. The armature flipped on the yoke pushes the push card to make the contact part conductive, or the disconnected contact part pushes the push card to make the armature flip on the yoke.

[0041] The dynamic spring assembly of the above-mentioned push rod type relay is formed with the above-mentioned dynamic spring piece as the base, so it has the corresponding technical effects brought by the above-mentioned dynamic spring piece. Specifically, it can effectively improve the phenomenon of structural stress concentration at the edges of the dynamic spring piece on both sides in the width direction, and basically no plastic deformation or even fracture will occur during long-term service. It can also effectively reduce the technical requirements of elastic deformation on the thrust generated by electromagnetic attraction. It can enable the push rod type relay to reliably achieve high current-carrying performance while basically maintaining the original electromagnetic attraction design, avoid upgrading the design of the magnetic circuit part and the overall structural size, which is conducive to the formation of dimensionality reduction competition in the market and has a good market prospect.

[0042] The beneficial technical effect of the present invention is that the above technical measures are aimed at the particularity of the above push rod type relay to form a stacked structure for adapting to the high current working environment. Through the first reed close to the magnetic circuit part, and the cooperation in the width direction with the other reeds far away from the magnetic circuit part, the phenomenon of structural stress concentration at the edges of the two sides of the width direction of the moving reed is effectively improved, and plastic deformation or even fracture will basically not occur in long-term service. Moreover, through the cooperation in the width direction of the first reed and the other reeds, the elastic adjustment hole design on the first reed, and the design of the approximately triangular elastic gap between the two adjacent reeds, the stress of the moving reed in the thrust deformation is small, so that the formed push rod type relay can basically maintain the original electromagnetic suction design to achieve high current carrying performance, and while achieving high current carrying performance, it is conducive to the relative compactness and miniaturization of the overall structure of the push rod type relay, avoiding the upgrading design of the magnetic circuit part and the overall structure size, which is conducive to the formation of dimensionality reduction competition in the market for the formed push rod type relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of the reed body of the present invention.

[0044] Figure 2 for Figure 1 Schematic diagram of the structure of the first reed.

[0045] Figure 3 for Figure 1 Schematic diagram of the structure of the second reed.

[0046] Figure 4 for Figure 1 Left view of .

[0047] Figure 5 for Figure 1 The schematic diagram of the structure of the actuating reed is shown as a reed body and pins.

[0048] Figure 6 It is a structural schematic diagram of the push rod type relay of the present invention.

[0049] Figure 7 Another structural schematic diagram of the push rod type relay of the present invention.

[0050] Figure 8 Another structural schematic diagram of the reed body of the present invention.

[0051] Meanings of the codes in the figure: 1—reed body; 11—first reed; 111—pin segment one; 112—bending segment one; 113—pushing segment one; 114—elastic adjustment step; 115—elastic adjustment hole one; 116—elastic adjustment hole two; 117—pushing card through hole; 12—second reed; 121—pin segment two; 122—bending segment two; 123—pushing segment two; 124—gap one; 1241—inward concave flat bottom one; 1242—corner one; 125—gap two; 1251—inward concave flat bottom two; 1252—corner two; 13—elastic gap; 14—third reed; 2—pin; 3—base; 4—coil; 5—yoke; 6—armature; 7—pushing card; 8—normally open static spring assembly; 9—normally closed static spring assembly. DETAILED DESCRIPTION

[0052] The present invention relates to the field of relay technology, and in particular to a stacked dynamic spring and a push rod type relay comprising the dynamic spring. The main technical solution of the present invention is specifically described below in conjunction with a plurality of embodiments. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The technical solution of the present invention is clearly and in detail explained; Example 2 is combined with the accompanying drawings of the specification - that is, Figure 7 The technical solution of the present invention is clearly and in detail explained; Example 9 is combined with the accompanying drawings of the specification - that is, Figure 8 The technical solution of the present invention is explained clearly and in detail; although other embodiments are not separately drawn with drawings, their main structures can still refer to the drawings of embodiment 1, embodiment 2 or embodiment 9.

[0053] It should be noted that the drawings of the present invention are schematic, and unnecessary details have been simplified to clarify the technical purpose of the present invention, so as to avoid blurring the technical solution of the present invention that contributes to the prior art. In addition, the expressions "approximately", "substantially" and the like regarding quantity or matching relationship in the following text mean that reasonable assembly errors and processing errors in the industry are allowed to exist, and do not literally express absolute quantities or matching relationships.

[0054] Example 1 See also Figure 6 As shown, the push rod type relay of the present invention includes a base 3 and a coil frame, an iron core, a coil 4, a yoke 5, an armature 6, a push card 7, a moving spring assembly and a static spring assembly 8 etc. which are assembled on the base 3.

[0055] Among them, the coil frame, iron core, coil 4, yoke 5 and armature 6 on the base 3 constitute the magnetic circuit part. The movable spring assembly and the normally open static spring assembly 8 on the base 3 (usually, the normally open and normally closed states refer to the double static spring assemblies existing in the relay, the arrangement position of the movable spring assembly is between the two sets of static spring assemblies, the static spring assembly between the magnetic circuit part and the movable spring assembly is usually defined as the normally closed static spring assembly, and the static spring assembly far away from the magnetic circuit part is usually defined as the normally open static spring assembly, and the pull-in / disconnection action of the movable spring assembly is switched between the normally open static spring assembly and the normally closed static spring assembly; since the relay of this embodiment has only one set of static spring assemblies, and the arrangement position of the static spring assembly is far away from the magnetic circuit part compared with the movable spring assembly, so that the movable spring assembly is between the static spring assembly and the magnetic circuit part, and is in a normally open matching relationship with the movable spring assembly, so the static spring assembly mentioned below in this embodiment refers to the normally open static spring assembly 8) constitute the contact part. The magnetic circuit part and the contact part form a left-right arrangement relationship on the base 3, and the push card 7 is located between the armature 6 of the magnetic circuit part and the movable spring assembly of the contact part. The armature 6 flipped on the yoke 5 pushes the push card 7 to move toward the side of the static spring assembly 8, thereby causing the movable spring assembly to deform elastically toward the static spring assembly 8, and the contact part is turned on; or, the contact part is disconnected, and the elastically released movable spring assembly pushes the push card 7, thereby causing the armature 6 to flip on the yoke 5.

[0056] The movable spring assembly is composed of a movable spring piece and a movable contact as described below.

[0057] The static spring assembly is composed of a static spring sheet and a static contact.

[0058] In order to be suitable for high current working conditions, the dynamic spring sheet of the above-mentioned dynamic spring assembly and the static spring sheet of the static spring assembly are relatively thicker than ordinary dynamic spring sheets and static spring sheets, so as to increase the current-carrying area, reduce the current density in the spring sheet during service, and thus reduce the heating phenomenon of the spring sheet, thereby achieving the technical effect of low temperature rise.

[0059] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the movable spring sheet used in the above movable spring assembly has a spring sheet body 1 and a pin 2 which are assembled and connected after being formed separately. In the following structural expressions, the height direction involved refers to the height of the state shown in the figure, that is, the state shown with the base as the assembly bottom; the thickness direction involved refers to the direction of the stacked layer, that is, along the direction of the push card; the width direction involved refers to the direction transverse to the push card.

[0060] In order to adapt to large current carrying and as low thrust as possible, the reed body 1 is a superimposed structure of a first reed 11 (the side adjacent to the magnetic circuit part in the relay structure) and a second reed 12 (the side adjacent to the static reed assembly 8 in the relay structure) in the thickness direction. In order to make the superimposed structure low-cost, easy and high-quality, the first reed 11 and the second reed 12 of the reed body 1 are an integrally bent superimposed structure, and the superimposed bending position is at the top of the contact connection position (i.e., the moving contact connection position) in the height direction.

[0061] In the above-mentioned stacked structure, the first spring piece 11 is integrally formed by a pin section 111 , a bending section 112 and a pushing section 113 .

[0062] Specifically, the pin segment 111 is used as the combined connection pin 2.

[0063] The bending section 112 causes the pin section 111 and the push section 113 to bend and misalign in the thickness direction of the spring body 1, so as to form the elastic gap 13 described below and produce corresponding bending deformation in cooperation with the release of thrust or elastic force during service.

[0064] The push section 113 is used to arrange the push card through hole 117 and the connection position of the movable contact. It is also the main part that produces corresponding bending deformation in response to the release of thrust or elastic force during service.

[0065] Under the bending influence of the above-mentioned bending section 112, the pin section 111 of the first spring piece 11 is close to the magnetic circuit part in the relay structure, and the pushing section 113 is far away from the magnetic circuit part (close to the static spring component) in the relay structure. In order to adapt to the thrust deformation and reduce the electromagnetic attraction design requirements of the thrust generated on the magnetic circuit part, the bending section 112 is an oblique bending transition structure in which the pin section 111 is close to the magnetic circuit part in the relay structure, and the pushing section 113 is far away from the magnetic circuit part in the relay structure, that is, the bending section 112 and the pin section 111 form an obtuse angle matching relationship, and the bending section 112 and the pushing section 113 also form an obtuse angle matching relationship. In order to avoid stress concentration at the bending part of the first spring piece 11, it is required that the bending angle between the bending section 112 and the pin section 111 is a circular arc transition structure, and the bending angle between the bending section 112 and the pushing section 113 is also a circular arc transition structure. As a key part for cooperating with the second spring 12 to produce bending deformation and constrain elastic release reaction force, the angle between the aforementioned bending section 112 and the pin section 111 is reasonably selected within the range of 110 to 150° (for example, 110°, 120°, 130°, 140° or 150°, etc.).

[0066] In the above-mentioned overlapping structure, the second spring piece 12 is integrally formed by the second pin segment 121 , the second bending segment 122 and the second pushing segment 123 .

[0067] Specifically, the pin segment 2 121 is used to cooperate with the pin segment 1 111 to combine and connect the pin 2 .

[0068] The second bending section 122 causes the second pin section 121 and the second pushing section 123 to bend and misalign in the thickness direction of the spring body 1, so as to form the elastic gap 13 described below and produce corresponding bending deformation in cooperation with the release of thrust or elastic force during service.

[0069] The second push section 123 is used to cooperate with the first push section 113 to arrange the connection position of the push card and the connection position of the movable contact. It is also the main part that produces corresponding bending deformation in cooperation with the release of thrust or elastic force during service.

[0070] Under the bending influence of the above-mentioned bending section 2 122, the pin section 2 121 of the second spring piece 12 is close to the magnetic circuit part in the relay structure, and the push section 2 123 is far away from the magnetic circuit part (close to the static spring component) in the relay structure. In order to adapt to the thrust deformation and reduce the electromagnetic attraction design requirements of the thrust generated on the magnetic circuit part, the bending section 2 122 is an oblique bending transition structure in which the pin section 2 121 is close to the magnetic circuit part in the relay structure, and the push section 2 123 is far away from the magnetic circuit part in the relay structure, that is, the bending section 2 122 and the pin section 2 121 form an obtuse angle matching relationship, and the bending section 2 122 and the push section 2 123 also form an obtuse angle matching relationship. In order to avoid stress concentration at the bending part of the second spring piece 12, it is required that the bending angle between the bending section 2 122 and the pin section 2 121 is a circular arc transition structure, and the bending angle between the bending section 2 122 and the push section 2 123 is also a circular arc transition structure.

[0071] In the overlapping relationship between the first spring piece 11 of the above structure and the second spring piece 12 of the above structure, the angle position between the bending section 1 112 of the first spring piece 11 and the pin section 1 111 is higher than the angle position between the bending section 2 122 of the second spring piece 12 and the pin section 2 121, and the angles of the two positions form a spacing match in the height direction. Moreover, the angle between the bending section 2 122 of the second spring piece 12 and the pin section 2 121 is greater than the angle between the bending section 1 112 of the first spring piece 11 and the pin section 1 111.

[0072] In the overlapping relationship between the first spring piece 11 of the structure and the second spring piece 12 of the structure, the angle position between the second bending section 122 and the second pushing section 123 of the second spring piece 12 is substantially coincident with the angle position between the first bending section 112 and the first pushing section 113 of the first spring piece 11. Thus, between the first spring piece 11 and the second spring piece 12 of the overlapping spring body 1, an elastic gap 13 is formed which is located between the pin connection position and the pushing connection position, is arranged obliquely, and has a substantially triangular structure.

[0073] One corner of the elastic gap 13 is closed due to the overlapped relationship at the angle between the second bending section 122 and the second pin section 121 of the second spring piece 12, and the other corner is closed due to the overlapped relationship at the angle between the second bending section 122 and the second pushing section 123 of the second spring piece 12. It is also based on this approximately triangular elastic gap 13 that the second bending section 122 of the second spring piece 12 constitutes a bottom edge of the elastic gap 13 arranged obliquely, and the bending section 112 of the first spring piece 11 and the part of the pin section 111 close to the bending section 112 constitute two waist edges of the elastic gap 13, the length of the bottom edge is respectively greater than the length of the two waist edges, and the two waist edges constitute an obtuse angle matching relationship as required above.

[0074] The specific triangular elastic gap 13 formed between the first spring piece 11 and the second spring piece 12 in the above-mentioned overlapping relationship, due to the waist formed by the bending of the first spring piece 11, forms a space for the second spring piece 12 in service to deform in accordance with the thrust, reduces the interference of their structural stresses during extrusion, and makes the bending deformation performance of the dynamic spring piece of the overlapping structure good. At the same time, the second spring piece 12 forms a matching relationship with a bending angle greater than the first spring piece 11 at the corresponding bending position, effectively improving the performance of the second spring piece 12 in adapting to bending deformation under the action of thrust, and it basically does not cause a reaction force of thrust deformation to the first spring piece 11, and has good compliance, which effectively reduces the structural stress of the entire dynamic spring piece in thrust deformation, so that the formed push rod relay is as small as possible, and the thrust required for contact closure can be achieved by basically maintaining the original electromagnetic attraction design. It can be seen that while the current carrying performance is improved, the electromagnetic attraction of the magnetic circuit part will not be increased, so as to avoid upgrading the design of the magnetic circuit part and the overall structural size as much as possible while meeting the high current carrying technical requirements. Of course, the two waist angle structures of the first spring piece 11 at the elastic gap 13 will produce a certain rigid support when bent, that is, the structural rigidity of the first spring piece 11 is enhanced compared with the second spring piece 12, so that the contact closure is more stably guaranteed under the thrust, and the rebound reaction force of the entire moving spring piece when the elastic force is released is constrained and limited, thereby reducing the contact ignition arc and secondary conduction phenomenon caused by the rebound reaction force.

[0075] When the reed body 1 of the above structure is used in a relay, it needs to be assembled with a push card, so a push connection position, namely a push card through hole 117 , is provided on the reed body 1 .

[0076] In the above-mentioned overlapping structure of the spring body 1, in order to adapt to the elastic force adjustment, it is not appropriate to set the first spring 11 and the second spring 12 to be equal in width, so the width of the second spring 12 is designed to be smaller than the width of the first spring 11, so that the second spring 12 can effectively optimize the rebound reaction force of the entire moving spring when the elastic force is released, and reduce the technical requirements for the thrust generated by the electromagnetic suction force. Among them, the specific width difference is mainly reflected in the push connection position and the pin connection position of the spring body 1, that is, in the area where the push section is used as the forming push card through hole 117, the width of the first spring 11 is greater than the width of the second spring 12, and the area where the push section is used as the forming contact assembly hole is set to be equal in width to ensure the stability of the moving contact assembly; in the area where the pin section is used as the forming elastic adjustment step 114, the width of the first spring 11 is greater than the width of the second spring 12.

[0077] It can be seen that the push card through hole 117 of the spring body 1 is actually formed at the two side edges in the width direction of the first spring 11, and is formed in a C-shaped profile structure with the opening facing outward. The push card through holes 117 on both sides are basically formed in a left-right symmetrical structure, forming a group of elastic adjustment structures. The elastic adjustment step 114 of the spring body 1 is actually formed at the two side edges in the width direction of the first spring 11, and is formed in a step concave structure with a relatively wide lower side and a relatively narrow upper side. The elastic adjustment step 114 is specifically located between the pin connection position of the spring body 1 and the elastic gap 13. The elastic adjustment steps 114 on both sides are basically formed in a left-right symmetrical structure, forming a group of elastic adjustment structures.

[0078] The first spring piece 11 having the push card through hole 117 and the elastic adjustment step 114 has a relatively concentrated stress phenomenon because the push card through hole 117 and the elastic adjustment step 114 are formed in a concave structure at the corresponding edges of the first spring piece 11 . Based on this phenomenon and the above-mentioned width difference matching structure, in order to avoid stress concentration of the entire spring body 1 and plastic deformation or even fracture during repeated thrust deformation, a recessed structure 124 is formed at the edge area of ​​the second spring 12 corresponding to the push card through hole 117 on the first spring 11, which is staggered from the corresponding push card through hole 117, so that the edge area of ​​the second spring 12 corresponding to the push card through hole 117 on the first spring 11 is located on the inner side of the corresponding push card through hole 117 and forms a spacing match with the corresponding push card through hole 117; and a recessed structure 225 is formed at the edge area of ​​the second spring 12 corresponding to the elastic adjustment step 114 on the first spring 11, which is staggered from the corresponding elastic adjustment step 114, so that the edge area of ​​the second spring 12 corresponding to the elastic adjustment step 114 on the first spring 11 is located on the inner side of the corresponding elastic adjustment step 114 and forms a spacing match with the corresponding elastic adjustment step 114.

[0079] Regarding the above-mentioned clearance notch 124 on the second spring piece 12 corresponding to the push card through hole 117, in order to reduce the requirement for thrust and improve the stress concentration phenomenon, it is not appropriate to form a "larger" push card through hole profile structure. Therefore, the clearance notch 124 on the second spring piece 12 is designed as a flat bottom concave structure, which has corners 1242 located at the top and bottom sides of the concave flat bottom 1241 (vertical edge) in the height direction. The two corners 1242 are located at the inner sides of the top and bottom sides of the corresponding push card through hole 117 in the height direction, which makes the clearance notch 124 on the second spring piece 12 match the corresponding C-shaped push card through hole 117 on the first spring piece 11 with a rectangular structure similar to a sunken groove.

[0080] Regarding the second clearance notch 125 on the second reed 12 corresponding to the elastic adjustment step 114, in order to improve the stress concentration phenomenon, it is not appropriate to form a "larger" elastic adjustment step profile structure. Therefore, the second clearance notch 125 on the second reed 12 is designed as a flat bottom concave structure, which has two corners 1252 located on the top and bottom sides of the concave flat bottom 1251 (vertical edge) in the height direction. The two corners 1252 are located on the inner side of the top and bottom sides of the corresponding elastic adjustment step 114 in the height direction, which makes the second clearance notch 125 on the second reed 12 match the corresponding step-type elastic adjustment step 114 on the first reed 11 with a rectangular structure similar to a sunken groove.

[0081] On the basis of the above-mentioned spring body 1, in order to reduce the elastic reaction force of the first spring 11 so as to constrain the rebound reaction force of the movable spring when the elastic force is released, an elastic adjustment hole 115 is provided on the pin section 111 of the first spring 11, which is located at the top side of the pin connection position in the height direction and basically in the center area of ​​the width; and an elastic adjustment hole 2 116 is provided on the pushing section 113 of the first spring 11, which is located in the middle of the pushing card through hole 117 in the width direction.

[0082] The reed body 1 of the above structure is provided with a rivet hole for combining and connecting the pin 2 at its pin section, i.e., the pin connection position, which penetrates the first reed 11 and the second reed 12 in the thickness direction. The pin 2 constituting the movable reed is combined and connected to the pin connection position of the reed body 1 by a riveting relationship, and is located on the side of the reed body 1 facing the magnetic circuit part in the relay structure. The bottom end of the pin 2 extends outward from the bottom of the pin section of the reed body 1 in the height direction, and the top end of the pin 2 extends to the elastic gap 13 of the reed body 1, and is located between the heights of the two corners constituting the elastic gap 13 (i.e., the area between the angle between the bending section 112 of the first reed 11 and the pin section 111, and the angle between the bending section 2 122 of the second reed 12 and the pin section 2 121). In this way, the upper part of the pin 2 has a stop and limit effect on the pin section of the spring body 1 as a backrest support, so that the spring body 1 that is released and rebounded by the elastic force is greatly reduced due to the stop limit at the elastic gap 13, avoiding arcing and secondary conduction with the static spring component caused by excessive elastic release reaction force. Of course, in order to improve the stop rigidity and current carrying capacity of the pin 2 and the socket stability on the base, the thickness of the pin 2 should be greater than the thickness of the spring body 1, and a conductive material with higher hardness can be used for molding, so that the pin 2 with higher hardness can stably limit the spring body 1 when assembled on the base.

[0083] Compared with a reed body with an elastic gap 13 having an approximately obtuse triangle structure, a reed body with an elastic gap having an approximately right-angled triangle structure, a reed body with an elastic gap having an approximately semicircular structure, or a reed body with an elastic gap having an approximately parallelogram structure, the reed body 1 having an elastic gap 13 having an approximately obtuse triangle structure as described above will basically not have overlapping and delamination phenomena during thrust deformation under the same thrust conditions, and the stress at the push card perforation point is lower, and the thrust requirement for the electromagnetic attraction is small.

[0084] Example 2 The other contents of this embodiment are the same as those of Embodiment 1, except that the contact part of the relay is mainly composed of a moving spring assembly on the base and two sets of static spring assemblies.

[0085] See Figure 7 As shown, the push rod type relay of the present invention includes a base 3 and a coil frame, an iron core, a coil 4, a yoke 5, an armature 6, a push card 7, a moving spring assembly, a normally open static spring assembly 8 and a normally closed static spring assembly 9 assembled on the base 3.

[0086] Among them, the magnetic circuit part composed of the iron core, coil 4, yoke 5 and armature 6 arranged at the coil frame on the base 3 and the contact part composed of the movable spring assembly, normally open static spring assembly 8 and normally closed static spring assembly 9 on the base 3 form a left-right arrangement relationship on the base 3. In the composition structure of the aforementioned contact part, the movable spring assembly is between the normally closed static spring assembly 9 and the normally open static spring assembly 8, the arrangement position of the normally closed static spring assembly 9 on the base 3 is close to the magnetic circuit part, and the arrangement position of the normally open static spring assembly 8 is far away from the magnetic circuit part; in the initial state of the relay, the movable contact of the movable spring assembly is attracted with the static contact of the normally closed static spring assembly 9, and when the magnetic circuit part reaches the magnetic field required by the design, the push card 7 pushes the movable spring assembly to deform and separate the normally closed static spring assembly 9 and attract the normally open static spring assembly 8.

[0087] The push card 7 is located between the armature 6 and the movable spring assembly. The armature 6 flipped on the yoke 5 pushes the push card 7 to turn on the normally open contact part, or the normally open contact part that is disconnected pushes the push card 7 to flip the armature 6 on the yoke 5. Based on the arrangement positions of the normally closed static spring assembly 9 and the normally open static spring assembly 8 of the above-mentioned contact part on the left and right sides compared with the movable spring assembly, when the push card 7 pushes and cooperates with the movable spring assembly, it needs to pass through the normally closed static spring assembly 9 in the pushing direction. Therefore, the spring leaf width of the normally closed static spring assembly 9 is smaller than the bifurcation width of the push card 7 at one end in contact with the movable spring assembly, and is located in the bifurcation space of the push card 7 at one end in contact with the movable spring assembly; and the bifurcation depth of the push card at one end in contact with the movable spring assembly, when the push card 7 runs to the maximum stroke in the pushing direction, basically does not touch the normally closed static spring assembly 9.

[0088] Example 3 The other contents of this embodiment are the same as those of Embodiment 1, except that: The pins combined and connected at the pin section of the reed body have their top ends extending to the lower side of the elastic gap of the reed body, and the height from the lowest corner of the elastic gap is about 2 mm.

[0089] Example 4 The other contents of this embodiment are the same as those of Embodiment 1, except that: The pins combined and connected at the pin section of the reed body have their top ends extending to the lower side of the elastic gap of the reed body, and the height from the lowest corner of the elastic gap is about 1 mm.

[0090] Example 5 The other contents of this embodiment are the same as those of Embodiment 1, except that: The second clearance notch of the second spring at the pin section is designed as a C-shaped profile structure, which is surrounded by the inner periphery of the elastic adjustment step.

[0091] Example 6 The other contents of this embodiment are the same as those of Embodiment 1, except that: Remove the elasticity adjustment hole 1 and / or the elasticity adjustment hole 2 on the first reed.

[0092] Of course, its effect of adjusting the elastic properties of the first reed will also be eliminated due to its removal.

[0093] Example 7 The other contents of this embodiment are the same as those of Embodiment 1, except that: The portion of the first reed that forms the elastic gap is formed into a C-shaped semicircular structure; the second reed is formed into a straight structure to form the elastic gap structure of the movable reed as cited in the above background technology part.

[0094] Of course, this embodiment still has the performance of improving stress concentration and certain elastic adjustment brought by the clearance gap, but it will also eliminate the technical advantages of the triangular elastic gap.

[0095] Example 8 The other contents of this embodiment are the same as those of Embodiment 1, except that: The angle between the bending section 2 and the pushing section 2 of the second spring sheet and the angle between the bending section 1 and the pushing section 1 of the first spring sheet are matched in the height direction. The height of the matching spacing basically corresponds to the height of the matching spacing between the "angle between the bending section 2 and the pin section 2" and the "angle between the bending section 1 and the pin section 1" described in Example 1, so that the elastic gap between the first spring sheet and the second spring sheet constitutes a structure approximating to a parallelogram.

[0096] Of course, this embodiment still has the performance of improving stress concentration and certain elastic adjustment brought by the clearance gap, but it will also eliminate the technical advantages of the triangular elastic gap.

[0097] Example 9 The other contents of this embodiment are the same as those of Embodiment 1 or Embodiment 2, except that the spring body of the dynamic spring assembly is a three-layer stacked structure.

[0098] See also Figure 8 As shown (the viewing angle in the horizontal and wide direction can be seen in Figure 1 , Figure 2 and Figure 3 As shown in FIG. 1 , the spring body 1 of the dynamic spring assembly is a superimposed structure of a first spring 11, a second spring 12 and a third spring 14 in the thickness direction. The first spring 11 is adjacent to one side of the magnetic circuit part in the relay structure. The third spring 14 is adjacent to one side of the normally open static spring assembly in the relay structure. The second spring 12 is between the first spring 11 and the third spring 13.

[0099] In such Figure 8In the three-piece superimposed structure shown, the structure of the third spring 14 in the horizontal width direction is basically the same as that of the second spring 12 (the difference is mainly reflected in the triangular elastic gap formed at the bend), and the first spring 11 maintains the same structure as the first spring 11 in Example 1, that is, the second spring 12 and the third spring 14 are more like the superimposed structure of two springs with basically the same structure in the thickness direction. In this way, the first spring 11 is close to the magnetic circuit part in the relay structure, and has a push card through hole 117 and an elastic adjustment step 114, while the second spring 12 and the third spring 13 have a yield structure in the same position and structure - that is, yield gap 1 124 / yield gap 2 125.

[0100] In such Figure 8 In the three-piece superimposed structure shown, the first spring piece 11 and the second spring piece 12 are arranged adjacent to each other, and a specific triangular structure elastic gap 13 is formed between the two; the second spring piece 12 and the third spring piece 14 are arranged adjacent to each other, and a specific triangular structure elastic gap 13 is formed between the two. Therefore, referring to the specific triangular structure elastic gap 13 in Example 1, the first spring piece 11, the second spring piece 12 and the third spring piece 14 are divided into two groups according to adjacent positions in the thickness direction, that is, the first group of adjacent positions is composed of the first spring piece 11 and the second spring piece 12 superimposed, and the second group of adjacent positions is composed of the second spring piece 12 and the third spring piece 13 superimposed.

[0101] According to the above grouping, the first reed 11 and the second reed 12 in the first group of adjacent positions are arranged in the relay structure such that the first reed 11 is arranged relatively close to the magnetic circuit part, i.e., close to the magnetic circuit part reed, and the second reed 12 is arranged relatively far from the magnetic circuit part and close to the normally open static spring assembly, i.e., close to the normally open static spring assembly reed. The first reed 11 and the second reed 12 refer to the arrangement structure of the first reed (i.e., corresponding to the first reed 11 in the first group of adjacent positions) and the second reed (i.e., corresponding to the second reed 12 in the first group of adjacent positions) in Example 1 to form a specific triangular structure elastic gap 13 (except for the width difference structure and the yielding structure).

[0102] According to the above grouping, the second reed 12 and the third reed 14 in the second group of adjacent positions are arranged in the relay structure such that the second reed 12 is arranged relatively close to the magnetic circuit part, i.e., close to the magnetic circuit part reed, and the third reed 14 is arranged relatively far from the magnetic circuit part and close to the normally open static spring assembly, i.e., close to the normally open static spring assembly reed. The second reed 12 and the third reed 14 refer to the arrangement structure of the first reed (i.e., corresponding to the second reed 12 in the second group of adjacent positions) and the second reed (i.e., corresponding to the third reed 14 in the second group of adjacent positions) in Example 1 to form a specific triangular structure elastic gap 13 (except for the width difference structure and the yielding structure).

[0103] The superimposed structure spring body 1 of the first spring 11, the second spring 12 and the third spring 14 arranged in two adjacent groups as above forms two layered approximately triangular elastic gaps 13 in the area between the pin connection position and the push connection position. The bending structure of the first spring 11 constitutes the two waist sides of the first triangular elastic gap 13, and the bending structure of the second spring 12 constitutes the bottom side of the first triangular elastic gap 13. The bending structure of the second spring 12 constitutes the two waist sides of the second triangular elastic gap 13, and the bending structure of the third spring 14 constitutes the bottom side of the second triangular elastic gap 13. This also makes the length of the bottom side of the second triangular elastic gap 13 greater than the length of the bottom side of the first triangular elastic gap 13; the vertex angle between the two waist sides of the second triangular elastic gap 13 is greater than the vertex angle between the two waist sides of the first triangular elastic gap 13. The closed angles of the two triangular elastic gaps 13 in the pushing direction tend to be arranged at the same height, but the closed angles of the two triangular elastic gaps in the height direction are differentiated, and the closed angle of the second triangular elastic gap 13 in the height direction is lower than the closed angle of the first triangular elastic gap 13 in the height direction.

[0104] The above embodiments are only used to illustrate the present invention, rather than to limit it. Of course, in terms of effect, Example 1 is the best implementation scheme of the present invention.

[0105] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the above embodiments or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not deviate the essence of the corresponding technical solutions from the spirit and scope of the present invention.

Claims

1. A stacked movable reed, comprising a reed body (1); The reed body (1) comprises a plurality of reeds stacked together in the thickness direction; In the relay structure, the reeds of the reed body (1) are arranged in order from near to far relative to the magnetic circuit portion, and the reed closer to the magnetic circuit portion is the first reed (11); The first reed (11) has at least one group of concave structures at both side edges in the width direction, which are used to adjust the elasticity of the first reed (11); The remaining reeds in the reed body (1) except the first reed (11) have, corresponding to the edge area of ​​the concave structure on the first reed (11), a recessed notch which is formed inwardly and located on the inner side of the corresponding concave structure and staggered from the contour of the corresponding concave structure.

2. The stacked dynamic spring according to claim 1, characterized in that: The concave structures at the edges of both sides of the first spring piece (11) in the width direction are push card through holes (117) formed at the edges of the push section 1 (113) of the first spring piece (11), and the push card through holes (117) on each side are C-shaped profile structures opening outwards; Correspondingly, the edges of the pushing sections of the remaining spring leaves have a recessed notch (124) that is offset from the corresponding pushing card through hole (117), and the contour edge of the recess (124) is spaced to match the contour edge of the corresponding pushing card through hole (117).

3. The stacked dynamic spring according to claim 2, characterized in that: The clearance notch (124) is a flat-bottomed concave structure, having corners (1242) located on the top and bottom sides of the concave flat bottom (1241) in the height direction, and the two corners (1242) are located on the inner sides of the top and bottom sides of the corresponding push card through hole (117) in the height direction.

4. The stacked dynamic spring according to claim 1, characterized in that: The concave structures at the edges of both sides of the first spring sheet (11) in the width direction are elastic adjustment steps (114) formed at the edge of the first pin section (111) of the first spring sheet (11), and the elastic adjustment step (114) on each side is a step structure located above the pin connection position and having a wide bottom side and a narrow top side; Correspondingly, the edges of the pin sections of the remaining spring sheets have a second recessed notch (125) that is formed inwardly and staggered from the corresponding elastic adjustment step (114), and the contour edge of the second recess (125) forms a spacing match with the contour edge of the corresponding elastic adjustment step (114).

5. The stacked dynamic spring according to claim 4, characterized in that: The second clearance notch (125) is a flat-bottomed concave structure, having two corners (1252) located on the top and bottom sides of the concave flat bottom (1251) in the height direction, and the two corners (1252) are located on the inner sides of the top and bottom sides of the corresponding elastic adjustment step (114) in the height direction.

6. The stacked movable spring according to claim 1, 2 or 4, characterized in that: The width of each of the remaining reeds except the first reed (11), at least at the pushing section and the pin section, is smaller than the width of the first reed (11) at the corresponding position.

7. The stacked movable spring according to claim 1, 2 or 4, characterized in that: A first elastic adjustment hole (115) is provided on the first pin segment (111) of the first spring sheet (11) at the top side of the pin connection position in the height direction and at the center in the width direction; And / or, the first push section (113) of the first spring sheet (11) is provided with a second elastic adjustment hole (116) located in the middle of the push card through hole (117) in the width direction.

8. The stacked dynamic spring according to claim 1, characterized in that: In the stacked structure of the spring body (1), between two adjacently arranged springs, there is an elastic gap (13) in a triangular structure between the pin section and the push section; Furthermore, between the two adjacently arranged spring leaves, the spring leaf close to the normally open static spring assembly forms a bottom edge of the elastic gap (13), and the spring leaf close to the magnetic circuit portion forms two waist edges of the elastic gap (13), and the length of the bottom edge is respectively greater than the length of the two waist edges.

9. The stacked dynamic spring according to claim 8, characterized in that: The reed piece close to the magnetic circuit is integrally composed of a pin section, a bending section and a pushing section. The bending section of the reed piece close to the magnetic circuit is an oblique bending transition structure in which the pin section is close to the magnetic circuit section in the relay structure and the pushing section is far away from the magnetic circuit section in the relay structure. The bending section of the reed piece close to the magnetic circuit section forms an obtuse angle matching relationship with the pin section, and the bending section of the reed piece close to the magnetic circuit section forms an obtuse angle matching relationship with the pushing section. In the overlapping relationship of two adjacently arranged spring leaves, the angle position between the bending section and the pin section of the spring leaf close to the magnetic circuit part is spaced to match the angle position between the bending section and the pin section of the spring leaf close to the normally open static spring assembly.

10. The stacked movable spring according to claim 9, characterized in that: The angle between the bent section of the reed close to the magnetic circuit and the lead section is an arc transition structure; The angle between the bending section and the pushing section of the spring sheet close to the magnetic circuit is an arc transition structure.

11. The stacked movable spring according to claim 9 or 10, characterized in that: The included angle between the bent section of the spring sheet close to the magnetic circuit and the lead section is 110-150°.

12. The stacked dynamic spring according to claim 8, characterized in that: The reed piece close to the normally open static spring assembly is integrally composed of a pin section, a bending section and a pushing section. The bending section of the reed piece close to the normally open static spring assembly is an oblique bending transition structure in which the pin section is close to the magnetic circuit part in the relay structure and the pushing section is far away from the magnetic circuit part in the relay structure. An obtuse-angle matching relationship is formed between the bending section of the reed piece close to the normally open static spring assembly and the pin section, and an obtuse-angle matching relationship is formed between the bending section of the reed piece close to the normally open static spring assembly and the pushing section; Furthermore, the included angle between the bent section and the pin section of the spring sheet close to the normally open static spring assembly is greater than the included angle between the bent section and the pin section of the spring sheet close to the magnetic circuit portion.

13. The stacked movable spring according to claim 8, 9 or 12, characterized in that: In the overlapping relationship of two adjacently arranged spring leaves, one corner of the elastic gap (13) is closed at the angle between the bent section and the pin section of the spring leaf close to the normally open static spring assembly, and the other corner of the elastic gap (13) is closed at the angle between the bent section and the push section of the spring leaf close to the normally open static spring assembly.

14. The stacked movable spring according to claim 1 or 8, characterized in that: The reed body (1) is composed of a first reed (11) and a second reed (12) stacked in a thickness direction; In the relay structure, the first reed (11) is a reed close to the magnetic circuit portion, and the second reed (12) is a reed close to the normally open static spring assembly.

15. The stacked movable spring according to claim 14, characterized in that: The first spring leaf (11) and the second spring leaf (12) of the spring leaf body (1) are an integrated bent superimposed structure, and the bent position of the superimposed structure is located at the top of the contact connection position in the height direction.

16. The stacked movable spring according to claim 1 or 8, characterized in that: The reed body (1) is combined and connected with an independently formed pin (2) at the pin connection position; The pin (2) connected in place extends outward from the bottom of the pin section of the reed body (1) in the height direction.

17. The stacked movable spring according to claim 16, characterized in that: The reed body (1) and the pin (2) are combined and connected in a riveted relationship, and the pin (2) is arranged on a side of the reed body (1) facing the magnetic circuit portion in the relay structure, and the thickness of the pin (2) is greater than the thickness of the reed body (1); In the assembly relationship with the base of the relay, the pin (2) is used to be assembled and fixed in the base.

18. The stacked movable spring according to claim 17, characterized in that: One end of the pin (2) extends to the elastic gap (13) of the reed body (1).

19. The stacked movable spring according to claim 18, characterized in that: The height of the end of the pin (2) at the elastic gap (13) from the lowest corner of the lowest elastic gap is at most 2 mm.

20. A push rod type relay, comprising a magnetic circuit part, a contact part and a push card between the magnetic circuit part and the contact part; Features: The dynamic spring assembly constituting the contact portion has the dynamic spring piece structure as claimed in any one of claims 1 to 19.

21. The push rod type relay according to claim 20, characterized in that: The magnetic circuit part comprises a coil frame, an iron core, a coil (4), a yoke (5) and an armature (6) which are assembled on a base (3); The contact portion comprises a movable spring assembly and a normally open static spring assembly (8) mounted on the base (3); or, the contact portion comprises a normally closed static spring assembly (9), a movable spring assembly and a normally open static spring assembly (8) mounted on the base (3); The magnetic circuit portion and the contact portion are arranged in a left-right relationship on the base (3) and matched via a push card (7); The push card (7) is located between the armature (6) and the dynamic spring assembly.

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