Linkage device for switching electrical contacts without flux

Abstract

This application discloses a flux-free electrical contact switching linkage device, including a first contact plate and a second contact plate, which are attached to each other. A pressure-welding stamping area is provided on the side of the first contact plate facing away from the second contact plate, and a first fusion welding area is provided on the side of the first contact plate facing the second contact plate. The pressure-welding stamping area and the first fusion welding area are aligned. The first fusion welding area has a first fusion welding bump, which is formed by pre-stamping the pressure-welding stamping area to raise the first fusion welding area. After energization, the resistance is highest at the first fusion welding bump. Current passing through the first fusion welding bump generates a large amount of Joule heat, forming a liquid metal nucleus at the first fusion welding bump, thus welding the first contact plate and the second contact plate together. This welding method eliminates the need for flux, saving the process of applying flux during welding, reducing costs, and improving work efficiency.

Description

Technical Field

[0001] This application relates to the field of electronic manufacturing, and in particular to a linkage device for switching electrical contacts without the need for flux. Background Technology

[0002] With the continuous advancement of science and technology, the application of new materials and processes is becoming increasingly widespread. Welding components play a crucial role in this field. New materials and processes often have unique welding requirements that traditional welding methods struggle to meet. However, through continuous innovation and optimization, welding components provide welding solutions adapted to new materials and processes, enabling high-quality welding of various materials and ensuring the strength and reliability of welded joints.

[0003] Traditional soldering of components involves adding tin or other flux. When soldering these components manually, it is necessary to manually add tin or other flux, making the soldering process complex, involving multiple steps, and resulting in low efficiency. Utility Model Content

[0004] To address the challenges of traditional soldering components, which requires manual application of solder or other flux, resulting in a complex, inefficient, and lengthy soldering process, a flux-free electrical contact switching linkage device is provided.

[0005] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0006] A flux-free electrical contact switching linkage device includes a first contact plate and a second contact plate, which are attached to each other. The side of the first contact plate facing away from the second contact plate is provided with a pressure welding stamping area, and the side of the first contact plate facing the second contact plate is provided with a first fusion welding area. The pressure welding stamping area and the first fusion welding area are aligned. The first fusion welding area is provided with a first fusion welding protrusion, which is formed by pre-stamping the pressure welding stamping area to raise the first fusion welding area.

[0007] By adopting the above technical solution, before power is applied, the first and second contact plates are first bonded together. Pressure is applied to the first welding stamping area of ​​the first contact plate and the second contact plate area to ensure that the first welding bump makes tight contact with the second contact plate. After power is applied, because the first and second contact plates are in contact through the first welding bump, the resistance at the first welding bump is the highest. The current passing through the first welding bump generates a large amount of Joule heat, and the temperature at the first welding bump rises, forming a liquid metal nucleus. The first and second contact plates are then welded together. Power is then turned off, and the welding process ends after cooling. This welding method eliminates the need for flux, saving the process of applying flux during welding, reducing costs, and improving work efficiency.

[0008] Optionally, the number of first fusion welding zones is at least 2, and they are spaced apart along the length of the first electrode plate; the number of pressure welding stamping zones is equal to the number of first fusion welding zones, and they correspond one-to-one.

[0009] By adopting the above technical solution, the number of weld joints is increased, thereby improving the strength of the weld.

[0010] Optionally, the number of first welding bumps in the first welding zone is at least three, and the first welding bumps are distributed in a circumferential array inside the first welding zone.

[0011] By adopting the above technical solution, the circumferentially distributed first fusion welding bumps can effectively balance the stress borne by each welding point, avoiding the problem of incomplete welding or weld failure caused by local stress concentration.

[0012] Optionally, a second welding area is provided on the side of the second contact plate facing the first contact plate. When the second contact plate is aligned and attached to the first contact plate, the second welding area is aligned with the first welding area. A second welding protrusion is provided on the second welding area. The second welding protrusion is formed by the second contact plate being bulged under pressure.

[0013] By adopting the above technical solution, both the first and second electrical contact boards have welding protrusions, which can be welded to each other, resulting in a stronger weld.

[0014] Optionally, the number of second welding bumps in each second welding zone can be multiple.

[0015] By adopting the above technical solution, three or more second welding bumps can further enhance the welding strength of the first and second electrical contact plates.

[0016] Optionally, the number of first welding bumps in each first welding zone is at least three. When the first electrode plate and the second electrode plate are in relative contact, the first welding bumps and the second welding bumps are arranged in a staggered manner, with the first welding bump located between the two second welding bumps.

[0017] By adopting the above technical solution, after welding, the fusion welding bumps can not only be firmly welded to the first and second electrical contact plates, but also be firmly welded to adjacent fusion welding bumps, making the welding of the first and second electrical contact plates more secure.

[0018] Optionally, the second welding bumps in each of the second welding zones are arranged in a circumferential array.

[0019] By adopting the above technical solution, both the first and second welding bumps are circumferentially distributed. During welding, the weld joint is circumferentially distributed, which can effectively balance the stress borne by each weld point and make the weld more robust.

[0020] Optional applications include contactors, thermostats, miniature circuit breakers, and smart molded case circuit breakers.

[0021] In summary, this application has at least the following beneficial effects:

[0022] By applying pressure to the pressure welding stamping area, the first welding protrusion on the first welding area can be made to come into close contact with the second electrical contact plate. After being energized, the first welding protrusion generates heat from the current to form a metal nucleus, which welds the first electrical contact plate and the second electrical contact plate together without the use of other fillers. Attached image description:

[0023] Figure 1 Schematic diagram of a linkage device for switching electrical contacts without flux;

[0024] Figure 2 This is a schematic diagram of the first junction box;

[0025] Figure 3 This is a schematic diagram of the second junction box;

[0026] Figure 4 This is a schematic diagram of the joint between the first and second electrical connectors.

[0027] Figure label:

[0028] 1. First electrical contact plate; 11. First through hole; 12. First fusion welding area; 13. First fusion welding bump; 14. Pressure welding stamping area; 2. Second electrical contact plate; 21. Second through hole; 22. Second fusion welding area; 23. Second fusion welding bump. Detailed Implementation

[0029] like Figure 1 As shown, the flux-free electrical contact switching linkage device includes a first contact plate 1 and a second contact plate 2, which are the same size and shape.

[0030] like Figure 1 and Figure 2 As shown, the first electrical contact plate 1 includes a first through hole 11, a first fusion welding area 12, a first fusion welding bump 13, and a pressure welding stamping area 14.

[0031] There are two first through holes 11, located at both ends of the first electrical plate 1, and the first through holes 11 penetrate the first electrical plate 1.

[0032] There are at least two first fusion welding zones 12, both located on the side of the first electrical contact plate 1 that is close to the second electrical contact plate 2, and located between the two first through holes 11, spaced apart along the length of the first electrical contact plate 1. In this example, there are two first fusion welding zones 12.

[0033] There are at least three first fusion welding bumps 13 within each first fusion welding zone 12. The first fusion welding bumps 13 on any one first fusion welding zone 12 are arranged circumferentially, with gaps between adjacent first fusion welding bumps 13. The size of the gaps is equal to that of the first fusion welding bumps 13. The first fusion welding bumps 13 are formed by pre-stamping the first fusion welding zone 12. In this example, there are six first fusion welding bumps 13 within each first fusion welding zone 12.

[0034] The pressure welding stamping area 14 is located on the side away from the second electrical contact plate 2, and the number of pressure welding stamping areas 14 and the positions of the first fusion welding areas 12 are equal and correspond one-to-one.

[0035] like Figure 1 and Figure 3 As shown, the second junction board 2 includes a second through hole 21, a second welding zone 22, and a second welding bump 23.

[0036] There are two second through holes 21, located at both ends of the second electrical plate 2. The second through holes 21 penetrate the second electrical plate 2. The second through holes 21 and the first through holes 11 are the same size and have the same shape. When the first electrical plate 1 and the second electrical plate 2 are attached, the first through holes 11 and the second through holes 21 can be aligned one by one.

[0037] There are at least two second fusion welding zones 22, both located on the side of the second electrical plate 2 closest to the first electrical plate 1, and located between the two second through holes 21, spaced apart along the length of the second electrical plate 2. In this example, there are two second fusion welding zones 22.

[0038] There are at least three second welding protrusions 23 within each second welding zone 22. The second welding protrusions 23 on any given second welding zone 22 are arranged circumferentially, with gaps between adjacent protrusions 23. The gaps are equal in size to the protrusions 23. The second welding protrusions 23 are formed by pre-stamping the second welding zone 22. In this example, there are six second welding protrusions 23 within each second welding zone 22.

[0039] like Figure 4 As shown, when the first contact plate 1 and the second contact plate 2 are attached and aligned, the first through hole 11 and the second through hole 21 can be aligned, the first fusion welding area 12 and the second fusion welding area 22 can be aligned, the first fusion welding protrusion 13 can be inserted into the corresponding gap of the second fusion welding area 22, the second fusion welding protrusion 23 can be inserted into the corresponding gap of the first fusion welding area 12, and the adjacent first fusion welding protrusion 13 and second fusion welding protrusion 23 can be in close contact.

[0040] The working effect of this utility model is as follows:

[0041] Before power is applied, the first contact plate 1 and the second contact plate 2 are brought together. The first welding protrusion 13 is inserted into the gap in the second welding area 22, and the second welding protrusion 23 is inserted into the gap in the first welding area 12. Pressure is applied to the pressure welding stamping area 13 by the external pressure component, so that the adjacent first welding protrusion 13 and second welding protrusion 23 can be in close contact.

[0042] When the first electrode plate 1 and the second electrode plate 2 are energized, the first electrode plate 1 and the second electrode plate 2 are in contact through the first welding protrusion 13 and the second welding protrusion 23. The resistance at the contact point is the largest. When the current passes through this point, Joule heating will be generated, a large amount of heat will be generated, and the temperature will rise. The first welding protrusion 13 and the second welding protrusion 23 are connected together to form a liquid metal nucleus.

[0043] As the duration increases, the weld nugget grows radially and axially until it stabilizes, and the first electrode plate 1 and the second electrode plate 2 are welded together. Power is then cut off, and the process is allowed to cool, at which point the welding process is complete. In-mold welded components produced in this way do not require additional flux, saving the need for flux addition, simplifying the workflow, and improving efficiency.

[0044] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of protection claimed by the present invention, they are protected by patent law.

Claims

1. A flux-free electrical contact switching linkage device, comprising a first contact plate (1) and a second contact plate (2), characterized in that, The first contact plate (1) and the second contact plate (2) are attached to each other. The first contact plate (1) is provided with a pressure welding stamping area (14) on the side facing away from the second contact plate (2). The first contact plate (1) is provided with a first fusion welding area (12) on the side facing the second contact plate (2). The pressure welding stamping area (14) and the first fusion welding area (12) are aligned. The first fusion welding area (12) is provided with a first fusion welding protrusion (13). The first fusion welding protrusion (13) is formed by the pressure welding stamping area (14) pre-stamping the first fusion welding area (12) to form a raised part.

2. The fluxless electric contact switching link device according to claim 1, characterized in that, The number of first fusion welding zones (12) is at least 2, and they are spaced apart along the length of the first electrical contact plate (1); the number of pressure welding stamping zones (14) is equal to the number of first fusion welding zones (12), and they are kept in correspondence.

3. The fluxless electric contact switching link device according to claim 1, wherein The number of first welding bumps (13) in the first welding zone (12) is at least three, and the first welding bumps (13) inside the first welding zone (12) are distributed in a circular array.

4. The fluxless electric contact switching link device according to claim 1, wherein The second electrical contact plate (2) has a second welding area (22) on the side facing the first electrical contact plate (1). When the second electrical contact plate (2) is aligned and attached to the first electrical contact plate (1), the second welding area (22) is aligned with the first welding area (12). The second welding area (22) has a second welding protrusion (23), which is formed by the second electrical contact plate (2) being bulged under pressure.

5. The flux-free electric contact switching link device according to claim 4, characterized in that The number of second weld bumps (23) in each second weld zone (22) is at least three.

6. The flux-free electric contact switching link device according to claim 4, characterized in that The number of first welding bumps (13) in each first welding zone (12) is at least three. When the first electrical plate (1) and the second electrical plate (2) are in relative contact, the first welding bumps (13) and the second welding bumps (23) are arranged alternately and the first welding bumps (13) are located between the two second welding bumps (23).

7. The flux-free electric contact switching link device according to claim 5, characterized in that The second welding bumps (23) in each of the second welding zones (22) are arranged in a circular array.

8. The flux-free electrical contact switching linkage device according to any one of claims 1 to 7, characterized in that... It is used in contactors, thermostats, miniature circuit breakers and intelligent molded case circuit breakers.

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