A readily detachable insulator connects a solder terminal and a circuit assembly

Abstract

The application discloses a detachable insulator connecting welding terminal and a circuit assembly, which comprises a sheet body; wherein a circular through hole is arranged in the middle of one end of the sheet body, and the diameter of the circular through hole is slightly larger than the diameter of an insulator needle; and the other end of the sheet body is a flat welding part which is used for welding with a solder pad of a printed board, so that the problem that solder tin is prone to flowing to a metal structural part after the insulator needle is directly welded with the printed board, thereby causing a short circuit of a circuit of the printed board, a large number of insulators, high difficulty in removing the printed board for maintenance, and poor welding reliability caused by wire connection can be solved; and the reliability and maintainability of the interconnection between the insulator and the solder pad of the printed board can be effectively improved by using the novel welding terminal.

Description

Technical Field

[0001] This application relates to the field of circuit technology, and in particular to an easily detachable insulator connection welding terminal and circuit assembly. Background Technology

[0002] As the operating frequency of radio frequency (RF) circuits continues to increase, in order to better isolate high- and low-frequency signals, a partitioned cavity approach is often adopted to achieve a reasonable division of circuit units. A common approach in RF circuit design is to place the power control circuit and the RF transmission circuit in separate upper and lower cavities, interconnected by electrically conductive insulators.

[0003] Typically, designers create through-holes on the printed circuit board (PCB) of power control circuits to allow the insulators to pass through, and then use soldering to reliably connect the insulator pins to the pads on the PCB. However, in practical applications, the following problems often arise: First, solder may flow downwards along the insulator pins due to gravity, potentially contacting metal structural components below the PCB after passing through the through-hole, leading to a short circuit at that point. Second, when the circuit function is complex, the number and density of insulators passing through the PCB are often large, making it difficult to clean the solder from the openings on the PCB when disassembling and repairing the PCB. Third, when using wires to solder the insulator pins to the pads on the PCB, the wire contact area is limited, resulting in poor soldering reliability. To solve these problems, this application designs a novel easily detachable soldering terminal. This soldering terminal is made of beryllium bronze, which has good conductivity, corrosion resistance, and solderability. Summary of the Invention

[0004] The main objective of this application is to provide an easily detachable insulator connection welding terminal and circuit assembly, aiming to solve the technical problems of solder flowing into the metal structural parts and causing short circuits in the printed circuit board after the energized insulator needle is directly welded to the printed circuit board, the difficulty of maintenance and disassembly of the printed circuit board due to the large number of insulators, and the poor welding reliability due to wire connection.

[0005] To achieve the above objectives, this application provides an easily detachable insulator connection welding terminal, comprising: a thin sheet body; wherein, a circular through hole is provided in the center of one end of the thin sheet body, the diameter of the circular through hole being slightly larger than the diameter of the insulator needle; the other end of the thin sheet body is a planar welding part, the planar welding part being used for welding to the pads of a printed circuit board.

[0006] Optionally, all four corners of the sheet-like body are chamfered.

[0007] Optionally, the gap between the inner diameter of the circular through hole and the outer diameter of the insulator pin is 0.05 mm to 0.2 mm.

[0008] Optionally, the fillet radius of the chamfer is 0.2 mm to 0.5 mm.

[0009] Optionally, the thickness of the sheet-like body is 0.3 mm to 1.0 mm.

[0010] In addition, to achieve the above objectives, this application also provides a circuit assembly, including: the aforementioned easily detachable insulator connection welding terminal, an insulator needle, a printed circuit board of a power control circuit, and a metal structural component; wherein, the printed circuit board of the power control circuit, the metal structural component, and the welding terminal are stacked; one end of the insulator needle passes sequentially through the circular through holes of the metal structural component, the printed circuit board of the power control circuit, and the welding terminal, and is welded to the welding terminal, the planar welding portion of the welding terminal is welded to the pad of the printed circuit board, and the other end of the insulator needle passes through the metal structural component.

[0011] This application proposes an easily detachable insulator connection welding terminal and circuit assembly, utilizing a thin-film main body. One end of the thin-film main body has a centrally located circular through-hole, the diameter of which is slightly larger than the diameter of the insulator needle. The other end of the thin-film main body is a planar welding portion for welding to the pads of a printed circuit board (PCB). This solves the problems of solder easily flowing into metal structural components and causing short circuits on the PCB after direct welding of the energized insulator needle to the PCB, the difficulty of repairing and disassembling the PCB due to the large number of insulators, and poor welding reliability due to wire connections. Using this novel welding terminal effectively improves the reliability and maintainability of the interconnection between the energized insulator and the PCB pads. Attached Figure Description

[0012] Figure 1 This diagram illustrates three problems that exist in the soldering of printed circuit boards and power insulators. Figure 1 (a) is a schematic diagram of the first problem faced in welding ordinary metal through holes; Figure 1 (b) is a schematic diagram of the second problem faced in welding through-holes in ordinary metals; Figure 1 (c) is a schematic diagram of the third problem faced in welding through-holes in ordinary metals;

[0013] Figure 2 This application describes a novel connection method between easily detachable insulator welding terminals and a printed circuit board.

[0014] Figure 3 These are three views of the novel easily detachable insulator welding terminal of this application.

[0015] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0016] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0017] Figure 1 (a) is a schematic diagram of the first problem faced by ordinary metal through-hole soldering. The diagram shows that the solder will flow along the insulator needle to the metal structure due to gravity, causing a short circuit in the printed circuit board. Figure 1 (b) is a schematic diagram of the second problem faced by ordinary metal through-hole soldering. The diagram shows that when there are many electrical insulators, it is difficult to clean the solder at all the openings of the printed circuit board at the same time, making the printed circuit board difficult to remove and repair. Figure 1 (c) is a schematic diagram of the third problem faced by ordinary metal through-hole soldering. The diagram shows that when the energized insulator pin is soldered to the pad on the printed circuit board using wire 3, the soldering reliability is poor.

[0018] refer to Figure 1 A detachable insulator connection welding terminal, comprising:

[0019] The thin-plate body 5 has a circular through hole 501 centered at one end, the diameter of which is slightly larger than the diameter of the insulator pin 1. The other end of the thin-plate body 5 is a planar welding part, which is used for welding to the pads of the printed circuit board.

[0020] This application designs a novel easily detachable insulator connection welding terminal for welding a power-on insulator to the corresponding pads on a printed circuit board 2. This application effectively solves the problems of solder easily flowing to the metal structural component 4 and causing short circuits on the printed circuit board 2 after direct welding of the power-on insulator pin to the printed circuit board 2; the difficulty of maintenance and disassembly of the printed circuit board 2 due to the large number of insulators; and poor welding reliability due to the connection of the wires 3. Using this novel welding terminal can effectively improve the reliability and maintainability of the interconnection between the power-on insulator and the pads on the printed circuit board 2.

[0021] The thin-plate body 5 has chamfered corners at all four sides. The gap between the inner diameter of the circular through-hole 501 and the outer diameter of the insulator pin is 0.05mm to 0.2mm, which avoids stress concentration during welding caused by sharp edges. The radius of the chamfer is 0.2mm to 0.5mm. The thickness of the thin-plate body 5 is 0.3mm to 1.0mm, a design that balances structural strength and welding process compatibility. The thin-plate body 5 is made of beryllium bronze with a conductivity ≥20% IACS and a tensile strength ≥1000MPa, which meets the high conductivity and mechanical strength requirements of high-frequency circuits. Beryllium bronze is a copper-based alloy material that not only has the advantages of high strength, hardness, and elastic limit, low elastic hysteresis, and good stability, but also has excellent properties such as fatigue resistance, corrosion resistance, wear resistance, low temperature resistance, non-magnetic properties, high electrical and thermal conductivity, and no sparks generated upon impact, making it very suitable for manufacturing welding terminals.

[0022] Figure 2 The assembly method of this novel easily detachable insulator welding terminal is presented. Figure 3 This is the basic structural form of the welding terminal. In use, one end with the circular through-hole 501 is fitted onto the insulator pin 1, and the other end is placed on the pad on the printed circuit board 2. The welding terminal is then connected to the insulator pin 1 and the pad on the printed circuit board 2 using a welding process. This new welding terminal not only solves the three problems encountered when welding insulators mentioned above, but also effectively improves the reliability and maintainability of the interconnection between the insulator and the pad on the printed circuit board 2. These advantages have been proven in practical applications.

[0023] Specifically, the new type of easily detachable insulator connects to the welded terminals, and the entire structure is as follows: Figure 3 As shown, the welding terminal is a thin-film structure with rounded rectangular edges due to the chamfering of all four corners. A circular through-hole 501 is centrally located at one end of the welding terminal, with a radius slightly larger than that of the insulator pin 1. This allows the welding terminal to be smoothly fitted onto the insulator pin 1 through the circular through-hole 501. The other end of the welding terminal is placed on a pad on the printed circuit board 2, and then welded to both the energized insulator pin 1 and the pad on the printed circuit board 2. Because the radius of the circular through-hole 501 is slightly larger than that of the insulator pin 1, solder will not flow to the metal structure 4 below the printed circuit board 2 when welding the welding terminal to the insulator pin 1, eliminating the possibility of short circuits. Since the solder remains on the welding terminal, disassembling the welding terminal is more convenient and faster when repairing the printed circuit board 2, improving maintainability. The circular opening allows the insulator pin 1 to contact the welding terminal from all sides, increasing the welding contact area, avoiding the possibility of cold solder joints, and improving welding reliability.

[0024] Based on the above embodiments, this application also provides a circuit assembly, including: the easily detachable insulator connection welding terminal provided in the aforementioned embodiments, an insulator pin 1, a printed circuit board 2 for a power control circuit, and a metal structural component 4. The printed circuit board 2 and the metal structural component 4 are stacked. One end of the insulator pin 1 passes sequentially through a circular through-hole 501 in the metal structural component 4, the printed circuit board 2, and the welding terminal, and is welded to the welding terminal. The planar welding portion of the welding terminal is welded to the pads of the printed circuit board 2. The other end of the insulator pin 1 is inserted into the metal structural component 4.

[0025] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A detachable insulator connection welding terminal, characterized in that, include: Thin-plate body; The thin sheet body has a circular through hole in the center of one end, and the diameter of the circular through hole is larger than the diameter of the insulator needle. The other end of the sheet-like body is a planar welding part, which is used to weld to the pads of the printed circuit board.

2. The easily detachable insulator connection welding terminal as described in claim 1, characterized in that, The four corners of the sheet-like main body are all chamfered.

3. The easily detachable insulator connection welding terminal as described in claim 1, characterized in that, The gap between the inner diameter of the circular through hole and the outer diameter of the insulator pin is 0.05 mm to 0.2 mm.

4. The easily detachable insulator connection welding terminal as described in claim 2, characterized in that, The fillet radius of the chamfer is 0.2 mm to 0.5 mm.

5. The easily detachable insulator connection welding terminal as described in claim 1, characterized in that, The thickness of the sheet-like body is 0.3 mm to 1.0 mm.

6. A circuit component, characterized in that, include: The detachable insulator connection welding terminal, insulator pin, printed circuit board of power control circuit and metal structural component as described in any one of claims 1-5; The power control circuit consists of a printed circuit board, metal structural components, and solder terminals stacked together. One end of the insulator needle passes sequentially through the circular through-holes of the metal structural component, the printed circuit board of the power control circuit, and the welding terminal, and is welded to the welding terminal. The planar welding portion of the welding terminal is welded to the pad of the printed circuit board. The other end of the insulator needle is inserted into the metal structural component.

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