EMC filtering PCB

Abstract

The utility model discloses an EMC (Electro Magnetic Compatibility) filtering PCB (Printed Circuit Board), and relates to the technical field of PCBs. The PCB comprises a PCB main body, a magnetic ring and a mainboard matched with the PCB for use, the middle parts of two sides of the PCB main body are respectively provided with a groove for limiting the magnetic ring, and the upper end and the lower end of the PCB main body are respectively provided with an upper input end pin and a lower output end pin which are in circuit connection with wiring strips in the middle parts of the front side and the rear side of the PCB main body; the lower end of the PCB body is connected with a mainboard in an inserted mode through two lower output end pins, and first positioning holes for the lower output end pins to be connected in an inserted mode are formed in the middle of the mainboard. According to the utility model, the PCB main body is arranged to replace the defect that the existing output wire and input wire need to be wound on the magnetic ring for two to three turns and then are connected to the mainboard, so that the larger space in the electronic equipment is occupied, that is, the PCB main body is utilized to replace the wire wound on the inner part of the magnetic ring, and the occupied area of the existing structure is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the field of PCB boards, and in particular relates to an EMC filtering PCB board. Background Art

[0002] In the design of electronic products, due to the requirements of electromagnetic compatibility, a magnetic ring is often placed on the input line or output line, generally with two to three turns. However, the magnetic ring takes up space inside the product and is not easy to place. It will increase the space occupied by the motherboard and it is inconvenient to install it on the motherboard. In view of this, the present utility model is proposed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an EMC filter PCB board.

[0004] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0005] An EMC filter PCB board, comprising a PCB board body, a magnetic ring and a main board used in conjunction with the PCB board, wherein grooves for limiting the magnetic ring are provided in the middle of both sides of the PCB board body, and two upper input pins and lower output pins connected to the wiring line circuits in the middle of the front and rear sides of the PCB board body are provided at the upper and lower ends of the PCB board body;

[0006] The lower end of the PCB board body is plugged into the main board through two lower output pins, a first positioning hole for plugging the lower output pins is opened in the middle of the main board, and a fixed protrusion is also fixed in the middle of the lower end of the PCB board body to connect with the second positioning hole in the middle of the main board;

[0007] Lead wires matching the number of routing wires are wound around the outside of the magnetic ring, and the lead wires are connected to the routing wire circuit.

[0008] Optionally, the outer dimension of the upper end of the PCB board body is smaller than the outer dimension of the lower end of the PCB board body, and the upper edge of the PCB main board is chamfered, and the outer dimension of the upper end of the PCB board body is slightly larger than the inner dimension of the magnetic ring.

[0009] Optionally, the inner walls of the two first positioning holes are symmetrically provided with contact metal blocks connected to the mainboard circuit, and a fixing area for the end of the lower output pin to abut is provided between the two contact metal blocks.

[0010] Optionally, two first elastic rings are fixed to the inner wall of the second positioning hole and are in contact with the outer concave surface of the fixed protruding end.

[0011] Optionally, the upper ends of the first positioning hole and the second positioning hole are fixed with an annular sleeve for installing the connector by screws, and an annular groove that interferes with the second elastic ring is opened on the inner wall of each annular sleeve, and the second elastic ring is fixedly mounted on the outer wall of the connector, and the connector is fixedly mounted on the bottom of the PCB board body, and a protective pad is fixedly bonded to the top of each annular sleeve.

[0012] Optionally, countersunk holes for installation bolts to pass through are formed at four corners of the upper end of the mainboard, and a non-slip gasket is fixedly bonded to the upper end of each countersunk hole.

[0013] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described below at the same time:

[0014] The utility model replaces the disadvantage that the existing output wires and input wires need to be wound around the magnetic ring for two to three turns before being connected to the main board, which occupies a large space inside the electronic device, by providing a PCB board main body. That is, the PCB board main body is used to replace the wires wound inside the magnetic ring, which effectively reduces the area occupied by the existing structure and makes it more convenient for workers to assemble. When in use, it is only necessary to connect the input wire with the upper input end pin of the PCB board main body, and then connect the lead wire with the routing line circuit on the surface of the PCB board main body, and then directly plug the PCB board main body with the two first positioning holes of the main board using the lower output end pin to complete the fixation, thereby simplifying the assembly process of workers.

[0015] The specific implementation modes of the present utility model are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0018] Figure 2 It is a combined parts structure diagram of the PCB board body, leads, traces, upper input pins and lower output pins in the utility model;

[0019] Figure 3 This is a structural diagram of the combined parts of the magnetic ring in the utility model;

[0020] Figure 4 It is a longitudinal section schematic diagram of the combined parts structure of the annular set and the connector in the utility model;

[0021] Figure 5 forFigure 1 Schematic diagram of the structure of part A in

[0022] Figure 6 is Figure 1 Schematic diagram of the structure of part B in

[0023] Figure 7 is Figure 1 Schematic diagram of the structure of part C in

[0024] In the attached drawings, the list of components represented by each label is as follows:

[0025] 1. PCB board main body; 2. Magnetic ring; 3. Circuit trace; 4. Upper input terminal pin; 5. Lower output terminal pin; 6. Main board; 7. First positioning hole; 8. Second positioning hole; 9. Fixed protruding end; 10. Lead wire; 11. Contact metal block; 12. First elastic ring; 13. Connector; 14. Ring-shaped kit; 15. Second elastic ring; 16. Ring-shaped groove; 17. Protection pad; 18. Mounting bolt; 19. Anti-slip washer.

[0026] It should be noted that these attached drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Specific embodiments

[0027] Now, the present utility model will be further described in detail with reference to the attached drawings.

[0028] Please refer to Figures 1 to 7 , the present utility model provides a technical solution: an EMC filtering PCB board, including a PCB board main body 1, a magnetic ring 2, and a main board 6 used in cooperation with the PCB board. Grooves for limiting the magnetic ring 2 are provided in the middle of both sides of the PCB board main body 1. Two upper input terminal pins 4 and two lower output terminal pins 5 that are electrically connected to the circuit traces 3 in the middle of the front and back sides of the PCB board main body 1 are provided at both the upper and lower ends of the PCB board main body 1;

[0029] The lower end of the PCB board main body 1 is inserted into the main board 6 through two lower output terminal pins 5. A first positioning hole 7 for inserting the lower output terminal pins 5 is provided in the middle of the main board 6. A fixed protruding end 9 that is docked with the second positioning hole 8 in the middle of the main board 6 is also fixed in the middle of the lower end of the PCB board main body 1;

[0030] The outside of the magnetic ring 2 is wound with leads 10 that match the number of trace lines 3. The leads 10 are electrically connected to the trace lines 3. Considering that in the design of electronic products, due to electromagnetic compatibility requirements, magnetic rings 2 are often sleeved on input or output lines, usually with two to three turns. However, placing the magnetic ring 2 inside the product takes up space and is not easy to place, which will increase the occupied space of the main board 6. Moreover, there are inconveniences when installing it on the main board 6. The utility model replaces the drawback that the existing output line and input line need to be wound around the magnetic ring 2 for two to three turns and then connected to the main board 6, resulting in a large space occupied inside the electronic device, by setting the PCB main body. That is, the PCB board main body 1 replaces the wire wound inside the magnetic ring 2, effectively reducing the area occupied by the existing structure and making it more convenient for workers to assemble. When in use, only need to connect the input line to the upper input terminal pin 4 of the PCB board main body 1, then connect the lead 10 to the trace line 3 on the surface of the PCB board main body 1, and then directly insert the PCB board main body 1 into the two first positioning holes 7 of the main board 6 through the lower output terminal pin 5 to complete the fixation, simplifying the assembly process of workers.

[0031] Among them, the outer dimension of the upper end of the PCB board main body 1 is smaller than the outer dimension of the lower end of the PCB board main body 1, and the upper edge of the PCB main board 6 is chamfered. The outer dimension of the upper end of the PCB board main body 1 is slightly larger than the inner dimension of the magnetic ring 2. Considering that the magnetic ring 2 needs to be installed in the middle of the PCB board main body 1, when designing the PCB board main body 1, the upper end dimension of the PCB board main body 1 is designed to be smaller than the lower end dimension of the PCB board main body 1, so that the magnetic ring 2 can be stuck in the middle of the PCB board main body 1. And in order for the magnetic ring 2 not to slip off the upper end of the PCB board main body 1, the upper end dimension of the PCB board main body 1 is designed to be slightly larger than the inner dimension of the magnetic ring 2, and its edge is chamfered. When installing the magnetic ring 2, the PCB board main body 1 can be directly inserted into the inside of the magnetic ring 2, that is, the PCB board has a certain toughness, and after being bent, it can just be inserted into the inside of the magnetic ring 2, and the magnetic ring 2 is just stuck in the middle of the PCB board main body 1 and will not slip off.

[0032] Among them, contact metal blocks 11 electrically connected to the main board 6 are symmetrically arranged on the inner walls of the two first positioning holes 7, and a fixing area for the end of the lower output terminal pin 5 to abut is provided between the two contact metal blocks 11. By setting the contact metal blocks 11, when the PCB board main body 1 is inserted into the first positioning hole 7, the main board 6 will abut against the lower output terminal pin 5 through the contact metal blocks 11, so as to supply the external wiring to be electrically connected to the main board 6 through the PCB board main body 1.

[0033] Among them, two first elastic rings 12 that are in contact with the outer concave surfaces of the fixed protruding ends 9 are fixed to the inner wall of the second positioning hole 8. Considering that the main body 1 of the PCB board and the main board 6 are only connected by inserting the lower output pins into the lower positioning holes, the lower output pins are the load-bearing points. When the device is vibrated, the lower output pins may break. Therefore, to improve this situation, the device will use the fixed protruding ends 9 and the second positioning holes 8, as well as the plug-in parts 13 and the annular kits 14 for auxiliary fixation, thereby improving the stability between the main body 1 of the PCB board and the main board 6, and effectively avoiding the problem that the lower output end pins 5 are the load-bearing points and are easily broken due to vibration.

[0034] Among them, annular kits 14 for installing the plug-in parts 13 are fixed to the upper ends of the first positioning hole 7 and the second positioning hole 8 by screws. Annular grooves 16 that are in contact with the second elastic rings 15 are formed in the inner walls of each annular kit 14, and the second elastic rings 15 are fixedly installed on the outer walls of the plug-in parts 13. The plug-in parts 13 are fixedly installed at the bottom of the main body 1 of the PCB board. Protective pads 17 are fixedly adhered to the tops of each annular kit 14. By providing the second elastic rings 15, when the annular kits 14 are inserted into the plug-in parts 13, the second elastic rings 15 can be embedded into the interiors of the annular grooves 16, thereby increasing the friction between the plug-in parts 13 and the annular kits 14 and improving the fixing effect.

[0035] Among them, counterbores for the mounting bolts 18 to pass through are formed through the four corners at the upper end of the main board 6. Anti-slip washers 19 are fixedly adhered to the upper ends of each counterbore. By providing the mounting bolts 18, the main board 6 is fixed inside the electronic device, and the presence of the anti-slip washers 19 increases the friction between the mounting bolts 18 and the counterbores.

[0036] The present utility model is not limited to the above embodiments. Any person should know that structural changes made under the inspiration of the present utility model, as long as they have the same or similar technical solutions as the present utility model, all fall within the protection scope of the present utility model. The technologies, shapes, and structures not described in detail in the present utility model are all well-known technologies.

Claims

1. An EMC filter PCB board, comprising a PCB board body (1), a magnetic ring (2) and a main board (6) used in conjunction with the PCB board, characterized in that: The middle parts of both sides of the PCB body (1) are provided with grooves for limiting the magnetic ring (2), and the upper and lower ends of the PCB body (1) are provided with two upper input pins (4) and lower output pins (5) which are circuit-connected to the wiring lines (3) in the middle parts of the front and rear sides of the PCB body (1); The lower end of the PCB board body (1) is plugged into the main board (6) via two lower output pins (5); a first positioning hole (7) for plugging the lower output pins (5) is provided in the middle of the main board (6); a fixed protruding end (9) is also fixed in the middle of the lower end of the PCB board body (1) and is connected to a second positioning hole (8) in the middle of the main board (6); Lead wires (10) whose number matches the number of the trace wires (3) are wound around the outside of the magnetic ring (2), and the lead wires (10) are connected to the trace wires (3) in a circuit.

2. An EMC filter PCB board according to claim 1, characterized in that: The outer dimensions of the upper end of the PCB board body (1) are smaller than the outer dimensions of the lower end of the PCB board body (1), and the upper edge of the PCB main board (6) is chamfered, and the outer dimensions of the upper end of the PCB board body (1) are slightly larger than the inner dimensions of the magnetic ring (2).

3. An EMC filter PCB board according to claim 1, characterized in that: The inner walls of the two first positioning holes (7) are symmetrically provided with contact metal blocks (11) connected to the circuit of the main board (6), and a fixing area for the end of the lower output pin (5) to abut is provided between the two contact metal blocks (11).

4. The EMC filter PCB board according to claim 1, characterized in that: Two first elastic rings (12) are fixed to the inner wall of the second positioning hole (8) and are in contact with the outer concave surface of the fixed protruding end (9).

5. The EMC filter PCB board according to claim 1, characterized in that: An annular sleeve (14) for mounting the plug-in connector (13) is fixed to the upper ends of the first positioning hole (7) and the second positioning hole (8) by means of screws, an annular groove (16) for contacting the second elastic ring (15) is provided on the inner wall of each annular sleeve (14), and the second elastic ring (15) is fixedly mounted on the outer wall of the plug-in connector (13), the plug-in connector (13) is fixedly mounted on the bottom of the PCB board body (1), and a protective pad (17) is fixedly bonded to the top of each annular sleeve (14).

6. The EMC filter PCB board according to claim 1, characterized in that: Countersunk holes for the installation bolts (18) to pass through are formed through the four corners of the upper end of the main board (6), and a non-slip gasket (19) is fixedly bonded to the upper end of each countersunk hole.

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