A PCBA stack-up assembly structure
By inserting electronic component pins into sockets and soldering them, combined with differentiated socket design and support structure, the problems of high PCBA stack-up assembly cost and large space occupation are solved, and compact PCBA stack-up assembly is achieved.
Patent Information
- Application Number
- CN202522442424.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-18
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-18
AI Technical Summary
Existing PCBA stack-up assembly methods are costly and space-consuming, and conventional methods require the use of a lot of materials and cables for connection.
The pins of electronic components are inserted into the sockets of the first and second printed circuit boards and electrically connected by soldering, eliminating the need for cables and studs. Differentiated socket structures are designed to accommodate pin offsets, and support structures and snap-fit components are combined to improve stability.
It reduces material costs, saves space, and achieves a compact PCBA stack-up assembly structure.
Smart Images
Figure CN224947774U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of PCBA assembly technology, and in particular to a PCBA stacked assembly structure. Background Technology
[0002] With the continuous increase in power density of electronic products and the urgent need to reduce costs, the application of compact designs for printed circuit board assemblies (PCBAs) is expanding.
[0003] PCBA stack-up assembly is a good way to improve space utilization and effectively reduce the overall size of the device. The conventional approach is to fix the PCBs together with studs and screws and make electrical connections with cables. This method not only requires more materials, resulting in higher costs, but also occupies more space. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a PCBA stacked assembly structure, which aims to solve the problems of high cost and large space occupation.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a PCBA stacked assembly structure, including a first printed circuit board, a second printed circuit board, and at least one electronic component. The first printed circuit board and the second printed circuit board are arranged overlappingly and spaced apart. The first printed circuit board has a first through hole through its thickness direction, and the second printed circuit board has a second through hole through its thickness direction. The second through hole corresponds to the position of the first through hole. The electronic component has at least one pin, which is sequentially inserted into the first through hole and the second through hole and soldered into the first through hole and the second through hole.
[0006] Furthermore, the cross-sectional area of the first socket is larger than the cross-sectional area of the pin, and smaller than the cross-sectional area of the second socket.
[0007] Furthermore, the second socket includes an upper segment and a lower segment, the upper segment being arranged close to the first socket, and the cross-sectional area of the upper port of the upper segment being larger than the cross-sectional area of the lower port of the upper segment.
[0008] Furthermore, the upper hole section has a tapered structure that is wider at the top and narrower at the bottom, and the cross-sectional area of the lower hole section is the same as the cross-sectional area of the lower end of the upper hole section.
[0009] Furthermore, it also includes a support structure disposed between the first printed circuit board and the second printed circuit board.
[0010] Furthermore, the support structure includes a pad, the pad having a first end face and a second end face arranged opposite to each other, the first end face of the pad being connected to the bottom of the first printed circuit board, and the second end face of the pad being connected to the top of the second printed circuit board.
[0011] Furthermore, a first auxiliary fixing member is provided between the first end face of the pad and the connection part of the first printed circuit board, and the first end face of the pad is fixedly connected to the first printed circuit board through the first auxiliary fixing member. A second auxiliary fixing member is provided between the second end face of the pad and the connection part of the second printed circuit board, and the second end face of the pad is fixedly connected to the second printed circuit board through the second auxiliary fixing member.
[0012] Furthermore, both the first auxiliary fastener and the second auxiliary fastener are adhesive colloids.
[0013] Furthermore, the support structure includes a columnar member, with a first snap-fit portion and a second snap-fit portion respectively provided at the upper and lower ends of the columnar member. The first printed circuit board is provided with a first snap-fit hole that mates with the first snap-fit portion, and the second printed circuit board is provided with a second snap-fit hole that mates with the second snap-fit portion. The first snap-fit portion is secured in the first snap-fit hole, and the second snap-fit portion is secured in the second snap-fit hole.
[0014] Furthermore, the cross-section of the cylindrical member is larger than the cross-sections of the first snap-fit hole and the second snap-fit hole.
[0015] The advantages of this invention compared to existing technologies are as follows: A PCBA stack-up assembly structure includes a first printed circuit board, a second printed circuit board, and at least one electronic component. The first and second printed circuit boards are arranged overlappingly and spaced apart. The first printed circuit board has a first through-hole along its thickness direction, and the second printed circuit board has a second through-hole along its thickness direction. The second through-hole corresponds to the position of the first through-hole. The electronic component has at least one pin, which is sequentially inserted into the first and second through-holes and soldered therein. This invention directly utilizes the pins of electronic components with specific functions to connect the first and second printed circuit boards and form an electrical connection, eliminating the need for cable connections and studs and screws for fixing. This significantly reduces material costs and saves space, making the PCBA stack-up assembly more compact.
[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objectives, features and advantages of this utility model more obvious and easy to understand, the following are preferred embodiments, which are described in detail below. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A front view of a PCBA stack-up assembly structure provided in a specific embodiment of this utility model; Figure 2 A side view of a PCBA stacked assembly structure provided in a specific embodiment of this utility model; Figure 3 A three-dimensional diagram of a PCBA stack-up assembly structure provided for a specific embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of the second insertion hole provided in a specific embodiment of the present utility model; Figure 5 A cross-sectional schematic diagram of the pins provided for a specific embodiment of this utility model; Figure 6 A cross-sectional schematic diagram of the first insertion hole provided for a specific embodiment of this utility model; Figure 7 A cross-sectional schematic diagram of the second insertion hole provided for a specific embodiment of this utility model; Figure 8 This is a schematic diagram of the installation of the cylindrical component provided in a specific embodiment of the present utility model.
[0019] Figure Labels 1. First printed circuit board; 11. First socket; 12. First snap-fit hole; 2. Second printed circuit board; 21. Second socket; 22. Second snap-fit hole; 3. Electronic component; 31. Pin; 4. Pad; 5. Cylindrical component; 51. First snap-fit part; 511. First embedding part; 512. First elastic arm; 52. Second snap-fit part; 521. Second embedding part; 522. Second elastic arm. Detailed Implementation
[0020] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0026] like Figures 1 to 8 As shown, this embodiment of the present invention provides a PCBA stack-up assembly structure, including a first printed circuit board, a second printed circuit board, and at least one electronic component. The electronic component is preferably a power device with rigid pins, such as a transistor or integrated circuit. The first and second printed circuit boards are arranged vertically parallel and spaced apart. The first printed circuit board has a first through-hole along its thickness direction, and the second printed circuit board has a second through-hole along its thickness direction. The second through-hole corresponds to the position of the first through-hole. The electronic component has at least one pin, which is sequentially inserted into the first and second through-holes. After assembly, the portions of the pins extending beyond the lower surfaces of the first and second through-holes are soldered to form solder joints. This soldering operation not only establishes an electrical path from the component to the first and second printed circuit boards, but also, through the mechanical strength of the solder joints and the rigidity of the pins, firmly fixes the first and second printed circuit boards together, forming a complete assembly unit.
[0027] It should be noted that if the second printed circuit board is relatively lightweight, and the number of pins connecting the first and second printed circuit boards is large, the second printed circuit board can be directly fixed by the pins.
[0028] By directly utilizing the pins of electronic components with specific functions to connect the first and second printed circuit boards and form an electrical connection, the use of cables and studs is eliminated, which greatly reduces material usage costs and saves space, making PCBA stack-up assembly more compact.
[0029] In some embodiments, in order to compensate for the cumulative positional error and slight misalignment that may occur after the pin passes through the first printed circuit board, and to ensure that the pin can be smoothly inserted into the second printed circuit board, the dimensions of the first socket and the second socket are designed differently.
[0030] Specifically, the cross-sectional area of the first socket is larger than that of the pin, but smaller than that of the second socket. In practical applications, the first socket is designed to be a standard size that closely matches the pin size of the electronic component, with its diameter slightly larger than the pin size to facilitate insertion while providing initial positioning and reducing pin offset. The second socket, on the other hand, is designed to be a larger, more spacious hole than the pin size, allowing the pin to pass through unimpeded even with some positional deviation or angular tilt, greatly improving assembly yield and efficiency. The shapes of the first and second sockets can be circular, rectangular, or preferably elongated (strip-shaped).
[0031] like Figures 5 to 7 In the embodiment shown, the electronic component is a T0247 power transistor with a pin cross-section of 1.4x0.8mm and a first-layer socket cross-section of 2.0x1.6mm; the second-layer socket cross-section is 2.4x1.6mm.
[0032] To facilitate the insertion of potentially misaligned pins into the second socket, the second socket comprises an upper segment and a lower segment. The upper segment is positioned closer to the first socket, and the cross-sectional area of its upper port is larger than that of its lower port. Thus, even if a pin is misaligned or slightly bent, the upper segment can apply a lateral force to the pin after it passes through the first socket, restoring it to a state that is essentially perpendicular to the second printed circuit board. This provides a degree of pin correction, making it easier for the pin to pass through the second printed circuit board. like Figure 4 In the illustrated embodiment, the upper hole segment has a tapered structure that is wider at the top and narrower at the bottom, and the cross-sectional area of the lower hole segment is the same as the cross-sectional area of the lower port of the upper hole segment. This design results in a larger upper port size for the tapered structure, forming a guide entrance; the lower port size converges to the same cross-sectional area as the lower hole segment, thus achieving a smooth geometric transition and further improving the success rate and efficiency of assembly. This design is particularly suitable for multi-pin electronic components.
[0033] It should be noted that a kit with the same shape as the conical structure can be fitted onto the upper hole section. This kit can be made of stainless steel, bakelite, synthetic stone, or other hard materials to improve the durability of this part.
[0034] In one embodiment, the PCBA stack-up assembly structure further includes a support structure disposed between the first printed circuit board and the second printed circuit board.
[0035] like Figure 1In the illustrated embodiment, the support structure includes a pad, which includes a first end face and a second end face arranged opposite to each other. The first end face of the pad is connected to the bottom of the first printed circuit board, and the second end face of the pad is connected to the top of the second printed circuit board.
[0036] The spacer can be a rigid or semi-rigid block, such as made of plastic or metal. It has two opposing and parallel first and second end faces, and its height determines the final spacing between the first and second printed circuit boards. The spacer serves as a spacer and support.
[0037] exist Figure 1 In the illustrated embodiment, a first auxiliary fixing member (not shown in the figure) is provided between the first end face of the pad and the connection portion of the first printed circuit board. The first end face of the pad is fixedly connected to the first printed circuit board through the first auxiliary fixing member. A second auxiliary fixing member (not shown in the figure) is provided between the second end face of the pad and the connection portion of the second printed circuit board. The second end face of the pad is fixedly connected to the second printed circuit board through the second auxiliary fixing member. Specifically, both the first and second auxiliary fixing members are adhesive materials, such as double-sided adhesive.
[0038] During assembly, first remove the protective layer of the double-sided adhesive that matches the size of the pad's end face. Then, accurately position and stick the pad with the double-sided adhesive to the bottom of the first printed circuit board and the top of the second printed circuit board. Note that, in order to avoid interference, the location of the double-sided adhesive should avoid the first and second sockets.
[0039] To improve the stability of the support, multiple pads can be selected and arranged as close as possible to the bottom of the first printed circuit board and the edge of the second printed circuit board.
[0040] By utilizing spacer blocks for interval support, combined with the first and second auxiliary fasteners, the problem of the second printed circuit board easily becoming loose or making abnormal noises under vibration, impact, or temperature changes is effectively prevented, thus improving the stability after connection.
[0041] like Figure 8 In the illustrated embodiment, the support structure includes a cylindrical member. The upper and lower ends of the cylindrical member are respectively provided with a first snap-fit portion and a second snap-fit portion. A first printed circuit board has a first snap-fit hole that mates with the first snap-fit portion, and a second printed circuit board has a second snap-fit hole that mates with the second snap-fit portion. The first snap-fit portion is secured in the first snap-fit hole, and the second snap-fit portion is secured in the second snap-fit hole. The cross-section of the cylindrical member is larger than the cross-section of the first and second snap-fit holes. This design not only allows for spaced support using the cylindrical member, but also provides a fixing function for the first and second snap-fit portions, ensuring stability after connection.
[0042] like Figure 8 In the illustrated embodiment, the first snap-fit portion includes a first insert portion and a first elastic arm, and the second snap-fit portion includes a second insert portion and a second elastic arm. During installation, the first insert portion is inserted into the first snap-fit hole. During insertion, the first elastic arm is squeezed by the hole wall of the first snap-fit hole. When the first elastic arm is completely inserted out of the first snap-fit hole, it returns to its original shape under its own elasticity. In this way, the upper end of the cylindrical member can be securely connected to the first printed circuit board. Similarly, the second insert portion is inserted into the second snap-fit hole. During insertion, the second elastic arm is squeezed by the hole wall of the second snap-fit hole. When the first elastic arm is completely inserted out of the second snap-fit hole, it returns to its original shape under its own elasticity. In this way, the lower end of the cylindrical member can be securely connected to the second printed circuit board.
[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A PCBA stack assembly structure, characterized in that, The device includes a first printed circuit board, a second printed circuit board, and at least one electronic component. The first and second printed circuit boards are arranged overlapping each other. The first printed circuit board has a first socket through it along its thickness direction, and the second printed circuit board has a second socket through it along its thickness direction. The second socket corresponds to the position of the first socket. The electronic component has at least one pin, which is inserted into the first socket and the second socket in sequence and soldered into the first socket and the second socket.
2. The PCBA stack-up assembly structure according to claim 1, characterized in that, The cross-sectional area of the first socket is larger than the cross-sectional area of the pin, and smaller than the cross-sectional area of the second socket.
3. The PCBA stack assembly structure of claim 1, wherein, The second socket includes an upper segment and a lower segment. The upper segment is arranged close to the first socket, and the cross-sectional area of the upper port of the upper segment is larger than the cross-sectional area of the lower port of the upper segment.
4. The PCBA stack-up assembly structure according to claim 3, characterized in that, The upper hole section has a tapered structure that is wider at the top and narrower at the bottom, and the cross-sectional area of the lower hole section is the same as the cross-sectional area of the lower end of the upper hole section.
5. A PCBA stack-up assembly structure according to any one of claims 1-4, characterized in that, It also includes a support structure disposed between the first printed circuit board and the second printed circuit board.
6. A PCBA stack-up assembly structure according to claim 5, characterized in that, The support structure includes a pad, which has a first end face and a second end face arranged opposite to each other. The first end face of the pad is connected to the bottom of the first printed circuit board, and the second end face of the pad is connected to the top of the second printed circuit board.
7. A PCBA stacked assembly structure according to claim 6, characterized in that, A first auxiliary fixing member is provided between the first end face of the pad and the connection part of the first printed circuit board, and the first end face of the pad is fixedly connected to the first printed circuit board through the first auxiliary fixing member. A second auxiliary fixing member is provided between the second end face of the pad and the connection part of the second printed circuit board, and the second end face of the pad is fixedly connected to the second printed circuit board through the second auxiliary fixing member.
8. A PCBA stack-up assembly structure according to claim 7, characterized in that, Both the first auxiliary fastener and the second auxiliary fastener are adhesive colloids.
9. A PCBA stack-up assembly structure according to claim 5, characterized in that, The support structure includes a columnar member, with a first snap-fit portion and a second snap-fit portion respectively provided at the upper and lower ends of the columnar member. The first printed circuit board is provided with a first snap-fit hole that mates with the first snap-fit portion, and the second printed circuit board is provided with a second snap-fit hole that mates with the second snap-fit portion. The first snap-fit portion is secured in the first snap-fit hole, and the second snap-fit portion is secured in the second snap-fit hole.
10. A PCBA stack-up assembly structure according to claim 9, characterized in that, The cross-section of the cylindrical member is larger than the cross-sections of the first snap-fit hole and the second snap-fit hole.