High-current-carrying movable contact spring and push rod type relay comprising movable contact spring

Abstract

The invention relates to the technical field of relays, and particularly discloses a high-load movable contact spring and a push rod type relay comprising the movable contact spring. Wherein the movable contact spring is provided with a contact spring body, and the contact spring body is of an overlapped structure of at least two contact springs in the thickness direction; in the overlapping structure, the springback side reed and the pushing side reed which are adjacently arranged are provided with an elastic gap which is located between the pin connecting position and the pushing connecting position and is of a triangular structure. The pushing side reed forms a bottom edge of the elastic gap; the springback side reeds form two waist edges of the elastic gap; the length of the bottom edge is larger than that of the two waist edges. According to the invention, the formed push rod type relay can realize high current-carrying performance by basically keeping the original electromagnetic attraction design, the formed push rod type relay can form dimension reduction competition in the market, and the market prospect is good.

Description

Technical Field

[0001] The invention relates to the technical field of relays, in particular to a high-load current reed and a push rod type relay comprising the 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 and connected by a push card. The magnetic circuit part is mainly composed of 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 with a flippable structure, and a compression spring that applies spring force on the back of the armature. The contact part is mainly composed of a moving 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 meet the technical requirements of high current working environment, the push rod type relay will form the moving spring in a double-layer laminated structure under the guidance of the design logic of minimizing the increase of electromagnetic attraction of the magnetic circuit part, so that the moving spring can achieve high current carrying and low temperature rise performance. In order to adapt to the thrust deformation caused by the electromagnetic attraction through the push card and avoid the structural stress of the double-layer laminate in the extrusion causing obstacles to the thrust deformation, a layered elastic gap will be formed in the laminated structure of the double-layer laminate between the pin connection position and the push connection position. The elastic gap used by the high-load current reed of the push rod type relay is mostly formed in a layered structure that is approximately semicircular or approximately circular. For example, the Chinese patent literature discloses a technology named "A small electromagnetic relay", publication number CN 213150682 U, publication date May 7, 2021, a technology named "A electromagnetic relay", publication number CN214505389 U, publication date October 26, 2021, and a technology named "Electromagnetic relay with spring push structure", publication number CN 1652278 A, publication date August 10, 2005.

[0004] The applicant discovered during the research that the double-laminated moving spring sheet adopts an elastic gap with a semicircular structure (such as the technology of publication numbers CN 213150682 U and CN 214505389 U). Because the semicircular structure is formed on the spring sheet on the side close to the magnetic circuit part (i.e., the rebound side spring sheet), and the spring sheet on the side close to the static spring (i.e., the pushing side spring sheet) is a straight plate structure, when the thrust acts on the moving spring sheet, the pushing side spring sheet of the straight plate structure will generate a reverse force, so that the structural stress of the entire moving spring sheet during extrusion is relatively large, which hinders the thrust deformation and requires a larger electromagnetic suction force to bring about the thrust. The double-laminated movable spring piece adopts an elastic gap of a circular structure (such as the technology of publication number CN 1652278 A). Because the rebound side spring piece and the push side spring piece have semicircular structures respectively and the two are bent and layered structures facing each other, when the thrust acts on the movable spring piece, the semicircular structure of the push side spring piece will generate a large reverse force, which makes the structural stress of the entire movable spring piece in the extrusion significantly increase, causing a significant obstacle to the thrust deformation, and requires a larger electromagnetic suction force to bring the thrust; moreover, in the long-term repeated elastic deformation process, the push side spring piece is prone to plastic deformation or even fracture.

[0005] It can be seen that the above-mentioned double-laminated high-load current spring still needs to be improved under the guidance of the design logic of minimizing the increase of the electromagnetic attraction of the magnetic circuit part.

[0006] The applicant also found in the search that in other structural types of relays, there is a design of elastic gap of a parallelogram-like shape for the double-laminated moving spring, such as the technology disclosed in the Chinese patent document entitled "A moving spring assembly and relay", with a publication number of CN 216957911 U and a publication date of July 12, 2022. This technology forms a parallelogram elastic gap by forming two bending parts on the pushing side spring that are offset from the rebound side spring. During the thrust deformation, the two bending parts of the pushing side spring will generate a reverse force (similar to the technology of publication number CN1652278 A, and of course better than the technology of CN 1652278 A), which makes the structural stress of the entire moving spring larger during extrusion, hinders the thrust deformation, and requires a larger electromagnetic suction force to bring thrust; moreover, during the long-term repeated elastic deformation process, the pushing side spring is prone to plastic deformation or even fracture.

[0007] In summary, the elastic gap design adopted by the existing double-laminated structure dynamic spring has a technical problem of large structural stress, and needs to be improved to meet the high technical requirements of the market. Summary of the invention

[0008] The technical purpose of the present invention is to provide a high-load current reed with small structural stress during thrust deformation, and a push rod relay including the moving reed, 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.

[0009] The technical purpose of the present invention is achieved by the following technical solution: a high-load flow reed, comprising a reed body; The reed body is a structure in which at least two reeds are overlapped in the thickness direction; In the overlapping structure of the reed body, two adjacently arranged reeds are divided into a rebound side reed and a push side reed according to the pushing and rebounding directions of the moving reed; Between the rebound side spring piece and the push side spring piece arranged in adjacent positions, there is an elastic gap in a triangular structure between the pin connection position and the push connection position; Furthermore, the pushing side spring sheet forms a bottom edge of the elastic gap; The rebound side springs form two waist edges of the elastic gap; The length of the bottom edge is respectively greater than the length of the two waist edges.

[0010] The above technical measures are aimed at the particularity of the above push rod type relay to adapt to the high current working environment. The moving reed is composed of a multi-layer stacked structure with a large current-carrying area. On the one hand, this multi-layer stacked structure minimizes the influence of the large current-carrying area on the electromagnetic attraction design of the magnetic circuit part. On the other hand, the large current-carrying area reduces the current density of the reed when carrying current, achieving high current carrying, thereby reducing the heating phenomenon of the moving reed in the high current working environment.

[0011] On this basis, the above technical measures design the elastic gap between the adjacently arranged double-layer laminates into a specific approximately triangular structure to improve the bending deformation performance of the pushing side spring (in the relay structure, the spring arranged along the pushing and bending direction of the pushing card (opposite to the elastic release direction of the moving spring), which is relatively far away from the magnetic circuit part and close to the static spring assembly (if any) in front of the pushing and bending direction, the same below) under the action of thrust, effectively reduce the structural stress of the pushing side spring in the thrust deformation, so that the formed push rod relay can basically maintain the original electromagnetic suction design to achieve high current carrying performance, while achieving high current carrying performance, which is beneficial to the relative compactness and miniaturization of the overall structure of the push rod relay, and avoids upgrading the design of the magnetic circuit part and the overall structure size. At the same time, the angle structure of the adjacently arranged rebound side springs (in the relay structure, the springs arranged along the elastic release movement direction of the moving spring (opposite to the pushing and bending direction of the pushing card), which are relatively close to the magnetic circuit part and away from the static spring assembly (if any) in front of the pushing and bending direction, the same below) at the elastic gap, on the one hand, forms a clearance space for the thrust deformation of the pushing side springs, reducing the mutual interference of structural stresses during extrusion; on the other hand, it enhances the structural rigidity of the rebound side springs compared to the pushing side springs, making the contact closure under the thrust more stable, and also constraining the rebound reaction force of the entire moving spring when the elastic force is released, reducing the contact ignition arc and secondary conduction caused by the rebound reaction force.

[0012] As one of the preferred technical solutions, in the relay structure, the arrangement position of the adjacently arranged rebound side springs is close to the magnetic circuit part, and the arrangement position of the adjacently arranged push side springs is far away from the magnetic circuit part. This technical measure is designed for the pushing direction of the push card of the push rod relay on the moving spring, and the rebound direction of the pushed spring when the elasticity is released, and has the above-mentioned technical effects.

[0013] As one of the preferred technical solutions, the rebound side spring piece is integrally composed of a pin section 1, a bending section 1 and a pushing section 1; The bending section 1 is an oblique bending transition structure where the pin section 1 is close to the magnetic circuit part in the relay structure and the pushing section 1 is far away from the magnetic circuit part in the relay structure, and an obtuse angle matching relationship is formed between the bending section 1 and the pin section 1, and an obtuse angle matching relationship is formed between the bending section 1 and the pushing section 1; In the overlapping relationship between the rebound side spring and the adjacently arranged push side spring, the angle position between the bending section 1 and the pin section 1 is spaced to match the angle position between the bending section 2 and the pin section 2 of the push side spring.

[0014] The above-mentioned technical measures enable the elastic gap of an approximately triangular structure formed by the overlapping arrangement of adjacent positions 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, the rebound side spring piece and the push side spring piece arranged in adjacent positions can be stably overlapped. Even during thrust deformation, the overlapping structure stratification at the elastic gap basically does not occur. The technical effect of the rigidity of the rebound side spring piece at the elastic gap being higher than that of the push side spring piece can also be reliably achieved, so that the guarantee of contact closure under the action of thrust is more stable, and the constraint of the rebound reaction force of the entire moving spring piece when the elastic force is released is more reliable.

[0015] Furthermore, the angle between the bending section 1 and the pin section 1 of the rebound side spring is an arc transition structure; The angle between the bending section 1 and the pushing section 1 of the rebound side spring is an arc transition structure.

[0016] The above technical measures can effectively avoid excessive stress concentration at the corners of the rebound side springs in adjacent arrangements, so that during long-term service, plastic deformation or even breakage of the corners will basically not occur.

[0017] Furthermore, the angle between the bending section 1 and the pin section 1 of the rebound side spring is 110-150°. This technical measure is 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 the overlapping structural stratification phenomenon at the elastic gap during the thrust deformation; if the angle is too large, it will compress the space for the adjacently arranged push side spring to make way 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 overlapping and forming of the dynamic spring. Therefore, while reliably realizing the above-mentioned triangle elastic gap utility function of the adjacent arrangement, this technical measure can enable the rebound side spring and the push side spring to form a stable overlap, which is easy to form, and has a small structural stress during the thrust deformation, which is one of the key technical guarantees for the present invention to achieve the best effect.

[0018] As one of the preferred technical solutions, the pushing side spring piece is integrally formed by the second pin segment, the second bending segment and the second pushing segment; The bending section 2 is an oblique bending transition structure in which the pin section 2 is close to the magnetic circuit part in the relay structure and the push section 2 is far away from the magnetic circuit part in the relay structure, and an obtuse angle matching relationship is formed between the bending section 2 and the pin section 2, and an obtuse angle matching relationship is formed between the bending section 2 and the push section 2; Furthermore, the included angle of the fold between the second bending section and the second pin section of the pushing side spring piece is greater than the included angle of the fold between the first bending section and the first pin section of the rebound side spring piece arranged adjacently.

[0019] The above-mentioned technical measures enable the elastic gap of an approximately triangular structure formed by the overlapping arrangement of adjacent positions 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, the rebound side spring leaf and the push side spring leaf arranged in adjacent positions can be stably overlapped. Even during thrust deformation, the overlapping structure stratification phenomenon at the elastic gap basically does not occur. The technical effect of the rigidity of the push side spring leaf at the elastic gap being lower than that of the rebound side spring leaf can also be reliably achieved, thereby reliably reducing the structural stress of the push side spring leaf during thrust deformation and improving the bendable deformation performance of the push side spring leaf under thrust.

[0020] As one of the preferred technical solutions, in the overlapping relationship between the rebound side spring and the pushing side spring arranged in adjacent positions, one corner of the elastic gap is closed at the angle between the bending section 2 and the pin section 2 of the pushing side spring, and the other corner of the elastic gap is closed at the angle between the bending section 2 and the pushing section 2 of the pushing side spring.

[0021] This technical measure is based on the adjacent arrangement of the double-layer laminate structure 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 stacking of the double-layer laminate structure.

[0022] As one of the preferred technical solutions, the movable reed also has a pin formed separately from the reed body; The pin is connected to the pin connection position of the reed body by riveting, and extends outward from the bottom of the pin section of the reed body in the height direction; In the combined connection structure of the reed body and the pin, the pin is arranged on the side of the reed body facing the magnetic circuit part 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 are used to assemble and fix in the base.

[0023] Furthermore, one end of the pin extends to the elastic gap of the reed body.

[0024] Furthermore, the height of the end of the pin at the elastic gap from the angle between the second bending section of the pushing side spring farthest from the magnetic circuit portion and the second pin section is at most 2 mm.

[0025] 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, and is conducive to increasing the current-carrying area of ​​the pin.

[0026] 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 or in 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.

[0027] 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.

[0028] As one of the preferred technical solutions, the push connection position of the reed body is formed on the first reed closest to the magnetic circuit part in all the reed stacking structures; Push card holes are formed at both side edges of the first spring in the width direction; The remaining spring pieces correspond to the edge regions of the push connection positions on the first spring pieces, are located on the inner side of the corresponding push connection positions, and form a spacing fit with the corresponding push connection positions.

[0029] Furthermore, the remaining reeds except the first reed have a recessed notch 1 that is staggered from the corresponding push connection position and has an edge region corresponding to the push connection position on the first reed.

[0030] 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 connection in the height direction.

[0031] The above technical measures are based on the dynamic spring of the multi-layer stacked structure. On the one hand, the width of the other springs other than the first spring is smaller than the width of the first spring, forming a special-shaped stack of the multi-layer springs, thereby reducing the requirement for the thrust generated by the electromagnetic attraction, and the other springs other than the first spring can also be used to effectively optimize the rebound reaction force of the entire dynamic spring when the elastic force is released; on the other hand, the other springs other than the first spring are used to cooperate with the push card perforation of the edge of the first spring to form a staggered fit of the notch, thereby effectively reducing the requirement for the thrust of the dynamic spring of the multi-layer stacked structure, and effectively avoiding the dynamic spring from deforming under thrust, so that the structural stress distribution of the first spring and other springs is centralized, which greatly reduces the risk of plastic deformation or even fracture of the dynamic spring during thrust deformation.

[0032] Furthermore, the first spring sheet has elastic adjustment steps at both side edges in the width direction, which are located between the pin connection position and the elastic gap and are concave in the shape of a step; The remaining reeds except the first reed correspond to the edge area of ​​the elastic adjustment step on the first reed, are located on the inner side of the corresponding elastic adjustment step, and form a spacing match with the corresponding elastic adjustment step.

[0033] Furthermore, the remaining reeds except the first reed have a second paving notch with a concave structure and staggered with the corresponding elastic adjustment step, corresponding to the edge area of ​​the elastic adjustment step on the first reed.

[0034] 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.

[0035] The above technical measures are based on a dynamic spring with a multi-layer laminated structure, so that other springs are used to cooperate with the elastic adjustment structure of the edge of the first spring, forming a staggered fit with a gap. On the one hand, it is beneficial to ensure that the elastic adjustment structure of the first spring can exert its effectiveness. On the other hand, it effectively avoids the dynamic spring from being deformed by thrust, so that the structural stress distribution of the first spring and other springs is concentrated, which greatly reduces the risk of plastic deformation or even fracture of the dynamic spring during thrust deformation.

[0036] Furthermore, the width of the remaining reeds except the first reed at least at the pushing section is smaller than the width of the first reed at the corresponding position. This technical measure enables the other reeds to overlap with the first reed in the width direction, thereby reducing the technical requirements for the thrust generated by the electromagnetic attraction, and can also effectively optimize the rebound reaction force of the entire moving reed when the elastic force is released through the other reeds.

[0037] Furthermore, the pin section of the first spring sheet is provided with an elastic adjustment hole 1 located at the top side of the pin connection position in the height direction; Furthermore, the pushing section of the first spring sheet is provided with a second elastic adjustment hole located in the middle of the pushing connection position in the width direction.

[0038] The above technical measures can reduce the elastic reaction force of the first spring piece to restrain the rebound reaction force of the movable spring piece when the elastic force is released, and effectively reduce the risk of causing arcing and secondary conduction.

[0039] As one of the preferred technical solutions, the reed body is a structure in which two reeds are overlapped in the thickness direction.

[0040] Furthermore, the two spring leaves of the spring body are overlapped in an integrated bending structure, and the overlapping bending position is located at the top of the contact connection position in the height direction.

[0041] The above technical measures make it easy to realize the double-layer laminated dynamic spring. 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. On the fourth hand, it is conducive to the simple and rapid automated forming of the dynamic spring with a double laminated structure.

[0042] 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 movable spring assembly constituting the contact portion has any of the movable spring leaf structures described above.

[0043] Furthermore, the push rod type relay is a normally open structure; The magnetic circuit of the normally open push rod relay is mainly composed of a coil frame, an iron core, a coil, a yoke and an armature assembled on the base; The contact part of the normally open push rod relay is mainly composed of a moving spring assembly and a normally open static spring assembly assembled on the base, the arrangement position of the moving spring assembly is close to the magnetic circuit part, and the arrangement position of the normally open static spring assembly is far away from the magnetic circuit part; The magnetic circuit part and the contact part of the normally open push rod relay are arranged on the base in a left-right position through a push card; The push card is located between the armature and the dynamic spring assembly; Alternatively, the push rod relay is a conversion type structure; The magnetic circuit of the conversion push rod relay is mainly composed of a coil frame, an iron core, a coil, a yoke and an armature assembled on the base; The contact part of the conversion push rod relay is mainly composed of a normally closed static spring assembly, a dynamic spring assembly and a normally open static spring assembly assembled on the base, the dynamic spring assembly is arranged between the normally closed static spring assembly and the normally open static spring assembly, the normally closed static spring assembly is arranged close to the magnetic circuit part, and the normally open static spring assembly is arranged far away from the magnetic circuit part; The magnetic circuit part and the contact part of the conversion push rod relay are arranged on the base in a left-right position through a push card; The push card is located between the armature and the dynamic spring assembly.

[0044] Alternatively, the push rod type relay is a normally closed structure; The magnetic circuit of the normally closed push rod relay is mainly composed of a coil frame, an iron core, a coil, a yoke and an armature assembled on the base; The contact part of the normally closed push rod relay is mainly composed of a moving spring assembly and a normally closed static spring assembly assembled on the base, the arrangement position of the moving spring assembly is far away from the magnetic circuit part, and the arrangement position of the normally closed static spring assembly is close to the magnetic circuit part; The magnetic circuit part and the contact part of the normally closed push rod relay are arranged on the base in a left-right position through a push card; The push card is located between the armature and the dynamic spring assembly.

[0045] The movable spring assembly of the above-mentioned push rod type relay is formed with the above-mentioned movable spring sheet as the base, so it has the corresponding technical effect brought by the above-mentioned movable spring sheet, which 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, and is conducive to forming dimensionality reduction competition in the market, and has a good market prospect.

[0046] The beneficial technical effect of the present invention is: the above technical measures aim at the particularity of the above push rod type relay to adapt to the high current working environment, forming a multi-layer superimposed structure large current carrying dynamic spring, which has a small structural stress in the thrust deformation, so that the formed push rod type relay can basically maintain the original electromagnetic suction design to achieve high current carrying performance, 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 of the magnetic circuit part and the overall structural size, and thus conducive to the formation of dimensionality reduction competition in the market for the formed push rod type relay. In the above technical measures, the elastic properties of the dynamic spring are easy to adjust in a targeted and adaptive manner, and can also effectively reduce the risk of plastic deformation or even fracture of the dynamic spring in repeated thrust deformation, and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of the movable spring of the present invention.

[0048] Figure 2 for Figure 1 Schematic diagram of the structure of the middle reed body.

[0049] Figure 3 for Figure 2 A partial enlarged view of the .

[0050] Figure 4 for Figure 2 Right view of .

[0051] Figure 5 for Figure 4 Schematic diagram of the structure of the rebound side spring ( Figure 2 to the left of the .

[0052] Figure 6 for Figure 4Schematic diagram of the structure of the push side spring ( Figure 2 direction of the right side).

[0053] Figure 7 This is a screenshot of a simulation comparison between the dynamic spring of the present invention and dynamic springs of other structural forms.

[0054] Figure 8 It is a structural schematic diagram of the push rod type relay of the present invention.

[0055] Fig. 9 Another structural schematic diagram of the push rod type relay of the present invention.

[0056] Fig.10 Another schematic diagram of the structure of the movable reed of the present invention (only the reed body is shown).

[0057] Fig.11 for Fig.10 A partial enlarged view of the .

[0058] Meanings of the codes in the figure: 1—reed body; 11´—first reed; 11—rebound side 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; 12—pushing side 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´—third reed; 13—elastic gap; 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

[0059] The present invention relates to the field of relay technology, and in particular to a high-load current reed and a push rod type relay comprising the same. 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 , Figure 6 , Figure 7 and Figure 8 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 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Fig. 9 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, Fig.10 and Fig.11 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.

[0060] 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.

[0061] Example 1 See also Figure 8 As shown, the push rod relay of the present invention is a normally open push rod relay, which 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 normally open static spring assembly 8 etc. assembled on the base 3. Among them, the magnetic circuit part composed of the iron core, the coil 4, the yoke 5 and the armature 6 etc. arranged at the coil frame on the base 3 and the contact part composed of the moving spring assembly and the normally open static spring assembly 8 etc. on the base 3 form a left-right arrangement relationship on the base 3, and the push card 7 is located between the armature 6 and the moving spring assembly. The armature 6 turned over on the yoke 5 pushes the push card 7 to make the contact part conductive, or the disconnected contact part pushes the push card 7 to make the armature 6 turn over on the yoke 5. In the aforementioned push rod type relay, the arrangement position of the moving spring assembly 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. The moving spring assembly is bent and deformed under the push of the push card 7 to attract the conductive contact part, and the moving spring assembly is elastically released to disconnect the contact part. Figure 8 The figure also shows the bending direction (i.e. the pushing direction) of the dynamic spring assembly when it is pushed by the pushing card 7, and the rebound movement direction (i.e. the rebound direction) of the dynamic spring assembly after the elasticity is released.

[0062] The normally open static spring assembly 8 (usually, the normally open and normally closed states refer to the double static spring assemblies present in the relay, and the attraction / disconnection action of the dynamic spring assembly is switched between the normally open static spring assembly and the normally closed static spring assembly; since the above-mentioned relay has only one set of static spring assemblies, the static spring assembly described below in this embodiment refers to the normally open static spring assembly 8) is composed of a static spring sheet and a static contact.

[0063] The movable spring assembly is composed of a movable spring piece and a movable contact as described below.

[0064] In order to be suitable for high current working conditions, the dynamic spring leaf of the above-mentioned dynamic spring assembly and the static spring leaf of the static spring assembly 8 are relatively thicker than ordinary dynamic spring leaves and static spring leaves, so as to increase the current-carrying area, reduce the current density in the spring leaf during service, and thus reduce the heating phenomenon of the spring leaf, thereby achieving the technical effect of low temperature rise.

[0065] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 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.

[0066] In order to adapt to large current carrying and as low thrust as possible, the spring body 1 is a superimposed structure in the thickness direction of the rebound side spring 11 (the side close to the magnetic circuit part in the relay structure, that is, the first spring 11') and the push side spring 12 (the side close to the normally open static spring assembly in the relay structure, that is, the second spring 12'). In order to make the superimposed structure low-cost, easy and high-quality, the rebound side spring 11 and the push side spring 12 of the spring body 1 are an integrated 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.

[0067] In the above-mentioned superimposed structure, the spring sheet 11 on the rebound side is integrally formed by the pin section 111, the bending section 112 and the pushing section 113. Among them, the pin section 111 is used as a combined connecting pin 2. The bending section 112 causes the pin section 111 and the pushing section 113 to bend and dislocate in the thickness direction of the spring sheet body 1, so as to form the elastic gap 13 described below, and to produce corresponding bending deformation in cooperation with the release of thrust or elastic force in service. The pushing section 113 is used as a connection position for arranging the push card, that is, the push card through hole 17, and as a connection position for arranging the moving contact. The pushing section 113 is also the main part that produces corresponding bending deformation in cooperation with the release of thrust or elastic force in service.

[0068] Under the bending influence of the above-mentioned bending section 112, the pin section 111 of the rebound side spring piece 11 is close to the magnetic circuit part in the relay structure, and the push 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 push 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 push section 113 also form an obtuse angle matching relationship. In order to avoid stress concentration at the bending part of the rebound side 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 push section 113 is also a circular arc transition structure. As a key part for cooperating with the side 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.).

[0069] In the above-mentioned superimposed structure, the push-side spring 12 is integrally formed by the pin segment 2 121, the bending segment 2 122 and the pushing segment 2 123. Among them, the pin segment 2 121 is used to cooperate with the above-mentioned pin segment 1 111 to combine the connecting pin 2. The bending segment 2 122 causes the pin segment 2 121 and the pushing segment 2 123 to be bent and misaligned in the thickness direction of the spring body 1, so as to form the elastic gap 13 described below, and to produce corresponding bending deformation in cooperation with the release of thrust or elastic force in service. The pushing segment 2 123 is used to arrange the connection position of the push card in cooperation with the above-mentioned pushing segment 2 123, and is used to arrange the connection position of the moving contact. The pushing segment 2 123 is also the main part that produces corresponding bending deformation in cooperation with the release of thrust or elastic force in service.

[0070] Under the bending influence of the above-mentioned bending section 2 122, the pin section 2 121 of the push side 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 push side 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 rebound side spring piece 11 of the above structure and the push side spring piece 12 of the above structure, the angle position between the bending section 1 112 of the rebound side spring piece 11 and the pin section 1 111 is higher than the angle position between the bending section 2 122 of the push side 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 push side spring piece 12 and the pin section 2 121 is greater than the angle between the bending section 1 112 of the rebound side spring piece 11 and the pin section 1 111. In the overlapping relationship between the rebound side spring piece 11 of the above structure and the push side spring piece 12 of the above structure, the angle position between the bending section 2 122 of the push side spring piece 12 and the push section 2 123 basically coincides with the angle position between the bending section 1 112 of the rebound side spring piece 11 and the push section 1 113. In this way, an elastic gap 13 is formed between the rebound side spring 11 and the pushing side spring 12 of the overlapping structure spring body 1, which is located between the pin connection position and the pushing connection position, arranged obliquely, and basically has a triangular structure. One corner of the elastic gap 13 is closed at the corner between the bending section 2 122 of the pushing side spring 12 and the pin section 2 121 due to the overlapping relationship, and the other corner of the elastic gap 13 is closed at the corner between the bending section 2 122 and the pushing section 2 123 of the pushing side spring 12 due to the overlapping relationship. It is also based on this approximately triangular elastic gap 13 that the bent section 2 122 of the pushing side spring piece 12 constitutes a bottom edge of the elastic gap 13 which is arranged obliquely, and the bent section 112 of the rebound side spring piece 11 and part of the pin section 111 close to the bent section 112 constitute 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, and the two waist edges constitute an obtuse angle matching relationship as required above.

[0072] The specific triangular elastic gap 13 formed between the rebound side spring piece 11 and the push side spring piece 12 in the above-mentioned overlapping relationship forms a waist edge due to the bending of the rebound side spring piece 11, which forms a clearance space for the push side spring piece 12 in service when it deforms in accordance with the thrust, thereby reducing the mutual interference of their structural stresses during extrusion, so that the bending deformation performance of the dynamic spring piece of the overlapping structure is better. At the same time, the pushing side spring piece 12 is matched to form a bending angle greater than the bending angle of the rebound side spring piece 11 at the corresponding bending position, which effectively improves the performance of the pushing side spring piece 12 in adapting to bending deformation under the action of thrust, and basically does not cause a reaction force of thrust deformation to the rebound side spring piece 11, and has good compliance, which effectively reduces the structural stress of the entire moving spring piece during thrust deformation, so that the formed push rod type 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 is basically not increased, thereby meeting the high current-carrying technical requirements while avoiding upgrading the design of the magnetic circuit part and the overall structural size as much as possible. Of course, the two waist angle structures of the above-mentioned rebound side spring piece 11 at the elastic gap 13 will produce a certain rigid support when bending, that is, the structural rigidity of the rebound side spring piece 11 compared with the pushing side spring piece 12 is enhanced, so that the guarantee of contact closure under the thrust is more stable, 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.

[0073] When the reed body 1 of the above structure is used in a relay, it needs to be assembled with the push card, so there is a push connection position, that is, a push card through hole 117, on the reed body 1. In the superimposed structure of the above reed body 1, in order to adapt to the elastic force adjustment, it is not appropriate to set the rebound side reed 11 and the push side reed 12 to have the same width, so the width of the push side reed 12 is designed to be smaller than the width of the rebound side reed 11, so that the push side reed 12 can effectively optimize the rebound reaction force of the entire moving reed when the elastic force is released, and reduce the technical requirements for the thrust generated by the electromagnetic attraction. 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 to form the push card through hole 117, the width of the spring leaf 11 on the rebound side is greater than the width of the spring leaf 12 on the push side, and the area where the push section is used to form the contact assembly hole is set with equal width to ensure the stability of the moving contact assembly; in the area where the pin section is used to form the elastic adjustment step 114, the width of the spring leaf 11 on the rebound side is greater than the width of the spring leaf 12 on the push side. It can be seen that the push card through hole 117 of the spring body 1 is actually formed at the two side edges of the spring leaf 11 on the rebound side in the width direction, and is formed in a C-shaped profile structure with an opening facing outward; the elastic adjustment step 114 of the spring body 1 is actually formed at the two side edges of the spring leaf 11 on the rebound side in the width direction, and is formed in a step concave structure with a relatively wide lower side and a relatively narrow upper side, and the elastic adjustment step 114 is specifically located at the pin connection position and the elastic gap 13 of the spring body 1.

[0074] The above-mentioned rebound side spring piece 11 with the push card through hole 117 and the elastic adjustment step 114 has a phenomenon of relatively concentrated stress because the push card through hole 117 and the elastic adjustment step 114 are concavely formed at the corresponding edges of the rebound side 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 recess 124 with a concave structure and staggered from the corresponding push card through hole 117 is formed in the edge area of ​​the above-mentioned push side spring 12 corresponding to the push card through hole 117 on the rebound side spring 11, so that the edge area of ​​the push side spring 12 corresponding to the push card through hole 117 on the rebound side 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; the edge area of ​​the above-mentioned push side spring 12 corresponding to the elastic adjustment step 114 on the rebound side spring 11 is formed with a recess 2 125 with a concave structure and staggered from the corresponding elastic adjustment step 114, so that the edge area of ​​the push side spring 12 corresponding to the elastic adjustment step 114 on the rebound side 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.

[0075] Regarding the above-mentioned clearance notch 124 on the push side 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 push side 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 push side spring piece 12 match the corresponding C-shaped push card through hole 117 on the rebound side spring piece 11 with a rectangular structure similar to a sunken groove.

[0076] Regarding the second clearance notch 125 on the push side spring piece 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 contour structure. Therefore, the second clearance notch 125 on the push side spring piece 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 push side spring piece 12 match the corresponding step-type elastic adjustment step 114 on the rebound side spring piece 11 with a rectangular structure similar to a sunken groove.

[0077] On the basis of the above-mentioned spring body 1, in order to reduce the elastic reaction force of the rebound side spring 11 and to constrain the rebound reaction force of the movable spring when the elastic force is released, an elastic adjustment hole 115 is provided in the pin section 111 of the rebound side 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 116 is provided in the push section 113 of the rebound side spring 11, which is located in the middle of the push card through hole 117 in the width direction.

[0078] The reed body 1 of the above structure is provided with a riveting hole for combining and connecting the pin 2 at its pin section, i.e., the pin connection position, which penetrates the spring leaf 11 on the rebound side and the spring leaf 12 on the push side 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 riveting, 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 spring leaf 11 on the rebound side and the pin section 111, and the angle between the bending section 2 122 of the push side spring leaf 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.

[0079] See also Figure 7 As shown, the reed body 1 (shown by serial number a) with an elastic gap 13 having an approximately obtuse triangle structure as above is compared with the reed body (shown by serial number b) with an elastic gap having an approximately right triangle structure, the reed body (shown by serial number c) with an elastic gap having an approximately semicircular structure, and the reed body (shown by serial number d) with an elastic gap having an approximately parallelogram structure under the same thrust conditions, in a stress simulation. Through the simulation comparison, it is found that the reed body with an elastic gap of an approximately right-angled triangle structure as shown in serial number b will undergo obvious overlapping structural stratification during thrust deformation; the reed body with an elastic gap of an approximately semicircular structure as shown in serial number c has a stress of approximately 714.11 at the push connection position; the reed body with an elastic gap of an approximately parallelogram structure as shown in serial number d has a slight overlapping stratification phenomenon during thrust deformation, and the stress at the push connection position is approximately 786.61; on the other hand, the present invention as shown in serial number a does not undergo overlapping stratification during thrust deformation, and the stress at the push connection position is approximately 672.33, which is significantly lower than the structures shown in the aforementioned serial numbers c and d, and has obvious advantages.

[0080] Example 2 See also Fig. 9As shown, the push rod type relay of the present invention is a conversion type structure, which 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.

[0081] 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, the normally open static spring assembly 8 and the 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 located 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.

[0082] 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 make the normally open contact of the contact part conductive and the normally closed contact disconnected; or, when the elasticity of the movable spring assembly is released, the normally open contact of the contact part is disconnected and the normally closed contact is conductive, and the movable spring assembly of the contact part pushes the push card 7 to make the armature 6 flip 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 of the contact movable spring assembly, and is located in the bifurcation space of the push card 7 at one end of the contact movable spring assembly; and, the bifurcation depth of the push card at one end of the contact 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.

[0083] The normally open static spring assembly 8 is composed of corresponding static spring pieces and static contacts.

[0084] The normally closed static spring assembly 9 is composed of corresponding static spring pieces and static contacts.

[0085] The movable spring assembly is composed of a movable spring piece and a movable contact as described below.

[0086] In order to be suitable for high current working conditions, the dynamic spring leaf of the above-mentioned dynamic spring assembly and the static spring leaf of the normally open static spring assembly 8 are relatively thicker than ordinary dynamic spring leaves and static spring leaves, so as to increase the current-carrying area, reduce the current density in the spring leaf during service, and thereby reduce the heating phenomenon of the spring leaf, thereby achieving the technical effect of low temperature rise.

[0087] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the movable spring sheet used in the above-mentioned movable spring assembly has a spring sheet body 1 and a pin 2 which are assembled and connected together 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 stacking layer, that is, the direction of the push card; the width direction involved refers to the direction transverse to the push card. In addition, the expression of the push side spring sheet 12 involved in the following embodiment is based on the normally open static spring assembly 8 in the push direction as a reference, and has nothing to do with the normally closed static spring assembly 9.

[0088] In order to adapt to large current carrying and as low thrust as possible, the spring body 1 is a superimposed structure of a rebound side spring 11 (the side adjacent to the magnetic circuit part in the relay structure, i.e., the first spring 11') and a push side spring 12 (the side adjacent to the normally open static spring assembly 8 in the relay structure, i.e., the second spring 12') in the thickness direction. In order to make the superimposed structure low-cost, easy and high-quality, the rebound side spring 11 and the push side spring 12 of the spring body 1 are an integrated 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.

[0089] In the above-mentioned superimposed structure, the spring sheet 11 on the rebound side is integrally formed by the pin section 111, the bending section 112 and the pushing section 113. Among them, the pin section 111 is used as a combined connecting pin 2. The bending section 112 causes the pin section 111 and the pushing section 113 to bend and dislocate in the thickness direction of the spring sheet body 1, so as to form the elastic gap 13 described below, and to produce corresponding bending deformation in cooperation with the release of thrust or elastic force in service. The pushing section 113 is used as a connection position for arranging the push card, that is, the push card through hole 17, and as a connection position for arranging the moving contact. The pushing section 113 is also the main part that produces corresponding bending deformation in cooperation with the release of thrust or elastic force in service.

[0090] Under the bending influence of the above-mentioned bending section 112, the pin section 111 of the rebound side spring piece 11 is close to the magnetic circuit part in the relay structure, and the push section 113 is far away from the magnetic circuit part in the relay structure (close to the normally open static spring component 8). 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 push 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 push section 113 also form an obtuse angle matching relationship. In order to avoid stress concentration at the bending part of the rebound side 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 push section 113 is also a circular arc transition structure. As a key part for cooperating with the side 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.).

[0091] In the above-mentioned superimposed structure, the push-side spring 12 is integrally formed by the pin segment 2 121, the bending segment 2 122 and the pushing segment 2 123. Among them, the pin segment 2 121 is used to cooperate with the above-mentioned pin segment 1 111 to combine the connecting pin 2. The bending segment 2 122 causes the pin segment 2 121 and the pushing segment 2 123 to be bent and misaligned in the thickness direction of the spring body 1, so as to form the elastic gap 13 described below, and to produce corresponding bending deformation in cooperation with the release of thrust or elastic force in service. The pushing segment 2 123 is used to arrange the connection position of the push card in cooperation with the above-mentioned pushing segment 2 123, and is used to arrange the connection position of the moving contact. The pushing segment 2 123 is also the main part that produces corresponding bending deformation in cooperation with the release of thrust or elastic force in service.

[0092] Under the bending influence of the above-mentioned bending section 2 122, the pin section 2 121 of the push side 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 normally open static spring component 8) 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 push side 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.

[0093] In the overlapping relationship between the rebound side spring piece 11 of the above structure and the push side spring piece 12 of the above structure, the angle position between the bending section 1 112 of the rebound side spring piece 11 and the pin section 1 111 is higher than the angle position between the bending section 2 122 of the push side 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 push side spring piece 12 and the pin section 2 121 is greater than the angle between the bending section 1 112 of the rebound side spring piece 11 and the pin section 1 111. In the overlapping relationship between the rebound side spring piece 11 of the above structure and the push side spring piece 12 of the above structure, the angle position between the bending section 2 122 of the push side spring piece 12 and the push section 2 123 basically coincides with the angle position between the bending section 1 112 of the rebound side spring piece 11 and the push section 1 113. In this way, an elastic gap 13 is formed between the rebound side spring 11 and the pushing side spring 12 of the overlapping structure spring body 1, which is located between the pin connection position and the pushing connection position, arranged obliquely, and basically has a triangular structure. One corner of the elastic gap 13 is closed at the corner between the bending section 2 122 of the pushing side spring 12 and the pin section 2 121 due to the overlapping relationship, and the other corner of the elastic gap 13 is closed at the corner between the bending section 2 122 and the pushing section 2 123 of the pushing side spring 12 due to the overlapping relationship. It is also based on this approximately triangular elastic gap 13 that the bent section 2 122 of the pushing side spring piece 12 constitutes a bottom edge of the elastic gap 13 which is arranged obliquely, and the bent section 112 of the rebound side spring piece 11 and part of the pin section 111 close to the bent section 112 constitute 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, and the two waist edges constitute an obtuse angle matching relationship as required above.

[0094] The specific triangular elastic gap 13 formed between the rebound side spring piece 11 and the push side spring piece 12 in the above-mentioned overlapping relationship forms a waist edge due to the bending of the rebound side spring piece 11, which forms a clearance space for the push side spring piece 12 in service when it deforms in accordance with the thrust, thereby reducing the mutual interference of their structural stresses during extrusion, so that the bending deformation performance of the dynamic spring piece of the overlapping structure is better. At the same time, the pushing side spring piece 12 is matched to form a bending angle greater than the bending angle of the rebound side spring piece 11 at the corresponding bending position, which effectively improves the performance of the pushing side spring piece 12 in adapting to bending deformation under the action of thrust, and basically does not cause a reaction force of thrust deformation to the rebound side spring piece 11, and has good compliance, which effectively reduces the structural stress of the entire moving spring piece during thrust deformation, so that the formed push rod type 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 is basically not increased, thereby meeting the high current-carrying technical requirements while avoiding upgrading the design of the magnetic circuit part and the overall structural size as much as possible. Of course, the two waist angle structures of the above-mentioned rebound side spring piece 11 at the elastic gap 13 will produce a certain rigid support when bending, that is, the structural rigidity of the rebound side spring piece 11 compared with the pushing side spring piece 12 is enhanced, so that the guarantee of contact closure under the thrust is more stable, 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.

[0095] When the reed body 1 of the above structure is used in a relay, it needs to be assembled with the push card, so there is a push connection position, that is, a push card through hole 117, on the reed body 1. In the superimposed structure of the above reed body 1, in order to adapt to the elastic force adjustment, it is not appropriate to set the rebound side reed 11 and the push side reed 12 to have the same width, so the width of the push side reed 12 is designed to be smaller than the width of the rebound side reed 11, so that the push side reed 12 can effectively optimize the rebound reaction force of the entire moving reed when the elastic force is released, and reduce the technical requirements for the thrust generated by the electromagnetic attraction. 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 to form the push card through hole 117, the width of the spring leaf 11 on the rebound side is greater than the width of the spring leaf 12 on the push side, and the area where the push section is used to form the contact assembly hole is set with equal width to ensure the stability of the moving contact assembly; in the area where the pin section is used to form the elastic adjustment step 114, the width of the spring leaf 11 on the rebound side is greater than the width of the spring leaf 12 on the push side. It can be seen that the push card through hole 117 of the spring body 1 is actually formed at the two side edges of the spring leaf 11 on the rebound side in the width direction, and is formed in a C-shaped profile structure with an opening facing outward; the elastic adjustment step 114 of the spring body 1 is actually formed at the two side edges of the spring leaf 11 on the rebound side in the width direction, and is formed in a step concave structure with a relatively wide lower side and a relatively narrow upper side, and the elastic adjustment step 114 is specifically located at the pin connection position and the elastic gap 13 of the spring body 1.

[0096] The above-mentioned rebound side spring piece 11 with the push card through hole 117 and the elastic adjustment step 114 has a phenomenon of relatively concentrated stress because the push card through hole 117 and the elastic adjustment step 114 are concavely formed at the corresponding edges of the rebound side 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 recess 124 with a concave structure and staggered from the corresponding push card through hole 117 is formed in the edge area of ​​the above-mentioned push side spring 12 corresponding to the push card through hole 117 on the rebound side spring 11, so that the edge area of ​​the push side spring 12 corresponding to the push card through hole 117 on the rebound side 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; the edge area of ​​the above-mentioned push side spring 12 corresponding to the elastic adjustment step 114 on the rebound side spring 11 is formed with a recess 2 125 with a concave structure and staggered from the corresponding elastic adjustment step 114, so that the edge area of ​​the push side spring 12 corresponding to the elastic adjustment step 114 on the rebound side 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.

[0097] Regarding the above-mentioned clearance notch 124 on the push side 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 push side 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 push side spring piece 12 match the corresponding C-shaped push card through hole 117 on the rebound side spring piece 11 with a rectangular structure similar to a sunken groove.

[0098] Regarding the second clearance notch 125 on the push side spring piece 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 contour structure. Therefore, the second clearance notch 125 on the push side spring piece 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 push side spring piece 12 match the corresponding step-type elastic adjustment step 114 on the rebound side spring piece 11 with a rectangular structure similar to a sunken groove.

[0099] On the basis of the above-mentioned spring body 1, in order to reduce the elastic reaction force of the rebound side 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 in the pin section 111 of the rebound side 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 116 is provided in the push section 113 of the rebound side spring 11, which is located in the middle of the push card through hole 117 in the width direction.

[0100] The reed body 1 of the above structure is provided with a riveting hole for combining and connecting the pin 2 at its pin section, i.e., the pin connection position, which penetrates the spring leaf 11 on the rebound side and the spring leaf 12 on the push side 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 riveting, 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 spring leaf 11 on the rebound side and the pin section 111, and the angle between the bending section 2 122 of the push side spring leaf 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.

[0101] Example 3 The rest of the content of this embodiment is the same as that of Embodiment 1 or Embodiment 2, 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.

[0102] Example 4 The rest of the content of this embodiment is the same as that of Embodiment 1 or Embodiment 2, 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.

[0103] Example 5 The rest of the content of this embodiment is the same as that of Embodiment 1 or Embodiment 2, except that: The second clearance notch of the push-side spring at the pin section is designed as a C-shaped profile structure and surrounded by the inner periphery of the elastic adjustment step.

[0104] Example 6 The rest of the content of this embodiment is the same as that of Embodiment 1 or Embodiment 2, except that: Remove the second clearance notch at the spring pin segment on the push side.

[0105] Of course, its effect of improving stress concentration will also be reduced due to its removal.

[0106] Example 7 The rest of the content of this embodiment is the same as that of Embodiment 1 or Embodiment 2, except that: Remove elasticity adjustment hole 1 and / or elasticity adjustment hole 2 on the rebound side spring.

[0107] Of course, its effect of adjusting the elastic properties of the rebound-side spring will also be eliminated by its removal.

[0108] Example 8 The rest of the content of this embodiment is the same as that of Embodiment 1 or Embodiment 2, except that: Remove the clearance notch 1 of the push side spring at the push section to make it match the push card perforation of the rebound side spring.

[0109] Of course, its effect of improving stress concentration will be reduced due to its removal, but at least the thrust will be increased.

[0110] 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.

[0111] See also Fig.10 and Fig.11 As shown (the viewing angle in the horizontal and wide direction can be seen in Figure 4 , Figure 5 and Figure 6 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 13' in the thickness direction. The first spring 11' is located on one side of the relay structure adjacent to the magnetic circuit portion. The third spring 13' is located on one side of the relay structure adjacent to the normally open static spring assembly 8. The second spring 12' is located between the first spring 11' and the third spring 13'.

[0112] In the above-mentioned three-layer laminated spring body 1, the first spring 11' and the second spring 12' are arranged adjacent to each other, and a specific triangular structure elastic gap 13 is formed between the two; the second spring 12' and the third spring 13' are arranged adjacent to each other, and a specific triangular structure elastic gap 13 is formed between the two. Therefore, for the sake of clear description, the first spring 11', the second spring 12' and the third spring 13' are divided into two groups according to adjacent positions in the thickness direction based on the specific triangular structure elastic gap 13, that is, the first group of adjacent positions is composed of the first spring 11' and the second spring 12', and the second group of adjacent positions is composed of the second spring 12' and the third spring 13'.

[0113] 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, and the second reed 12' is arranged relatively far away from the magnetic circuit part and close to the normally open static spring assembly. Therefore, in order to compare the description structure of the reed body in the above-mentioned embodiments 1 and 2, the first reed 11' is defined as a rebound side reed in the first group of adjacent positions, and the second reed 12' is defined as a push side reed in the first group of adjacent positions.

[0114] In the first group of adjacent overlapping structures, the spring sheet on the rebound side is integrally formed by the pin section 1, the bending section 1 and the pushing section 1. Among them, the pin section 1 is used as a combined connecting pin. The bending section 1 causes the pin section 1 and the pushing section 1 to bend and dislocate in the thickness direction of the spring sheet body, so as to form the elastic gap 13 described below, and to produce corresponding bending deformation in cooperation with the release of thrust or elastic force in service. The pushing section 1 is used as a connection position for arranging the push card, that is, the push card perforation, and as a connection position for arranging the moving contact. The pushing section 1 is also the main part for producing corresponding bending deformation in cooperation with the release of thrust or elastic force in service.

[0115] Under the bending influence of the above-mentioned bending section 1, the pin section 1 of the rebound side spring is close to the magnetic circuit part in the relay structure, and the push section 1 is far away from the magnetic circuit part in the relay structure (close to the normally open static spring assembly). 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 1 is an oblique bending transition structure in which the pin section 1 is close to the magnetic circuit part in the relay structure, and the push section 1 is far away from the magnetic circuit part in the relay structure, that is, the bending section 1 and the pin section 1 form an obtuse angle matching relationship, and the bending section 1 and the push section 1 also form an obtuse angle matching relationship. In order to avoid stress concentration at the bending part of the rebound side spring, it is required that the bending angle between the bending section 1 and the pin section 1 is a circular arc transition structure, and the bending angle between the bending section 1 and the push section 1 is also a circular arc transition structure. As a key part for cooperating with the side spring to produce bending deformation and constrain elastic release reaction force, the angle between the aforementioned bending section 1 and the pin section 1 is reasonably selected within the range of 110 to 150° (for example, 110°, 120°, 130°, 140° or 150°, etc.).

[0116] In the superimposed structure of the first group of adjacent positions, the push-side spring piece is integrally formed by the pin segment 2, the bending segment 2 and the pushing segment 2. Among them, the pin segment 2 is used to cooperate with the pin segment 1 to combine the connecting pins. The bending segment 2 causes the pin segment 2 and the pushing segment 2 to be bent and misaligned in the thickness direction of the spring body, so as to form the elastic gap 13 described below, and to produce corresponding bending deformation in cooperation with the release of thrust or elastic force during service. The pushing segment 2 is used to cooperate with the above-mentioned pushing segment 2 to arrange the connection position of the push card, and is used to arrange the connection position of the moving contact. The pushing segment 2 is also the main part that produces corresponding bending deformation in cooperation with the release of thrust or elastic force during service.

[0117] Under the influence of the bending of the above-mentioned bending section 2, the pin section 2 of the push side spring piece is close to the magnetic circuit part in the relay structure, and the push section 2 is far away from the magnetic circuit part in the relay structure (close to the normally open static spring component). 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 is an oblique bending transition structure in which the pin section 2 is close to the magnetic circuit part in the relay structure and the push section 2 is far away from the magnetic circuit part in the relay structure, that is, the bending section 2 and the pin section 2 form an obtuse angle matching relationship, and the bending section 2 and the push section 2 also form an obtuse angle matching relationship. In order to avoid stress concentration at the bending part of the push side spring piece, it is required that the angle between the bending section 2 and the pin section 2 is a circular arc transition structure, and the angle between the bending section 2 and the push section 2 is also a circular arc transition structure.

[0118] In the overlapping relationship between the first group of adjacent positions of the rebound side spring piece of the above structure and the push side spring piece of the above structure, the angle position between the bending section 1 of the rebound side spring piece and the pin section 1 is higher than the angle position between the bending section 2 of the push side spring piece and the pin section 2, and the angles of the two positions form a spacing match in the height direction; moreover, the angle between the bending section 2 of the push side spring piece and the pin section 2 is higher than the angle between the bending section 1 of the rebound side spring piece and the pin section 1. In the overlapping relationship between the rebound side spring piece of the above structure and the push side spring piece of the above structure, the angle position between the bending section 2 of the push side spring piece and the push section 2 basically coincides with the angle position between the bending section 1 of the rebound side spring piece and the push section 1. Thus, in the first group of adjacent overlapping structures, an elastic gap 13 is formed between the rebound side spring and the push side spring, which is located between the pin connection position and the push connection position, arranged obliquely, and is basically in a triangular structure. One corner of the elastic gap 13 is closed at the angle between the bending section 2 of the push side spring and the pin section 2 due to the overlapping relationship, and the other corner of the elastic gap 13 is closed at the angle between the bending section 2 of the push side spring and the push section 2 due to the overlapping relationship. It is also based on this approximately triangular elastic gap 13 that the bending section 2 of the push side spring constitutes a bottom edge of the elastic gap 13 arranged obliquely, and the bending section 1 of the rebound side spring and part of the pin section 1 near the bending section 1 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.

[0119] The elastic gap 13 of the specific triangular structure formed between the first group of adjacent overlapping relationship of the rebound side spring and the push side spring, due to the waist formed by the bending of the rebound side spring, forms a space for the push side spring in service to deform in accordance with the thrust, reduces the mutual interference of their structural stresses during extrusion, and makes the bending deformation performance of the dynamic spring of the overlapping structure better. At the same time, the push side spring forms a matching relationship with a bending angle greater than the bending angle of the rebound side spring at the corresponding bending position, effectively improving the performance of the push side spring in adapting to bending deformation under the action of thrust, and basically does not cause a reaction force of thrust deformation to the rebound side spring, and has good compliance, which effectively reduces the structural stress of the entire dynamic spring in thrust deformation, making the formed push rod relay as small as possible, and basically maintaining the original electromagnetic attraction design to achieve the thrust required for contact closure. It can be seen that while the current carrying performance is improved, the electromagnetic attraction of the magnetic circuit part is basically not 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 above-mentioned rebound side spring at the elastic gap 13 will produce a certain rigid support when bending, that is, the structural rigidity of the rebound side spring compared to the pushing side spring is enhanced, so that the guarantee of contact closure under the thrust is more stable, and the rebound reaction force of the entire moving spring 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.

[0120] According to the above grouping, the second reed 12' and the third reed 13' 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, and the third reed 13' is arranged relatively far away from the magnetic circuit part and close to the normally open static spring assembly. Therefore, in order to compare the description structure of the reed body in the above-mentioned embodiments 1 and 2, the second reed 12' is defined as a rebound side reed in the second group of adjacent positions, and the third reed 13' is defined as a push side reed in the second group of adjacent positions.

[0121] In the second group of adjacent overlapping structures, the spring sheet on the rebound side is integrally formed by the pin section 1, the bending section 1 and the pushing section 1. Among them, the pin section 1 is used as a combined connecting pin. The bending section 1 causes the pin section 1 and the pushing section 1 to bend and dislocate in the thickness direction of the spring sheet body, so as to form the elastic gap 13 described below, and to produce corresponding bending deformation in cooperation with the release of thrust or elastic force in service. The pushing section 1 is used as a connection position for arranging the push card, that is, the push card perforation, and as a connection position for arranging the moving contact. The pushing section 1 is also the main part for producing corresponding bending deformation in cooperation with the release of thrust or elastic force in service.

[0122] Under the bending influence of the above-mentioned bending section 1, the pin section 1 of the rebound side spring is close to the magnetic circuit part in the relay structure, and the push section 1 is far away from the magnetic circuit part in the relay structure (close to the normally open static spring assembly). 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 1 is an oblique bending transition structure in which the pin section 1 is close to the magnetic circuit part in the relay structure, and the push section 1 is far away from the magnetic circuit part in the relay structure, that is, the bending section 1 and the pin section 1 form an obtuse angle matching relationship, and the bending section 1 and the push section 1 also form an obtuse angle matching relationship. In order to avoid stress concentration at the bending part of the rebound side spring, it is required that the bending angle between the bending section 1 and the pin section 1 is a circular arc transition structure, and the bending angle between the bending section 1 and the push section 1 is also a circular arc transition structure. As a key part for cooperating with the side spring to produce bending deformation and constrain elastic release reaction force, the angle between the aforementioned bending section 1 and the pin section 1 is reasonably selected within the range of 110 to 150° (for example, 110°, 120°, 130°, 140° or 150°, etc.).

[0123] In the superimposed structure of the second group of adjacent positions, the push-side spring piece is integrally formed by the pin segment 2, the bending segment 2 and the pushing segment 2. Among them, the pin segment 2 is used to cooperate with the pin segment 1 to combine the connecting pins. The bending segment 2 causes the pin segment 2 and the pushing segment 2 to be bent and misaligned in the thickness direction of the spring body, so as to form the elastic gap 13 described below, and to produce corresponding bending deformation in cooperation with the release of thrust or elastic force during service. The pushing segment 2 is used to cooperate with the above-mentioned pushing segment 2 to arrange the connection position of the push card, and is used to arrange the connection position of the moving contact. The pushing segment 2 is also the main part that produces corresponding bending deformation in cooperation with the release of thrust or elastic force during service.

[0124] Under the influence of the bending of the above-mentioned bending section 2, the pin section 2 of the push side spring piece is close to the magnetic circuit part in the relay structure, and the push section 2 is far away from the magnetic circuit part in the relay structure (close to the normally open static spring component). 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 is an oblique bending transition structure in which the pin section 2 is close to the magnetic circuit part in the relay structure and the push section 2 is far away from the magnetic circuit part in the relay structure, that is, the bending section 2 and the pin section 2 form an obtuse angle matching relationship, and the bending section 2 and the push section 2 also form an obtuse angle matching relationship. In order to avoid stress concentration at the bending part of the push side spring piece, it is required that the angle between the bending section 2 and the pin section 2 is a circular arc transition structure, and the angle between the bending section 2 and the push section 2 is also a circular arc transition structure.

[0125] In the overlapping relationship between the rebound side spring piece of the above structure and the second group of adjacent positions of the push side spring piece of the above structure, the angle position between the bending section 1 of the rebound side spring piece and the pin section 1 is higher than the angle position between the bending section 2 of the push side spring piece and the pin section 2, and the angles of the two positions form a spacing match in the height direction; moreover, the angle between the bending section 2 of the push side spring piece and the pin section 2 is greater than the angle between the bending section 1 of the rebound side spring piece and the pin section 1. In the overlapping relationship between the rebound side spring piece of the above structure and the push side spring piece of the above structure, the angle position between the bending section 2 of the push side spring piece and the push section 2 basically coincides with the angle position between the bending section 1 of the rebound side spring piece and the push section 1. Thus, in the second group of adjacent overlapping structures, an elastic gap 13 is formed between the rebound side spring and the push side spring, which is located between the pin connection position and the push connection position, arranged obliquely, and is basically in a triangular structure. One corner of the elastic gap 13 is closed at the angle between the bending section 2 of the push side spring and the pin section 2 due to the overlapping relationship, and the other corner of the elastic gap 13 is closed at the angle between the bending section 2 of the push side spring and the push section 2 due to the overlapping relationship. It is also based on this approximately triangular elastic gap 13 that the bending section 2 of the push side spring constitutes a bottom edge of the elastic gap 13 arranged obliquely, and the bending section 1 of the rebound side spring and part of the pin section 1 near the bending section 1 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.

[0126] The elastic gap 13 of the specific triangular structure formed between the rebound side spring piece and the push side spring piece in the second group of adjacent overlapping relationships is formed by the waist edge formed by the bending of the rebound side spring piece, which forms a space for the push side spring piece in service to deform in accordance with the thrust, reduces the mutual interference of their structural stresses during extrusion, and makes the bending deformation performance of the dynamic spring piece of the overlapping structure better. At the same time, the push side spring piece forms a matching relationship with a bending angle greater than the bending angle of the rebound side spring piece at the corresponding bending position, effectively improving the performance of the push side spring piece in adapting to bending deformation under the action of thrust, and basically does not cause a reaction force of thrust deformation to the rebound side spring piece, and has good compliance, which effectively reduces the structural stress of the entire dynamic spring piece in thrust deformation, making the formed push rod relay as small as possible, and basically maintaining the original electromagnetic attraction design to achieve the thrust required for contact closure. It can be seen that while the current carrying performance is improved, the electromagnetic attraction of the magnetic circuit part is basically not 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 above-mentioned rebound side spring at the elastic gap 13 will produce a certain rigid support when bending, that is, the structural rigidity of the rebound side spring compared to the pushing side spring is enhanced, so that the guarantee of contact closure under the thrust is more stable, and the rebound reaction force of the entire moving spring 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.

[0127] The superimposed structure spring body 1 of the first spring 11', the second spring 12' and the third spring 13' 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 13' 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.

[0128] The above is a specific overlapping structure of three spring leaves in the thickness direction. The following is related to the push-to-connection position forming and the stress concentration prevention structure in the overlapping structure of three spring leaves.

[0129] 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 .

[0130] In the above-mentioned overlapping structure of the reed body 1, in order to adapt to the elastic force adjustment, it is not suitable to set the first reed 11', the second reed 12' and the third reed 13' to have the same width, so the width of the second reed 12' and the third reed 13' are designed to be smaller than the width of the first reed 11', respectively. Of course, the second reed 12' and the third reed 13' can be formed with the same width, so that the rebound reaction force of the entire movable reed when the elastic force is released can be effectively optimized by the second reed 12' and the third reed 13', thereby reducing the technical requirements for the thrust generated by the electromagnetic attraction. Among them, the specific width difference is mainly reflected in the push connection position and the pin connection position of the reed body 1, that is, in the area where the push section is used to form the push card through hole 117, the width of the first reed 11' is respectively greater than the width of the second reed 12' and the third reed 13', and the area where the push section is used to form the contact assembly hole is set with equal width to ensure the stability of the moving contact assembly; in the area where the pin section is used to form the elastic adjustment step 114, the width of the first reed 11' is respectively greater than the width of the second reed 12' and the third reed 13'. It can be seen that the push card through hole 117 of the reed body 1 is actually formed at the two side edges in the width direction of the first reed 11', and is formed in a C-shaped contour structure with the opening facing outward; the elastic adjustment step 114 of the reed body 1 is actually formed at the two side edges in the width direction of the first reed 11', and is a step concave structure with a relatively wide lower side and a relatively narrow upper side (see for details). Figure 4 , Figure 5 and Figure 6 The elastic adjustment step 114 is specifically located between the pin connection position of the spring body 1 and the elastic gap 13.

[0131] The first spring piece 11' having the push card through hole 117 and the elastic adjustment step 114 is concavely formed at the corresponding edges of the first spring piece 11', resulting in a phenomenon of relatively concentrated stress. Based on this phenomenon and the above-mentioned width difference matching structure, in order to avoid stress concentration of the entire spring piece body 1 and plastic deformation or even fracture during repeated thrust deformation, the edge areas of the second spring piece 12' and the third spring piece 13' corresponding to the push card through hole 117 on the first spring piece 11' are respectively formed with a recessed structure 124 (see for details) that is staggered from the corresponding push card through hole 117. Figure 4 , Figure 5 and Figure 6As shown), the second spring piece 12' and the third spring piece 13' respectively correspond to the edge area of ​​the push card through hole 117 on the first spring piece 11', are located on the inner side of the corresponding push card through hole 117, and form a spacing match with the corresponding push card through hole 117; the second spring piece 12' and the third spring piece 13' respectively correspond to the edge area of ​​the elastic adjustment step 114 on the first spring piece 11', and a second recess 125 (see for details) is formed, which is staggered from the corresponding elastic adjustment step 114. Figure 4 , Figure 5 and Figure 6 As shown), the second spring 12' and the third spring 13' respectively correspond to the edge area of ​​the elastic adjustment step 114 on the first spring 11', are located on the inner side of the corresponding elastic adjustment step 114, and form a spacing match with the corresponding elastic adjustment step 114.

[0132] Regarding the clearance notch 124 on the second reed 12' and the third reed 13' 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 reed 12' and the third reed 13' is designed as a flat bottom concave structure, which has corners 1242 on the top and bottom sides of the concave flat bottom 1241 (vertical edge) in the height direction (see Figure 4 , Figure 5 and Figure 6 As shown in FIG. 1 ), 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, so that the clearance notches 124 on the second spring piece 12' and the third spring piece 13' respectively cooperate with the corresponding C-shaped push card through hole 117 on the first spring piece 11' in a rectangular structure similar to a recessed groove.

[0133] Regarding the second clearance notch 125 on the second reed 12' and the third reed 13' corresponding to the elastic adjustment step 114, in order to improve the stress concentration phenomenon, it is not suitable to form a "larger" elastic adjustment step profile structure. Therefore, the clearance notch 125 on the second reed 12' and the third reed 13' is designed as a flat bottom concave structure, which has two corners 1252 on the top and bottom sides of the concave flat bottom 1251 (vertical edge) in the height direction (see Figure 4 , Figure 5 and Figure 6 As shown in FIG. 1 ), 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, so that the second notches 125 on the second reed 12' and the third reed 13' respectively cooperate with the corresponding step-type elastic adjustment step 114 on the first reed 11' in a rectangular structure similar to a recessed groove.

[0134] On the basis of the above-mentioned spring body 1, in order to reduce the elastic reaction force of the first spring 11' and to constrain the rebound reaction force of the movable spring when the elastic force is released, an elastic adjustment hole 115 is provided at the top side of the pin connection position in the height direction and basically at the center area of ​​the width (see Figure 4 and Figure 5 and in the push section 113 of the first reed 11', an elastic adjustment hole 116 is provided at the middle of the push card through hole 117 in the width direction (see Figure 4 and Figure 5 as shown).

[0135] Through the above expression of the design scheme for the push connection position and the pin connection position, it can be clearly seen that in the superimposed structure of the three springs, the structure of the first spring 11' in the horizontal width direction is different from that of the second spring 12' and the third spring 13', and the structure of the third spring 13' in the horizontal width direction is the same as that of the second spring 12', that is, the second spring 12' and the third spring 13' are more like the superimposed structure of two springs of basically the same structure in the thickness direction (there are differences in the parts of the triangular elastic gap formed at the bend).

[0136] The reed body 1 of the above structure is provided with a rivet hole for combining and connecting the pins at its pin section, i.e., the pin connection position, which penetrates the first reed 11', the second reed 12' and the third reed 13' in the thickness direction. The pins constituting the moving reed are combined and connected to the pin connection position of the reed body 1 by riveting, and are located on the side of the reed body 1 facing the magnetic circuit part in the relay structure. The bottom end of the pin 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 extends to the elastic gap 13 of the reed body 1, and is located between the heights of the two corners constituting the second triangular elastic gap 13. In this way, the upper part of the pin has a stop and limit effect on the pin section of the reed body 1 as a backrest support, so that the reed body 1 that is released and rebounded by the elastic force is greatly reduced due to the stop and limit at the elastic gap 13, so as to avoid arcing and secondary conduction with the static spring assembly caused by excessive elastic release reaction force. Of course, in order to improve the stopping rigidity and current carrying capacity of the pin and the stability of the socket on the base, the thickness of the pin should be greater than the thickness of the spring body 1, and a conductive material with higher hardness can be selected for molding, so that the pin with higher hardness can stably limit the spring body 1 when assembled on the base.

[0137] Example 10 The structure of the dynamic spring assembly in this embodiment is the same as that of the dynamic spring assembly in Embodiment 1 or Embodiment 9, except for the push rod relay applied to the dynamic spring assembly.

[0138] In this embodiment, the push rod type relay using the dynamic spring assembly is a normally closed structure, which includes a base and a coil frame, an iron core, a coil, a yoke, an armature, a push card, a dynamic spring assembly and a normally closed static spring assembly assembled on the base.

[0139] Among them, the magnetic circuit part composed of the iron core, coil, yoke and armature arranged at the coil frame on the base and the contact part composed of the movable spring assembly and the normally closed static spring assembly on the base form a left-right arrangement relationship on the base. In the composition structure of the aforementioned contact part, the arrangement position of the normally closed static spring assembly on the base is close to the magnetic circuit part, and the arrangement position of the movable spring assembly on the base is far away from the magnetic circuit part.

[0140] The push card is located between the armature and the movable spring assembly. The armature flipped on the yoke pushes the push card to disconnect the normally closed contact of the contact part; or, when the elasticity of the movable spring assembly is released, the normally closed contact of the contact part is turned on, and the movable spring assembly of the contact part pushes the push card to flip the armature on the yoke. Based on the arrangement of the normally closed static spring assembly of the above-mentioned contact part between the magnetic circuit part and the movable spring assembly, when the push card pushes with the movable spring assembly, it needs to pass through the normally closed static spring assembly in the pushing direction. Therefore, the width of the spring leaf of the normally closed static spring assembly is smaller than the bifurcation width of the push card at one end of the contact movable spring assembly, and is located in the bifurcation space of the push card at one end of the contact movable spring assembly; and, the bifurcation depth of the push card at one end of the contact movable spring assembly basically does not touch the normally closed static spring assembly when the push card runs to the maximum stroke in the pushing direction.

[0141] 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.

[0142] 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, for example, forming a stacked structure of four spring leaves based on Embodiment 9; 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 high-load current reed, comprising a reed body (1); The reed body (1) is a structure in which at least two reeds are overlapped in the thickness direction; In the stacked structure of the reed body (1), two adjacently arranged reeds are divided into a rebound side reed (11) and a push side reed (12) according to the pushing and rebounding directions of the moving reed; Features: Between the rebound side spring piece (11) and the push side spring piece (12) arranged adjacently, there is an elastic gap (13) between the pin connection position and the push connection position and in a triangular structure; Furthermore, the pushing side spring sheet (12) forms a bottom edge of the elastic gap (13); The rebound side spring (11) forms 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.

2. The high-load flow spring according to claim 1, characterized in that: In the relay structure, the arrangement positions of the adjacently arranged rebound side spring pieces (11) are close to the magnetic circuit portion, and the arrangement positions of the adjacently arranged push side spring pieces (12) are far from the magnetic circuit portion.

3. The high-load flow spring according to claim 1, characterized in that: The rebound side spring (11) is integrally formed by a pin section 1 (111), a bending section 1 (112) and a pushing section 1 (113); The bending section 1 (112) is an oblique bending transition structure where the pin section 1 (111) is close to the magnetic circuit part in the relay structure and the pushing section 1 (113) is far from the magnetic circuit part in the relay structure, and an obtuse angle matching relationship is formed between the bending section 1 (112) and the pin section 1 (111), and an obtuse angle matching relationship is formed between the bending section 1 (112) and the pushing section 1 (113); Furthermore, in the overlapping relationship between the rebound side spring piece (11) and the adjacently arranged push side spring piece (12), the angle position between the bending section 1 (112) and the pin section 1 (111) is spaced to match the angle position between the bending section 2 (122) and the pin section 2 (121) of the push side spring piece (12).

4. The high-load flow spring according to claim 3, characterized in that: The angle between the bending section 1 (112) and the pin section 1 (111) of the rebound side spring piece (11) is an arc transition structure; The angle between the bending section 1 (112) and the pushing section 1 (113) of the rebound side spring leaf (11) is an arc transition structure.

5. The high-load flow spring according to claim 3 or 4, characterized in that: The included angle between the bending section 1 (112) and the pin section 1 (111) of the rebound side spring piece (11) is 110-150 degrees.

6. The high-load flow spring according to claim 1, characterized in that: The pushing side spring piece (12) is integrally formed by a second pin section (121), a second bending section (122) and a second pushing section (123); 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 from the magnetic circuit part in the relay structure, and an obtuse angle matching relationship is formed between the bending section 2 (122) and the pin section 2 (121), and an obtuse angle matching relationship is formed between the bending section 2 (122) and the push section 2 (123); Furthermore, the included angle of the fold between the second bending section (122) and the second pin section (121) of the pushing side spring piece (12) is greater than the included angle of the fold between the first bending section (112) and the first pin section (111) of the rebound side spring piece (11) arranged adjacently.

7. The high-load current reed according to claim 1, 3 or 6, characterized in that: In the overlapping relationship between the adjacently arranged rebound side spring piece (11) and the push side spring piece (12), one corner of the elastic gap (13) is closed at the angle between the second bending section (122) and the second pin section (121) of the push side spring piece (12), and the other corner of the elastic gap (13) is closed at the angle between the second bending section (122) and the second push section (123) of the push side spring piece (12).

8. The high-load flow spring according to claim 1, characterized in that: The movable reed also has a pin (2) formed separately from the reed body (1); The pin (2) is connected to the pin connection position of the reed body (1) in a riveted combination, and extends outward from the bottom of the pin section of the reed body (1) in the height direction; In the combined connection structure of the reed body (1) and the pin (2), 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 assemble and fix in the base.

9. The high-load flow spring according to claim 8, characterized in that: One end of the pin (2) extends to the elastic gap (13) of the reed body (1).

10. The high-load flow spring according to claim 9, characterized in that: The height of the end of the pin (2) at the elastic gap (13) from the angle between the second bending section (122) of the pushing side spring sheet (12) farthest from the magnetic circuit portion and the second pin section (121) is at most 2 mm.

11. The high-load flow spring according to claim 1, characterized in that: The push-connection position of the reed body (1) is formed on the first reed (11') closest to the magnetic circuit part in all the reed stacking structures; Push card through holes (117) are formed at both side edges of the first spring sheet (11') in the width direction; The remaining reeds correspond to the edge areas of the push connection positions on the first reed (11'), are located on the inner side of the corresponding push connection positions, and form a spacing fit with the corresponding push connection positions.

12. The high-load flow spring according to claim 11, characterized in that: The remaining reeds except the first reed (11') have a recessed structure (124) at an edge region corresponding to the push connection position on the first reed (11') and staggered from the corresponding push connection position.

13. The high-load flow spring according to claim 12, characterized in that: The clearance notch 1 (124) is a flat-bottomed concave structure, having corners 1 (1242) located on the top and bottom sides of the concave flat bottom 1 (1241) in the height direction, and the two corners 1 (1242) are located on the inner sides of the top and bottom sides of the corresponding push connection position in the height direction.

14. The high-load flow spring according to claim 11, characterized in that: At the edges of both sides in the width direction of the first spring sheet (11'), there are elastic adjustment steps (114) located between the pin connection position and the elastic gap (13) and having a stepped concave shape; The remaining reeds except the first reed (11') correspond to the edge area of ​​the elastic adjustment step (114) on the first reed (11'), are located on the inner side of the corresponding elastic adjustment step (114), and form a spacing fit with the corresponding elastic adjustment step (114).

15. The high-load flow spring according to claim 14, characterized in that: The remaining reeds except the first reed (11') have a second paving notch (125) with a concave structure and staggered with the corresponding elastic adjustment step (114) at an edge region corresponding to the elastic adjustment step (114) on the first reed (11').

16. The high-load flow spring according to claim 15, 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.

17. The high-load current reed according to claim 11, 12, 14 or 15, characterized in that: The width of the remaining reeds except the first reed (11') at least at the pushing section is smaller than the width of the first reed (11') at the corresponding position.

18. The high-load flow spring according to claim 11 or 14, characterized in that: The pin section (111) of the first spring sheet (11') is provided with an elastic adjustment hole (115) located at the top side of the pin connection position in the height direction; And / or, the pushing section (113) of the first spring sheet (11') is provided with a second elastic adjustment hole (116) located in the middle of the pushing connection position in the width direction.

19. The high-load flow spring according to claim 1, 8 or 11, characterized in that: The reed body (1) is a structure in which two reeds are overlapped in the thickness direction.

20. The high-load flow spring according to claim 19, characterized in that: The two spring leaves of the spring body (1) are overlapped in an integrated bending structure, and the overlapping bending position is located at the top of the contact connection position in the height direction.

21. 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.

22. The push rod type relay according to claim 21, characterized in that: The push rod type relay is of a normally open structure. The magnetic circuit portion of the normally open push rod type relay is mainly composed of a coil frame, an iron core, a coil (4), a yoke (5) and an armature (6) mounted on a base (3). The contact portion of the normally open push rod type relay is mainly composed of a moving spring assembly and a normally open static spring assembly (8) mounted on the base (3). The moving spring assembly is arranged close to the magnetic circuit portion, and the normally open static spring assembly (8) is arranged away from the magnetic circuit portion. The magnetic circuit portion and the contact portion of the normally open push rod type relay are arranged on the base (3) in a left-right position through a push card (7), and the push card (7) is located between the armature (6) and the moving spring assembly. Alternatively, the push rod type relay is a conversion type structure, the magnetic circuit part of the conversion type push rod type relay mainly consists of a coil frame, an iron core, a coil (4), a yoke (5) and an armature (6) mounted on the base (3); the contact part of the conversion type push rod type relay mainly consists of a normally closed static spring assembly (9), a moving spring assembly and a normally open static spring assembly (8) mounted on the base (3), the moving spring assembly being arranged between the normally closed static spring assembly (9) and the normally open static spring assembly (8), the normally closed static spring assembly (9) being arranged close to the magnetic circuit part, and the normally open static spring assembly (8) being arranged away from the magnetic circuit part; the magnetic circuit part and the contact part of the conversion type push rod type relay are matched on the base (3) in a left-right arrangement relationship through a push card (7), and the push card (7) is arranged between the armature (6) and the moving spring assembly; Alternatively, the push rod type relay is of a normally closed structure, and the magnetic circuit portion of the normally closed push rod type relay is mainly composed of a coil frame, an iron core, a coil, a yoke and an armature assembled on a base; the contact portion of the normally closed push rod type relay is mainly composed of a moving spring assembly and a normally closed static spring assembly assembled on the base, the arrangement position of the moving spring assembly is far away from the magnetic circuit portion, and the arrangement position of the normally closed static spring assembly is close to the magnetic circuit portion; The magnetic circuit part and the contact part of the normally closed push rod relay are arranged on the base in a left-right arrangement relationship through a push card, and the push card is located between the armature and the dynamic spring assembly.

Images