Dual-purpose PCBA board with breakable edge connection area

Abstract

The utility model discloses a kind of dual-purpose PCBA board with breakable edge wiring area, it includes circuit board, sensor probe wire harness access area is equipped at the edge of one side of circuit board, sensor probe wire harness access area is opened in sensor probe wire harness access hole, first access area and second access area for vehicle body wire harness access are separately equipped at the edge of another opposite side of circuit board, first access area is more close to the outside of circuit board than second access area and tear structure for facilitating breaking off first access area from circuit board is equipped between the two, first access hole and second access hole are respectively equipped in first access area and second access area, sensor measurement circuit is printed on circuit board, first access hole and second access hole are connected in parallel into sensor measurement circuit.The PCBA board can be used for two purposes, can be used for large and small car's particulate matter sensor simultaneously, avoid producing two different specifications PCBA board, when replacing, also need not consider the problem of adaptive selection type.

Description

Technical Field

[0001] This utility model relates to the technical field of PCBA circuit boards for particulate matter sensors, and specifically to a dual-purpose PCBA board with a removable edge wiring area. Background Technology

[0002] Automotive particulate matter sensors are used to detect the content of fine particles in vehicle exhaust. They can monitor the concentration of PM2.5, PM10, and other particulate matter in vehicle exhaust in real time, ensuring that the vehicle meets the corresponding environmental emission standards. An automotive particulate matter sensor generally includes a housing structure, a connector structure, and a PCBA board housed within the housing. The PCBA board has body wiring harness access holes and sensor probe wiring harness access holes. The connector structure includes a protruding interface and connecting pins located within the interface. The connecting pins are inserted into the corresponding body wiring harness access holes or sensor probe wiring harness access holes on the PCBA board and secured with solder. The interface is used to connect the body wiring harness or sensor probe wiring harness.

[0003] Currently, the dimensions of particulate matter sensors used in large vehicles (trucks, buses, etc.) are generally significantly larger than their counterparts used in smaller vehicles (sedans, SUVs, etc.). Specifically, the internal cavity dimensions of the housing for most particulate matter sensors in large vehicles are approximately 55×82mm, while the corresponding dimensions for particulate matter sensors in smaller vehicles are approximately 52×47mm. Therefore, the dimensions of the PCBA boards inside the two types of particulate matter sensors are also significantly different. Since two types of PCBAs are sold on the market, it is inconvenient to select the correct type when replacing the PCBA board for a particulate matter sensor. Furthermore, manufacturers need two different sets of equipment to produce both types of PCBA boards, resulting in higher costs. Utility Model Content

[0004] This invention provides a dual-purpose PCBA board with a removable edge wiring area, designed to be used in both large and small vehicles, overcoming the aforementioned shortcomings of the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A dual-purpose PCBA board with a removable edge wiring area, comprising a circuit board, wherein the circuit board has a sensor probe harness access area near one edge, and a sensor probe harness access hole is provided in the sensor probe harness access area; the circuit board has a first access area and a second access area for vehicle body harness access at intervals near the opposite edge, wherein the first access area is closer to the outside of the circuit board than the second access area, and an easy-tear structure is provided between the first access area and the second access area to facilitate the removal of the first access area from the circuit board; the first access area and the second access area are respectively provided with a first access hole and a second access hole; a sensor measurement circuit is printed on the circuit board, and the first access hole and the second access hole are connected in parallel to the sensor measurement circuit.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the circuit board includes a motherboard and an ear plate protruding outward on one side of the motherboard. The first access area is disposed on the ear plate, and the second access area is disposed on the edge of the motherboard and close to the ear plate. The easy-tear structure is provided between the motherboard and the ear plate.

[0008] Furthermore, both the mother plate and the ear plate are rectangular plates. The ear plate is located on the long side of the mother plate, and the length of the ear plate is 0.25-1 times the length of the long side of the mother plate. The width of the ear plate is 0.2-0.4 times its length.

[0009] Furthermore, the mother plate has a size of 52mm × 47mm, and the ear plate has a length of 15-25mm and a width of 5-10mm.

[0010] Furthermore, the easy-tear structure is a stamp hole formed by half-cutting or continuous perforation.

[0011] Furthermore, the circuit board is also provided with mounting holes to facilitate fixing it inside the sensor housing.

[0012] Furthermore, a foolproof notch is provided at one corner of the circuit board.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The dual-purpose PCBA board provided by this utility model has an edge wiring area (first access area) that can be removed along an easy-tear structure. When the edge wiring area is not removed, the overall width is relatively large, allowing it to be installed in the housing of a particulate matter sensor for use in large vehicles. However, when it needs to be installed in the housing of a particulate matter sensor for use in small vehicles, the edge wiring area can be removed first to reduce the width before installation. This dual-purpose PCBA board can be used for both large and small vehicles, thus avoiding the need to produce two different specifications of PCBA boards, and eliminating the need to consider compatibility selection issues when replacing them. Attached Figure Description

[0015] Figure 1 A schematic diagram of a dual-purpose PCBA board with a removable edge wiring area provided by this utility model;

[0016] Figure 2 A schematic diagram of another dual-purpose PCBA board with a removable edge wiring area provided by this utility model (the length of the ear plate is about one-third of the length of the corresponding side of the mother board).

[0017] The attached diagram lists the components represented by each number as follows:

[0018] 1. Sensor probe harness access area; 2. Sensor probe harness access hole; 3. First access area; 4. Second access area; 5. First access hole; 6. Second access hole; 7. Mother plate; 8. Ear plate; 9. Stamp hole; 10. Fixing hole; 11. Foolproof notch. Detailed Implementation

[0019] The technical solution provided by this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. 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.

[0020] In the description of this utility model, if terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", and "outer" are used to indicate the orientation or positional relationship, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figures 1 to 2As shown, this utility model provides a dual-purpose PCBA board with a removable edge wiring area, which includes a circuit board. The circuit board has a sensor probe harness access area 1 near one edge, and a sensor probe harness access hole 2 is provided in the sensor probe harness access area 1. The circuit board has a first access area 3 and a second access area 4 for vehicle body harness access at intervals near the opposite edge. The first access area 3 is closer to the outer side of the circuit board than the second access area 4, and an easy-tear structure is provided between the first access area 3 and the second access area 4 to facilitate the removal of the first access area 3 from the circuit board. The first access area 3 and the second access area 4 are respectively provided with a first access hole 5 and a second access hole 6. A sensor measurement circuit is printed on the circuit board, and the first access hole 5 and the second access hole 6 are connected in parallel to the sensor measurement circuit.

[0022] It should be noted that the sensor measurement circuit of this PCBA board integrates all the necessary electrical components. Figure 1 and Figure 2 Not shown in the diagram. When used in large vehicles, the body wiring harness is connected to the first access hole in the first access area and secured with solder. When used in small vehicles, the first access area is first removed along the tear-off structure, and then the body wiring harness is connected to the second access hole in the second access area and secured with solder. After removing the first access area, the exposed copper and other conductor ends on the cross-section will not adversely affect the function of the PCBA board because the housing is made of insulating material, and the exposed conductor ends abut against the inner wall of the housing, preventing short circuits.

[0023] In one embodiment of the present invention, the circuit board includes a mother plate 7 and an ear plate 8 protruding outward on one side of the mother plate 7. The first access area 3 is disposed on the ear plate 8, and the second access area 4 is disposed on the edge of the mother plate 7 and close to the ear plate 8. The easy-tear structure is provided between the mother plate 7 and the ear plate 8.

[0024] It is understandable that the mother plate and the ear plate are usually coplanar and of the same thickness. In essence, they are generally different areas of the same plate, separated by an easy-tear structure.

[0025] In one embodiment of this utility model, both the mother plate 7 and the ear plate 8 are rectangular plates. The ear plate 8 is disposed on the long side of the mother plate 7. The length of the ear plate 8 is 0.25-1 times the length of the long side of the mother plate 7, and the width of the ear plate 8 is 0.2-0.4 times its length.

[0026] It is understandable that the rectangular plate referred to here means that when viewed as a whole and ignoring the rounded corners or gaps in the local areas, it appears rectangular. Figure 1 The length of the ear plate in the PCBA board is approximately one-third of the length of the long side of the motherboard. Figure 2 The length of the ear plate in the PCBA board is approximately equal to the length of the long side of the mother board.

[0027] In one embodiment of this utility model, the mother plate 7 has a size of 52mm×47mm, and the ear plate 8 has a length of 15-25mm and a width of 5-10mm.

[0028] Specifically, for small vehicles, after removing the ear plate, the motherboard dimensions are 52mm × 47mm. The ear plate is mounted on the 52mm wide side of the motherboard, and its width is preferably 8mm. For large vehicles, considering the width of the ear plate, the minimum installation space required for the entire PCBA board is 52 × 55mm. Commercially available particulate matter sensors generally have two housing sizes: 52mm × 47mm for small vehicles and 55mm × 82mm for large vehicles. The PCBA board with the ear plate perfectly matches the 55mm width of the particulate matter sensor housing for large vehicles.

[0029] In one embodiment of this utility model, the easy-tear structure is a stamp hole 9 that is half-cut or continuously perforated.

[0030] Understandably, the structure of half-cut or continuously spaced perforated lines (dotted lines and teeth) is an easy-tear line, and when forcefully pried, the ear plate can be easily removed along the easy-tear line.

[0031] In one embodiment of this utility model, the circuit board is further provided with fixing holes 10 to facilitate fixing it in the sensor housing.

[0032] Understandably, there are usually at least two mounting holes, arranged diagonally.

[0033] In one embodiment of the present invention, a foolproof notch 11 is provided at one corner of the circuit board.

[0034] It should be noted that the foolproof notch ensures that the PCBA board can be quickly positioned and aligned during installation, making installation faster.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-purpose PCBA board with a removable edge wiring area, characterized in that, The circuit board includes a sensor probe harness access area (1) near one edge, a sensor probe harness access hole (2) is provided in the sensor probe harness access area (1), and a first access area (3) and a second access area (4) for vehicle body harness access are provided at intervals near the opposite edge of the circuit board. The first access area (3) is closer to the outside of the circuit board than the second access area (4), and an easy-tear structure is provided between the first access area (3) and the second access area (4) to facilitate the removal of the first access area (3) from the circuit board. The first access area (3) and the second access area (4) are respectively provided with a first access hole (5) and a second access hole (6). A sensor measurement circuit is printed on the circuit board, and the first access hole (5) and the second access hole (6) are connected in parallel to the sensor measurement circuit.

2. A dual-purpose PCBA board with a removable edge wiring area according to claim 1, characterized in that, The circuit board includes a motherboard (7) and an ear plate (8) protruding outward on one side of the motherboard (7). The first access area (3) is provided on the ear plate (8), and the second access area (4) is provided on the edge of the motherboard (7) and close to the ear plate (8). The easy-tear structure is provided between the motherboard (7) and the ear plate (8).

3. A dual-purpose PCBA board with a removable edge wiring area according to claim 2, characterized in that, Both the mother plate (7) and the ear plate (8) are rectangular plates. The ear plate (8) is located on the wide side of the mother plate (7). The length of the ear plate (8) is 0.25-1 times the length of the wide side of the mother plate (7), and the width of the ear plate (8) is 0.2-0.4 times its length.

4. A dual-purpose PCBA board with a removable edge wiring area according to claim 3, characterized in that, The mother plate (7) has a size of 52mm×47mm, and the ear plate (8) has a length of 15-25mm and a width of 5-10mm.

5. A dual-purpose PCBA board with a removable edge wiring area according to claim 1, characterized in that, The tear-off structure is a stamp hole (9) that is half-cut or continuously perforated.

6. A dual-purpose PCBA board with a removable edge wiring area according to claim 1, characterized in that, The circuit board is also provided with fixing holes (10) to facilitate fixing it inside the sensor housing.

7. A dual-purpose PCBA board with a removable edge wiring area according to any one of claims 1 to 6, characterized in that, The circuit board has a foolproof notch (11) at one corner.

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