Small-size high-current-carrying push rod type relay

Abstract

The utility model relates to the technical field of relays, and particularly discloses a small-size high-current-carrying push rod type relay, which comprises a magnetic circuit part and a contact part which are arranged on a base and matched with each other through a push card, the contact part is provided with a movable spring assembly and a static spring assembly which are matched with each other at an interval in an actuation / disconnection dynamic state; a static reed of the static spring assembly is provided with a static spring pin section and a contact section, and the contact section is provided with a receding structure which is arranged in an assembling structure on the base and used for pulling the matching distance between the contact section and the movable spring assembly. According to the utility model, the forming of the push rod type relay with small volume and high current-carrying capacity is facilitated, higher current-carrying performance or lower temperature rise performance is obtained with basically the same structural volume, dimension reduction competition is formed in the market competition aspect, and the market competition advantage is strong.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, specifically a small-sized, high-current-carrying push rod relay. 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-button mechanism, and a contact section. The magnetic circuit section mainly comprises a coil frame on the base, an iron core arranged inside the coil frame, a coil wound on the coil frame, a yoke arranged beside the coil, an armature arranged on the yoke in a flip-up structure, 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 arranged 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. This 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 require thickening of the moving spring and stationary spring of the moving spring assembly to achieve high current carrying capacity and low temperature rise. However, to accommodate user-end assembly space and minimize control design and manufacturing costs while enhancing market competitiveness, the overall size of the finished product should not be significantly increased. In other words, the push-rod relay should maintain its current structural size and pin positions on the base, but the thickness of the moving and stationary springs needs to be increased to enlarge the current-carrying area and improve current-carrying performance. However, as precision electrical components, relays have strict design requirements regarding the working gap between the moving and stationary spring assemblies; otherwise, arcing and non-technically required secondary conduction may easily occur, directly affecting the quality of the finished product.

[0004] Based on the specific characteristics of the aforementioned push-rod relays and the technical requirements of the market, while maintaining the current structural volume, it is necessary to increase the size and thickness of the moving and stationary springs to meet the high current-carrying capacity requirements. This inevitably compresses the contact working gap formed between the moving and stationary spring assemblies on the base. To meet the aforementioned technical requirements, ensure the contact working gap between the moving and stationary spring assemblies, and improve the quality of the finished product, a targeted design is needed for the contact relationship of the push-rod relay. No such technology has been disclosed in the applicant's existing technology. Utility Model Content

[0005] The technical objective of this utility model is to: address the special characteristics of the aforementioned push rod relay in adapting to high current operating conditions, and to improve current carrying capacity and obtain high quality without significantly increasing structural volume, by independently developing a small-volume, high-current-carrying push rod relay.

[0006] The technical objective of this utility model is achieved through the following technical solution: a small-volume high-current-carrying push rod relay, comprising a magnetic circuit portion and a contact portion arranged on a base and engaged by a push card;

[0007] The contact portion has a dynamic spring assembly and a stationary spring assembly that are dynamically engaged / disengaged.

[0008] The stationary spring assembly has a stationary spring tip segment and a contact segment;

[0009] The contact segment of the stationary spring has a clearance structure in the assembly structure on the base to reduce the mating distance with the moving spring assembly.

[0010] The aforementioned technical measures address the specific requirements of push-rod relays for high-current operating environments and the need for a small structural volume. By designing a clearance structure in the contact section of the stationary spring, the stationary spring assembly is positioned on the base to create a greater fit between itself and the moving spring assembly at the contact point. This provides a fundamental spatial guarantee for designing the required contact working gap. In other words, through these technical measures, while maintaining the basic design positions of the pins on the base, the high-current-carrying moving spring assembly and stationary spring assembly can be formed on the base according to the designed contact working gap, ensuring that the push-rod relay maintains its current structural volume. Therefore, these technical measures facilitate the creation of small-volume, high-current-carrying push-rod relays, achieving higher current-carrying capacity or lower temperature rise performance with a similar structural volume. This creates a competitive advantage in the market, allowing for a more competitive edge.

[0011] As one of the preferred technical solutions, the clearance structure is the stationary spring sheet bending structure of the stationary spring assembly;

[0012] The stationary reed is integrally composed of a stationary spring lead section, a bent clearance section, and a contact section.

[0013] The stationary spring pin segment is used for mounting and fixing on the base;

[0014] The contact segment is used as a shaped contact connection position, through which stationary contacts are assembled;

[0015] The bending clearance section is an oblique bending transition structure in which the stationary spring pin section is close to the moving spring assembly on the base, and the contact section is far away from the moving spring assembly on the base.

[0016] The above-mentioned technical measures are designed to address the special characteristics of the small-volume, high-current-carrying push rod relay. By using a bent transition structure to offset the contact segment of the stationary spring from the lead segment in the thickness direction, the necessary arrangement space is borrowed from the housing side. This effectively increases the design requirement for the fit between the spring and the moving spring assembly, thereby satisfying the technical requirement of reliably obtaining the design requirement for the fit between the contacts while minimizing changes to the overall structural volume of the push rod relay.

[0017] Furthermore, the bent clearance section and the stationary spring lead section form an obtuse angle fit, and the bent clearance section and the contact section also form an obtuse angle fit. This technical measure, while creating a clearance structure at the stationary contact of the stationary spring, minimizes structural stress concentration at the bend of the stationary spring, reducing the risk of plastic deformation or even breakage of the stationary spring during long-term service, and also ensuring the structural strength of the stationary spring in the engaged state to meet the moving spring assembly.

[0018] Furthermore, the misalignment distance between the contact segment and the stationary spring pin segment under the bending transition of the bending relief segment is at most twice the thickness of the main body of the contact segment. This technical measure, while enabling the stationary contact of the stationary spring to form a relief structure, reliably ensures the structural strength of the stationary spring in the attracted state to meet the moving spring assembly, and also effectively avoids positional interference between the stationary spring and the housing mounted on the base.

[0019] As one of the preferred technical solutions, the clearance structure is a structure that reduces the thickness of the stationary spring contact segment of the stationary spring assembly.

[0020] Furthermore, a contact connection position is formed on the contact segment of the stationary spring, and the thickness of the contact connection position is thinner than that of the main body of the contact segment.

[0021] The above-mentioned technical measures are designed to address the special characteristics of the small-volume, high-current-carrying push rod relay. By relatively thinning the contact connection position on the stationary spring contact section, the required fit clearance between the stationary spring and the moving spring assembly is increased. This satisfies the technical requirement of reliably obtaining the required fit clearance between the contacts while minimizing changes to the overall structural volume of the push rod relay. This is particularly evident in the structure with the aforementioned bent transition of the stationary spring. The double clearance structure at different positions further ensures a more reliable contact working clearance that meets the design requirements.

[0022] Furthermore, the thickness of the contact connection is at least half the thickness of the main body of the contact segment. This technical measure achieves a clearance structure at the contact segment while essentially not affecting the high current-carrying capacity and structural strength of the stationary spring.

[0023] As one of the preferred technical solutions, the moving spring assembly has a spring body and a moving spring pin that are combined and connected together;

[0024] The movable spring pins are arranged on the side of the reed body on the base facing the magnetic circuit portion. One end of the movable spring pin extends outward from the bottom of the reed body in the height direction, and the other end of the movable spring pin extends to the elastic deformation of the reed body under the action of thrust.

[0025] The above-mentioned technical measures are designed to address the special characteristics of the small-volume, high-current-carrying push rod relay. They enable the moving spring pin mounted on the base to provide a good stopping and limiting effect on the moving spring when it is released. In other words, the moving spring pin stops and constrains the rebound force of the moving spring when it is released, reducing the phenomenon of arcing and secondary conduction caused by the rebound force.

[0026] The stop and limit effect achieved by the moving spring pin is different from the stop and limit structure attached to the housing in the prior art. The moving spring pin achieves the dual function of "one thing serving two purposes" without the need to form a complicated and costly additional stop and limit structure. This makes the structure of the entire push rod relay relatively simple and low-cost.

[0027] Furthermore, the spring body of the moving spring assembly has a double-layered structure, having a magnetic circuit side spring and a stationary spring stacked together in the thickness direction. There is an elastic gap between the magnetic circuit side spring and the stationary spring, which is located between the moving spring pin section and the pushing section and is formed by a stacked and layered structure.

[0028] The maximum height of the angle between the end of the moving spring pin at the elastic deformation point and the lowest point of the elastic gap in the height direction is 2mm.

[0029] The above-mentioned technical measures are designed to address the special characteristics of the push rod relay in adapting to high current operating conditions. The moving spring is composed of a double-layered stacked structure to form a large current-carrying area, which minimizes the impact of the large current-carrying area on the electromagnetic attraction design of the magnetic circuit. It also has excellent bending and deformation performance under thrust.

[0030] The specific fit between the spring body based on the double-layered structure and the moving spring pin ensures that the moving spring pin mounted on the base provides a good stopping and limiting effect on the spring force release of the double-layered structure spring body, effectively reducing the ignition arcing and secondary conduction phenomena caused by the rebound force.

[0031] Furthermore, the elastic gap of the moving spring assembly has a triangular structure. The stationary spring side plate forms one base of the elastic gap, and the magnetic circuit side plate forms two waists of the elastic gap with an included angle of 110° to 150°. The length of the base is greater than the length of the two waists. This technical measure creates an approximately triangular elastic gap in the double-layered spring body, forming a certain slanted arrangement in the vertical direction. This allows the magnetic circuit side plate and the stationary spring side plate to form a stable overlap, and also makes the rigidity of the magnetic circuit side plate at the elastic gap higher than that of the stationary spring side plate, thus reliably constraining the rebound force of the entire spring body when the elastic force is released.

[0032] Furthermore, an elastic adjustment hole is provided on the pin segment of the magnetic circuit side spring, located on the top side of the pin connection position in the height direction and blocked by the pin of the moving spring. This technical measure can reduce the elastic force of the magnetic circuit side spring, thereby constraining the rebound force of the moving spring when the elastic force is released, effectively reducing the risk of arcing and secondary conduction.

[0033] The beneficial technical effects of this utility model are as follows: The above-mentioned technical measures are aimed at the special characteristics of the push rod relay in adapting to the high current operating environment and the technical requirements for small structural volume. By designing a staggered and / or thinned clearance structure for the contact section of the stationary spring (especially the design of staggered structure combined with thinning structure), the stationary spring assembly on the base is made to increase the mating distance between it and the moving spring assembly at the contact mating point. This provides a basic space guarantee for the design of the contact working gap that meets the technical requirements. In this way, under the premise that the designed pin positions on the base basically maintain the current design position, the high current-carrying moving spring assembly and the stationary spring assembly can be formed on the base according to the design requirements of the contact working gap, so as to ensure that the push rod relay basically maintains the current design structural volume. In addition, by designing the pins of the moving spring assembly to stop the moving spring with a specific matching relationship, and by designing the elastic gap and elastic adjustment hole of the double-layer stacked moving spring, the rebound force of the moving spring when the spring force is released can be effectively constrained, so as to reliably reduce the phenomenon of arcing and secondary conduction caused by the rebound force, and provide reliable quality assurance for small-volume, high-current push rod relays.

[0034] Therefore, the above-mentioned technical measures are conducive to the molding of small-volume, high-current-carrying push rod relays, which can achieve higher current-carrying performance or lower temperature rise performance with basically the same structural volume, thus forming a dimension-reducing competition in the market and having a strong competitive advantage. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of one structure of the present utility model.

[0036] Figure 2 for Figure 1 A schematic diagram of the static reed in the image.

[0037] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0038] Figure 4 for Figure 1 A schematic diagram of the moving spring in the diagram.

[0039] The symbols in the diagram have the following meanings: 1—Base; 2—Iron core; 3—Coil; 4—Yoke; 5—Armature; 6—Compression spring; 7—Pushing clip; 8—Moving spring assembly; 81—Magnetic circuit side spring; 82—Stationary spring side spring; 83—Elastic gap; 84—Moving spring pin section; 85—Pushing section; 86—Moving contact; 87—Moving spring pin; 9—Stationary spring assembly; 91—Stationary spring pin section; 92—Bending clearance section; 93—Contact section; 94—Contact connection position; 95—Stationary contact. Detailed Implementation

[0040] This utility model relates to the field of relay technology, specifically a small-sized, high-current-carrying push-rod relay. The main technical solution of this utility model will be described in detail below with reference to several embodiments. Embodiment 1, in conjunction with the accompanying drawings, is... Figure 1 , Figure 2 , Figure 3 and Figure 4 The technical solution of this utility model is clearly and thoroughly explained; although other embodiments are not shown in separate drawings, their main structures can still be referred to the drawings of Embodiment 1.

[0041] 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.

[0042] Example 1

[0043] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the push-rod relay of this utility model includes a base 1 and an iron core 2, a coil 3, a yoke 4, an armature 5, a push-lock 7, a compression spring 6, a moving spring assembly 8, and a stationary spring assembly 9, all mounted on the base 1. The magnetic circuit includes the iron core 2, the coil 3, the yoke 4, and the armature 5. The magnetic circuit and the contact portion composed of the moving spring assembly 8 and the stationary spring assembly 9 are arranged in a left-right configuration on the base 1. The push-lock 7 is located between the armature 5 and the moving spring assembly 8. The armature 5, which flips on the yoke 4, pushes the push-lock 7 to make the contact portion conductive, or the disconnected contact portion pushes the push-lock 7 to make the armature 5 flip on the yoke 4. Therefore, the moving spring assembly 8 and the stationary spring assembly 9 of the contact portion are engaged / disengaged in a dynamic state.

[0044] The moving spring assembly 8 consists of a spring body, a moving spring pin 87, and a moving contact 86, which are assembled from separate parts.

[0045] The stationary spring assembly 9 consists of a stationary spring sheet and a stationary contact 95 that are assembled from separate parts.

[0046] To be suitable for high-current operating environments, the spring body of the moving spring assembly 8, the moving spring pin 87, and the stationary spring of the stationary spring assembly 9 are relatively thicker than ordinary moving and stationary springs 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.

[0047] To meet the requirements for a small-volume structure, the design parameters of each foot position on the base 1, especially the foot positions of the moving spring assembly 8 and the stationary spring assembly 9, are basically maintained for the corresponding specifications.

[0048] like Figure 1 , Figure 2 and Figure 3As shown, the stationary spring assembly 9 has a bent spring sheet, which has an integrally formed stationary spring lead section 91, a bent relief section 92, and a contact section 93 in the height direction. That is, the stationary spring sheet is integrally formed by the stationary spring lead section 91, the bent relief section 92, and the contact section 93. The stationary spring lead section 91 is used for mounting and fixing at the corresponding foot hole on the base 1. The contact section 93 is used to form a contact connection position 94 at the top, through which the stationary contact 95 is mounted. The bent relief section 92 is an obliquely bent transition structure where the stationary spring lead section 91 is close to the moving spring assembly 8 on the base 1, and the contact section 93 is away from the moving spring assembly 8 on the base 1. This obliquely bent transition structure constitutes one of the relief structures that widens the contact mating distance between the stationary spring assembly 9 and the moving spring assembly 8 on the base 1. In other words, given the inconvenient design of the foot positions on the base 1, the moving spring of the moving spring assembly 8 and the stationary spring of the stationary spring assembly 9 need to be thickened to increase the current-carrying area. Therefore, the contact segments of the stationary spring are bent and misaligned to allow for the necessary distance for contact clearance matching with the moving spring assembly 8.

[0049] To ensure the structural strength of the formed stationary spring, the bent relief section 92 on the stationary spring and the stationary spring lead section 91 form an obtuse angle fit. Similarly, the bent relief section 92 and the contact section 93 form an obtuse angle fit. The misalignment distance between the contact section 93 and the stationary spring lead section 91 under the bending transition of the bent relief section 92 is approximately 2 / 3 times the thickness of the main body of the contact section 93. This also reduces positional interference between the stationary spring with the relief structure and the housing assembled on the base 1.

[0050] Of course, relying solely on the aforementioned bending and clearance structure of the stationary spring is relatively ineffective in achieving the technical objective; therefore, other complementary clearance structures are needed. This complementary clearance structure involves the contact segment 93 of the stationary spring serving as the connection point to the stationary contact 95. Specifically, the top of the contact segment 93 has a contact connection position 94, which is thinned so that its thickness is less than that of the main body of the contact segment 93. However, this thinning clearance structure of the contact segment 93 requires it to be concave and flattened from the side closer to the moving spring assembly 8, rather than from the side farther away from the moving spring assembly; otherwise, the clearance would be lost.

[0051] To achieve the design objective of making way for the contact connection portion 94, and to meet the requirements of high current carrying capacity and structural strength, the thickness of the contact connection portion 94 should not be too thin, and should be approximately 1 / 2 times the thickness of the main body of the contact segment 93.

[0052] Thus, through the aforementioned bending transition structure design of the stationary spring and the thinning design of the contact connection position 94, the contact segment of the stationary spring forms a clearance structure in the assembly structure on the base 1 to separate the mating distance between it and the moving spring assembly 8, ensuring the technical requirements of the contact working clearance under the design of thickened spring and basically unchanged foot position.

[0053] Based on the design of the static spring assembly 9, in order to reduce the rebound force of the dynamic spring assembly 8 when the spring force is released and to avoid arcing and secondary conduction that is not technically required, the dynamic spring assembly 8 needs to form the following stop and limit structure.

[0054] See Figure 1 and Figure 4 The moving spring assembly 8 shown uses a moving spring sheet, which has a spring sheet body and a moving spring pin 87 that are assembled and connected together after being separately formed.

[0055] The reed body is a composite structure of a magnetic circuit side reed 81 (on the side adjacent to the magnetic circuit portion in the relay structure) and a stationary spring side reed 82 (on the side adjacent to the stationary spring assembly in the relay structure) in the thickness direction. To enable low-cost, easy, and high-quality molding of this composite structure, the magnetic circuit side reed 81 and the stationary spring side reed 82 of the reed body 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.

[0056] In the aforementioned composite structure, the magnetic circuit side spring 81 is integrally formed by a pin segment, a bent segment, and a pushing segment. Specifically, the pin segment serves as a combined connection to the moving spring pin 87. The bent segment causes the pin segment and the pushing segment to bend and misalign in the thickness direction of the spring body, so as to form the elastic gap 83 described below, and to generate corresponding bending deformation in conjunction with the release of thrust or spring force during service. The pushing segment serves as a connection position for arranging the push card—that is, the push card through hole—and as a connection position for arranging the moving contact, and it is also the main part that generates corresponding bending deformation in conjunction with the release of thrust or spring force during service.

[0057] Under the bending effect of the aforementioned bending section one, the lead section one of the magnetic circuit side spring 81 is closer to the magnetic circuit part in the relay structure, while the push section one is farther away from the magnetic circuit part (closer to the stationary spring assembly) in the relay structure. To accommodate the thrust deformation and reduce the electromagnetic attraction force design requirements of the thrust generated on the magnetic circuit part, the bending section one is a slanted bending transition structure where the lead section one is closer to the magnetic circuit part in the relay structure, and the push section one is farther away from the magnetic circuit part in the relay structure. That is, the bending section one and the lead section one form an obtuse angle fit, and the bending section one and the push section one also form an obtuse angle fit. To avoid stress concentration at the bending point of the magnetic circuit side spring 81, the angle between the bending section one and the lead section one is required to be a rounded transition structure, and the angle between the bending section one and the push section one is also a rounded transition structure. As a key part that generates bending deformation and constrains the elastic release reaction force in conjunction with the stationary spring side spring plate 82, the included 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.).

[0058] In the aforementioned composite structure, the stationary spring side spring sheet 82 is integrally formed by a pin segment two, a bent segment two, and a pushing segment two. Pin segment two is used to connect the moving spring pin 87 in conjunction with pin segment one. The bent segment two causes pin segment two and pushing segment two to bend and misalign in the thickness direction of the spring sheet body, facilitating the formation of the elastic gap 83 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 it is also the main part that undergoes corresponding bending deformation during service in response to thrust or spring release.

[0059] Under the bending effect of the aforementioned second bending segment, the pin segment 2 of the stationary spring side spring plate 82 is closer to the magnetic circuit part in the relay structure, while the push segment 2 is farther away from the magnetic circuit part (closer to the stationary spring assembly) in the relay structure. To accommodate the thrust deformation and reduce the electromagnetic attraction design requirements of the thrust generated on the magnetic circuit part, the second bending segment is a slanted bending transition structure where the pin segment 2 is closer to the magnetic circuit part in the relay structure and the push segment 2 is farther away from the magnetic circuit part in the relay structure. That is, the second bending segment and the pin segment 2 form an obtuse angle fit, and the second bending segment and the push segment 2 also form an obtuse angle fit. To avoid stress concentration at the bending point of the stationary spring side spring plate 82, the angle between the second bending segment and the pin segment 2 is required to be a rounded transition structure, and the angle between the second bending segment and the push segment 2 is also a rounded transition structure.

[0060] In the overlapping relationship between the magnetic circuit side spring 81 and the stationary spring side spring 82 of the above-described structure, the angle between the first bent segment and the first pin segment of the magnetic circuit side spring 81 is higher than the angle between the second bent segment and the second pin segment of the stationary spring side spring 82. These two angles form a spacing fit in the height direction. Moreover, the included angle between the second bent segment and the second pin segment of the stationary spring side spring 82 is greater than the included angle between the first bent segment and the first pin segment of the magnetic circuit side spring 81. In the overlapping relationship between the magnetic circuit side spring 81 and the stationary spring side spring 82 of the above-described structure, the angle between the second bent segment and the second pushing segment of the stationary spring side spring 82 basically coincides with the angle between the first bent segment and the first pushing segment of the magnetic circuit side spring 81. Thus, between the magnetic circuit side spring 81 and the stationary spring side spring 82 of the stacked spring body, an elastic gap 83 is formed, obliquely arranged and basically triangular in structure, located between the pin connection position and the push connection position. One corner of the elastic gap 83 closes due to the overlapping relationship at the bend between the second bent section and the second pin section of the aforementioned stationary spring side spring 82. The other corner of the elastic gap 83 also closes due to the overlapping relationship at the bend between the second bent section and the second push section of the aforementioned stationary spring side spring 82. Based on this approximately triangular elastic gap 83, the second bent section of the stationary spring side spring 82 forms one base of the obliquely arranged elastic gap 83, and the first bent section of the magnetic circuit side spring 81 and the part of the first pin section near the first bent section form two waists of the elastic gap 83. 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.

[0061] The spring body of the aforementioned moving spring assembly 8 has a riveting hole—that is, a pin connection position—at its pin segment for assembling and connecting the moving spring pin 87. This riveting hole penetrates the magnetic circuit side spring 81 and the stationary spring side spring 82 in the thickness direction. The moving spring pin 87 constituting the moving spring is riveted to the pin connection position of the spring body, located on the side of the spring body facing the magnetic circuit portion in the relay structure. The bottom end of the moving spring pin 87 extends outward from the bottom of the pin segment of the spring body in the height direction, and the top end of the moving spring pin 87 extends to the elastic gap 83 of the spring body, located between the heights of the two corners constituting the elastic gap 83 (that is, the area between the angle between the first bend of the magnetic circuit side spring 81 and the first bend of the pin segment, and the angle between the second bend of the stationary spring side spring 82 and the second bend of the pin segment). Thus, the upper part of the moving spring pin 87 acts as a backrest and stop for the pin section of the spring body, significantly reducing the spring release reaction force due to the stop at the elastic gap 83. This prevents arcing and secondary conduction with the stationary spring assembly 9 caused by excessive spring release reaction force. Of course, to improve the stop rigidity, current carrying capacity, and socket stability on the base of the moving spring pin 87, the thickness of the moving spring pin 87 should be greater than the thickness of the spring body. It can be formed from a high-hardness conductive material, so that the high-hardness moving spring pin 87 can stably limit the spring body when assembled on the base 1.

[0062] Based on the above-mentioned reed body and its cooperation with the moving spring pin 87, in order to further reduce the elastic force of the magnetic circuit side reed 81 and constrain the rebound reaction force of the moving spring when the elastic force is released, an elastic adjustment hole is provided in the pin section of the magnetic circuit side reed 81. The hole is located at the top side of the pin connection position in the height direction and is basically located in the center area of ​​the width. The elastic adjustment hole is blocked by the moving spring pin 87.

[0063] With the above design structure, under the premise that the structural volume of the push rod relay remains basically unchanged and the current-carrying area of ​​the moving spring assembly 8 and the stationary spring assembly 9 needs to be increased, it can effectively ensure that the working gap between the moving spring assembly 8 and the stationary spring assembly 9 is formed according to the design requirements, so as to ensure that the moving contact 86 and the stationary contact 95 respectively obtain the contact cap height that meets the design requirements (i.e., the approximately spherical crown-shaped protrusion of the contact used as the contact and absorbing part).

[0064] Example 2

[0065] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0066] In the moving spring assembly, the moving spring pin is connected to the pin section of the reed body, and its top extends to the lower side of the elastic gap of the reed body, with a height of about 2mm between it and the lowest point of the elastic gap.

[0067] Example 3

[0068] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0069] In the moving spring assembly, the moving spring pin is connected to the pin section of the reed body, and its top extends to the lower side of the elastic gap of the reed body, with a height of about 1mm between it and the lowest point of the elastic gap.

[0070] Example 4

[0071] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0072] In the stationary spring assembly, the misalignment distance between the contact segment and the stationary spring pin segment under the bending transition of the bending relief segment is approximately twice the thickness of the main body of the contact segment;

[0073] Given sufficient clearance, the thinning structure design of the contact connection position on the contact segment can be eliminated, so that the contact segment is basically formed with a uniform thickness.

[0074] Example 5

[0075] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0076] In the stationary spring assembly, the misalignment distance between the contact segment and the stationary spring pin segment under the bending transition of the bending relief segment is approximately 1 / 2 times the thickness of the main body of the contact segment.

[0077] The thickness of the contact connection is approximately half the thickness of the main body of the contact segment.

[0078] Example 6

[0079] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0080] In the moving spring assembly, the part of the magnetic circuit side spring that forms the elastic gap is formed in a C-shaped semi-circular structure; the stationary spring side spring is formed in a straight sheet structure, forming an elastic gap structure with a semi-circular layered structure.

[0081] 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.

[0082] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications can still be made to the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the present invention.

Claims

1. A small volume high current push rod type relay, comprising a magnetic circuit portion and a contact portion arranged on a base (1) and cooperating through a push rod (7); the contact portion having a dynamic spring assembly (8) and a static spring assembly (9) cooperating in an on / off dynamic state interval; the static spring blade of the static spring assembly (9) having a static spring pin segment (91) and a contact segment (93); characterized in that: the contact segment (93) of the static spring blade has a clearance structure for pulling apart the cooperating interval between the dynamic spring assembly (8) in the assembly structure on the base (1).

2. The small volume high current push rod type relay according to claim 1, characterized in that: the clearance structure is a bending structure of the static spring blade of the static spring assembly (9); the static spring blade is integrally formed by a static spring pin segment (91), a bending clearance segment (92) and a contact segment (93); the static spring pin segment (91) is used for assembly and fixation on the base (1); the contact segment (93) is used for forming a contact connection site (94), and the static contact (95) is assembled through the contact connection site (94); the bending clearance segment (92) is a diagonal bending transition structure for the static spring pin segment (91) to be close to the dynamic spring assembly (8) on the base (1) and for the contact segment (93) to be away from the dynamic spring assembly (8) on the base (1).

3. The small volume high current push rod type relay according to claim 2, characterized in that: an obtuse angle cooperation relationship is formed between the bending clearance segment (92) and the static spring pin segment (91), and an obtuse angle cooperation relationship is formed between the bending clearance segment (92) and the contact segment (93).

4. The small volume high current push rod type relay according to claim 2 or 3, characterized in that: the dislocation distance between the contact segment (93) and the static spring pin segment (91) under the bending transition of the bending clearance segment (92) is at most one thickness of the main part of the contact segment (93).

5. The small volume high current push rod type relay according to claim 1 or 2, characterized in that: the clearance structure is a thickness reduction structure of the contact segment (93) of the static spring blade of the static spring assembly (9).

6. The small volume high current push rod type relay according to claim 5, characterized in that: the contact connection site (94) is formed on the contact segment (93) of the static spring blade; the thickness of the contact connection site (94) is thinner than the main part of the contact segment (93).

7. The small volume high current push rod type relay according to claim 6, characterized in that: the thickness of the contact connection site (94) is at least 1 / 2 of the thickness of the main part of the contact segment (93).

8. The small volume high current push rod type relay according to claim 1, characterized in that: the dynamic spring assembly (8) has a spring blade body and a dynamic spring pin (87) combined and connected together. The moving spring pin (87) is arranged on the side of the reed body facing the magnetic circuit part on the base (1), one end of the moving spring pin (87) extends outward from the bottom of the reed body in the height direction, and the other end of the moving spring pin (87) extends to the elastic deformation of the reed body under the thrust.

9. The small-volume high-current push rod type relay according to claim 8, characterized in that: The reed body of the moving spring assembly (8) is a double-layered structure, having a magnetic circuit side reed (81) and a static spring side reed (82) stacked together in the thickness direction, and having an elastic gap (83) formed in a stacked layered structure between the magnetic circuit side reed (81) and the static spring side reed (82) between the moving spring pin segment (84) and the pushing segment (85). The end of the moving spring pin (87) at the elastic deformation is at a maximum height of 2mm from the height of the angle of the elastic gap (83) at the lowest position in the height direction.

10. The small-volume high-current push rod type relay according to claim 9, characterized in that: The elastic gap (83) of the moving spring assembly (8) is in a triangular structure, the static spring side reed (82) constitutes one bottom side of the elastic gap (83), the magnetic circuit side reed (81) constitutes two sides of the elastic gap (83) with an angle of 110-150°, and the length of the bottom side is greater than the length of the two sides.

11. The small-volume high-current push rod type relay according to claim 9 or 10, characterized in that: On the pin segment of the magnetic circuit side reed (81), an elastic adjusting hole is provided at the top side of the pin connection position in the height direction and is shielded by the moving spring pin (87).

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