Circuit board assembly and electronic device

Abstract

The utility model provides a kind of circuit board assembly and electronic equipment, the circuit board assembly is stacked first circuit board and second circuit board, without increasing physical size, the number of connectable external equipment can be expanded.And, through the cooperation of graphic mark and positioning structure, it can play the role of preventing stupid in installation guiding process, effectively reduce the probability of installation error in stacking process, improve assembly efficiency.The circuit board assembly does not need to increase additional positioning column, screw and other hardware, only using silk printing and milling process in PCB manufacturing can be realized, without increasing or very little increasing material cost, with the advantages of low cost and reliable.

Description

Technical Field

[0001] This utility model relates to the field of PCB technology, and in particular to a circuit board assembly and electronic device. Background Technology

[0002] In traditional embedded signal acquisition system design, a single-board integration scheme is usually adopted, that is, a microcontroller (microcontroller) and all its peripheral signal acquisition circuits are integrated on a single circuit board.

[0003] In the process of realizing this utility model, the inventors discovered that the prior art has at least the following problems: However, single-board integration solutions cannot meet the needs when faced with limitations in physical size, insufficient microcontroller port resources, and the requirements for functional modularization and reuse. Stacking multiple circuit boards is one way to solve this problem. When stacking multiple circuit boards, ensuring reliable connections and error prevention between them becomes a critical issue that needs to be addressed. Utility Model Content

[0004] In view of this, the present invention provides a circuit board assembly and an electronic device that can expand the number of ports that can be connected to external devices by stacking circuit boards, and reduce the probability of installation errors during the stacking process.

[0005] This utility model provides a circuit board assembly, including: A first circuit board, wherein a first connector and a first graphic mark are provided on a first side; A second circuit board is stacked on top of the first circuit board, and a second connector that mates with the first connector is provided on the second side of the second circuit board; a first positioning structure is provided on the edge of the second circuit board. When the first connector is configured to mate with the second connector, the outline of the first positioning structure is aligned with or nested with the edge of the first graphic mark.

[0006] In one embodiment, at least two of the first connectors and the first graphic mark are provided on the first side of the first circuit board.

[0007] In one embodiment, the first connector and the first graphic mark are respectively provided on opposite sides of the first surface of the first circuit board; The first positioning structure is provided on opposite sides of the second circuit board, and the second connector is provided on opposite sides of the second surface of the second circuit board.

[0008] In one embodiment, a third connector is provided on both sides of the first side of the second circuit board, wherein the third connector on one side includes an unconnected terminal, and the unconnected terminal is directly connected to the corresponding terminal in the second connector through a trace inside the second circuit board.

[0009] In one embodiment, a third circuit board is also included, stacked on top of the second circuit board, and a fourth connector is provided on the second side of the third circuit board for mating with the third connector of the second circuit board.

[0010] In one embodiment, the edge of the third circuit board is provided with a second positioning structure; When the fourth connector mates with the third connector, the outline of the second positioning structure is aligned with or nested with the edge of the first graphic mark.

[0011] In one embodiment, the second connector of the second circuit board and the third connector are the same; The structure of the third circuit board is the same as that of the second circuit board.

[0012] In one embodiment, each of the first graphic marks on the first circuit board is a symmetrical or asymmetrical shape and is positioned in a staggered manner.

[0013] In one embodiment, the circuit board assembly includes at least two second circuit boards stacked on top of the first circuit board; the first positioning structure is provided on one edge of one side of the second circuit board.

[0014] A second aspect of this application also provides an electronic device including the circuit board assembly described in the above embodiments.

[0015] The circuit board assembly and electronic device provided by this utility model can expand the number of ports that can be connected to external devices without increasing the physical size by stacking the first and second circuit boards. Furthermore, the combination of graphic markings and positioning structures can prevent mistake-proofing during installation, effectively reducing the probability of installation errors during stacking and improving assembly efficiency. This circuit board assembly requires no additional positioning posts, screws, or other hardware; it can be achieved using only the inherent silkscreen and milling processes in PCB manufacturing, increasing material costs by little or no, and offering advantages of low cost and reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the circuit board assembly in one embodiment.

[0017] Figure 2 This is a schematic diagram of the structure of the first circuit board in one embodiment.

[0018] Figure 3This is a schematic diagram of the structure of the second circuit board in one embodiment.

[0019] Figure 4 This is a schematic diagram of the circuit board assembly in another embodiment.

[0020] Figure 5 This is a schematic diagram of the signal flow of a circuit board assembly in one embodiment.

[0021] Figure 6 This is a schematic diagram of the signal flow of the first circuit board in one embodiment.

[0022] Figure 7 This is a schematic diagram of the signal flow of the second circuit board in one embodiment. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, inside, outside, top, bottom, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0025] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, the component may be directly on the other component or there may be an intervening component present. When a component is referred to as "connected to" another component, it may be directly connected to the other component or there may be an intervening component present.

[0026] This application also provides a circuit board assembly, such as Figures 1 to 3 As shown, it includes: A first circuit board 100 has a first connector 11 and a first graphic mark 12 on its first side. The first graphic mark 12 is located in the vicinity of the first connector 11 and is used to indicate the assembly position of a second circuit board 200 stacked on the first circuit board 100.

[0027] A second circuit board 200 is stacked on top of the first circuit board 100. A second connector (not shown) is provided on the second side of the second circuit board 200 to mate with the first connector 11. The first side of the first circuit board 100 and the second side of the second circuit board 200 are positioned opposite each other. The second circuit board 200 is stacked on top of the first circuit board 100 through the mating of the first connector 11 and the second connector. A first positioning structure 22 is provided on the edge of the second circuit board 200. The shape and position of the first positioning structure 22 are configured such that when the first connector 11 mates with the second connector, the outline of the first positioning structure 22 is aligned with or nested within the edge of the first graphic mark 12.

[0028] In one embodiment, the first surface of the first circuit board 100, i.e., the upper surface of the first circuit board 100, is a first graphic mark 12 formed on the upper surface of the first circuit board 100 by means of silkscreen printing, laser engraving, or labeling.

[0029] The second connector is located on the second side of the second circuit board 200, that is, the lower surface of the second circuit board 200. The position and shape of the first graphic mark 12 correspond to the first positioning structure 22 of the second circuit board 200, and are used to indicate that the second connector of the second circuit board 200 mates with the first connector 11 of the first circuit board 100, thereby realizing the stacking of the second circuit board 200 on the first circuit board 100.

[0030] In one embodiment, the first connector 11 can be a male connector, and the second connector can be a female connector. For example, the first connector 11 of the first circuit board 100 can be a pin, and the second connector of the second circuit board can be a female connector. A first graphic mark 12 is printed near the first connector 11 of the first circuit board 100. On the edge of the second circuit board 200 on the side where the second connector is located, a first positioning structure 22 matching the first graphic mark 12 is formed. The operator only needs to align the first positioning structure 22 of the second circuit board 200 with the first graphic mark 12 on the first circuit board 100 and then press it down. The pin can then be accurately inserted into the female connector, completing the connection and stacking the second circuit board 200 on top of the first circuit board 100.

[0031] This circuit board assembly expands the number of external devices that can be connected without increasing physical dimensions by stacking the first circuit board 100 and the second circuit board 200. Furthermore, the combination of graphic markings and positioning structures helps prevent mistake-proofing during installation, effectively reducing the probability of installation errors during stacking and improving assembly efficiency. This circuit board assembly requires no additional positioning posts, screws, or other hardware; it can be achieved solely through silkscreen and milling processes in PCB manufacturing, increasing material costs little to no, offering advantages of low cost and reliability.

[0032] In one embodiment, at least two first connectors 11 and first graphic marks 12 are provided on the first surface of the first circuit board 100. For example, the first connectors 11 and first graphic marks 12 can be provided on all four sides, any two sides, or any three sides of the first surface of the first circuit board, or the first connectors 11 and first graphic marks 12 can be provided in two or more different areas of the first surface of the first circuit board, so that a physical structure capable of stacking multiple second circuit boards 200 can be formed on the first circuit board 100. In this way, at least two circuit boards can be stacked in the planar direction of the first circuit board 100, or multiple circuit boards can be stacked in the vertical direction of the first circuit board 100, to meet the needs of practical applications.

[0033] In one embodiment, a first connector 11 and a first graphic mark 12 are respectively provided on opposite sides of the first surface of the first circuit board 100. A first positioning structure 22 is respectively provided on opposite sides of the second circuit board 200, and a second connector is respectively provided on opposite sides of the second surface of the second circuit board 200.

[0034] By providing a first connector 11 and a first graphic mark 12 on opposite sides of the first surface of the first circuit board 100, two second circuit boards 200 can be stacked symmetrically in space, and more circuit boards can be stacked in the vertical direction of the first circuit board 100.

[0035] In one embodiment, a third connector 23 is provided on both sides of the first surface, i.e. the upper surface, of the second circuit board 200. One of the third connectors 23 includes an unconnected terminal, which is directly connected to the corresponding terminal in the second connector through the internal wiring of the second circuit board 200.

[0036] The third connector 23 on the side of the second circuit board 200 that does not include the unused terminals can be used as an expansion port to acquire external signals. Conversely, the third connector 23 on the side of the second circuit board 200 that includes the unused terminals can provide a physical structure for further stacking of circuit boards on top of the second circuit board 200, thereby allowing at least two circuit boards to be stacked in the vertical direction of the first circuit board 100.

[0037] Furthermore, the unconnected terminal of the third connector 23 is directly connected to the corresponding terminal in the second connector through internal wiring of the second circuit board 200. This allows signals collected by the stacked circuit boards on the second circuit board 200 to be directly transmitted to the first circuit board 100 via internal wiring, without being processed or converted by the chip in the second circuit board 200. This shortens the signal connection path and reduces signal attenuation and delay.

[0038] In one embodiment, the circuit board assembly further includes a third circuit board 300 stacked on top of the second circuit board 200, and the second side, i.e. the lower surface, of the third circuit board 300 is provided with a fourth connector (not shown) that mates with the third connector 23 of the second circuit board 200.

[0039] In this embodiment, the third circuit board 300 can be connected to the third connector 23 on the upper surface of the second circuit board 200 via the fourth connector on the lower surface, thereby stacking the third circuit board 300 on the second circuit board 200. In this way, two circuit boards can be stacked in the vertical direction of the first circuit board 100, thereby expanding the number of ports that can be connected to external devices as needed, effectively solving the bottleneck of single board size.

[0040] In one embodiment, the edge of the third circuit board 300 is provided with a second positioning structure 31. When the fourth connector of the third circuit board 300 mates with the third connector 23 of the second circuit board 200, the outline of the second positioning structure 31 is aligned with or nested with the edge of the first graphic mark 12.

[0041] It is understood that the first graphic mark 12, which matches the first positioning structure 22, is used to indicate the mounting position of the second connector of the second circuit board 200 and the first connector 11 of the first circuit board 100. The second circuit board 200 is stacked on top of the first circuit board 100 through the mating of the second connector and the first connector 11. Similarly, the first graphic mark 12, which matches the second positioning structure 31, is used to indicate the mounting position of the fourth connector of the third circuit board 300 and the third connector 23 of the second circuit board 200. The fourth connector and the third connector 23 are mated to achieve the stacking of the third circuit board 300 on top of the second circuit board 200. Thus, the combination of the graphic mark and the positioning structure serves to prevent mistake-proofing during installation, effectively reducing the probability of installation errors during stacking and improving assembly efficiency.

[0042] In one embodiment, the second and third connectors of the second circuit board 200 are identical, such as both being female connectors, thus enabling the reuse of the second circuit board and preventing incorrect stacking. In this case, the third circuit board 300 can adopt the same structure as the second circuit board 200, thereby meeting the requirements of functional template-based design and reuse, and reducing cost and complexity. For example, a universal board can be provided, in which a first positioning structure 22 and a second positioning structure 31 are respectively provided on opposite sides, and the connectors on the upper and lower surfaces are identical.

[0043] A general-purpose board, serving as a second circuit board 200, is stacked on top of the first circuit board 100. Another general-purpose board, serving as a third circuit board 300, is stacked on top of the second circuit board 200. For ease of description, the connector on the lower surface of the second circuit board 200 is referred to as the second connector, and the connector on the upper surface is referred to as the third connector 23. The connector on the lower surface of the third circuit board 300 is referred to as the fourth connector, and the connector on the lower surface is referred to as the fifth connector.

[0044] The second circuit board 200 is stacked on top of the first circuit board 100 by mates the second connector on the lower surface of the second circuit board 200 with the first connector 11 of the first circuit board 100. Similarly, the third circuit board 300 is stacked on top of the second circuit board 200 by mates the second connector on the lower surface of the third circuit board 300 with the third connector 23 on the upper surface of the second circuit board 200. Furthermore, the fifth connector on the upper surface of the third circuit board 300 provides the physical structure for continuing to stack more circuit boards upwards. Thus, by utilizing reusable, universal boards, circuit boards can be continuously stacked upwards as needed to increase system functionality, I / O ports, or processing capabilities.

[0045] Similarly, the fifth connector on the upper surface of the third circuit board 300 includes terminals that provide signal access. The fifth connector on the side with the unconnected terminal enables direct signal connection between stacked circuit boards. The unconnected terminal is directly connected through the internal traces of the third circuit board 300 and the second circuit board 200. This allows signals from the stacked circuit boards on the third circuit board 300 to enter the third circuit board 300 without being processed or transferred by the chip in the third circuit board 300. Instead, they are connected to the unconnected terminal of the fifth connector of the third circuit board 300 through internal traces. The unconnected terminal of the third connector of the second circuit board 200 is directly transmitted to the first circuit board 100. In this way, the signal connection path can be shortened, and signal attenuation and delay can be reduced.

[0046] In one embodiment, each of the first graphic markings 12 on the first circuit board 100 may adopt a symmetrical shape, such as a symmetrical semicircle, or an asymmetrical shape, such as a right-angled L-shape, a semicircle with a notch, etc. Furthermore, the first graphic markings 12 on opposite sides of the first circuit board are staggered in position.

[0047] Correspondingly, the positioning structures on both sides of the universal board adopt a shape that matches the first graphic mark and are staggered in position. Thus, by setting the first graphic mark in an asymmetrical position, such as the first graphic marks on both sides being on different axes, the possibility of the circuit board being rotated 180 degrees or incorrectly shifted to a slot position for installation can be physically eliminated. The connector can only be installed when all the first graphic marks and positioning structures are perfectly aligned, ensuring the unique correctness of the assembly. This makes the assembly process fast and accurate, virtually eliminating the time spent on repeated attempts and error correction. This significantly improves production efficiency and first-pass yield. Furthermore, the asymmetrical shape of the first graphic mark can further effectively prevent the reused universal board from being installed in the wrong direction (such as by 180-degree rotation).

[0048] In one embodiment, such as Figure 4 As shown, the circuit board assembly includes at least two second circuit boards 200 stacked on top of the first circuit board; a first positioning structure 22 is provided on one edge of the second circuit board 200.

[0049] The first circuit board 100 has at least two first connectors and a first graphic mark 12 on its first surface. The first graphic mark 12 indicates the mounting positions of multiple second circuit boards 200 on the first circuit board 100. This allows at least two circuit boards to be stacked in the planar direction of the first circuit board 100. Since multiple circuit boards are stacked in the planar direction of the first circuit board, they can be quickly assembled by matching the graphic marks and positioning structures, reducing the probability of errors.

[0050] Taking a stack of three circuit boards as an example, the general-purpose board has a first positioning structure 22 and a second positioning structure 31 on opposite sides, respectively. The first positioning structure 22 and the second positioning structure 31 match the shape and position of the first graphic mark 12 of the first circuit board 100. For example, each of the first graphic marks of the first circuit board 100 can adopt a symmetrical shape, and the first graphic marks 12 on opposite sides of the first circuit board 100 are staggered in position. Then, the first positioning structure 22 and the second positioning structure 31 of the general-purpose board adopt the same shape as the first graphic mark 12, and are staggered in position on both sides of the general-purpose board.

[0051] A general-purpose board, serving as a second circuit board 200, is stacked on top of the first circuit board 100. Another general-purpose board, serving as a third circuit board 300, is stacked on top of the second circuit board 200. For ease of description, the connector on the lower surface of the second circuit board 200 is referred to as the second connector, and the connector on the upper surface is referred to as the third connector 23. The connector on the lower surface of the third circuit board 300 is referred to as the fourth connector, and the connector on the lower surface is referred to as the fifth connector.

[0052] like Figures 1 to 7 As shown, a first connector 11 and a first graphic mark 12 are respectively provided on opposite sides of the first circuit board 100. The second circuit board 200 is stacked on top of the first circuit board 100 by mating the second connector with the first connector 11. The third circuit board 300 is rotated 180 degrees relative to the second circuit board 200, and the fourth connector of the third circuit board 300 is mated with the third connector of the second circuit board 200 to achieve the stacking of the third circuit board 300 on top of the second circuit board 200.

[0053] For ease of explanation, the first connector 11 on the first side of the first circuit board 100 has terminals 8 and 9, and the first connector 11 on the second side has terminals 5 and 6. The first circuit board 100 also has terminals 7 and 10 for receiving external transmission signals, with terminal 7 connected to terminal 5 and terminal 10 connected to terminal 9.

[0054] The third connector 23 on the first side of the second circuit board 200 has terminals 1 and 2, which are unconnected terminals. The third connector 23 on the second side has terminals 3 and 4. When stacked, terminal 3 of the second circuit board 200 is connected to terminal 9 of the first circuit board 100, and terminal 4 of the second circuit board 200 is connected to terminal 8 of the first circuit board 100.

[0055] Terminal 4 on the fifth connector of the third circuit board 300 is connected to terminal 6 on the first circuit board 100 through unconnected terminal 1 on the second circuit board 200, and terminal 3 on the fifth connector of the third circuit board 300 is connected to terminal 5 on the first circuit board through unconnected terminal 2.

[0056] When the first circuit board 100 receives an external signal, it transmits the signal to terminals 5 and 9. Terminal 5 transmits the signal to terminal 3 of the third circuit board 300, and terminal 9 transmits the signal to terminal 3 of the second circuit board 200. Simultaneously, the first circuit board 100 generates an analog signal, which is transmitted through terminal 6 of the first circuit board 100 to terminal 4 of the third circuit board and terminal 4 of the second circuit board 200. This allows the second circuit board 200 and the third circuit board 300 to know which signals have been received. After processing the signals, the second circuit board 200 and the third circuit board 300 communicate with the first circuit board 100 to transmit information.

[0057] Terminals 3 and 4 on the third circuit board 300 and the second circuit board 200 are used to receive signals. Terminal 3 is used to transmit the signal sent from the first circuit board 100 to the MCU, and terminal 4 transmits the signal processed by the MCU back to the first circuit board 100.

[0058] The circuit board assembly of this application cleverly enables a single board to expand the functions of the same circuit board by matching graphical markings with positioning structures and staggering the graphical markings. It can also be extended to various types of circuit boards, allowing this type of single-function circuit board to achieve more functions with a single board, thus saving development time.

[0059] An electronic device is provided, comprising the circuit board assembly described in the above embodiments. The electronic device and the circuit board assembly provided in this application can achieve the same technical effects, and will not be repeated here.

[0060] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A circuit board assembly, characterized in that, include: A first circuit board, wherein a first connector and a first graphic mark are provided on a first side; A second circuit board is stacked on top of the first circuit board, and a second connector that mates with the first connector is provided on the second side of the second circuit board; a first positioning structure is provided on the edge of the second circuit board. When the first connector is configured to mate with the second connector, the outline of the first positioning structure is aligned with or nested with the edge of the first graphic mark.

2. The circuit board assembly according to claim 1, characterized in that, At least two of the first connectors and the first graphic mark are provided on the first side of the first circuit board.

3. The circuit board assembly according to claim 2, characterized in that, The first connector and the first graphic mark are respectively provided on opposite sides of the first surface of the first circuit board; The first positioning structure is provided on opposite sides of the second circuit board, and the second connector is provided on opposite sides of the second surface of the second circuit board.

4. The circuit board assembly according to claim 2, characterized in that, The second circuit board has a third connector on each of its two sides on the first side. One of the third connectors includes an empty terminal, which is directly connected to the corresponding terminal in the second connector through a trace inside the second circuit board.

5. The circuit board assembly according to claim 4, characterized in that, It also includes a third circuit board stacked on top of the second circuit board, the second side of which is provided with a fourth connector that mates with the third connector of the second circuit board.

6. The circuit board assembly according to claim 5, characterized in that, The edge of the third circuit board is provided with a second positioning structure; When the fourth connector mates with the third connector, the outline of the second positioning structure is aligned with or nested with the edge of the first graphic mark.

7. The circuit board assembly according to claim 5, characterized in that, The second connector on the second circuit board is the same as the third connector; The structure of the third circuit board is the same as that of the second circuit board.

8. The circuit board assembly according to any one of claims 2 to 7, characterized in that, Each of the first graphical marks on the first circuit board is a symmetrical or asymmetrical shape and is positioned in a staggered manner.

9. The circuit board assembly according to claim 2, characterized in that, The circuit board assembly includes at least two second circuit boards stacked on top of the first circuit board; the first positioning structure is provided on one edge of one side of the second circuit board.

10. An electronic device, characterized in that, Includes the circuit board assembly as described in any one of claims 1 to 9.

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