Moving contact

Abstract

The utility model discloses a moving contact, which comprises an insulating seat, a first conducting strip and a second conducting strip, the first conducting strip and the second conducting strip are arranged on the upper side and the lower side of the insulating seat respectively, and a first silver contact and a second silver contact are arranged on the first conducting strip and the second conducting strip respectively. The first conductive sheet, the insulating seat and the second conductive sheet are respectively provided with a first via hole, a second via hole and a third via hole for the push rod to pass through. The first conducting strip and the second conducting strip are welded to the upper side and the lower side of the insulating base respectively. According to the utility model, not only is the matching precision higher, but also the labor cost is saved, and the cost rate is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of switch technology, and in particular to a moving contact of a quick-acting switch. Background Technology

[0002] Switches are widely used in the control circuits of various devices. In the existing technology, a quick-acting switch usually includes a housing, a driving element, a stationary contact, and a moving contact. By pushing the driving element to move, the moving contact set on the driving element is driven to connect or disconnect with the stationary contact, forming normally closed circuits and normally open circuits respectively, thereby controlling the on and off of the circuit.

[0003] Existing moving contacts typically include a moving contact support and a silver contact mounted on the support. The moving contact support is made of thin metal sheet, which has low strength and weak bending resistance, making it prone to deformation after frequent use, leading to a deterioration in switch performance. Based on these problems, the applicant of this application previously filed a utility model patent with patent application number 202421190134.X, which discloses a quick-acting switch. In this quick-acting switch, a mounting base is first provided at the end of the push rod, and then conductive sheets are provided on the upper and lower sides of the mounting base, forming a moving contact assembly with strong bending resistance, which prevents the conductive sheets from bending and deforming, thereby enhancing stability. However, since this moving contact (mounting base and conductive sheets) is assembled by manual riveting, it not only has low processing precision but also high labor costs. Therefore, it is necessary to improve this structure. Utility Model Content

[0004] The purpose of this invention is to provide a moving contact that not only has higher precision but also saves labor costs and significantly improves the cost-effectiveness ratio.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a moving contact, comprising an insulating base and a first conductive sheet and a second conductive sheet disposed on the upper and lower sides of the insulating base, wherein the first conductive sheet and the second conductive sheet are respectively provided with a first silver contact and a second silver contact, and the first conductive sheet, the insulating base and the second conductive sheet are respectively provided with a first through hole, a second through hole and a third through hole for a push rod to pass through; the first conductive sheet and the second conductive sheet are respectively welded to the upper and lower sides of the insulating base.

[0006] By adopting the above technical solution, the first and second conductive sheets are welded to the upper and lower sides of the insulating base, respectively, which greatly improves the structural strength of the moving contact and makes it less prone to bending during use. Furthermore, the welding assembly of this moving contact, compared to riveting, not only offers higher precision but also saves labor costs and significantly improves cost-effectiveness.

[0007] The present invention is further configured such that the first conductive sheet and the second conductive sheet are connected to the upper and lower sides of the insulating base by ultrasonic welding.

[0008] By adopting the above technical solution and using ultrasonic welding, not only is the welding speed fast and the strength high, but it also has the advantages of low cost and environmental protection. In addition, ultrasonic welding can also achieve seamless welding and has the advantage of beautiful weld points.

[0009] The present invention is further configured such that: the first conductive sheet has a first positioning recess at each end; the insulating seat has a first positioning protrusion that matches the first positioning recess; and the first positioning protrusion is welded to the first conductive sheet at the position corresponding to the first positioning recess; the second conductive sheet has a second positioning recess at each end; the insulating seat has a second positioning protrusion that matches the second positioning recess; and the second positioning protrusion is welded to the second conductive sheet at the position corresponding to the second positioning recess.

[0010] By adopting the above technical solution, the first conductive sheet and the second conductive sheet are end-welded, which achieves the advantage of high welding strength in the case of small-area welding. Moreover, the concave-convex positioning method not only facilitates the initial positioning processing, but also improves the stability of the connection structure between the first conductive sheet, the second conductive sheet and the insulating base.

[0011] The present invention is further configured such that the insulating base is made of plastic, and the first conductive sheet and the second conductive sheet are made of copper.

[0012] By adopting the above technical solution, plastic has good insulation and plasticity. The insulating base is made of plastic material, which not only has good insulation performance, but is also very easy to process. Copper parts have good conductivity and plasticity. The first and second conductive sheets are made of copper parts, which not only have excellent conductivity, but also have good processing performance.

[0013] The present invention is further configured such that the first conductive sheet is provided with a plurality of first positioning holes, the upper end face of the insulating seat is provided with a plurality of first positioning protrusions that fit with the first positioning holes, the second conductive sheet is provided with a plurality of second positioning holes, and the lower end face of the insulating seat is provided with a plurality of second positioning protrusions that fit with the second positioning holes.

[0014] By adopting the above technical solution, not only can it play a role in pre-positioning, making it easier for the first conductive sheet and the second conductive sheet to be accurately welded onto the insulating base, but it can also effectively improve the connection strength between the first conductive sheet and the insulating base, and between the second conductive sheet and the insulating base.

[0015] The present invention is further configured such that: a first through hole is formed on the first conductive sheet, the first silver contact is interference-fitted onto the first through hole, and the insulating seat is provided with a first clearance groove for making way for the inner end of the first silver contact at the position corresponding to the inner end of the first through hole; a second through hole is formed on the second conductive sheet, the second silver contact is interference-fitted onto the second through hole, and the insulating seat is provided with a second clearance groove for making way for the inner end of the second silver contact at the position corresponding to the inner end of the second through hole.

[0016] By adopting the above technical solution, the installation structure of the first silver contact and the second silver contact is simple and reliable, and easy to assemble and produce. Attached Figure Description

[0017] Figure 1 This is a first-view structural diagram of the entire utility model;

[0018] Figure 2 This is a second-view structural diagram of the entire utility model;

[0019] Figure 3 This is a cross-sectional view of the entire utility model;

[0020] Figure 4 This is an exploded view of the entire utility model;

[0021] Figure 5 This is a first-view structural schematic diagram of the insulating base of this utility model;

[0022] Figure 6 This is a second-view structural schematic diagram of the insulating base of this utility model.

[0023] In the figure: 1. Insulating base; 2. First conductive sheet; 3. Second conductive sheet; 4. First silver contact; 5. Second silver contact; 6. First through hole; 7. Second through hole; 8. Third through hole; 9. First positioning recess; 10. First positioning protrusion; 11. Second positioning recess; 12. Second positioning protrusion; 13. First positioning hole; 14. First positioning protrusion; 15. Second positioning hole; 16. Second positioning protrusion; 17. First through hole; 18. First clearance groove; 19. Second through hole; 20. Second clearance groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example: As attached Figures 1-6 The movable contact shown includes an insulating base 1 and a first conductive plate 2 and a second conductive plate 3 disposed on the upper and lower sides of the insulating base 1. The first conductive plate 2 and the second conductive plate 3 are respectively provided with a first silver contact 4 and a second silver contact 5. The first conductive plate 2, the insulating base 1, and the second conductive plate 3 are respectively provided with a first through hole 6, a second through hole 7, and a third through hole 8 for a push rod to pass through. In this embodiment, the area of ​​the first through hole 6 is greater than the area of ​​the second through hole 7, which is greater than the area of ​​the third through hole 8, thus forming a spring cavity to facilitate the movement of the spring plate inside. The first conductive plate 2 and the second conductive plate 3 are respectively welded to the upper and lower sides of the insulating base 1. Welding the first conductive plate 2 and the second conductive plate 3 to the upper and lower sides of the insulating base 1 significantly improves the structural strength of the movable contact, making it less prone to bending during use. Furthermore, the movable contact is assembled by welding, which, compared to riveting, not only provides higher precision but also saves labor costs and significantly improves the cost-effectiveness.

[0026] More specifically, the first conductive sheet 2 and the second conductive sheet 3 are connected to the upper and lower sides of the insulating base 1 respectively by ultrasonic welding. Ultrasonic welding not only offers advantages such as fast welding speed and high strength, but also low cost and environmental friendliness. Furthermore, ultrasonic welding can achieve seamless welding, resulting in aesthetically pleasing weld points.

[0027] As attached Figures 1-6 As shown, in this embodiment, the outer contours of the insulating base 1, the first conductive sheet 2, and the second conductive sheet 3 are all rectangular (otherwise, shapes such as circles, ellipses, and trapezoids are also within the protection scope). The first conductive sheet 2 has a first positioning recess 9 at both ends. The insulating base 1 has a first positioning protrusion 10 that matches the first positioning recess 9, and the first positioning protrusion 10 is welded to the first conductive sheet 2 at the position corresponding to the first positioning recess 9. In this embodiment, there are four first positioning recesses 9, which are respectively located at the four apex corners of the first conductive sheet 2. The second conductive sheet 3 has a second positioning recess 11 at both ends. The insulating base 1 has a second positioning protrusion 12 that matches the second positioning recess 11, and the second positioning protrusion 12 is welded to the second conductive sheet 3 at the position corresponding to the second positioning recess 11. In this embodiment, the cross-sectional shape of the second positioning protrusion 12 is U-shaped, covering the left and right ends of the second conductive sheet 3. The first conductive sheet 2 and the second conductive sheet 3 are end-welded, which achieves high welding strength in the case of small-area welding. The concave-convex positioning method not only facilitates the initial positioning process, but also improves the stability of the connection structure between the first conductive sheet 2, the second conductive sheet 3 and the insulating base 1.

[0028] The insulating base 1 is made of plastic, while the first conductive sheet 2 and the second conductive sheet 3 are made of copper. Plastic has good insulation and plasticity, so the insulating base 1, made of plastic, not only has good insulation performance but is also very easy to process. Copper has good conductivity and plasticity, so the first conductive sheet 2 and the second conductive sheet 3, made of copper, not only have excellent conductivity but also good processing performance.

[0029] As attached Figures 1-6 As shown, the first conductive sheet 2 has multiple first positioning holes 13, the upper surface of the insulating base 1 has multiple first positioning protrusions 14 that mate with the first positioning holes 13, the second conductive sheet 3 has multiple second positioning holes 15, and the lower surface of the insulating base 1 has multiple second positioning protrusions 16 that mate with the second positioning holes 15. In this embodiment, there are four first positioning protrusions 14 and four second positioning protrusions 16, both of which are cylindrical. Two first positioning protrusions 14 are located on the left side of the second through hole 7 on the insulating base 1, and two second positioning protrusions 16 are located on the right side of the second through hole 7 on the insulating base 1, and the two are symmetrically arranged. Two second positioning protrusions 16 are located on the left side of the second through hole 7 on the insulating base 1, and two are located on the right side of the second through hole 7 on the insulating base 1, and the two are symmetrically arranged. This design not only serves as a pre-positioning function, facilitating the precise welding of the first conductive sheet 2 and the second conductive sheet 3 onto the insulating base 1, but also effectively improves the connection strength between the first conductive sheet 2 and the insulating base 1, and between the second conductive sheet 3 and the insulating base 1.

[0030] As attached Figures 1-6 As shown, the first conductive sheet 2 has a first through hole 17, and the first silver contact 4 is interference-fitted into the first through hole 17. The insulating base 1 has a first clearance groove 18 at the inner end of the first through hole 17 to allow space for the inner end of the first silver contact 4. The second conductive sheet 3 has a second through hole 19, and the second silver contact 5 is interference-fitted into the second through hole 19. The insulating base 1 has a second clearance groove 20 at the inner end of the second through hole 19 to allow space for the inner end of the second silver contact 5. In this embodiment, the first through hole 17, the first clearance groove 18, the second through hole 19, and the second clearance groove 20 are all circular. The inner diameter of the first clearance groove 18 is larger than the inner diameter of the first through hole 17, and the inner diameter of the second clearance groove 20 is larger than the inner diameter of the second through hole 19. The mounting structure of the first silver contact 4 and the second silver contact 5 is simple and reliable, facilitating assembly and production.

[0031] In addition, a slot can be formed on the first conductive sheet 2 on the left and right sides corresponding to the first through hole 6, for the end of the spring plate for push rod reset to engage. The second conductive sheet 3 also has the same structure, improving its versatility.

Claims

1. A moving contact, comprising an insulating base (1), a first conductive sheet (2) and a second conductive sheet (3) arranged on the upper and lower sides of the insulating base (1), a first silver contact (4) and a second silver contact (5) arranged on the first conductive sheet (2) and the second conductive sheet (3) respectively, and a first via hole (6), a second via hole (7) and a third via hole (8) arranged on the first conductive sheet (2), the insulating base (1) and the second conductive sheet (3) respectively for a push rod to pass through; characterized in that: The first conductive sheet (2) and the second conductive sheet (3) are respectively welded on the upper and lower sides of the insulating seat (1).

2. A movable contact according to claim 1, characterized in that: The first conductive sheet (2) and the second conductive sheet (3) are respectively connected to the upper and lower sides of the insulating seat (1) by ultrasonic welding.

3. A movable contact according to claim 2, characterized in that: The first conductive sheet (2) is provided with a first positioning recess (9) at each end, the insulating seat (1) is provided with a first positioning protrusion (10) matching the first positioning recess (9), and the first positioning protrusion (10) is welded together with the first positioning recess (9) of the first conductive sheet (2); the second conductive sheet (3) is provided with a second positioning recess (11) at each end, the insulating seat (1) is provided with a second positioning protrusion (12) matching the second positioning recess (11), and the second positioning protrusion (12) is welded together with the second positioning recess (11) of the second conductive sheet (3).

4. A movable contact according to claim 1, characterized in that: The insulating seat (1) is made of plastic material, and the first conductive sheet (2) and the second conductive sheet (3) are made of copper.

5. A movable contact according to claim 1, characterized in that: The first conductive sheet (2) is provided with a plurality of first positioning holes (13), the upper end surface of the insulating seat (1) is provided with a plurality of first positioning protrusions (14) matching the first positioning holes (13), the second conductive sheet (3) is provided with a plurality of second positioning holes (15), and the lower end surface of the insulating seat (1) is provided with a plurality of second positioning protrusions (16) matching the second positioning holes (15).

6. A movable contact according to claim 1, characterized in that: The first conductive sheet (2) is provided with a first through hole (17), the first silver contact (4) is interference fitted on the first through hole (17), and the insulating seat (1) is provided with a first displacement slot (18) at a position corresponding to the inner end of the first through hole (17) for displacing the inner end of the first silver contact (4); the second conductive sheet (3) is provided with a second through hole (19), the second silver contact (5) is interference fitted on the second through hole (19), and the insulating seat (1) is provided with a second displacement slot (20) at a position corresponding to the inner end of the second through hole (19) for displacing the inner end of the second silver contact (5).

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