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

Abstract

The utility model relates to the technical field of relays, and particularly discloses a high-load movable contact spring and a push rod type relay comprising the same. 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 utility model, 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] This utility model relates to the field of relay technology, specifically a high-load moving spring and a push rod relay including the moving spring. Background Technology

[0002] A push-rod relay mainly consists of a base, a magnetic circuit section connected to the left and right sides by a push-lock mechanism, and a contact section. The magnetic circuit section mainly comprises a coil frame on the base, an iron core within the coil frame, a coil wound around the outside of the coil frame, a yoke beside the coil, an armature mounted on the yoke in a flip-up configuration, and a compression spring applying spring force to the back of the armature. The contact section mainly consists of a moving spring assembly and a stationary spring assembly on the base. Its working principle is roughly as follows: when current is applied to both ends of the coil leads, 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, yoke, and armature, and generates an 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 in the contact part, causing the armature to rotate, thereby driving the pusher to push the moving spring in the contact part, realizing the closure of the moving and stationary contacts in the contact part. When the excitation current decreases to a certain value, the elastic reaction torque of the moving spring in the contact part is greater than the electromagnetic attraction torque, the armature returns to the initial state, and the moving and stationary contacts in the contact part open.

[0003] To meet the technical requirements of high-current operating environments, the aforementioned push-rod relays, guided by the design logic of minimizing the increase in electromagnetic attraction in the magnetic circuit, will have a double-layered composite structure for the moving spring. This allows the moving spring to achieve high current carrying capacity and low temperature rise performance. To accommodate the thrust deformation caused by the electromagnetic attraction through the push-lock, and to prevent structural stress from interfering with each other during compression and hindering thrust deformation, a layered, elastic clearance is formed within the double-layered composite structure between the pin connection position and the push-lock connection position. The elastic gaps used in the high-load flow springs of push rod relays are mostly formed in a layered structure that is approximately semi-circular or approximately circular. For example, Chinese patent documents disclose technologies such as "A Small Electromagnetic Relay" (publication number CN213150682 U, publication date May 7, 2021), "An Electromagnetic Relay" (publication number CN214505389 U, publication date October 26, 2021), and "An Electromagnetic Relay with Spring Push Structure" (publication number CN 1652278 A, publication date August 10, 2005).

[0004] In its research, the applicant discovered that the movable spring of the double-layered spring adopts a semi-circular elastic gap (such as the technology in publications CN 213150682 U and CN 214505389 U). Because the semi-circular structure is formed on the spring on the side closer to the magnetic circuit (i.e., the spring on the rebound side), and the spring on the side closer to the stationary spring (i.e., the spring on the pushing side) is a straight plate structure, when the thrust is applied to the movable spring, the spring on the pushing side with the straight plate structure will generate a reverse force, which makes the structural stress of the entire movable spring large during compression and hinders the deformation of the thrust, requiring a large electromagnetic attraction to generate the thrust. The moving spring of the double-layered spring adopts a circular elastic gap structure (such as the technology in publication number CN 1652278 A). Because the rebound side spring and the push side spring each have a semi-circular structure and a curved layered structure facing each other, when the thrust is applied to the moving spring, the semi-circular structure of the push side spring will generate a large reverse force, which makes the structural stress of the entire moving spring significantly increase during compression and significantly hinders the thrust deformation, requiring a larger electromagnetic attraction to generate thrust. Moreover, during the long-term repeated elastic deformation process, the push side spring is prone to plastic deformation or even breakage.

[0005] Therefore, it is evident that the aforementioned double-layered high-load flow spring, guided by the design logic of minimizing the increase in electromagnetic attraction in the magnetic circuit, still needs improvement.

[0006] During the search, the applicant also discovered that in other types of relays, the moving spring of the double-layered relay uses an elastic gap design with an approximate parallelogram shape. For example, the technology disclosed in Chinese patent document entitled "A Moving Spring Assembly and Relay," publication number CN 216957911 U, publication date July 12, 2022, is as follows: This technology forms a parallelogram elastic gap by creating two bent portions on the pushing side spring that are misaligned with the rebounding side spring. During thrust deformation, the two bent portions of the pushing side spring generate a reverse force (similar to the technology in publication number CN 1652278 A, but of course superior to the technology in CN 1652278 A). This results in a large structural stress on the entire moving spring during compression, hindering thrust deformation and requiring a large electromagnetic attraction force to generate thrust. Moreover, during long-term repeated elastic deformation, the pushing side spring is prone to plastic deformation or even breakage.

[0007] In summary, the existing double-layered moving spring structure has a technical problem of high structural stress due to its elastic gap design, which needs to be improved to meet the high technical requirements of the market. Utility Model Content

[0008] The technical objective of this utility model is to provide a high-load moving spring with low structural stress during thrust deformation, and a push rod relay including the moving spring, addressing the special characteristics of the push rod relay in adapting to high current operating conditions and the shortcomings of existing technologies.

[0009] The technical objective of this utility model is achieved through the following technical solution: a high-load flow spring, comprising a spring body;

[0010] The reed body is a structure consisting of at least two reeds stacked together in the thickness direction;

[0011] In the stacked structure of the reed body, two adjacent reeds are distinguished as a spring-returning reed and a pushing reed, based on the pushing and rebounding direction of the moving reed.

[0012] The spring-loaded side spring and the push-side spring arranged in adjacent positions have an elastic gap in a triangular structure between the pin connection position and the push connection position;

[0013] Furthermore, the pushing side spring forms one bottom edge of the elastic gap;

[0014] The rebound side springs form the two waists of the elastic gap;

[0015] The length of the base is greater than the length of each of the two waist sides.

[0016] The above-mentioned technical measures address the special characteristics of the push rod relay in adapting to high-current operating conditions. The moving spring is composed of a multi-layered stacked structure to form a large current-carrying area. On the one hand, this multi-layered stacked structure minimizes the impact of the large current-carrying area on the electromagnetic attraction design of the magnetic circuit. On the other hand, the large current-carrying area reduces the current density of the spring when carrying current, achieving high current carrying capacity and thus reducing the heating phenomenon of the moving spring in high-current operating conditions.

[0017] Based on this, the above-mentioned technical measures design the elastic gap between the double-layer laminations arranged in adjacent positions as a specific approximate triangular structure to improve the bendability of the push-side spring (in the relay structure, the spring arranged along the direction of the push card bending (opposite to the direction of the elastic release of the moving spring), which is relatively far away from the magnetic circuit part and close to the front of the pushing bending direction (if any), the same below) under the action of thrust, effectively reducing the structural stress of the push-side spring in the thrust deformation, so that the formed push rod relay can achieve high current carrying capacity while basically maintaining the original electromagnetic attraction design. While achieving high current carrying capacity, it is conducive to the relative compactness and miniaturization of the overall structure of the push rod relay, avoiding the need for upgrading the design of the magnetic circuit part and the overall structural size. Meanwhile, the angled structure at the elastic gap of the adjacent spring-side contacts (in the relay structure, springs arranged along the direction of elastic release of the moving spring (opposite to the direction of pushing and bending of the push card), which are closer to the magnetic circuit and farther from the stationary spring assembly (if any) in front of the direction of pushing and bending, the same below) creates a clearance space for the pushing spring to deform under the force, reducing the interference of structural stresses during compression; and enhances the structural rigidity of the spring-side contacts compared to the pushing spring, making the protection of contact closure under the action of thrust more stable, and also constraining and limiting the rebound reaction force of the entire moving spring when the elastic force is released, reducing the phenomenon of contact arcing and secondary conduction caused by the rebound reaction force.

[0018] As one of the preferred technical solutions, in the relay structure, the spring-loaded contacts arranged in adjacent positions are positioned close to the magnetic circuit, while the push-side spring-loaded contacts arranged in adjacent positions are positioned far from the magnetic circuit. This technical measure is designed to address the pushing direction of the push lever spring in a push-rod relay and the rebound direction of the pushed spring when it is elastically released, achieving the technical effects described above.

[0019] As one of the preferred technical solutions, the spring-loaded side spring is integrally composed of a lead segment, a bending segment, and a pushing segment;

[0020] The first bending section is an oblique bending transition structure in which the first pin section is close to the magnetic circuit in the relay structure and the first pushing section is far away from the magnetic circuit in the relay structure. The first bending section and the first pin section form an obtuse angle fit relationship.

[0021] Furthermore, in the overlapping relationship between the rebound side spring and the adjacent push side spring, the angle position between the first bending segment and the first pin segment is matched with the angle position between the second bending segment and the second pin segment of the push side spring.

[0022] The above-mentioned technical measures enable the elastic gaps formed by the overlapping arrangement of adjacent positions to form an approximately triangular structure with a certain slant in the vertical height direction. While reliably realizing the function of the aforementioned triangular elastic gaps, it also enables the rebound side springs and push side springs arranged adjacently to form a stable overlap. Even during thrust deformation, the overlapping structure at the elastic gap will basically not delaminate. It also reliably achieves the technical effect that the rigidity of the rebound side spring at the elastic gap is higher than that of the push side spring, making the protection of contact closure under thrust more stable and the constraint of the rebound reaction force of the entire moving spring when the elastic force is released more reliable.

[0023] Furthermore, the angle between the first bent section and the first pin section of the spring-loaded side sheet is a rounded transition structure.

[0024] The angle between the bending section one and the pushing section one of the rebound side spring is a rounded transition structure.

[0025] The above-mentioned technical measures can effectively avoid excessive stress concentration at the corner of the spring sheet in the adjacent arrangement, so that plastic deformation or even breakage at the corner will basically not occur during long-term service.

[0026] Furthermore, the angle between the bent section one and the lead section one of the rebound spring is 110° to 150°. This technical measure was 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 significant delamination of the overlapping structure at the elastic gap of the moving spring during thrust deformation. If the angle is too large, it will compress the clearance space for the adjacent push-side springs in thrust deformation, which will also increase the structural stress in thrust deformation and is not conducive to the overlapping and forming of the moving springs. Therefore, this technical measure can reliably realize the function of the triangular elastic gap of the adjacent arrangement, while enabling the rebound spring and the push-side spring to form a stable overlap, which is easy to form and has low structural stress in thrust deformation. This is one of the key technical guarantees for the optimal effect of this utility model.

[0027] As one of the preferred technical solutions, the push-side spring is integrally composed of pin segment two, bending segment two, and push segment two;

[0028] The second bending section is an oblique bending transition structure in which the second pin section is close to the magnetic circuit in the relay structure and the second push section is far away from the magnetic circuit in the relay structure. The second bending section and the second pin section form an obtuse angle fit relationship.

[0029] Furthermore, the angle between the second bent segment and the second pin segment of the push-side spring is greater than the angle between the first bent segment and the first pin segment of the adjacent spring.

[0030] The above-mentioned technical measures enable the elastic gaps formed by the adjacent overlapping arrangement to form an approximately triangular structure with a certain slant in the vertical height direction. While reliably realizing the function of the above-mentioned triangular elastic gaps, it can make the rebound side springs and push side springs arranged in adjacent positions form a stable overlap. Even in the thrust deformation, the overlapping structure at the elastic gap will basically not delaminate. It can also reliably achieve the technical effect that the rigidity of the push side spring at the elastic gap is lower than that of the rebound side spring, thereby reliably reducing the structural stress of the push side spring in the thrust deformation and improving the bending deformation performance of the push side spring under the action of thrust.

[0031] As one of the preferred technical solutions, in the overlapping relationship of the rebound side spring and the push side spring arranged in adjacent positions, one corner of the elastic gap closes at the bend between the second bent section and the second pin section of the push side spring, and the other corner of the elastic gap closes at the bend between the second bent section and the second push section of the push side spring.

[0032] This technical measure is based on the elastic gap formed by bending adjacent double-layer laminated structures into an approximate triangle. It can ensure the stable existence of the elastic gap and will not hinder the stability of the double-layer laminated structure.

[0033] As one of the preferred technical solutions, the moving reed also has pins that are separately formed from the reed body;

[0034] The pins are riveted together and connected to the pin connection positions of the reed body, and extend outward from the bottom of the pin segment of the reed body in the height direction;

[0035] 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.

[0036] In the assembly relationship with the relay base, the pin is used for mounting and fixing in the base.

[0037] Furthermore, one end of the pin extends to the elastic gap of the reed body.

[0038] Furthermore, the maximum height of the pin at the end of the elastic gap from the angle between the second bent section of the push-side spring and the second pin section is 2mm.

[0039] The above-mentioned technical measures form the pins of the moving spring independently of the spring body. This helps to reduce the technical difficulty of forming the spring body, improve the structural strength of the pins, and ensure that the assembly relationship of the moving spring on the base is maintained stably. It also helps to increase the current carrying area of ​​the pins.

[0040] 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 pins extends to the elastic gap of the reed body (including adjacent engagement or engagement), so that the pins mounted on the base have a good stopping and limiting effect on the reed body when the elastic force is released, that is, to stop and constrain the rebound force of the reed body when the elastic force is released, and reduce the phenomenon of ignition arcing and secondary conduction caused by the rebound force.

[0041] The aforementioned stop and limit effect achieved by the pin, compared to the stop and limit structure attached to the housing in the prior art, achieves a "two-in-one" dual function with the pin, eliminating the need for a more complex and costly additional stop and limit structure. This contributes to a simpler and lower-cost structure for the entire push rod relay.

[0042] 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 stacked structures;

[0043] Push-hold holes are formed at both edges of the first spring in the width direction;

[0044] The remaining reeds correspond to the edge area of ​​the push connection position on the first reed, are located inside the corresponding push connection position, and form a gap fit with the corresponding push connection position.

[0045] Furthermore, the remaining reeds, excluding the first reed, have concave structures and offset clearance notches corresponding to the push connection positions on the edge regions of the first reed.

[0046] Furthermore, the clearance notch is a flat-bottomed concave structure with two corners located on the top and bottom sides of the concave flat bottom in the height direction. These two corners are located on the inner side of the corresponding pushing connection position on the top and bottom sides in the height direction.

[0047] The above-mentioned technical measures are based on a multi-layered composite structure of moving springs. On the one hand, the width of the other springs besides the first spring is smaller than the width of the first spring, forming an irregularly stacked multi-layered spring. This reduces the thrust required by the electromagnetic attraction and also effectively optimizes the rebound reaction force of the entire moving spring when the spring is released. On the other hand, the other springs besides the first spring are used as the parts that cooperate with the push-lock hole on the edge of the first spring, forming a misaligned fit with the clearance notch. This effectively reduces the thrust requirement of the multi-layered composite structure of the moving spring and effectively avoids the concentration of structural stress distribution between the first spring and other springs during thrust deformation, greatly reducing the risk of plastic deformation or even breakage of the moving spring during thrust deformation.

[0048] Furthermore, the first spring has two sides of its width direction with an elastic adjustment step that is recessed and located between the pin connection position and the elastic gap.

[0049] The remaining springs, except for the first spring, are located inside the corresponding elastic adjustment step on the edge region of the first spring, forming a gap fit with the corresponding elastic adjustment step.

[0050] Furthermore, the remaining springs, excluding the first spring, have concave structures and offset clearance notches, corresponding to the edge regions of the elastic adjustment steps on the first spring, in relation to the edge regions of the elastic adjustment steps on the first spring.

[0051] Furthermore, the second clearance notch is a flat-bottomed concave structure with two corners located on the top and bottom sides of the concave flat bottom in the height direction. These two corners are located on the inner sides of the top and bottom sides of the corresponding elastic adjustment step in the height direction.

[0052] The above-mentioned technical measures are based on a multi-layered composite structure of moving springs, which allows other springs to be used as parts of the elastic adjustment structure that cooperates with the edge of the first spring, forming a misaligned fit with a clearance notch. On the one hand, this helps to ensure that the elastic adjustment structure of the first spring can perform its function, and on the other hand, it effectively avoids the concentration of structural stress distribution of the first spring and other springs during thrust deformation, greatly reducing the risk of plastic deformation or even breakage of the moving spring during thrust deformation.

[0053] Furthermore, the width of the remaining springs, except for the first spring, is at least less than the width of the first spring at the corresponding part, at the pushing section. This technical measure creates an irregular overlap between the other springs and the first spring in the width direction, thereby reducing the technical requirements for the thrust generated by the electromagnetic attraction and effectively optimizing the rebound reaction force of the entire moving spring when the elastic force is released through the other springs.

[0054] Furthermore, the lead segment of the first reed is provided with an elastic adjustment hole located on the top side of the lead connection position in the height direction;

[0055] Furthermore, the pushing section of the first reed has an elastic adjustment hole two located at the middle of the pushing connection position in the width direction.

[0056] The above-mentioned technical measures can reduce the elastic reaction force of the first spring, thereby constraining the rebound reaction force of the moving spring when the elastic force is released, effectively reducing the risk of arcing and secondary conduction.

[0057] As one of the preferred technical solutions, the reed body is a structure in which two reeds are stacked together in the thickness direction.

[0058] Furthermore, the two springs of the spring body are stacked in an integral bending structure, and the bending position of the stacked springs is located at the top of the contact connection position in the height direction.

[0059] The above-mentioned technical measures make it easy to realize the double-layer stacked structure of the moving spring. On the one hand, it can save the manufacturing mold of the spring; on the other hand, it is convenient to adjust the bending parameters on the spring; on the third hand, it can make the formed moving spring have high consistency; and on the fourth hand, it is conducive to the simple and rapid automated forming of the double-layer stacked structure of the moving spring.

[0060] A push-rod type relay includes a magnetic circuit portion, a contact portion, and a push-lock located between the magnetic circuit portion and the contact portion;

[0061] The moving spring assembly that makes up the contact portion has any of the moving spring structures described above.

[0062] Furthermore, the push-rod relay is a normally open type;

[0063] The magnetic circuit of a normally open push rod relay mainly consists of a coil frame, iron core, coil, yoke, and armature mounted on a base.

[0064] The contact part of the normally open push rod relay mainly consists of a moving spring assembly and a normally open stationary spring assembly mounted on the base. The moving spring assembly is arranged close to the magnetic circuit part, and the normally open stationary spring assembly is arranged away from the magnetic circuit part.

[0065] The magnetic circuit portion and the contact portion of the normally open push rod relay are arranged in a left-right position on the base and are engaged by a push clip;

[0066] The pusher is located between the armature and the moving spring assembly;

[0067] Alternatively, the push-rod relay may be a switching type structure;

[0068] The magnetic circuit of the changeover type push rod relay mainly consists of a coil frame, iron core, coil, yoke, and armature mounted on the base;

[0069] The contact part of the changeover type push rod relay mainly consists of a normally closed stationary spring assembly, a moving spring assembly, and a normally open stationary spring assembly mounted on the base. The moving spring assembly is positioned between the normally closed stationary spring assembly and the normally open stationary spring assembly. The normally closed stationary spring assembly is positioned close to the magnetic circuit part, and the normally open stationary spring assembly is positioned far away from the magnetic circuit part.

[0070] The magnetic circuit portion and the contact portion of the changeover type push rod relay are arranged in a left-right position on the base and are engaged by a push clip;

[0071] The pusher is located between the armature and the moving spring assembly.

[0072] Alternatively, the push-rod relay may be a normally closed type.

[0073] The magnetic circuit of a normally closed push rod relay mainly consists of a coil frame, iron core, coil, yoke, and armature mounted on a base.

[0074] The contact part of the normally closed push rod relay mainly consists of a moving spring assembly and a normally closed stationary spring assembly mounted on the base. The moving spring assembly is arranged away from the magnetic circuit part, and the normally closed stationary spring assembly is arranged close to the magnetic circuit part.

[0075] The magnetic circuit portion and the contact portion of the normally closed push rod relay are arranged in a left-right position on the base and are engaged by a push clip;

[0076] The pusher is located between the armature and the moving spring assembly.

[0077] The moving spring assembly of the aforementioned push rod relay is formed based on the aforementioned moving spring, thus possessing the corresponding technical effects brought about by the aforementioned moving spring. This allows the push rod relay to reliably achieve high current carrying capacity while basically maintaining the original electromagnetic attraction design, avoiding the need for upgrading the magnetic circuit and overall structural dimensions. This is conducive to forming a lower-dimensional competitive advantage in the market and has a good market prospect.

[0078] The beneficial technical effects of this utility model are as follows: The above-mentioned technical measures, addressing the special characteristics of the push-rod relay in adapting to high-current operating environments, form a multi-layered, high-current-carrying moving spring. This results in low structural stress during thrust deformation, allowing the push-rod relay to achieve high current-carrying performance while essentially maintaining its original electromagnetic attraction design. Simultaneously, this high current-carrying performance facilitates a more compact and miniaturized overall structure of the push-rod relay, avoiding the need for upgrades to the magnetic circuit and overall structural dimensions. This, in turn, allows the resulting push-rod relay to compete in the market with a lower-dimensional design. Furthermore, the elastic properties of the moving spring are easily adjustable and adaptable, effectively reducing the risk of plastic deformation or even breakage during repeated thrust deformation, resulting in high reliability. Attached Figure Description

[0079] Figure 1 This is a schematic diagram of the structure of the moving spring of this utility model.

[0080] Figure 2 for Figure 1 A schematic diagram of the structure of the middle reed body.

[0081] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0082] Figure 4 for Figure 2 The right view.

[0083] Figure 5 for Figure 4 Schematic diagram of the structure of the spring-loaded side spring ( Figure 2 (To the left).

[0084] Figure 6 for Figure 4 Schematic diagram of the push-side spring in the middle ( Figure 2 (to the right).

[0085] Figure 7 The screenshot shows a simulation comparison of the movable spring of this utility model with movable springs of other structural forms.

[0086] Figure 8 This is a schematic diagram of a push rod type relay according to this utility model.

[0087] Figure 9 This is a schematic diagram of another structure of the push rod relay of this utility model.

[0088] Figure 10 This is a schematic diagram of another structure of the moving reed of this utility model (only the reed body is shown).

[0089] Figure 11 for Figure 10 A magnified view of a portion of the image.

[0090] The symbols in the diagram have the following meanings: 1—Reed body; 11'—First reed; 11—Rebound side reed; 111—Pin segment one; 112—Bending segment one; 113—Push segment one; 114—Elastic adjustment step; 115—Elastic adjustment hole one; 116—Elastic adjustment hole two; 117—Push card through hole; 12'—Second reed; 12—Push side reed; 121—Pin segment two; 122—Bending segment two; 123—Push segment two; 124—Relief notch one; 1241—Concave flat bottom one; 1242—Edge one; 125—Relief notch two; 1251—Concave flat bottom two; 1252—Edge two; 13'—Third reed; 13—Elastic gap; 2—Pin; 3—Base; 4—Coil; 5—Yoke; 6—Armature; 7—Push card; 8—Normally open stationary spring assembly; 9—Normally closed stationary spring assembly. Detailed Implementation

[0091] This utility model relates to the field of relay technology, specifically a high-load moving spring and a push-rod relay including the moving spring. The main technical solution of this utility model will be described in detail below with reference to several embodiments. Embodiment 1 is illustrated in conjunction with the accompanying drawings—that is… Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The technical solution of this utility model will be clearly and thoroughly explained; Embodiment 2 is illustrated in conjunction with the accompanying drawings. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 9 The technical solution of this utility model will be clearly and thoroughly explained; Embodiment 9 is illustrated in conjunction with the accompanying drawings. Figure 10 and Figure 11 The technical solution of this utility model is clearly and in detail explained; although other embodiments are not drawn separately, their main structure can still be referred to the drawings of Embodiment 1, Embodiment 2 or Embodiment 9.

[0092] It should be noted that the accompanying drawings of this utility model are schematic, and unnecessary details have been simplified to clarify the technical purpose of this utility model, so as to avoid obscuring the technical solution contributed by this utility model to the prior art. In addition, the expressions such as "about" and "basically" regarding quantity or fit relationship in the following text mean that reasonable assembly errors and processing errors are allowed in the industry, and do not literally describe absolute quantity or fit relationship.

[0093] Example 1

[0094] See Figure 8 As shown, the push-rod relay of this utility model is a normally open push-rod relay, which includes a base 3 and a coil frame, iron core, coil 4, yoke 5, armature 6, push card 7, moving spring assembly, and normally open stationary spring assembly 8, etc., assembled on the base 3. Among them, the magnetic circuit part formed by the iron core, coil 4, yoke 5, and armature 6 arranged on the coil frame and the contact part formed by the moving spring assembly and normally open stationary spring assembly 8 on the base 3 are arranged in a left-right relationship on the base 3. The push card 7 is located between the armature 6 and the moving spring assembly. The armature 6, which flips 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 flip on the yoke 5. In the aforementioned push rod type relay, the moving spring assembly is arranged close to the magnetic circuit part, and the normally open stationary spring assembly 8 is arranged far away from the magnetic circuit part. When the pusher 7 pushes, the moving spring assembly bends and deforms to attract and connect the conductive contact part, and when the moving spring assembly is elastically released, it disconnects the contact part. Figure 8 The diagram also illustrates the bending direction of the moving spring assembly when it is pushed by the pusher 7 (i.e., the pushing direction), and the direction of the spring assembly's elastic rebound after release (i.e., the rebound direction).

[0095] The normally open stationary spring assembly 8 (usually, normally open and normally closed states refer to the double stationary spring assembly present in the relay, and the engaging / disengaging action of the moving spring assembly is switching between the normally open stationary spring assembly and the normally closed stationary spring assembly; since the above relay has only one set of stationary spring assemblies, the stationary spring assembly referred to below in this embodiment refers to the normally open stationary spring assembly 8) is composed of a stationary spring and a stationary contact.

[0096] The moving spring assembly consists of a moving spring and a moving contact, as described below.

[0097] To be suitable for high-current operating environments, the moving spring of the above-mentioned moving spring assembly and the stationary spring of the stationary spring assembly 8 are relatively thicker than ordinary moving springs and stationary springs, so as to increase the current carrying area, reduce the current density in the spring during service, and thus reduce the heat generation of the spring, achieving the technical effect of low temperature rise.

[0098] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the moving spring used in the above-mentioned moving spring assembly has a spring body 1 and a pin 2 that are assembled and connected together after being separately formed. In the following structural description of them, the height direction refers to the height shown in the figure, that is, the state shown with the base as the assembly bottom; the thickness direction refers to the direction of the stacked layer, that is, along the direction of the push card; and the width direction refers to the direction transverse to the direction of the push card.

[0099] To accommodate high current carrying capacity and minimize thrust, the reed body 1 is a composite structure consisting of a return-side reed 11 (located on the side adjacent to the magnetic circuit in the relay structure, i.e., the first reed 11') and a push-side reed 12 (located on the side adjacent to the normally open stationary spring assembly in the relay structure, i.e., the second reed 12') in the thickness direction. To enable low-cost, easy, and high-quality molding of this composite structure, the return-side reed 11 and the push-side reed 12 of the reed body 1 are integrally bent composite structures, with the bent position located at the top of the contact connection position (i.e., the moving contact connection position) in the height direction.

[0100] In the aforementioned composite structure, the spring-loaded side spring 11 is integrally formed by a lead segment 111, a bending segment 112, and a pushing segment 113. The lead segment 111 serves as a connecting lead 2. The bending segment 112 causes the lead segment 111 and the pushing segment 113 to bend and misalign in the thickness direction of the spring body 1, facilitating the formation of the elastic gap 13 and the corresponding bending deformation during service in response to thrust or spring release. The pushing segment 113 serves as a connection point for arranging the push card—i.e., the push card through-hole 17—and as a connection point for arranging the moving contact. The pushing segment 113 is also the main part that undergoes corresponding bending deformation during service in response to thrust or spring release.

[0101] Under the bending effect of the aforementioned bending section 112, the lead section 111 of the return spring 11 is closer to the magnetic circuit in the relay structure, while the push section 113 is farther away from the magnetic circuit (closer to the stationary spring assembly). To accommodate the electromagnetic attraction design requirements of thrust deformation and reduce the thrust generated on the magnetic circuit, the bending section 112 is a slanted bending transition structure where the lead section 111 is closer to the magnetic circuit in the relay structure, and the push section 113 is farther away from the magnetic circuit in the relay structure. That is, the bending section 112 and the lead section 111 form an obtuse angle fit, and the bending section 112 and the push section 113 also form an obtuse angle fit. To avoid stress concentration at the bending point of the return spring 11, the angle between the bending section 112 and the lead section 111 is required to be a rounded transition structure, and the angle between the bending section 112 and the push section 113 is also a rounded transition structure. As a key part that helps to generate bending deformation and constrain the elastic release reaction force of the side spring 12, the angle between the aforementioned bending section 112 and the pin section 111 is reasonably selected in the range of 110 to 150° (e.g., 110°, 120°, 130°, 140° or 150°, etc.).

[0102] In the aforementioned composite structure, the push-side spring 12 is integrally formed by a second pin segment 121, a second bending segment 122, and a second push segment 123. The second pin segment 121 is used to connect the pin 2 in conjunction with the first pin segment 111. The second bending segment 122 causes the second pin segment 121 and the second push segment 123 to bend and misalign in the thickness direction of the spring body 1, facilitating the formation of the elastic gap 13 and allowing for corresponding bending deformation during service in response to thrust or spring release. The second push segment 123 is used to arrange the connection position of the push card and the connection position of the moving contact. The second push segment 123 is also the main part that undergoes corresponding bending deformation during service in response to thrust or spring release.

[0103] Under the bending effect of the aforementioned bending segment 122, the pin segment 121 of the push-side spring 12 is closer to the magnetic circuit in the relay structure, while the push segment 123 is farther away from the magnetic circuit (closer to the stationary spring assembly). To accommodate the thrust deformation and reduce the electromagnetic attraction design requirements of the thrust generated on the magnetic circuit, the bending segment 122 is a slanted bending transition structure where the pin segment 121 is closer to the magnetic circuit in the relay structure and the push segment 123 is farther away from the magnetic circuit in the relay structure. That is, the bending segment 122 and the pin segment 121 form an obtuse angle fit, and the bending segment 122 and the push segment 123 also form an obtuse angle fit. To avoid stress concentration at the bending point of the push-side spring 12, the angle between the bending segment 122 and the pin segment 121 is required to be a rounded transition structure, and the angle between the bending segment 122 and the push segment 123 is also required to be a rounded transition structure.

[0104] In the overlapping relationship of the spring-returning side spring 11 and the pushing side spring 12 of the above-described structure, the angle between the first bent segment 112 and the first pin segment 111 of the spring-returning side spring 11 is higher than the angle between the second bent segment 122 and the second pin segment 121 of the pushing side spring 12. These two angles form a spacing fit in the height direction. Moreover, the included angle between the second bent segment 122 and the second pin segment 121 of the pushing side spring 12 is greater than the included angle between the first bent segment 112 and the first pin segment 111 of the spring-returning side spring 11. In the overlapping relationship of the spring-returning side spring 11 and the pushing side spring 12 of the above-described structure, the angle between the second bent segment 122 and the second pushing segment 123 of the pushing side spring 12 basically coincides with the angle between the first bent segment 112 and the first pushing segment 113 of the spring-returning side spring 11. Thus, between the spring-rebound side spring 11 and the push side spring 12 of the stacked structure spring body 1, an elastic gap 13 is formed, which is obliquely arranged and basically triangular in structure between the pin connection position and the push connection position. One corner of the elastic gap 13 is closed due to the overlapping relationship at the bend between the second bending section 122 and the second pin section 121 of the push side spring 12, and the other corner of the elastic gap 13 is closed due to the overlapping relationship at the bend between the second bending section 122 and the second push section 123 of the push side spring 12. Based on this approximately triangular elastic gap 13, the bent section 122 of the pushing side spring 12 forms a base edge of the elastic gap 13 arranged diagonally. The bent section 112 of the rebounding side spring 11 and the pin section 111 near the bent section 112 form two waist edges of the elastic gap 13. The length of the base edge is greater than the length of the two waist edges, and the two waist edges form the obtuse angle fit relationship required above.

[0105] The specific triangular elastic gap 13 formed between the spring-rebound side spring 11 and the push side spring 12 in the above-mentioned overlapping relationship, due to the waist formed by the bending of the spring-rebound side spring 11, provides a clearance space for the push side spring 12 in service when it deforms in accordance with the thrust, reducing the mutual interference of their structural stresses during compression, and making the bending deformation performance of the moving spring of the overlapping structure excellent. Meanwhile, the push-side spring 12 is matched with a bending angle greater than that of the return-side spring 11 at the corresponding bending part, which effectively improves the adaptability of the push-side spring 12 to bending deformation under the action of thrust. It basically does not cause a reaction force to the return-side spring 11 under the thrust deformation, and has good compliance. This effectively reduces the structural stress of the entire moving spring in the thrust deformation, so that the formed push rod relay is as small as possible. It can achieve the contact closure requirement by basically maintaining the original electromagnetic attraction design. It can be seen that while improving the current carrying capacity, it basically does not increase the electromagnetic attraction of the magnetic circuit. Thus, while meeting the high current carrying capacity technical requirements, it avoids upgrading the design of the magnetic circuit and the overall structural dimensions as much as possible. Of course, the two waist-side bend structures of the above-mentioned spring-rebound side spring 11 at the elastic gap 13 will generate a certain rigid support when bending, that is, enhance the structural rigidity of the spring-rebound side spring 11 compared with the push side spring 12, making the protection of contact closure under the action of thrust more stable, and also constraining and limiting the rebound reaction force of the entire moving spring when the elastic force is released, reducing the phenomenon of contact arcing and secondary conduction caused by the rebound reaction force.

[0106] When the reed body 1 of the above structure is used in a relay, it needs to be assembled with a push card. Therefore, the reed body 1 has a push connection position - namely, a push card through hole 117. In the above-mentioned stacked structure of the reed body 1, in order to accommodate the adjustment of the elastic force, it is not advisable to set the return side spring 11 and the push side spring 12 to be of the same width. Therefore, the width of the push side spring 12 is designed to be smaller than the width of the return side spring 11. In this way, the push side spring 12 can effectively optimize the rebound reaction force of the entire moving spring when the elastic force is released, and reduce the technical requirements for the thrust generated by the electromagnetic attraction force. The specific width differences are mainly reflected in the push connection position and the pin connection position of the spring body 1. That is, in the area of ​​the push section used to form the push card through hole 117, the width of the spring 11 on the return side is greater than the width of the spring 12 on the push side. As for the area of ​​the push section used to form the contact assembly hole, it is set with equal width to ensure the stability of the moving contact assembly. In the area of ​​the pin section used to form the elastic adjustment step 114, the width of the spring 11 on the return side is greater than the width of the spring 12 on the push side. It can be seen that the push card through hole 117 of the spring body 1 is actually formed on both sides of the width direction of the spring 11, and is formed with an outward-facing C-shaped contour structure. The elastic adjustment step 114 of the spring body 1 is actually formed on both sides of the width direction of the spring 11, and is formed with a relatively wider lower side and a relatively narrower upper side. The elastic adjustment step 114 is specifically located at the pin connection position and the elastic gap 13 of the spring body 1.

[0107] The aforementioned spring-side sheet 11 with push-pull hole 117 and elastic adjustment step 114 has a relatively concentrated stress phenomenon because the push-pull hole 117 and elastic adjustment step 114 are recessed at the corresponding edge of the spring-side sheet 11. Based on this phenomenon and the aforementioned width difference fit structure, in order to avoid stress concentration in the entire spring body 1 and the occurrence of plastic deformation or even breakage during repeated thrust deformation, a concave structure and offset clearance notch 124 is formed in the edge region of the push-side spring 12 corresponding to the push-lock hole 117 on the rebound-side spring 11, so that the edge region of the push-side spring 12 corresponding to the push-lock hole 117 on the rebound-side spring 11 is located inside the corresponding push-lock hole 117 and forms a gap fit with the corresponding push-lock hole 117; in the edge region of the push-side spring 12 corresponding to the elastic adjustment step 114 on the rebound-side spring 11, a concave structure and offset clearance notch 125 is formed, so that the edge region of the push-side spring 12 corresponding to the elastic adjustment step 114 on the rebound-side spring 11 is located inside the corresponding elastic adjustment step 114 and forms a gap fit with the corresponding elastic adjustment step 114.

[0108] Regarding the clearance notch 124 on the push-side spring 12 corresponding to the push card through hole 117, in order to reduce the thrust requirement and improve stress concentration, it is not advisable to form a "larger" push card through hole outline structure. Therefore, the clearance notch 124 on the push-side spring 12 is designed as a flat-bottomed concave structure, which has corners 1242 on the top and bottom sides of the concave flat bottom 1241 (vertical edge) in the height direction. These two corners 1242 are located on the inner side of the top and bottom sides of the corresponding push card through hole 117 in the height direction. This makes the clearance notch 124 on the push-side spring 12 fit with the corresponding C-shaped push card through hole 117 on the return-side spring 11 in a rectangular structure that is approximately a recessed groove.

[0109] Regarding the clearance notch 125 on the pushing side spring 12 corresponding to the elastic adjustment step 114, to improve stress concentration, it is not advisable to form a "larger" elastic adjustment step outline structure. Therefore, the clearance notch 125 on the pushing side spring 12 is designed as a flat-bottomed concave structure, which has two edges 1252 on the top and bottom sides of the concave flat bottom 1251 (vertical edge) in the height direction. These two edges 1252 are located on the inner side of the top and bottom sides of the corresponding elastic adjustment step 114 in the height direction. This makes the clearance notch 125 on the pushing side spring 12 match the corresponding stepped elastic adjustment step 114 on the rebound side spring 11 with a rectangular structure that is approximately a recessed groove.

[0110] Based on the aforementioned spring body 1, in order to reduce the elastic reaction force of the rebound spring 11 and constrain the rebound reaction force of the moving spring when the elastic force is released, an elastic adjustment hole 115 is provided on the pin section 111 of the rebound spring 11, 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 on the push section 113 of the rebound spring 11, located at the middle of the push through hole 117 in the width direction.

[0111] The reed body 1 of the above structure has a riveting hole at its pin section for connecting the pin 2, i.e., a pin connection position. The riveting hole penetrates the spring-loaded side spring 11 and the push-side spring 12 in the thickness direction. The pin 2, which constitutes the moving spring, is riveted to the pin connection position of the reed body 1. It is located on the side of the reed body 1 facing the magnetic circuit 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, which is located between the heights of the two corners constituting the elastic gap 13 (i.e., the area between the bend angle of the first bent section 112 of the spring-loaded side spring 11 and the bend angle of the second bent section 122 of the push-side spring 12 and the bend angle of the second pin section 121). Thus, the upper part of pin 2 acts as a backrest and stop for the pin segment of the spring body 1, significantly reducing the spring release reaction force of the spring body 1 due to the stop at the elastic gap 13. This prevents arcing and secondary conduction with the stationary spring assembly caused by excessive spring release reaction force. Of course, to improve the stop rigidity, current carrying capacity, and socket stability of pin 2 on the base, the thickness of pin 2 should be greater than the thickness of spring body 1. It can be molded from a conductive material with higher hardness, so that the higher hardness of pin 2 can stably limit the spring body 1 when assembled on the base.

[0112] See Figure 7 As shown above, the spring body 1 (as shown in serial number a) with an approximately obtuse triangular elastic gap 13 was compared with the spring body (as shown in serial number b) with an approximately right triangular elastic gap, the spring body (as shown in serial number c) with an approximately semi-circular elastic gap, and the spring body (as shown in serial number d) with an approximately parallelogram elastic gap under the same thrust conditions, through stress simulation comparison during thrust deformation. The simulation comparison revealed that the spring body with the approximately right-angled triangular elastic gap shown in number b exhibits significant stacking and delamination during thrust deformation; the spring body with the approximately semi-circular elastic gap shown in number c has a stress of approximately 714.11 at the pushing connection point; and the spring body with the approximately parallelogram elastic gap shown in number d exhibits slight stacking and delamination during thrust deformation, with a stress of approximately 786.61 at the pushing connection point. In contrast, the present invention shown in number a does not exhibit stacking and delamination during thrust deformation, and its stress at the pushing connection point is approximately 672.33, significantly lower than that of the structures shown in numbers c and d, demonstrating a clear advantage.

[0113] Example 2

[0114] See Figure 9As shown, the push rod relay of this utility model has a conversion structure, which includes a base 3 and a coil frame, iron core, coil 4, yoke 5, armature 6, push clip 7, moving spring assembly, normally open stationary spring assembly 8 and normally closed stationary spring assembly 9 assembled on the base 3.

[0115] The magnetic circuit portion, consisting of the iron core, coil 4, yoke 5, and armature 6 arranged on the base 3 at the coil frame, forms a left-right arrangement with the contact portion, consisting of the moving spring assembly, normally open stationary spring assembly 8, and normally closed stationary spring assembly 9, also arranged on the base 3. In the aforementioned contact portion structure, the moving spring assembly is located between the normally closed stationary spring assembly 9 and the normally open stationary spring assembly 8. The normally closed stationary spring assembly 9 is positioned closer to the magnetic circuit portion on the base 3, while the normally open stationary spring assembly 8 is positioned further away from the magnetic circuit portion.

[0116] The pusher 7 is positioned between the armature 6 and the moving spring assembly. The armature 6, which flips on the yoke 5, pushes the pusher 7, causing the normally open contacts of the contact portion to conduct and the normally closed contacts to disconnect. Alternatively, when the moving spring assembly elastically releases, the normally open contacts of the contact portion disconnect and the normally closed contacts conduct, and the moving spring assembly of the contact portion pushes the pusher 7, causing the armature 6 to flip on the yoke 5. Based on the arrangement of the normally closed stationary spring assembly 9 and the normally open stationary spring assembly 8 on the left and right sides of the moving spring assembly, when the pusher 7 engages with the moving spring assembly, it needs to pass through the normally closed stationary spring assembly 9 in the pushing direction. Therefore, the width of the spring leaf of the normally closed stationary spring assembly 9 is smaller than the forked width of the pusher 7 at the end contacting the moving spring assembly, and it is located within the forked space of the pusher 7 at the end contacting the moving spring assembly. Furthermore, the forked depth of the pusher at the end contacting the moving spring assembly is such that when the pusher 7 travels to its maximum stroke in the pushing direction, it basically does not touch the normally closed stationary spring assembly 9.

[0117] The normally open stationary spring assembly 8 is composed of a corresponding stationary spring and a stationary contact.

[0118] The normally closed stationary spring assembly 9 is composed of a corresponding stationary spring and a stationary contact.

[0119] The moving spring assembly consists of a moving spring and a moving contact, as described below.

[0120] To be suitable for high-current operating environments, the moving spring of the above-mentioned moving spring assembly and the stationary spring of the normally open stationary spring assembly 8 are relatively thicker than ordinary moving springs and stationary springs, in order to increase the current carrying area, reduce the current density in the spring during service, and thus reduce the heat generation of the spring, achieving the technical effect of low temperature rise.

[0121] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the moving spring used in the above-mentioned moving spring assembly has a spring body 1 and a pin 2 that are assembled and connected together after being separately formed. In the following structural descriptions, the height direction refers to the height shown in the figure, that is, the state shown with the base as the assembly bottom; the thickness direction refers to the direction of the stacked layers, that is, along the direction of the push card; and the width direction refers to the direction transverse to the direction of the push card. In addition, the expression of the push-side spring 12 mentioned below in this embodiment is based on the normally open stationary spring assembly 8 in the push direction, and is unrelated to the normally closed stationary spring assembly 9.

[0122] To accommodate high current carrying capacity and minimize thrust, the reed body 1 is a composite structure in the thickness direction of the spring-loaded side spring 11 (the side adjacent to the magnetic circuit in the relay structure, i.e., the first spring 11') and the push-side spring 12 (the side adjacent to the normally open stationary spring assembly 8 in the relay structure, i.e., the second spring 12'). To enable low-cost, easy, and high-quality molding of this composite structure, the spring-loaded side spring 11 and the push-side spring 12 of the reed body 1 are integrally bent composite structures, with the bent position of the composite structure located at the top of the contact connection position (i.e., the moving contact connection position) in the height direction.

[0123] In the aforementioned composite structure, the spring-loaded side spring 11 is integrally formed by a lead segment 111, a bending segment 112, and a pushing segment 113. The lead segment 111 serves as a connecting lead 2. The bending segment 112 causes the lead segment 111 and the pushing segment 113 to bend and misalign in the thickness direction of the spring body 1, facilitating the formation of the elastic gap 13 and the corresponding bending deformation during service in response to thrust or spring release. The pushing segment 113 serves as a connection point for arranging the push card—i.e., the push card through-hole 17—and as a connection point for arranging the moving contact. The pushing segment 113 is also the main part that undergoes corresponding bending deformation during service in response to thrust or spring release.

[0124] Under the bending effect of the aforementioned bending section 112, the lead section 111 of the return spring 11 is closer to the magnetic circuit in the relay structure, while the push section 113 is farther away from the magnetic circuit (closer to the normally open stationary spring assembly 8) in the relay structure. To accommodate the electromagnetic attraction design requirements of thrust deformation and reduce the thrust generated on the magnetic circuit, the bending section 112 is an oblique bending transition structure where the lead section 111 is closer to the magnetic circuit in the relay structure and the push section 113 is farther away from the magnetic circuit in the relay structure. That is, the bending section 112 and the lead section 111 form an obtuse angle fit, and the bending section 112 and the push section 113 also form an obtuse angle fit. To avoid stress concentration at the bending point of the return spring 11, the angle between the bending section 112 and the lead section 111 is required to be a rounded transition structure, and the angle between the bending section 112 and the push section 113 is also a rounded transition structure. As a key part that helps to generate bending deformation and constrain the elastic release reaction force of the side spring 12, the angle between the aforementioned bending section 112 and the pin section 111 is reasonably selected in the range of 110 to 150° (e.g., 110°, 120°, 130°, 140° or 150°, etc.).

[0125] In the aforementioned composite structure, the push-side spring 12 is integrally formed by a second pin segment 121, a second bending segment 122, and a second push segment 123. The second pin segment 121 is used to connect the pin 2 in conjunction with the first pin segment 111. The second bending segment 122 causes the second pin segment 121 and the second push segment 123 to bend and misalign in the thickness direction of the spring body 1, facilitating the formation of the elastic gap 13 and allowing for corresponding bending deformation during service in response to thrust or spring release. The second push segment 123 is used to arrange the connection position of the push card and the connection position of the moving contact. The second push segment 123 is also the main part that undergoes corresponding bending deformation during service in response to thrust or spring release.

[0126] Under the bending effect of the aforementioned bending section 122, the pin section 121 of the push-side spring 12 is closer to the magnetic circuit in the relay structure, while the push section 123 is farther away from the magnetic circuit (closer to the normally open stationary spring assembly 8) in the relay structure. To adapt to the electromagnetic attraction design requirements of thrust deformation and reducing the thrust generated on the magnetic circuit, the bending section 122 is an oblique bending transition structure where the pin section 121 is closer to the magnetic circuit in the relay structure and the push section 123 is farther away from the magnetic circuit in the relay structure. That is, the bending section 122 and the pin section 121 form an obtuse angle fit, and the bending section 122 and the push section 123 also form an obtuse angle fit. To avoid stress concentration at the bending point of the push-side spring 12, the angle between the bending section 122 and the pin section 121 is required to be a rounded transition structure, and the angle between the bending section 122 and the push section 123 is also a rounded transition structure.

[0127] In the overlapping relationship of the spring-returning side spring 11 and the pushing side spring 12 of the above-described structure, the angle between the first bent segment 112 and the first pin segment 111 of the spring-returning side spring 11 is higher than the angle between the second bent segment 122 and the second pin segment 121 of the pushing side spring 12. These two angles form a spacing fit in the height direction. Moreover, the included angle between the second bent segment 122 and the second pin segment 121 of the pushing side spring 12 is greater than the included angle between the first bent segment 112 and the first pin segment 111 of the spring-returning side spring 11. In the overlapping relationship of the spring-returning side spring 11 and the pushing side spring 12 of the above-described structure, the angle between the second bent segment 122 and the second pushing segment 123 of the pushing side spring 12 basically coincides with the angle between the first bent segment 112 and the first pushing segment 113 of the spring-returning side spring 11. Thus, between the spring-rebound side spring 11 and the push side spring 12 of the stacked structure spring body 1, an elastic gap 13 is formed, which is obliquely arranged and basically triangular in structure between the pin connection position and the push connection position. One corner of the elastic gap 13 is closed due to the overlapping relationship at the bend between the second bending section 122 and the second pin section 121 of the push side spring 12, and the other corner of the elastic gap 13 is closed due to the overlapping relationship at the bend between the second bending section 122 and the second push section 123 of the push side spring 12. Based on this approximately triangular elastic gap 13, the bent section 122 of the pushing side spring 12 forms a base edge of the elastic gap 13 arranged diagonally. The bent section 112 of the rebounding side spring 11 and the pin section 111 near the bent section 112 form two waist edges of the elastic gap 13. The length of the base edge is greater than the length of the two waist edges, and the two waist edges form the obtuse angle fit relationship required above.

[0128] The specific triangular elastic gap 13 formed between the spring-rebound side spring 11 and the push side spring 12 in the above-mentioned overlapping relationship, due to the waist formed by the bending of the spring-rebound side spring 11, provides a clearance space for the push side spring 12 in service when it deforms in accordance with the thrust, reducing the mutual interference of their structural stresses during compression, and making the bending deformation performance of the moving spring of the overlapping structure excellent. Meanwhile, the push-side spring 12 is matched with a bending angle greater than that of the return-side spring 11 at the corresponding bending part, which effectively improves the adaptability of the push-side spring 12 to bending deformation under the action of thrust. It basically does not cause a reaction force to the return-side spring 11 under the thrust deformation, and has good compliance. This effectively reduces the structural stress of the entire moving spring in the thrust deformation, so that the formed push rod relay is as small as possible. It can achieve the contact closure requirement by basically maintaining the original electromagnetic attraction design. It can be seen that while improving the current carrying capacity, it basically does not increase the electromagnetic attraction of the magnetic circuit. Thus, while meeting the high current carrying capacity technical requirements, it avoids upgrading the design of the magnetic circuit and the overall structural dimensions as much as possible. Of course, the two waist-side bend structures of the above-mentioned spring-rebound side spring 11 at the elastic gap 13 will generate a certain rigid support when bending, that is, enhance the structural rigidity of the spring-rebound side spring 11 compared with the push side spring 12, making the protection of contact closure under the action of thrust more stable, and also constraining and limiting the rebound reaction force of the entire moving spring when the elastic force is released, reducing the phenomenon of contact arcing and secondary conduction caused by the rebound reaction force.

[0129] When the reed body 1 of the above structure is used in a relay, it needs to be assembled with a push card. Therefore, the reed body 1 has a push connection position - namely, a push card through hole 117. In the above-mentioned stacked structure of the reed body 1, in order to accommodate the adjustment of the elastic force, it is not advisable to set the return side spring 11 and the push side spring 12 to be of the same width. Therefore, the width of the push side spring 12 is designed to be smaller than the width of the return side spring 11. In this way, the push side spring 12 can effectively optimize the rebound reaction force of the entire moving spring when the elastic force is released, and reduce the technical requirements for the thrust generated by the electromagnetic attraction force. The specific width differences are mainly reflected in the push connection position and the pin connection position of the spring body 1. That is, in the area of ​​the push section used to form the push card through hole 117, the width of the spring 11 on the return side is greater than the width of the spring 12 on the push side. As for the area of ​​the push section used to form the contact assembly hole, it is set with equal width to ensure the stability of the moving contact assembly. In the area of ​​the pin section used to form the elastic adjustment step 114, the width of the spring 11 on the return side is greater than the width of the spring 12 on the push side. It can be seen that the push card through hole 117 of the spring body 1 is actually formed on both sides of the width direction of the spring 11, and is formed with an outward-facing C-shaped contour structure. The elastic adjustment step 114 of the spring body 1 is actually formed on both sides of the width direction of the spring 11, and is formed with a relatively wider lower side and a relatively narrower upper side. The elastic adjustment step 114 is specifically located at the pin connection position and the elastic gap 13 of the spring body 1.

[0130] The aforementioned spring-side sheet 11 with push-pull hole 117 and elastic adjustment step 114 has a relatively concentrated stress phenomenon because the push-pull hole 117 and elastic adjustment step 114 are recessed at the corresponding edge of the spring-side sheet 11. Based on this phenomenon and the aforementioned width difference fit structure, in order to avoid stress concentration in the entire spring body 1 and the occurrence of plastic deformation or even breakage during repeated thrust deformation, a concave structure and offset clearance notch 124 is formed in the edge region of the push-side spring 12 corresponding to the push-lock hole 117 on the rebound-side spring 11, so that the edge region of the push-side spring 12 corresponding to the push-lock hole 117 on the rebound-side spring 11 is located inside the corresponding push-lock hole 117 and forms a gap fit with the corresponding push-lock hole 117; in the edge region of the push-side spring 12 corresponding to the elastic adjustment step 114 on the rebound-side spring 11, a concave structure and offset clearance notch 125 is formed, so that the edge region of the push-side spring 12 corresponding to the elastic adjustment step 114 on the rebound-side spring 11 is located inside the corresponding elastic adjustment step 114 and forms a gap fit with the corresponding elastic adjustment step 114.

[0131] Regarding the clearance notch 124 on the push-side spring 12 corresponding to the push card through hole 117, in order to reduce the thrust requirement and improve stress concentration, it is not advisable to form a "larger" push card through hole outline structure. Therefore, the clearance notch 124 on the push-side spring 12 is designed as a flat-bottomed concave structure, which has corners 1242 on the top and bottom sides of the concave flat bottom 1241 (vertical edge) in the height direction. These two corners 1242 are located on the inner side of the top and bottom sides of the corresponding push card through hole 117 in the height direction. This makes the clearance notch 124 on the push-side spring 12 fit with the corresponding C-shaped push card through hole 117 on the return-side spring 11 in a rectangular structure that is approximately a recessed groove.

[0132] Regarding the clearance notch 125 on the pushing side spring 12 corresponding to the elastic adjustment step 114, to improve stress concentration, it is not advisable to form a "larger" elastic adjustment step outline structure. Therefore, the clearance notch 125 on the pushing side spring 12 is designed as a flat-bottomed concave structure, which has two edges 1252 on the top and bottom sides of the concave flat bottom 1251 (vertical edge) in the height direction. These two edges 1252 are located on the inner side of the top and bottom sides of the corresponding elastic adjustment step 114 in the height direction. This makes the clearance notch 125 on the pushing side spring 12 match the corresponding stepped elastic adjustment step 114 on the rebound side spring 11 with a rectangular structure that is approximately a recessed groove.

[0133] Based on the aforementioned spring body 1, in order to reduce the elastic reaction force of the rebound spring 11 and constrain the rebound reaction force of the moving spring when the elastic force is released, an elastic adjustment hole 115 is provided on the pin section of the rebound spring 11, 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 on the pushing section of the rebound spring 11, located at the middle of the pushing through hole 117 in the width direction.

[0134] The reed body 1 of the above structure has a riveting hole at its pin section for connecting the pin 2, i.e., a pin connection position. The riveting hole penetrates the spring-loaded side spring 11 and the push-side spring 12 in the thickness direction. The pin 2, which constitutes the moving spring, is riveted to the pin connection position of the reed body 1. It is located on the side of the reed body 1 facing the magnetic circuit 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, which is located between the heights of the two corners constituting the elastic gap 13 (i.e., the area between the bend angle of the first bent section 112 of the spring-loaded side spring 11 and the bend angle of the second bent section 122 of the push-side spring 12 and the bend angle of the second pin section 121). Thus, the upper part of pin 2 acts as a backrest and stop for the pin segment of the spring body 1, significantly reducing the spring release reaction force of the spring body 1 due to the stop at the elastic gap 13. This prevents arcing and secondary conduction with the stationary spring assembly caused by excessive spring release reaction force. Of course, to improve the stop rigidity, current carrying capacity, and socket stability of pin 2 on the base, the thickness of pin 2 should be greater than the thickness of spring body 1. It can be molded from a conductive material with higher hardness, so that the higher hardness of pin 2 can stably limit the spring body 1 when assembled on the base.

[0135] Example 3

[0136] The rest of the content of this embodiment is the same as that of embodiment 1 or embodiment 2, except that:

[0137] The pins are connected to the lead section of the reed body, and their tips extend to the lower side of the elastic gap of the reed body, with a height of about 2mm between the pins and the lowest point of the elastic gap.

[0138] Example 4

[0139] The rest of the content of this embodiment is the same as that of embodiment 1 or embodiment 2, except that:

[0140] The pins are connected to the lead section of the reed body, and their tips extend to the lower side of the elastic gap of the reed body, with a height of about 1 mm between them and the lowest point of the elastic gap.

[0141] Example 5

[0142] The rest of the content of this embodiment is the same as that of embodiment 1 or embodiment 2, except that:

[0143] The clearance notch at the pin segment of the push side spring is designed as a C-shaped profile structure, surrounding the inner periphery of the elastic adjustment step.

[0144] Example 6

[0145] The rest of the content of this embodiment is the same as that of embodiment 1 or embodiment 2, except that:

[0146] Remove the second clearance notch at the push-side spring pin segment.

[0147] Of course, its effect in improving stress concentration will also be reduced when it is removed.

[0148] Example 7

[0149] The rest of the content of this embodiment is the same as that of embodiment 1 or embodiment 2, except that:

[0150] Remove the elastic adjustment hole one and / or elastic adjustment hole two from the spring plate on the rebound side.

[0151] Of course, its effect of adjusting the elasticity of the rebound spring will also be eliminated by removing it.

[0152] Example 8

[0153] The rest of the content of this embodiment is the same as that of embodiment 1 or embodiment 2, except that:

[0154] Remove the clearance notch at the push section of the push side spring to match the push-lock hole of the return side spring.

[0155] Of course, its effect of improving stress concentration will also be reduced by removal, but fortunately, it increases thrust.

[0156] Example 9

[0157] The other contents of this embodiment are the same as those of Embodiment 1 or Embodiment 2, except that the spring body of the moving spring assembly has a three-layer stacked structure.

[0158] See Figure 10 and Figure 11 As shown (horizontal perspective, see [reference]) Figure 4 , Figure 5 and Figure 6 As shown, the spring body 1 of the moving spring assembly is a stacked 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 the side adjacent to the magnetic circuit portion in the relay structure. The third spring 13' is located on the side adjacent to the normally open stationary spring assembly 8 in the relay structure. The second spring 12' is located between the first spring 11' and the third spring 13'.

[0159] In the above-mentioned three-layer composite reed body 1, the first reed 11' and the second reed 12' are arranged adjacently, forming a specific triangular elastic gap 13 between them; the second reed 12' and the third reed 13' are arranged adjacently, forming a specific triangular elastic gap 13 between them. Therefore, for clarity, based on the specific triangular elastic gap 13, the first reed 11', the second reed 12', and the third reed 13' are divided into two groups in the thickness direction according to their adjacent positions. That is, the first group of adjacent positions is formed by the overlapping of the first reed 11' and the second reed 12', and the second group of adjacent positions is formed by the overlapping of the second reed 12' and the third reed 13'.

[0160] According to the above grouping, the arrangement of the first reed 11' and the second reed 12' in the first group of adjacent positions in the relay structure is such that the first reed 11' is arranged relatively close to the magnetic circuit portion, and the second reed 12' is arranged relatively far from the magnetic circuit portion and close to the normally open stationary spring assembly. Therefore, in order to compare with the description of the reed body structure in Embodiments 1 and 2 above, the first reed 11' is defined as the rebound side reed in the first group of adjacent positions, and the second reed 12' is defined as the push side reed in the first group of adjacent positions.

[0161] In the first set of adjacent overlapping structures, the spring-loaded side spring is integrally formed by a pin segment, a bent segment, and a pushing segment. The pin segment serves as a connecting pin. The bent segment causes the pin segment and the pushing segment to bend and misalign in the thickness direction of the spring body, facilitating the formation of the elastic gap 13 and the corresponding bending deformation during service in response to thrust or spring release. The pushing segment serves as a connection point for arranging the push card—i.e., the push card through-hole—and as a connection point for arranging the moving contact. The pushing segment is also the main part that undergoes corresponding bending deformation during service in response to thrust or spring release.

[0162] Under the influence of the bending section 1 described above, the lead section 1 of the return spring is closer to the magnetic circuit in the relay structure, while the push section 1 is farther away from the magnetic circuit (closer to the normally open stationary spring assembly). To accommodate the thrust deformation and reduce the electromagnetic attraction force design requirements of the thrust generated on the magnetic circuit, the bending section 1 is a slanted bending transition structure where the lead section 1 is closer to the magnetic circuit in the relay structure and the push section 1 is farther away from the magnetic circuit in the relay structure. That is, the bending section 1 and the lead section 1 form an obtuse angle fit, and the bending section 1 and the push section 1 also form an obtuse angle fit. To avoid stress concentration in the return spring at the bending point, the angle between the bending section 1 and the lead section 1 is required to be a rounded transition structure, and the angle between the bending section 1 and the push section 1 is also a rounded transition structure. As a key part that helps the side spring to bend and deform and to restrain the elastic release reaction force, the angle between the aforementioned bending section one and the pin section one is reasonably selected within the range of 110 to 150° (e.g., 110°, 120°, 130°, 140° or 150°, etc.).

[0163] In the aforementioned first group of adjacent overlapping structures, the push-side spring is integrally formed by pin segment two, bending segment two, and push segment two. Pin segment two is used to connect the pins in conjunction with pin segment one. Bending segment two causes pin segment two and push segment two to bend and misalign in the thickness direction of the spring body, facilitating the formation of the elastic gap 13 and the corresponding bending deformation during service in response to thrust or spring release. Push segment two is used to arrange the connection position of the push card and the connection position of the moving contact, and is also the main part that undergoes corresponding bending deformation during service in response to thrust or spring release.

[0164] Under the bending effect of the aforementioned second bending segment, the second pin segment of the push-side spring is closer to the magnetic circuit portion in the relay structure, while the second push segment is farther away from the magnetic circuit portion (closer to the normally open stationary spring assembly). To accommodate the thrust deformation and reduce the electromagnetic attraction design requirements of the thrust generated on the magnetic circuit portion, the second bending segment is a slanted bending transition structure where the second pin segment is closer to the magnetic circuit portion in the relay structure, and the second push segment is farther away from the magnetic circuit portion. That is, the second bending segment and the second pin segment form an obtuse angle fit, and the second bending segment and the second push segment also form an obtuse angle fit. To avoid stress concentration at the bending point of the push-side spring, the angle between the second bending segment and the second pin segment is required to be a rounded transition structure, and the angle between the second bending segment and the second push segment is also a rounded transition structure.

[0165] In the first set of adjacent overlapping relationships between the spring-loaded side spring and the push-side spring of the above-described structure, the angle between the first bent segment and the first pin segment of the spring-loaded side spring is higher than the angle between the second bent segment and the second pin segment of the push-side spring. These two angles form a spacing match in the height direction. Moreover, the included angle between the second bent segment and the second pin segment of the push-side spring is greater than the included angle between the first bent segment and the first pin segment of the spring-loaded side spring. In the overlapping relationship between the spring-loaded side spring and the push-side spring of the above-described structure, the angle between the second bent segment and the second push segment of the push-side spring is substantially the same as the angle between the first bent segment and the first push segment of the spring-loaded side spring. Thus, in the first set of adjacent overlapping structures, an elastic gap 13 is formed between the rebound spring and the push spring, arranged obliquely and basically in a triangular structure between the pin connection position and the push connection position. One corner of the elastic gap 13 closes due to the overlapping relationship at the bend between the second bent section of the push spring and the second pin section. The other corner of the elastic gap 13 also closes due to the overlapping relationship at the bend between the second bent section of the push spring and the second push section. Based on this approximately triangular elastic gap 13, the second bent section of the push spring forms one base of the obliquely arranged elastic gap 13, and the first bent section of the rebound spring and the part of the first pin section near the first bent section form two waists of the elastic gap 13. The length of the base is greater than the length of the two waists, and the two waists form the obtuse angle fit relationship required above.

[0166] The specific triangular elastic gap 13 formed between the spring-side and push-side springs in the first group of adjacent overlapping structures, due to the waist formed by the bending of the spring-side spring, provides clearance space for the push-side spring during service when it deforms in accordance with thrust. This reduces the interference of their structural stresses during compression, resulting in excellent bending deformation performance of the moving spring in the overlapping structure. Simultaneously, the push-side spring forms a larger bending angle than the spring-side spring at the corresponding bending point, effectively improving the adaptability of the push-side spring to bending deformation under thrust. It essentially does not cause a reaction force to the spring-side spring during thrust deformation, exhibiting good compliance. This effectively reduces the structural stress of the entire moving spring during thrust deformation, allowing the resulting push-rod relay to have a minimal thrust, essentially maintaining the original electromagnetic attraction design to achieve contact closure requirements. Therefore, while improving current-carrying capacity, it does not significantly increase the electromagnetic attraction of the magnetic circuit, thus meeting high current-carrying technical requirements while minimizing the need for upgrades to the magnetic circuit and overall structural dimensions. Of course, the two waist-side bend structures at the elastic gap 13 of the above-mentioned rebound side spring will generate a certain rigid support when bending, that is, enhance the structural rigidity of the rebound side spring compared with the push side spring, make the guarantee of contact closure under the action of thrust more stable, and also constrain and limit the rebound reaction force of the entire moving spring when the spring force is released, reducing the phenomenon of contact arcing and secondary conduction caused by the rebound reaction force.

[0167] 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 as follows: the second reed 12' is arranged relatively close to the magnetic circuit portion, and the third reed 13' is arranged relatively far from the magnetic circuit portion and close to the normally open stationary spring assembly. Therefore, in order to compare with the description of the reed body structure in Embodiments 1 and 2 above, the second reed 12' is defined as the rebound side reed in the second group of adjacent positions, and the third reed 13' is defined as the push side reed in the second group of adjacent positions.

[0168] In the second set of adjacent overlapping structures, the spring-loaded side spring is integrally formed by a pin segment, a bent segment, and a pushing segment. The pin segment serves as a connecting pin. The bent segment causes the pin segment and the pushing segment to bend and misalign in the thickness direction of the spring body, facilitating the formation of the elastic gap 13 and the corresponding bending deformation during service in response to thrust or spring release. The pushing segment serves as a connection point for arranging the push card—i.e., the push card through-hole—and as a connection point for arranging the moving contact. The pushing segment is also the main part that undergoes corresponding bending deformation during service in response to thrust or spring release.

[0169] Under the influence of the bending section 1 described above, the lead section 1 of the return spring is closer to the magnetic circuit in the relay structure, while the push section 1 is farther away from the magnetic circuit (closer to the normally open stationary spring assembly). To accommodate the thrust deformation and reduce the electromagnetic attraction force design requirements of the thrust generated on the magnetic circuit, the bending section 1 is a slanted bending transition structure where the lead section 1 is closer to the magnetic circuit in the relay structure and the push section 1 is farther away from the magnetic circuit in the relay structure. That is, the bending section 1 and the lead section 1 form an obtuse angle fit, and the bending section 1 and the push section 1 also form an obtuse angle fit. To avoid stress concentration in the return spring at the bending point, the angle between the bending section 1 and the lead section 1 is required to be a rounded transition structure, and the angle between the bending section 1 and the push section 1 is also a rounded transition structure. As a key part that helps the side spring to bend and deform and to restrain the elastic release reaction force, the angle between the aforementioned bending section one and the pin section one is reasonably selected within the range of 110 to 150° (e.g., 110°, 120°, 130°, 140° or 150°, etc.).

[0170] In the aforementioned second set of adjacent overlapping structures, the push-side spring is integrally formed by pin segment two, bending segment two, and push segment two. Pin segment two is used to connect the pins in conjunction with pin segment one. Bending segment two causes pin segment two and push segment two to bend and misalign in the thickness direction of the spring body, facilitating the formation of the elastic gap 13 and the corresponding bending deformation during service in response to thrust or spring release. Push segment two is used to arrange the connection position of the push card and the connection position of the moving contact, and is also the main part that undergoes corresponding bending deformation during service in response to thrust or spring release.

[0171] Under the bending effect of the aforementioned second bending segment, the second pin segment of the push-side spring is closer to the magnetic circuit portion in the relay structure, while the second push segment is farther away from the magnetic circuit portion (closer to the normally open stationary spring assembly). To accommodate the thrust deformation and reduce the electromagnetic attraction design requirements of the thrust generated on the magnetic circuit portion, the second bending segment is a slanted bending transition structure where the second pin segment is closer to the magnetic circuit portion in the relay structure, and the second push segment is farther away from the magnetic circuit portion. That is, the second bending segment and the second pin segment form an obtuse angle fit, and the second bending segment and the second push segment also form an obtuse angle fit. To avoid stress concentration at the bending point of the push-side spring, the angle between the second bending segment and the second pin segment is required to be a rounded transition structure, and the angle between the second bending segment and the second push segment is also a rounded transition structure.

[0172] In the second set of adjacent overlapping relationships between the spring-loaded side spring and the push-side spring of the above-described structure, the angle between the first bent segment and the first pin segment of the spring-loaded side spring is higher than the angle between the second bent segment and the second pin segment of the push-side spring. These two angles form a spacing match in the height direction. Moreover, the included angle between the second bent segment and the second pin segment of the push-side spring is greater than the included angle between the first bent segment and the first pin segment of the spring-loaded side spring. In the overlapping relationship between the spring-loaded side spring and the push-side spring of the above-described structure, the angle between the second bent segment and the second push segment of the push-side spring essentially coincides with the angle between the first bent segment and the first push segment of the spring-loaded side spring. Thus, in the second set of adjacent overlapping structures, an elastic gap 13 is formed between the rebound spring and the push spring, arranged obliquely and forming a basic triangular structure between the pin connection position and the push connection position. One corner of this elastic gap 13 closes due to the overlapping relationship at the angle between the bent section two of the push spring and the pin section two. The other corner of this elastic gap 13 also closes due to the overlapping relationship at the angle between the bent section two of the push spring and the push section two. Based on this approximately triangular elastic gap 13, the bent section two of the push spring forms one base of the obliquely arranged elastic gap 13, and the bent section one of the rebound spring and the pin section one near the bent section one form two waists of the elastic gap 13. The length of the base is greater than the length of the two waists, and the two waists form the obtuse angle fit relationship required above.

[0173] The specific triangular elastic gap 13 formed between the rebound side spring and the push side spring in the second group of adjacent overlapping positions, due to the waist formed by the bending of the rebound side spring, provides clearance space for the push side spring during service when it deforms in accordance with the thrust, reducing the interference of their structural stresses during compression, and making the bending deformation performance of the moving spring in the overlapping structure excellent. At the same time, the push side spring forms a larger bending angle than the rebound side spring at the corresponding bending position, which effectively improves the performance of the push side spring in adapting to bending deformation under the action of thrust. It basically does not cause a reaction force to the rebound side spring during thrust deformation, and has good compliance. This effectively reduces the structural stress of the entire moving spring during thrust deformation, so that the resulting push rod relay is as small as possible, and the thrust required to achieve contact closure can be basically maintained while keeping the original electromagnetic attraction design. It can be seen that while improving the current carrying capacity, it basically does not increase the electromagnetic attraction of the magnetic circuit, thus meeting the high current carrying capacity technical requirements while avoiding the need to upgrade the design of the magnetic circuit and the overall structural dimensions as much as possible. Of course, the two waist-side bend structures at the elastic gap 13 of the above-mentioned rebound side spring will generate a certain rigid support when bending, that is, enhance the structural rigidity of the rebound side spring compared with the push side spring, make the guarantee of contact closure under the action of thrust more stable, and also constrain and limit the rebound reaction force of the entire moving spring when the spring force is released, reducing the phenomenon of contact arcing and secondary conduction caused by the rebound reaction force.

[0174] The overlapping structure of the spring body 1, consisting of the first spring 11', the second spring 12', and the third spring 13' arranged in two adjacent positions, forms two layered, approximately triangular elastic gaps 13 in the region between the pin connection position and the push connection position. The bent structure of the first spring 11' forms the two sides of the first triangular elastic gap 13, and the bent structure of the second spring 12' forms the base of the first triangular elastic gap 13. The bent structure of the second spring 12' forms the two sides of the second triangular elastic gap 13, and the bent structure of the third spring 13' forms the base of the second triangular elastic gap 13. This results in the base length of the second triangular elastic gap 13 being greater than the base length of the first triangular elastic gap 13; and the included angle between the apex angles of the two sides of the second triangular elastic gap 13 being greater than the included angle between the apex angles of the two sides of the first triangular elastic gap 13. The two triangular elastic gaps 13 tend to be arranged at the same height in the pushing direction, but the two triangular elastic gaps are different in the height direction. The closing angle of the second triangular elastic gap 13 in the height direction is lower than that of the first triangular elastic gap 13 in the height direction.

[0175] The above describes a specific stacking structure of three spring sheets in the thickness direction. The following section discusses the forming of the push connection point in the stacked three-spring structure, as well as the stress concentration prevention structure.

[0176] When the reed body 1 with the above structure is used in a relay, it needs to be assembled with a push card, and therefore the reed body 1 has a push connection position - that is, a push card through hole 117.

[0177] In the above-mentioned stacked structure of the reed body 1, in order to adapt to the elastic force adjustment, it is not advisable to set the first reed 11', the second reed 12', and the third reed 13' to be of the same width. Therefore, the width of the second reed 12' and the third reed 13' is designed to be smaller than the width of the first reed 11'. Of course, the second reed 12' and the third reed 13' can be formed to the same width. In this way, the rebound reaction force of the entire moving reed when the elastic force is released can be effectively optimized by using the second reed 12' and the third reed 13', thereby reducing the technical requirements for the thrust generated by the electromagnetic attraction force. The specific width differences are mainly reflected in the push connection position and the pin connection position of the reed body 1. That is, in the area of ​​the push section used to form the push card through hole 117, the width of the first reed 11' is greater than the width of the second reed 12' and the third reed 13', respectively. As for the area of ​​the push section used to form the contact assembly hole, it is set with equal width to ensure the stability of the moving contact assembly. In the area of ​​the pin section used to form the elastic adjustment step 114, the width of the first reed 11' is greater than the width of the second reed 12' and the third reed 13', respectively. It can be seen that the push card through hole 117 of the reed body 1 is actually formed on both sides of the width direction of the first reed 11', and is formed with an outward-facing C-shaped contour structure. The elastic adjustment step 114 of the reed body 1 is actually formed on both sides of the width direction of the first reed 11', with a step concave structure that is relatively wider on the lower side and relatively narrower on the upper side (see details). Figure 4 , Figure 5 and Figure 6 As shown, the elastic adjustment step 114 is specifically located between the pin connection position of the spring body 1 and the elastic gap 13.

[0178] The first spring 11', which has a push-lock hole 117 and an elastic adjustment step 114, experiences stress concentration because the push-lock hole 117 and the elastic adjustment step 114 are recessed at their corresponding edges. Based on this phenomenon and the aforementioned width-difference fit structure, to avoid stress concentration throughout the spring body 1 and prevent plastic deformation or even breakage during repeated thrust deformation, the second spring 12' and the third spring 13', corresponding to the push-lock hole 117 on the first spring 11', are respectively formed with recessed clearance notches 124 offset from the corresponding push-lock hole 117 (see details). Figure 4 , Figure 5 and Figure 6As shown), the second spring 12' and the third spring 13' respectively correspond to the edge region of the push card hole 117 on the first spring 11', located inside the corresponding push card hole 117 and forming a gap fit with the corresponding push card hole 117; in the edge region of the elastic adjustment step 114 on the first spring 11', the second spring 12' and the third spring 13' respectively correspond to the edge region of the elastic adjustment step 114 on the first spring 11', a recessed clearance notch 125 is formed, which is offset from the corresponding elastic adjustment step 114 (see details). Figure 4 , Figure 5 and Figure 6 As shown), the second spring 12' and the third spring 13' are respectively located on the edge region of the elastic adjustment step 114 on the first spring 11', and are located inside the corresponding elastic adjustment step 114, forming a gap fit with the corresponding elastic adjustment step 114.

[0179] Regarding the clearance notches 124 on the second spring 12' and the third spring 13' corresponding to the push card through hole 117, to reduce the thrust requirement and improve stress concentration, it is not advisable to form a "larger" push card through hole outline structure. Therefore, the clearance notches 124 on the second spring 12' and the third spring 13' are designed as flat-bottomed concave structures, which have corners 1242 on the top and bottom sides of the concave flat bottom 1241 (vertical edge) in the height direction (see details). Figure 4 , Figure 5 and Figure 6 As shown), these two corners 1242 are located on the inner sides of the top and bottom sides of the corresponding push card through hole 117 in the height direction. This makes the clearance notches 124 on the second spring 12' and the third spring 13' respectively cooperate with the corresponding C-shaped push card through hole 117 on the first spring 11' in a rectangular structure that is approximately a recessed groove.

[0180] Regarding the clearance notches 125 on the second spring 12' and the third spring 13' corresponding to the elastic adjustment step 114, to improve stress concentration, it is not advisable to form a "larger" elastic adjustment step outline structure. Therefore, the clearance notches 125 on the second spring 12' and the third spring 13' are designed as flat-bottomed concave structures, which have two edges 1252 on the top and bottom sides of the concave flat bottom 1251 (vertical edge) in the height direction (see details). Figure 4 , Figure 5 and Figure 6 As shown), these 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. This makes the clearance notches 125 on the second spring 12' and the third spring 13' respectively cooperate with the corresponding stepped elastic adjustment step 114 on the first spring 11' in a rectangular structure that is approximately a recessed groove.

[0181] Based on the aforementioned reed body 1, in order to reduce the elastic reaction force of the first reed 11' and constrain the rebound reaction force of the moving reed when the elastic force is released, an elastic adjustment hole 115 is provided on the pin section of the first reed 11', located on the top side of the pin connection position in the height direction and basically in the center area of ​​the width (see details). Figure 4 and Figure 5 As shown); and in the pushing section of the first spring 11', an elastic adjustment hole 2 116 is provided at the middle of the pushing through hole 117 in the width direction (see details). Figure 4 and Figure 5 (As shown).

[0182] Through the above description of the design schemes for the push connection position and the pin connection position, it can be clearly seen that in the stacked 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', while 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 two springs with basically the same structure stacked in the thickness direction (the triangular elastic gap at the bend is different).

[0183] The reed body 1 of the above structure has a riveting hole at its pin section for connecting the pins—that is, a pin connection position. This riveting hole extends through the first reed 11', the second reed 12', and the third reed 13' in the thickness direction. The pins constituting the moving reed are riveted together and connected to the pin connection position of the reed body 1, located on the side of the reed body 1 facing the magnetic circuit 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, located between the heights of the two corners forming the second triangular elastic gap 13. In this way, the upper part of the pin provides a back support and stop for the pin section of the reed body 1, so that the reed body 1, when the elastic force is released and rebounds, is stopped and limited at the elastic gap 13, which greatly reduces the elastic release reaction force and avoids arcing and secondary conduction with the stationary spring assembly due to 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. 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 it is assembled on the base.

[0184] Example 10

[0185] The structure of the moving spring assembly in this embodiment is the same as that in Embodiment 1 or Embodiment 9, except that a push rod relay is used in this moving spring assembly.

[0186] In this embodiment, the push rod relay using the moving spring assembly is a normally closed structure, which includes a base and a coil frame, iron core, coil, yoke, armature, push clip, moving spring assembly and normally closed stationary spring assembly mounted on the base.

[0187] The magnetic circuit portion, consisting of the iron core, coil, yoke, and armature arranged on the base at the coil frame, and the contact portion, consisting of the moving spring assembly and the normally closed stationary spring assembly, are arranged in a left-right configuration on the base. In the aforementioned contact portion structure, the normally closed stationary spring assembly is positioned close to the magnetic circuit portion on the base, while the moving spring assembly is positioned further away from the magnetic circuit portion.

[0188] The pusher is positioned between the armature and the moving spring assembly. The armature, which flips on the yoke, pushes the pusher, causing the normally closed contact of the contact portion to open. Alternatively, when the moving spring assembly elastically releases, the normally closed contact of the contact portion opens, and the moving spring assembly of the contact portion pushes the pusher, causing the armature to flip on the yoke. Based on the above arrangement of the normally closed stationary spring assembly between the magnetic circuit and the moving spring assembly, when the pusher engages with the moving spring assembly, it needs to pass through the normally closed stationary spring assembly in the pushing direction. Therefore, the width of the spring leaf of the normally closed stationary spring assembly is smaller than the forked width of the pusher at the end contacting the moving spring assembly, and it is located within the forked space of the pusher at the end contacting the moving spring assembly. Furthermore, the forked depth of the pusher at the end contacting the moving spring assembly essentially does not touch the normally closed stationary spring assembly when the pusher travels to its maximum stroke in the pushing direction.

[0189] The above embodiments are only used to illustrate the present invention and are not intended to limit it. Of course, in terms of effectiveness, Embodiment 1 is the best implementation of the present invention.

[0190] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications can still be made to the above embodiments, or equivalent substitutions can be made to some of the technical features, such as forming a four-piece spring stacked structure based on embodiment 9; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the present invention.

Claims

1. A high-load flow reed having a reed body (1). The reed body (1) is a structure of at least two reeds stacked in the thickness direction; In the stacked structure of the reed body (1), the two reeds arranged in adjacent positions are divided into a spring-rebound side reed (11) and a spring-push side reed (12) according to the pushing and rebounding direction of the moving reed. Its features are: Between the spring-loaded side spring (11) and the push-side spring (12) arranged in adjacent positions, there is an elastic gap (13) in the form of a triangle between the pin connection position and the push connection position. Furthermore, the push-side spring (12) forms one bottom edge of the elastic gap (13); The rebound side spring (11) forms the two waist sides of the elastic gap (13); The length of the base is greater than the length of each of the two waist sides.

2. The high-load flow reed according to claim 1, characterized in that: In the relay structure, the spring-loaded side springs (11) arranged in adjacent positions are close to the magnetic circuit part, and the push-side springs (12) arranged in adjacent positions are far away from the magnetic circuit part.

3. The high-load flow reed according to claim 1, characterized in that: The spring-loaded side spring (11) is integrally composed of a pin section (111), a bending section (112), and a pushing section (113); The first bending segment (112) is an oblique bending transition structure in which the first pin segment (111) is close to the magnetic circuit part in the relay structure and the first pushing segment (113) is far away from the magnetic circuit part in the relay structure. The first bending segment (112) and the first pin segment (111) form an obtuse angle fit relationship. The first bending segment (112) and the first pushing segment (113) form an obtuse angle fit relationship. Furthermore, in the overlapping relationship between the rebound side spring (11) and the adjacent push side spring (12), the angle position between the first bending segment (112) and the first pin segment (111) is matched with the angle position between the second bending segment (122) and the second pin segment (121) of the push side spring (12).

4. The high-load flow reed according to claim 3, characterized in that: The bend between the first bent section (112) and the first pin section (111) of the spring-loaded side spring (11) is a rounded transition structure; The angle between the first bending section (112) and the first pushing section (113) of the rebound side spring (11) is a rounded transition structure.

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

6. The high-load flow reed according to claim 1, characterized in that: The push-side spring (12) is integrally formed by the pin segment two (121), the bending segment two (122) and the push segment two (123); The second bending segment (122) is an oblique bending transition structure in which the second pin segment (121) is close to the magnetic circuit in the relay structure and the second pushing segment (123) is far away from the magnetic circuit in the relay structure. The second bending segment (122) and the second pin segment (121) form an obtuse angle fit relationship. The second bending segment (122) and the second pushing segment (123) form an obtuse angle fit relationship. Furthermore, the angle between the second bent segment (122) and the second pin segment (121) of the push side spring (12) is greater than the angle between the first bent segment (112) and the first pin segment (111) of the adjacent spring side spring (11).

7. The high-load flow reed according to claim 1, 3 or 6, characterized in that: In the overlapping relationship of the spring-loaded side spring (11) and the push-side spring (12) arranged in adjacent positions, one corner of the elastic gap (13) closes at the bend between the second bent section (122) and the second pin section (121) of the push-side spring (12), and the other corner of the elastic gap (13) closes at the bend between the second bent section (122) and the second push section (123) of the push-side spring (12).

8. The high-load flow reed according to claim 1, characterized in that: The moving reed also has pins (2) that are separately formed from the reed body (1). The pin (2) is connected to the pin connection position of the reed body (1) in a riveted relationship and extends outward from the bottom of the pin segment 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 the side of the reed body (1) facing the magnetic circuit part 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 for mounting and fixing in the base.

9. The high-load flow reed 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 reed according to claim 9, characterized in that: The maximum height of the pin (2) at the end of the elastic gap (13) between the bend segment (122) of the push side spring (12) furthest from the magnetic circuit part and the pin segment (121) is 2mm.

11. The high-load flow reed 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 stacked structures; Push-pull through holes (117) are formed on both sides of the first spring (11') in the width direction. The remaining reeds correspond to the edge region of the push connection position on the first reed (11'), are located inside the corresponding push connection position, and form a gap fit with the corresponding push connection position.

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

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

14. The high-load flow reed according to claim 11, characterized in that: The first spring (11') has an elastic adjustment step (114) at both edges in the width direction, which is located between the pin connection position and the elastic gap (13) and is recessed in a stepped manner. The remaining springs, except for the first spring (11'), are located inside the corresponding elastic adjustment step (114) and form a gap fit with the corresponding elastic adjustment step (114) on the edge region of the first spring (11').

15. The high-load flow reed according to claim 14, characterized in that: The remaining springs, except for the first spring (11'), have a recessed structure and a clearance notch (125) offset from the corresponding elastic adjustment step (114) on the edge region of the first spring (11').

16. The high-load flow reed according to claim 15, characterized in that: The second clearance notch (125) is a flat-bottomed concave structure with two corners (1252) on the top and bottom sides of the concave flat bottom (1251) in the height direction. These 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.

17. The high-load flow reed according to claim 11, 12, 14 or 15, characterized in that: The width of the remaining reeds, except for the first reed (11'), is at least less than the width of the first reed (11') at the corresponding part.

18. The high-load flow reed according to claim 11 or 14, characterized in that: The first reed (11') has an elastic adjustment hole (115) on the top side of the pin connection position in the height direction. And / or, the pushing section of the first reed (11') is provided with an elastic adjustment hole 2 (116) located at the middle of the pushing connection position in the width direction.

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

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

21. A push-rod type relay, comprising a magnetic circuit portion, a contact portion, and a push-lock located between the magnetic circuit portion and the contact portion; Its features are: The moving spring assembly comprising the contact portion has a high-load flow spring as described in any one of claims 1 to 19.

22. The push-rod relay according to claim 21, characterized in that: The push rod relay is a normally open type. The magnetic circuit of the normally open push rod relay mainly consists of a coil frame, iron core, coil (4), yoke (5) and armature (6) assembled on the base (3). The contact part of the normally open push rod relay mainly consists of a moving spring assembly and a normally open stationary spring assembly (8) assembled on the base (3). The moving spring assembly is arranged close to the magnetic circuit, and the normally open stationary spring assembly (8) is arranged far away from the magnetic circuit. The magnetic circuit and contact parts of the normally open push rod relay are arranged on the base (3) in a left-right position and cooperate with the push card (7). The push card (7) is located between the armature (6) and the moving spring assembly. Alternatively, the push rod relay is a conversion type structure. The magnetic circuit of the conversion type push rod relay mainly consists of a coil frame, iron core, coil (4), yoke (5) and armature (6) assembled on the base (3). The contact part of the conversion type push rod relay mainly consists of a normally closed stationary spring assembly (9), a moving spring assembly and a normally open stationary spring assembly (8) assembled on the base (3). The moving spring assembly is positioned between the normally closed stationary spring assembly (9) and the normally open stationary spring assembly (8). The normally closed stationary spring assembly (9) is positioned close to the magnetic circuit, and the normally open stationary spring assembly (8) is positioned far from the magnetic circuit. The magnetic circuit and contact parts of the conversion type push rod relay are arranged in a left-right position on the base (3) and cooperate with a push card (7). The push card (7) is positioned between the armature (6) and the moving spring assembly. Alternatively, the push rod relay is a normally closed type. The magnetic circuit of the normally closed push rod relay mainly consists of a coil frame, iron core, coil, yoke, and armature mounted on the base. The contact part of the normally closed push rod relay mainly consists of a moving spring assembly and a normally closed stationary spring assembly mounted on the base. The moving spring assembly is located away from the magnetic circuit, and the normally closed stationary spring assembly is located close to the magnetic circuit. The magnetic circuit portion and the contact portion of the normally closed push rod relay are arranged in a left-right position on the base and are engaged by a push clip, which is located between the armature and the moving spring assembly.

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