Electronic component hot plug device
By combining a hot-swappable base and a soldering fixture, the problems of concentricity and perpendicularity during the soldering process are solved, solder blockage is prevented, and reliable connection and rapid replacement of electronic components are achieved, reducing replacement costs.
Patent Information
- Application Number
- CN202422996163.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-05
AI Technical Summary
During PCB soldering, it is difficult to ensure the concentricity and perpendicularity of the hot-swap base and the printed circuit board, and molten solder can easily flow into the space between the hot-swap base and the via, causing pad blockage.
It adopts a combination of hot-swappable base and welding fixture, including connecting cylinder, connecting claw unit and limiting rod. The limiting rod ensures concentricity and perpendicularity, and fills the through hole space to prevent solder blockage.
It achieves precise alignment between the hot-swap base and the printed circuit board, avoids solder blockage, ensures reliable connection and quick replacement of electronic components, and reduces replacement costs.
Smart Images
Figure CN223600094U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to printed circuit board technical field, more particularly, relate to a kind of electronic component hot plug device. BACKGROUND
[0002] PCB (printed circuit board) is one of important components of electronic industry. Almost every electronic device, small to electronic watch, calculator, large to computer, communication electronic device, as long as integrated circuit and other electronic components, in order to electrical interconnection between them, PCB is used.
[0003] PCB is installed with resistor, capacitor, diode, triode, inductor and other electronic components, usually electronic components and PCB on conductor or pad are connected by welding. PCB electronic component welding is a key process step in electronic industry manufacturing, for ensuring reliable electrical connection and mechanical fixation between electronic components and PCB. PCB welding has the following methods: 1, surface mount technology 2, plug-in welding 3, hot air welding 4, wave soldering.
[0004] Regardless of which welding method is used, in the process of electrical system operation, to add or remove hardware equipment, usually need to shut down electrical system, after old electronic components are disassembled and welded, new electronic components are welded to the original position. Or it is to replace the whole set of PCB. For the whole system, it is very time-consuming to disassemble and re-weld electronic components. If manual welding is used when replacing, it is difficult to ensure the welding quality of components, which can easily lead to electrical connection failure or mechanical fixation failure; replacing the whole set of PCB is very expensive and has high cost.
[0005] Therefore, electronic components with high replacement frequency can be installed on PCB using hot plug method. Hot plug means adding or removing hardware equipment without shutdown or restart during electrical system operation.
[0006] The technology of realizing hot plug needs to weld a hot plug base on PCB, and the hot plug base is electrically connected with PCB circuit to enable the pin of electronic component to be inserted into the hot plug base and electrically connected with the hot plug base.
[0007] Before welding, the center of hot plug base and the via of printed circuit board have concentricity requirement, and the hot plug base and the surface of the pad of printed circuit board have perpendicularity requirement. However, there is no suitable tool to ensure concentricity and perpendicularity in the welding process at present.
[0008] In addition, in the molten state, soldering tin will flow into the hot plug base and the via under the action of tension due to capillary phenomenon, and after cooling, it will cause pad blockage. How to ensure that soldering tin does not block the hole of hot plug base and via is also a problem to be studied.
[0009] To this end, a reliable hot plug base and a reliable welding tool are needed to improve the welding precision and quality of the hot plug base. Content of the utility model
[0010] The utility model discloses to the hot plug base and printed circuit board welding process, it is difficult to guarantee concentricity and perpendicularity, and the molten state's solder flows into the hot plug base and via hole between and leads to the problem of pad blockage, provide a kind of electronic component hot plug device, by the cooperation of welding tool and hot plug base, it can guarantee concentricity and perpendicularity, also prevent solder from flowing into the hot plug base and via hole between, to avoid pad blockage.
[0011] The technical scheme adopted is as follows:
[0012] An electronic component hot plug device includes a hot plug base, the hot plug base includes:
[0013] The connecting cylinder is a cylinder with both ends not closed, one end of the connecting cylinder is coaxially welded on the via hole or pad of the printed circuit board, and the inner diameter of the connecting cylinder is equal to the pin diameter of the electronic component;
[0014] The connecting claw unit is coaxially connected to the other end of the connecting cylinder in a gradually shrinking manner away from the connecting cylinder.
[0015] Optionally, the material of the connecting cylinder is beryllium bronze.
[0016] Optionally, the connecting claw unit includes multiple connecting claws, the multiple connecting claws are uniformly distributed in the circumferential direction at the other end of the connecting cylinder, and there is a gap between adjacent connecting claws, and all the connecting claws gradually approach the connecting cylinder in the direction away from the connecting cylinder to form a reduced diameter opening.
[0017] Optionally, the size of the reduced diameter opening is less than or equal to the diameter of the pin of the electronic component.
[0018] Optionally, the hot plug device further includes a welding tool, the welding tool includes a limiting plate and a limiting rod, the limiting plate is a flat plate, the size of the limiting plate is larger than the via hole diameter of the printed circuit board,
[0019] A limiting rod perpendicular to the plate surface is fixedly connected to the plate surface of the limiting plate, the diameter of the limiting rod is the same as the via hole diameter of the printed circuit board, and the diameter of the limiting rod is the same as the inner diameter of the connecting cylinder,
[0020] The limiting rod is used to penetrate into the printed circuit board from the side opposite to the electronic component, and penetrate out of the printed circuit board from the side of the electronic component, the hot plug base is sleeved outside the limiting rod to ensure the concentricity of the hot plug base and the via hole of the printed circuit board, and the perpendicularity of the printed circuit board.
[0021] Optionally, the length of the limiting rod exceeds the sum of the thickness of the printed circuit board, the thickness of the solder pad and the length of the hot plug base.
[0022] The utility model has the following beneficial effects:
[0023] (1) The electronic component hot plug device can guarantee the perpendicularity and concentricity of the connecting cylinder axis and the solder pad surface of the printed circuit board.
[0024] (2) The limiting rod fills the space in the via and the hot plug base, which can guarantee that the solder does not block the hot plug base hole and the via.
[0025] (3) The material of the hot plug base is beryllium bronze, which has high hardness, elastic limit, fatigue limit and wear resistance, and also has good corrosion resistance, thermal conductivity and electrical conductivity, and does not produce sparks when impacted.
[0026] (4) The PCB using the hot plug device can be quickly removed from the PCB or added to the PCB without shutting down the electrical system when adding or removing hardware devices. BRIEF DESCRIPTION OF DRAWINGS
[0027] The above features and technical advantages of the utility model will become more apparent and easier to understand through the following description of the embodiments thereof in conjunction with the accompanying drawings.
[0028] Figure 1 is a three-dimensional schematic view of the hot plug base of the embodiment of the application.
[0029] Figure 2 is a three-dimensional schematic view of the welding tool of the embodiment of the application.
[0030] Figure 3 is a three-dimensional schematic view of the via and solder pad of the printed circuit board.
[0031] Figure 4 is an assembly schematic view of the welding tool and the hot plug base of the embodiment of the application. DETAILED DESCRIPTION
[0032] The embodiments described in the utility model will be described below with reference to the accompanying drawings. Those skilled in the art can realize that the described embodiments can be modified in various ways or combinations without deviating from the spirit and scope of the utility model. Therefore, the drawings and the description are illustrative in nature, and are not used to limit the protection scope of the claims. In addition, in the specification, the drawings are not drawn to scale, and the same reference numerals represent the same parts.
[0033] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" should be understood in a broad sense, for example, "connecting" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium. Among them, "fixed connection" refers to the relative position relationship after being connected with each other does not change. "Rotary connection" refers to the relative rotation after being connected with each other. The orientation terms mentioned in the embodiments of the present application, such as "upper", "lower", "inner", "outer" and the like, are only the direction of the drawing, therefore, the orientation terms used are for better, clearer illustration and understanding of the embodiments of the present application, and are not indicative or implied that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the present application. Among them, the integrated structure of two components obtained by the one-piece molding process refers to the process of forming one of the two components, the component is connected with the other component together, without the need for reprocessing (such as bonding, welding, buckle connection, screw connection) method to connect the two components together.
[0034] The electronic component hot plug device of the present application comprises a hot plug base and a welding tool, wherein, as shown in Figure 1 The hot plug base comprises a connecting cylinder 100 for welding on the via or pad of the printed circuit board; a connecting claw unit 200 connected at the end of the connecting cylinder 100, gradually shrinking away from the connecting cylinder 100, and the inside is used for conductive connection with the pin of the electronic component.
[0035] Among them, the connecting cylinder 100 is a cylindrical shape with both ends not closed, used for inserting the pin of the electronic component into the area surrounded by multiple connecting claws 200.
[0036] The material of the hot plug base can be beryllium bronze. Beryllium bronze is a kind of tin-free bronze with beryllium as the main alloy component. Containing 1.7-2.5% beryllium and a small amount of nickel, chromium, titanium and other elements, after quenching and aging treatment, the strength limit can reach 1250-1500MPa, close to the level of medium strength steel. In the quenched state, the plasticity is very good, which can be processed into the hot plug base of the electronic component. The connecting cylinder 100 has high hardness, elastic limit, fatigue limit and wear resistance, and also has good corrosion resistance, thermal conductivity and electrical conductivity, and does not produce sparks when impacted.
[0037] The connecting cylinder 100 is not limited to be a cylinder, for example, the cross section can also be polygonal, as long as it is consistent with the pin cross section shape of the electronic component, but it is preferred to be a cylinder, and the inner diameter should be equal to the pin diameter of the electronic component, so that the pin can be electrically connected through the connecting cylinder 100 and the connecting claw unit 200. Preferably, the inner diameter of the connecting cylinder 100 is equal to the pin diameter of the electronic component, so that the pin is electrically connected with the connecting cylinder 100 and the connecting claw unit 200.
[0038] The end of the connecting cylinder 100 opposite to the connecting claw unit 200 can be fixed on the printed circuit board by welding, specifically, coaxially fixed on the via or pad of the printed circuit board, so as to be electrically connected with the printed circuit board.
[0039] The connecting claw unit 200 includes a plurality of connecting claws 210 coaxially fixed at the end of the connecting cylinder 100. Specifically, the plurality of connecting claws 210 are uniformly distributed in the circumferential direction at the end of the connecting cylinder 100. And there is a certain gap 220 between adjacent connecting claws 210, and for each connecting claw 210, the size gradually decreases in the direction away from the connecting cylinder 100, and the ends of all connecting claws in the direction away from the connecting cylinder 100 gradually converge or substantially converge to form a reduced diameter opening, thereby forming a structure that gradually reduces in diameter from the end of the connecting cylinder 100 in the direction away from the connecting cylinder 100. And the size of the reduced diameter opening should be less than or equal to the diameter of the pin of the electronic component, so as to be electrically connected with the pin.
[0040] The connecting claw unit 200 can be separately processed and welded with the connecting cylinder 100, or it can be integrally formed, for example, a part of a hollow cylinder can be used as a connecting cylinder, and the remaining part can be uniformly cut in the circumferential direction to form a plurality of axially extending gaps, and the end is converged and contracted to form the connecting claw unit 200.
[0041] The electronic component hot plug device of the present application also includes a welding tool 300, which firmly and accurately welds the electronic component hot plug base to the PCB through the welding tool. As shown in Figure 2 The welding tool 300 includes a limiting plate 310 and a limiting rod 320, and the limiting plate 310 is a planar plate. As shown in Figure 2 It is a planar circular plate, but it can also be a planar square plate, or other polygonal plates, etc., which are not limited here, and the following will be described taking the planar circular plate as an example.
[0042] The limiting rod 320 is arranged on the surface of the limiting plate 310 perpendicularly to the surface, and is coaxial with the limiting plate 310. The diameter of the limiting rod 320 is the same as the diameter of the through hole of the printed circuit board and the inner diameter of the connecting cylinder 100, so that the connecting cylinder 100 can be sleeved on the outer periphery of the limiting rod 320, and the connecting cylinder 100 is aligned with the through hole or the pad of the printed circuit board. In addition, the length of the limiting rod 320 should be longer than the sum of the thickness of the printed circuit board, the thickness of the pad and the length of the hot plug base, so that when the hot plug base is sleeved on the limiting rod 320, the limiting rod 320 can protrude out of the hot plug base.
[0043] In some embodiments, the end of the limiting rod 320 is chamfered 330, so that the hot plug base is more easily sleeved on the limiting rod 320.
[0044] As shown in Figure 3 The printed circuit board 400 has a through hole 410, and the pad is fixedly connected to the surface of the through hole, and the pad is in conductive connection with the printed circuit board 400. Before the welding process, the center of the connecting cylinder 100 and the through hole of the printed circuit board should have concentricity requirement; the bottom surface of the base of the connecting cylinder 100 should also be in close contact with the pad of the printed circuit board, that is, the axis of the connecting cylinder 100 and the surface of the pad of the printed circuit board should have perpendicularity requirement. Therefore, the first function of the welding tool is to ensure the concentricity and perpendicularity before the welding process.
[0045] In addition, during the welding process of the electronic component hot plug base and the PBC, because the size of the connecting cylinder 100 and the through hole is relatively small, the molten solder will flow into the space between the hot plug base and the through hole under the action of capillary phenomenon and tension, and after cooling, the pad will be blocked. The welding tool is made of stainless steel, which has the characteristic of not being stained with solder during welding. Therefore, the second function of the welding tool is to ensure that the solder does not block the hole of the hot plug base and the through hole during the welding process.
[0046] The welding tool of the present application is used, as shown in Figure 4 The limiting rod 320 passes through the through hole 410 of the printed circuit board 400, so that the limiting plate 310 is in close contact with the printed circuit board 400 on the side opposite to the electronic component. Because the diameter of the limiting rod 320 is the same as the diameter of the through hole of the printed circuit board, the concentricity of the limiting rod 320 and the through hole of the printed circuit board can be ensured, so that the concentricity of the connecting cylinder 100 and the through hole of the printed circuit board can be ensured.
[0047] Because the limiting rod 320 has a vertical relationship with the limiting plate 310, the limiting rod 320 can ensure the perpendicularity of the surface of the pad 420 of the printed circuit board, and the connecting cylinder 100 can ensure the perpendicularity of the surface of the pad 420 of the printed circuit board.
[0048] And by the limiting rod 320 inserted into the via hole 410, and beyond the height of the hot plug base, so as to completely fill the via hole and the space in the hot plug base, can guarantee that the solder does not block the hot plug base hole and the via hole.
[0049] Through the welding tool 300, the electronic component hot plug base can be accurately arranged on the PCB.
[0050] The following describes the use method of the electronic component hot plug device, including the following steps:
[0051] Step S1, measure the thickness of the pin of the electronic component, according to the thickness of the pin, select the appropriate size of the hot plug base, so that the inner diameter of the connecting cylinder 100 is equal to the pin diameter of the electronic component, so that the pin can be connected with the connecting claw unit 200 through the connecting cylinder 100. Preferably, the inner diameter of the connecting cylinder 100 is equal to the pin diameter of the electronic component, so that the pin is in conductive connection with the connecting cylinder 100 and the connecting claw unit 200.
[0052] Step S2, according to the diameter of the via hole 410 of the printed circuit board 400, customize the appropriate welding tool. Specifically, the size of the limiting plate 310 of the welding tool should be larger than the diameter of the via hole 410, and the diameter of the limiting rod 320 is the same as the diameter of the via hole 410.
[0053] Step S3, the limiting rod 320 is inserted into the printed circuit board from the side opposite to the electronic component, so that the limiting rod is inserted from the side of the electronic component, and the limiting plate 310 is reserved on the side opposite to the electronic component.
[0054] Step S4, install the hot plug base, wrap the hot plug base around the limiting rod 320, so that the end of the connecting cylinder is in uniform contact with the surface of the solder pad 420 of the printed circuit board, and ensure the correct position between the hot plug base and the welding tool. As Figure 4 As shown, the connecting claws have a gap between them, so that the connecting claw unit has a certain elasticity, and the limiting rod 320 can be inserted out of the reduced diameter opening.
[0055] Step S5, according to the welding characteristics of the electronic component, select hot air welding, wave soldering or direct manual welding. The connecting seat 100 is welded on the surface of the solder pad 420.
[0056] The welding time is different according to the type of welding. The welding temperature is between 180 degrees Celsius and 250 degrees Celsius for lead solder, or between 210 degrees Celsius and 280 degrees Celsius for lead-free solder.
[0057] Step S6, the limiting rod 320 is extracted from the hot plug base, the welding tool is removed, the PCB is cleaned, and the whole welding process is completed.
[0058] It should be noted that the present application does not discuss the electrical level, the latch effect, the static problem, the surge problem and the interference to the bus caused by the hot plug.
[0059] The above only describes the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A hot-swappable device for electronic components, characterized in that, include: Hot-swap base, the hot-swap base comprising: The connecting cylinder is a cylindrical shape that is not closed at both ends. One end is coaxially soldered to a via or pad on a printed circuit board, and the inner diameter of the connecting cylinder is equal to the pin diameter of the electronic component. The connecting claw unit is coaxially connected to the other end of the connecting cylinder in a manner that gradually retracts away from the connecting cylinder.
2. The electronic component hot-swap device according to claim 1, characterized in that, The connecting cylinder is made of beryllium bronze.
3. The electronic component hot-swap device according to claim 1, characterized in that, The connecting claw unit includes multiple connecting claws, which are evenly distributed along the circumferential direction at the other end of the connecting cylinder, and there is a gap between adjacent connecting claws. All connecting claws gradually move closer together in the direction away from the connecting cylinder to form a narrowing opening.
4. The electronic component hot-swap device according to claim 3, characterized in that, The diameter of the reduced aperture is less than or equal to the diameter of the pin of the electronic component.
5. The electronic component hot-swap device according to claim 3, characterized in that, The hot-swap device also includes a welding fixture, which includes a limiting plate and a limiting rod. The limiting plate is a planar plate, and its size is larger than the diameter of the via on the printed circuit board. A limiting rod perpendicular to the surface of the limiting plate is fixedly connected to the plate surface. The diameter of the limiting rod is the same as the diameter of the through hole of the printed circuit board and the same as the inner diameter of the connecting cylinder. The limiting rod is used to enter the printed circuit board from the side opposite to the electronic component and exit from the side of the electronic component on the printed circuit board. By fitting the hot-swap base around the outer periphery of the limiting rod, the concentricity of the hot-swap base with the through hole of the printed circuit board and the perpendicularity of the hot-swap base with the surface of the printed circuit board are ensured.
6. The electronic component hot-swap device according to claim 5, characterized in that, The length of the limiting rod exceeds the sum of the thickness of the printed circuit board, the thickness of the solder pad, and the length of the hot-swappable base.