Zero resistance moving vane, relay and electric power meter

Abstract

This utility model relates to a zero-resistance moving spring, comprising a main connection end and a moving spring assembly fixed to the main connection end at one end. The moving spring assembly includes several moving springs stacked vertically. Each moving spring includes a fixing part for fixing to the main connection end and an elastic main body extending from the fixing part to the other end. The moving spring assembly has a contact part at the end away from the fixing part for selectively making electrical contact with or disengaging from a second main connection end. The fixing parts of the stacked moving springs each have a head end, which are offset from front to back. There is a gap between the upper and lower fixing parts. The zero-resistance moving spring has solidified solder extending from the head end of the fixing part into the gap. In this way, after the coated solder melts, it flows into the gap and solidifies, making the contact resistance between the main connection end and the fixing part of the moving spring close to zero resistance after welding. The resistance is stable, ensuring reduced relay heating and facilitating automated production.

Description

Technical Field

[0001] This utility model relates to a zero-resistance moving spring, relay and power meter for use in power instruments, and particularly to a zero-resistance moving spring, relay and power meter suitable for the field of power transmission. Background Technology

[0002] In the field of electronic circuits and automation control, relays are core components for realizing circuit switching control, signal conversion, and electrical isolation. Their performance directly affects the reliability and stability of the system. Currently, existing relay products commonly use a riveting connection between the moving spring and the metal connector. This process applies pressure to the connector, causing plastic deformation of the material, thereby achieving a mechanical and electrical connection between the moving spring and the metal connector.

[0003] However, this traditional riveting connection method has significant drawbacks. On one hand, during the riveting process, the contact interface between the connector and the moving spring can develop microscopic gaps and unevenness due to material deformation, leading to a significant increase in contact resistance. On the other hand, stress concentration at the riveting location can cause poor local contact, further exacerbating the resistance increase problem. Actual measurement data shows that the contact resistance at the connection between the moving spring and the metal connector in relays using riveting is typically 20%-50% higher than the ideal connection condition. Under prolonged high-current operation, excessive resistance can trigger a significant Joule heating effect, causing a sharp rise in the relay's internal temperature. Statistics show that after two hours of continuous operation, the temperature of key components in relays using simple riveting can reach 70℃-85℃, far exceeding the normal operating temperature range (40℃-60℃), seriously threatening the relay's service life and operational reliability.

[0004] In addition, high temperatures can accelerate the aging of the internal insulation materials of relays, increasing the risk of short circuits. At the same time, the accumulation of thermal stress can cause fatigue deformation of the moving spring, affecting the closing accuracy and contact stability of the contacts, which in turn can lead to faults such as poor contact and malfunctions, greatly limiting the application and promotion of relays in fields with high reliability requirements such as new energy vehicles and smart grids.

[0005] Therefore, in the power sector, especially under the stringent requirements related to the electrical safety of the general public, there is an urgent need to develop a new connection structure and process to effectively reduce contact resistance and improve the electrical performance and operational stability of relays. Utility Model Content

[0006] The purpose of this invention is to provide a zero-resistance moving spring that can effectively reduce contact resistance.

[0007] To achieve the above technical objectives, this utility model adopts the following technical approach:

[0008] A zero-resistance moving spring includes a main connection end and a moving spring assembly fixed to the main connection end at one end. The moving spring assembly includes several moving springs stacked vertically. Each moving spring includes a fixing part for fixing to the main connection end and an elastic main body part extending from the fixing part to the other end. The moving spring assembly has a contact part at the end away from the fixing part for selectively making electrical contact with or disengaging from a second main connection end. The fixing parts of the stacked moving springs each have a head end, which are offset from front to back. There is a gap between the upper and lower fixing parts. The zero-resistance moving spring has solidified solder extending from the head end of the fixing part into the gap between the pieces.

[0009] As a further improvement of this utility model, the main connecting end and the fixed part are respectively provided with riveting protrusions and riveting holes that are riveted to each other, and the riveting protrusions are integrally stretched from the main connecting end.

[0010] As a further improvement of this utility model, the movable spring group includes a first movable spring, a second movable spring, and a third movable spring stacked on top of each other. The head ends of the fixing parts of the first movable spring, the second movable spring, and the third movable spring are arranged in a stepped manner, and the solidified solder extends from the head ends into the gap between their respective plates.

[0011] As a further improvement of this utility model, the main body includes a curved portion that protrudes upward in an arc shape.

[0012] As a further improvement of this utility model, the curved portions of the first movable spring, the second movable spring, and the third movable spring are distributed in a semi-racetrack-like interval.

[0013] As a further improvement of this utility model, the curved portion extends further away from the fixed portion to form an extension portion, and the extension portion is provided with a mounting hole for mounting the contact portion.

[0014] As a further improvement of this utility model, the extension portion extends further into a linkage portion for connection with the power component.

[0015] As a further improvement of this utility model, the main connection end includes a mounting portion for holding the fixing portion, an inclined portion extending from the mounting portion in a direction away from the moving spring group, and a connection portion extending further from the inclined portion for connecting with the terminal button.

[0016] To achieve the above-mentioned technical objectives, the present invention may also employ the following technical methods:

[0017] A relay includes a relay housing, a aforementioned zero-resistance moving spring located within the relay housing, and a power component for linkage with the zero-resistance moving spring.

[0018] To achieve the above-mentioned technical objectives, the present invention may also employ the following technical methods:

[0019] An electrical meter includes an electrical meter housing and the aforementioned zero-resistance moving spring located within the electrical meter housing.

[0020] Compared to existing technologies, the fixed ends of the stacked moving springs in this invention are staggered, facilitating mechanized solder coating. Each of the upper and lower fixed ends has an inter-piece gap. When the solder coated at the staggered locations is melted by high-frequency or laser local heating, the molten solder flows along the inter-piece gaps between adjacent fixed ends. After cooling and solidification, the zero-resistance moving spring has solidified solder extending from the fixed end into the inter-piece gap. This design ensures that the melted solder flows into the gaps and solidifies, resulting in near-zero resistance between the main connection end and the fixed end of the moving spring after welding. This stable resistance reduces relay heating, facilitates automated production, and is cost-effective. Attached Figure Description

[0021] Figure 1 This is an exploded view of the zero-resistance moving spring of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the zero-resistance moving spring of this utility model when it is not coated with solder;

[0023] Figure 3 This is a schematic diagram of the structure of the zero-resistance moving spring of this utility model when coated with solder;

[0024] Figure 4 yes Figure 3 A structural diagram from another angle;

[0025] Figure 5 This is a schematic diagram of the structure of the zero-resistance moving spring sheet after the solder extends into the gap between the sheets and solidifies.

[0026] Figure 6 yes Figure 5 A structural diagram from another angle;

[0027] Figure 7 yes Figure 2 Enlarged schematic diagram of some of the structures in the diagram;

[0028] Figure 8 yes Figure 6 Enlarged schematic diagram of some of the structures in the diagram;

[0029] Figure 9 This is a schematic diagram of the structure of the zero-resistance moving spring relay of this utility model.

[0030] Figure label:

[0031] Zero-resistance moving spring 100 Main connection terminal 1

[0032] Mounting part 11, riveting protrusion 111

[0033] Inclined part 12 Connecting part 13

[0034] Moving reed assembly 2 Contact part 201

[0035] Linkage section 202 Inter-piece gap 203

[0036] Solidified solder 204, first moving spring 21

[0037] First fixing part 211 Head end 2111

[0038] Riveting hole 2112 First main body 212

[0039] First curved portion 2121 First extension portion 2122

[0040] First mounting hole 2123 Second moving spring 22

[0041] Second fixing part 221 Head end 2211

[0042] Riveting hole 2212 Second main body 222

[0043] Second curved section 2221 Second extension section 2222

[0044] Second mounting hole 2223 Third moving spring 23

[0045] Third fixing part 231 Head end 2311

[0046] Riveting hole 2312 Third main body 232

[0047] Third bend 2321 Third extension 2322

[0048] Third mounting hole 2323 Second main connection end 3

[0049] The second contact portion 32 is coated with solder 20'

[0050] Relay 200 Detailed Implementation

[0051] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0052] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0053] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0054] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0055] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0056] Please refer to Figures 1 to 9 The diagram shown is a structural schematic of the zero-resistance moving spring 100 of this utility model. A zero-resistance moving spring 100 includes a metal sheet-shaped main connecting end 1 and a metal moving spring assembly 2 fixed at one end to the main connecting end 1. The moving spring assembly 2 includes a plurality of moving springs 21, 22, and 23 stacked vertically. In this embodiment, it includes a first moving spring 21 at the top, a second moving spring 22 in the middle, and a third moving spring 23 at the bottom. The moving springs 21, 22, and 23 include fixing portions 211, 221, and 231 for fixing to the main connecting end 1, and elastic main body portions 212, 222, and 232 extending from the fixing portions 211, 221, and 231 to the other end. In this embodiment, the first moving spring 21 includes a first fixing portion. 211. The first main body 212, the second movable spring 22 includes a second fixing part 221 and a second main body 222, the third movable spring 23 includes a third fixing part 231 and a third main body 232, the movable spring group 2 has a contact part 201 at one end away from the fixing parts 211, 221, 231 for selectively making electrical contact with or disengaging from the second main connection terminal 3. In this embodiment, the contact part 201 is a silver contact to reduce contact resistance. The fixing parts 211, 221, 231 of the vertically stacked movable springs 21, 22, 23 are respectively provided with head ends 2111, 2211, 2311, and 2111, respectively. The head ends 2111, 2211, 2311 are staggered. See [reference needed] Figures 1 to 8As shown, in this embodiment, the first movable spring 21 has its head end 2111 located at the leftmost end, the second movable spring 22 has its head end 2211 located in the middle, and the third movable spring 23 has its head end 2311 located at the rightmost end. This allows the three head ends 2111, 2211, and 2311 to be arranged in a staggered manner. This arrangement facilitates the mechanized application of solder 204' to the staggered parts. The fixing parts 211, 221, and 231 are all provided with inter-piece gaps 203, meaning that when the three fixing parts 211, 221, and 231 are in contact with the main... When the connecting end 1 is riveted or fixed in other ways, there is still a certain gap in the vertical direction. When the solder 204' coated on the misaligned part is heated and melted by high frequency or laser local heating, the melted solder will flow into the gap between each adjacent fixing part 211, 221, 231 along the gap between the pieces 203. After cooling and solidification, the zero resistance moving spring 100 is provided with solidified solder 204 extending from the head end 2111, 2211, 2311 of the fixing part 211, 221, 231 into the gap between the pieces 203. With this configuration, solder 204' is applied to the misaligned ends 2111, 2211, and 2311 of the moving springs 21, 22, and 23. After being melted by local heating with high frequency or laser, the solder 204' will flow into the gaps left after the moving springs 21, 22, and 23 are riveted or fixed to the main connection end 1. After welding, the contact resistance between the main connection end 1 and the fixing parts 211, 221, and 231 of the moving springs 21, 22, and 23 is close to zero, the resistance is stable, the heating of the relay 200 is reduced, and it is conducive to automated production and has the characteristics of low cost.

[0057] Specifically, the main connecting end 1 and the fixing parts 211, 221, and 231 are respectively provided with riveting protrusions 111 and riveting holes 2112, 2212, and 2312 that are riveted together. The riveting protrusions 111 are integrally stretched from the main connecting end 1. With this configuration, the main connecting end 1 and the fixing parts 211, 221, and 231 are riveted together, and the integrally stretched riveting protrusions 111 are more conducive to reducing the contact resistance between the main connecting end 1 and the moving spring fixing parts 211, 221, and 231.

[0058] In this embodiment, the movable spring group 2 includes a first movable spring 21, a second movable spring 22, and a third movable spring 23 stacked vertically. The head ends 2111, 2211, and 2311 of the fixing portions 211, 221, and 2311 of the first movable spring 21, the second movable spring 22, and the third movable spring 23 are stepped. The solidified solder 204 extends from the head ends 2111, 2211, and 2311 into the gap 203 between the respective springs. This stepped arrangement of the head ends 2111, 2211, and 2311 allows the coated solder 204' to evenly penetrate into the gaps 203 between the individual pieces after melting. By ensuring that the amount of solder penetration is approximately the same, the structural uniformity of the fixing portions 211, 221, and 231 of the first moving spring 21, the second moving spring 22, and the third moving spring 23 is improved, further reducing the contact resistance between the main connecting end 1 and the fixing portions 211, 221, and 231 of the moving springs 21, 22, and 23.

[0059] The main body portions 212, 222, and 232 include upwardly curved portions 2121, 2221, and 2321 that protrude in an arc shape. Specifically, the first main body portion 212, the second main body portion 222, and the third main body portion 232 each include an upwardly curved first portion 2121, a second curved portion 2221, and a third curved portion 2321. This configuration allows the movable springs 21, 22, and 23 to each have good elasticity, resulting in better overall elasticity for the movable spring assembly 2.

[0060] The bent portions 2121, 2221, and 2321 of the first movable spring 21, the second movable spring 22, and the third movable spring 23 are spaced apart in a semi-racetrack shape. This arrangement ensures that the first movable spring 21, the second movable spring 22, and the third movable spring 23 all possess a certain degree of elasticity and are independent of each other, allowing the movable spring assembly 2 to have both good elasticity and better strength, thus improving the overall service life of the movable spring assembly 2.

[0061] The bending parts 2121, 2221, 2321 further extend away from one end of the fixing parts 211, 221, 231 to form extension parts 2122, 2222, 2322. That is, the first bending part 2121, the second bending part 2221, and the third bending part 2321 further extend away from one end of the first fixing part 211, the second fixing part 221, and the third fixing part 231 to form the first extension part 2122, the second extension part 2222, and the third extension part 2322 respectively. Mounting holes 2123, 2223, 2323 for installing the contact part 201 are provided on the extension parts 2122, 2222, 2322. That is, overlapping first mounting holes 2123, second mounting holes 2223, and third mounting holes 2323 for installing the contact part 201 are provided on the first extension part 2122, the second extension part 2222, and the third extension part 2322. In the figure, two left and right contact parts 201 are provided on the extension parts 2122, 2222, 2322. With this arrangement, it is convenient to install the contact part 201 on the overlapping mounting holes 2123, 2223, 2323.

[0062] The extension parts 2122, 2222, 2322 further extend to form linkage parts 202 for connecting to a power component (not shown). With this arrangement, the power component can be a component such as a motor. After receiving a specific command signal, it can perform linkage on the linkage part 202, such as pushing and pulling the linkage part 202, causing the contact parts 201 on the extension parts 2122, 2222, 2322 to move up and down, and making the contact parts 201 electrically contact or disengage from the second contact parts 32 on the second main connection end 3, thereby realizing the corresponding relay function of the relay 200. <{

[0063] In this embodiment, the main connection end 1 includes a mounting part 11 for holding the fixing parts 211, 221, 231, an inclined part 12 extending obliquely away from the moving reed group 2 from the mounting part 11, and a connection part 13 further extending from the inclined part 12 for connecting to a terminal block (not shown). With this arrangement, the inclined part 12 and the connection part 13 are away from the main body parts 212, 222, 232 of the moving reed group 2, avoiding situations such as short circuits. The second main connection end 3 is used to connect to another terminal block (not shown).

[0064] Referring Figure 9 As shown, the present invention also protects a relay 200, including a relay housing, the zero - resistance moving reed 100 located inside the relay housing, and a power component for联动 with the zero - resistance moving reed 100. The relay 200 can achieve near - zero - resistance contact inside, making the relay 200 not heat up, saving electricity, and having high use safety.

[0065] This utility model also protects an electric meter (not shown), including a housing of the electric meter and a zero-resistance moving spring 100 located inside the housing. The main core component of the electric meter is the zero-resistance moving spring 100, which enables the electric meter to have excellent power transmission efficiency, achieve near-zero resistance contact, prevents the inside of the electric meter from overheating, enhances its safety, and gives the electric meter a core competitive advantage in the market.

[0066] It is worth noting that in this utility model, the order of the above steps is not limited and can be adjusted according to the actual situation, all of which are within the protection scope of this utility model.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0068] The directional terms used in the various technical features described in the above embodiments, such as front, back, left, right, up, and down, are used only for the convenience of describing and understanding the various technical features, and do not constitute a limitation on specific directions in the actual use of the technical solution.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A zero-resistance moving spring, characterized in that: The device includes a main connection end and a set of movable springs fixed to the main connection end at one end. The set of movable springs includes several movable springs stacked vertically. Each movable spring includes a fixing part for fixing to the main connection end and an elastic main body part extending from the fixing part to the other end. The set of movable springs has a contact part at the end away from the fixing part for selectively making electrical contact with or disengaging from the second main connection end. The fixing parts of the stacked movable springs each have a head end, which are offset from front to back. There is a gap between the upper and lower fixing parts. The zero-resistance movable springs have solidified solder extending from the head end of the fixing part into the gap between the pieces.

2. The zero-resistance moving spring according to claim 1, characterized in that: The main connecting end and the fixed part are respectively provided with riveting protrusions and riveting holes that are riveted together, and the riveting protrusions are integrally stretched from the main connecting end.

3. A zero-resistance moving spring according to claim 1, characterized in that: The moving spring assembly includes a first moving spring, a second moving spring, and a third moving spring stacked vertically. The head ends of the fixing parts of the first moving spring, the second moving spring, and the third moving spring are arranged in a stepped manner, and the solidified solder extends from the head ends into the gap between their respective springs.

4. A zero-resistance moving spring according to claim 3, characterized in that: The main body includes a curved portion that protrudes upward in an arc shape.

5. A zero-resistance moving spring according to claim 4, characterized in that: The curved portions of the first, second, and third movable springs are spaced apart in a semi-racetrack pattern.

6. A zero-resistance moving spring according to claim 4, characterized in that: The curved portion extends further away from the fixed portion to form an extension portion, which has a mounting hole for mounting the contact portion.

7. A zero-resistance moving spring according to claim 6, characterized in that: The extension further extends to a linkage for connection with the power component.

8. A zero-resistance moving spring according to claim 1, characterized in that: The main connection end includes a mounting portion for holding the fixing portion, an inclined portion extending from the mounting portion in a direction away from the moving spring assembly, and a connection portion extending further from the inclined portion for connecting to the terminal button.

9. A relay, characterized in that: It includes a relay housing, a zero-resistance moving spring located inside the relay housing according to any one of claims 1 to 8, and a power component for linkage with the zero-resistance moving spring.

10. An electrical meter, characterized in that: It includes a power meter housing and a zero-resistance moving spring located within the power meter housing according to any one of claims 1 to 8.

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