WO2016115952A1

WO2016115952A1 - Pcb having magnetic core mounting hole, and transformer

Info

Publication number: WO2016115952A1
Application number: PCT/CN2015/097296
Authority: WO
Inventors: 袁林; 聂富刚; 马军华; 黄兆平
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-01-19
Filing date: 2015-12-14
Publication date: 2016-07-28
Also published as: CN204377248U

Abstract

A PCB having a magnetic core mounting hole, and a transformer. The PCB comprises at least one magnetic core mounting hole. At least one of the magnetic core mounting holes comprises a mounting hole (11) and at least two pieces of conductive electroless plating copper (121, 122). The inner side of the mounting hole (11) comprises at least one insulation segment and/or at least one piece of conductive electroless plating copper (121, 122). When a magnetic core (14) corresponding to the core mounting hole (11) penetrates through the mounting hole (11), the magnetic core (14) is contacted with the insulation segment and/or one piece of the conductive electroless plating copper (121, 122).

Description

PCB board and transformer with magnetic core mounting holes

Technical field

The present invention relates to the field of PCB boards, and in particular to a PCB board and a transformer having a core mounting hole.

Background technique

AC-DC and DC-DC module power supplies are widely used in important fields such as communication. The module power supply supplies power to important components such as chips by converting the voltage of -48V on the main board to a low voltage such as 5.5V.

In order to achieve voltage conversion, the transformer is an indispensable part of the module power supply. Such a transformer is generally formed by the core passing through the primary and secondary coils in the PCB. As shown in Figure 1, the primary and secondary sides of the transformer are shown. The current between the coils is conducted through the metallized holes near the mounting holes. As shown in Figure 2, with the continuous development of communication equipment, the power requirements of the transformer are getting higher and higher, and the current passing through the coil per unit area. It is also required to be larger and larger. The traditional metallized small hole has a large area and a small cross-sectional area, and it is impossible to achieve high-current conduction. At this time, the way of over-current is realized by the copper core of the hole mounting hole. Adopting, as shown in Fig. 3, through the large-area hole wall sinking copper, the conduction of the large current of the primary side and the secondary side coil is realized, but this method has a large disadvantage, because the potentials of the primary side and the secondary side are different, when the magnetic core At the same time, when the copper wall of two different potentials is exposed to copper, the magnetic core has a certain conductivity, which will short the primary coil and the secondary coil, and the voltage conversion cannot be realized, as shown in Fig. 3.

In order to prevent the occurrence of short circuit, the industry generally uses insulating adhesive paper to wrap the magnetic core, or spray insulating varnish on the magnetic core to isolate the magnetic core and the copper wall of the hole to achieve insulation, but these two ways add additional material cost and processing. Cost, market competitiveness is poor.

Summary of the invention

The main technical problem to be solved by the present invention is to provide a PCB board having a magnetic core mounting hole, which solves the problem of short circuit caused by the existing copper core of the hole wall contacting the different potentials at the same time.

In order to solve the above problems, the present invention provides a PCB board having a core mounting hole, including at least one core mounting hole; at least one of the core mounting holes includes a mounting hole and at least two conductive copper sinks The inner side of the mounting hole includes at least one insulating segment and/or at least one conductive copper sink; when the magnetic core corresponding to the mounting hole passes through the mounting hole, the magnetic core and the insulating segment and/or conductive A conductive copper sink in the copper sink.

In an embodiment of the invention, the insulating segment includes a short-circuit prevention position, when the inside of the mounting hole includes at least one short-circuit prevention position and at least two conductive copper sinks; in any two adjacent conductive copper sinks The short-circuit prevention position is set; the short-circuit prevention position protrudes toward the hole of the mounting hole; the height of the short-circuit prevention position is larger than the surface where the conductive copper sink is located.

In an embodiment of the present invention, when the inside of the mounting hole includes two conductive copper sinks, and the shape of the mounting hole is circular, both ends of the two conductive copper sinks are on the same semicircular side, in two When the distance between the ends of the conductive copper sinks is small, the short-circuit prevention position is set; or when one end of the two copper sinks exceeds the semi-circular side, the short-circuit prevention positions are respectively disposed between the adjacent ends of the two conductive copper sinks.

In an embodiment of the present invention, when the inside of the mounting hole includes two conductive copper sinks, and the shape of the mounting hole is square, two conductive copper ends are present on the same side or on adjacent sides. When there are two ends of the conductive copper sink, a short-circuit prevention position is provided between the adjacent ends of the two conductive copper sinks.

In an embodiment of the present invention, when the inner side of the mounting hole includes two conductive copper sinks, and the shape of the mounting hole is elliptical, when both ends of the two conductive copper sinks are on the same long axis or short axis side a short-circuit prevention position is provided between the two conductive copper-plated ends; or when one of the two conductive copper sinks exceeds the long-axis or the short-axis side, respectively, an anti-proof is provided between the adjacent ends of the two conductive copper sinks. Short circuit position.

In an embodiment of the invention, when the inner side of the mounting hole includes at least three conductive copper sinks, a short-circuit prevention position is respectively disposed between adjacent ends of the conductive copper sinks.

In an embodiment of the invention, the short circuit protection bit is formed by cutting the PCB board itself.

In an embodiment of the present invention, when the inner side of the mounting hole includes a conductive copper sink, the surface of the conductive copper sinks a surface of the hole of the mounting hole or a hole recessed in the mounting hole. The wall is on the surface.

In an embodiment of the invention, the insulating segment includes a mounting hole wall, when the inside of the mounting hole includes at most one conductive copper sink; and other conductive copper sinks are disposed outside the mounting hole; The copper is insulated by the PCB material.

In an embodiment of the invention, when the core mounting hole includes a mounting hole and two conductive copper sinks, a conductive copper sink is disposed on the inner hole wall of the mounting hole; another conductive copper sink is disposed at The outer side of the mounting hole; or two conductive copper sinks are disposed outside the mounting hole, and the two hole walls are insulated by the PCB material.

In order to solve the above problems, the present invention also provides a transformer comprising the PCB board and the magnetic core as described above, the magnetic core passing through a core mounting hole of the PCB board.

The beneficial effects of the invention are:

The present invention provides a PCB board having a magnetic core mounting hole and a transformer, the PCB board including at least one magnetic core mounting hole; at least one of the magnetic core mounting holes includes a mounting hole and at least two conductive copper sinks The inner side of the mounting hole includes at least one insulating segment and/or at least one conductive copper sink; when the magnetic core corresponding to the mounting hole passes through the mounting hole, one of the magnetic core and the insulating segment and/or one of the conductive copper sinks contact. However, the existing two holes of the copper are disposed inside the mounting hole, and the magnetic core can simultaneously contact the two holes to form a copper, thereby causing a short circuit, thereby requiring insulation of the magnetic core, resulting in an increase in material cost, and the present invention enables the magnetic core Contact with at most one conductive copper sink prevents the short circuit from being contacted by the magnetic core with different potential conductive copper sinks. This core mounting hole is easy to process and does not require additional processing of the magnetic core, which has a cost advantage.

DRAWINGS

1 is a schematic view showing a transformer in which a magnetic core passes through a PCB coil in the prior art;

2 is a schematic view of a prior art utilizing metal vias for overcurrent;

3 is a schematic view showing a short circuit caused by a magnetic core contacting a different potential hole wall at the same time in the prior art;

4 is a schematic view showing a magnetic core mounting hole of a PCB board according to Embodiment 1 of the present invention;

5 is a schematic view showing another magnetic core mounting hole of a PCB board according to Embodiment 1 of the present invention;

6 is a schematic view showing a magnetic core mounting hole of a PCB board according to Embodiment 2 of the present invention;

7 is a schematic view showing a magnetic core mounting hole of a PCB board according to Embodiment 3 of the present invention;

8 is a schematic view showing a magnetic core mounting hole of a PCB board according to Embodiment 4 of the present invention;

9 is a schematic view showing a magnetic core mounting hole of a PCB board according to Embodiment 5 of the present invention;

10 is a schematic view showing a magnetic core mounting hole of a PCB board according to Embodiment 6 of the present invention;

11 is a schematic view showing a magnetic core mounting hole of a PCB board according to Embodiment 7 of the present invention;

12 is a schematic view showing a magnetic core mounting hole of a PCB board according to Embodiment 8 of the present invention;

13 is a schematic view showing a magnetic core mounting hole of a PCB board according to Embodiment 9 of the present invention;

Figure 14 is a schematic view showing a magnetic core mounting hole of a PCB board in the tenth embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings.

Embodiment 1:

The PCB board with magnetic core mounting holes provided by the present invention includes at least one magnetic core mounting hole; at least one of the magnetic core mounting holes includes a mounting hole and at least two conductive copper sinks; the inner side of the mounting hole includes At least one insulating segment and/or at least one conductive copper sink; when the magnetic core corresponding to the mounting hole passes through the mounting hole, the magnetic core is in contact with one of the insulating segment and/or one of the conductive copper sinks. It is worth noting that the insulation section here can be the short-circuit proof or the hole wall of the mounting hole, that is, the insulation material of the PCB itself. It should be understood that the magnetic core passes through the mounting hole, and the non-conductive parts of the magnetic core contact are Insulation section. The conductive copper sink here should be understood to include copper sinking in the hole wall, of course, not only limited to copper sinking in the hole wall, but also capable of conducting copper for the transformer. Further, in the embodiment, the insulating segment includes a short-circuit prevention position, and the inner side of the mounting hole includes at least one short-circuit prevention position and at least When two conductive copper sinks; an anti-short-circuit position is provided between any two adjacent conductive copper sinks; the short-circuit prevention position protrudes toward the hole of the mounting hole; the height of the short-circuit prevention position is larger than the surface where the conductive copper sink is located. In this embodiment, the mounting hole is circular, and two conductive copper sinks are taken as an example, and the arcs of the two conductive copper sinks are small. As shown in FIG. 4, the core mounting hole includes a mounting hole 11, two

conductive copper sinks

121 and 122, and a short-circuit prevention position 13. The conductive copper sink 121 and the conductive copper sink 122 have different potentials; the short-circuit prevention bit 13 is in a conductive sink. The position between the copper 121 and the conductive copper sink 122, the short-circuit prevention position 13 is beyond the surface of the conductive copper sink 121 and the surface of the conductive copper sink 122. When the magnetic core 14 passes through the mounting hole 11, the magnetic core 14 will be separated due to the isolation of the short-circuit prevention bit 13. It is impossible to contact the surface of the conductive copper plate 121 and the surface of the conductive copper sink 122 at the same time, thereby avoiding the occurrence of a short circuit. And the surface of the conductive copper sink 121 and the surface of the conductive copper sink 122 on which the mounting hole 11 is located. Of course, the surface of the conductive copper sink 121 and the surface of the conductive copper sink 122 may also be recessed on the surface where the mounting hole 11 is located, as shown in FIG. Here, the surface of the conductive copper plate 121 and the surface of the conductive copper sink 122 may also be on the surface where the mounting hole 11 is located. It should be noted that in all of the following embodiments, it should be understood that when there is a conductive copper sink inside the mounting hole, the relationship with the surface on which it is mounted includes the above, and will not be repeatedly described later. Further, the inner side of the short-circuit prevention position 13 is of a circular arc shape to facilitate better contact with the magnetic core 14. In other preferred embodiments, the short-circuit prevention position 13 may also have a shape of a flat shape, an arc shape, a dot shape, a square shape, a pointed shape, or the like. It should be understood that the short circuit prevention 13 is only required to protrude from the conductive copper sink, and the specific shape is not limited. Preferably, the material of the short-circuit prevention position 13 may also be an insulating material such as plastic, oxide or resin. Further, the short-circuit proof bit 13 is part of the PCB and retains the raised portion during processing. It is only necessary to drill the magnetic core hole, that is, the mounting hole 11 according to the normal processing procedure of the PCB after the copper is deposited on the sidewall of the PCB, and the predetermined short-circuit prevention position 13 is left, the processing is simple, and no additional material and process cost are increased. Preferably, it should be understood that when both ends of the two conductive copper sinks are on the same semicircular side, a short circuit preventing position is set between the distance between the two conductive copper sink ends, that is, if the arc of the conductive copper sink is small, the magnetic core It is only possible to contact the two conductive copper sinks on the side of the semicircle, such that at least one of the short-circuit prevention positions between the two is prevented from simultaneously contacting the two conductive copper sinks.

Embodiment 2:

In this embodiment, the mounting hole is circular and has two conductive copper sinks as an example for description. And the two conductive copper sinks have a large curvature, which facilitates the passage of a larger current. As shown in FIG. 6, the core mounting hole includes a mounting hole 21, two conductive copper sinks 221 and 222, two short-circuit prevention positions 231 and 232, and the conductive copper sink 221 and the conductive copper sink 222 have different potentials; 231 and 232 are located between the conductive copper 221 and the conductive copper 222, and the short-circuit prevention positions 231 and 232 are beyond the surface of the conductive copper 221 and the conductive copper 222. When the magnetic core 24 passes through the mounting hole 21, due to the short-circuit prevention position With the isolation of 231 and 232, the magnetic core 24 will not be able to simultaneously contact the conductive copper 221 surface and the conductive copper 222 surface, thereby avoiding the occurrence of a short circuit. Further, the inner sides of the short-circuit prevention positions 231 and 232 are of a circular arc shape to facilitate better contact with the magnetic core 24. In other preferred embodiments, the short-circuit prevention positions 231 and 232 may also be in the shape of a flat shape, an arc shape, a dot shape, a square shape, a pointed shape, or the like. It should be understood that the short-

circuit preventions

231 and 232 are only required to protrude beyond the conductive copper, and the specific shape is not limited. Preferably, the material of the short-circuit prevention positions 231 and 232 may also be an insulating material such as plastic, oxide or resin. Further, the short-circuit

proof bits

231 and 232 are part of the PCB and are retained during processing. It is only necessary to drill the core hole, that is, the mounting hole 21, according to the normal processing of the PCB after the copper sidewall of the PCB is deposited, and leave the predetermined short-circuit prevention positions 231 and 232, which is simple in processing, without additional material and process cost increase. Preferably, it should be understood that when both ends of the two conductive copper sinks exceed the same semicircular side, a short-circuit prevention position is respectively set between the distances between the two conductive copper-plated ends, that is, if the arc of the conductive copper sink is large, the magnetic core When it is possible to contact the semi-circular sides of the two conductive copper sinks, the at least one short-circuit prevention position between the two is prevented from simultaneously contacting the two conductive copper sinks.

Embodiment 3:

In this embodiment, the mounting hole is square and has two conductive copper sinks as an example, and the arcs of the two conductive copper sinks are small. As shown in FIG. 7, the core mounting hole includes a mounting hole 31, two conductive copper sinks 321 and 322, and a short-circuit prevention position 33. The conductive copper sink 321 and the conductive copper sink 322 have different potentials; the short-circuit prevention bit 33 is in a conductive sink. Position between copper 321 and conductive copper 322 The short-circuiting position 33 is beyond the surface of the conductive copper sink 321 and the surface of the conductive copper sink 322. When the magnetic core 34 passes through the mounting hole 31, the magnetic core 34 cannot simultaneously contact the conductive copper sink 321 surface and the conductive sink due to the isolation of the short-circuit preventing position 33. Copper 322 faces to avoid short circuits. Further, the inner side of the short-circuit prevention position 33 is a flat surface for facilitating better contact with the magnetic core 34. In other preferred embodiments, the shape of the short-circuit prevention position 33 may also be a flat shape, an arc shape, a dot shape, a square shape, a pointed shape, or the like. It should be understood that the short circuit prevention 33 is only required to protrude from the conductive copper sink, and the specific shape is not limited. Preferably, the material of the short-circuit prevention position 33 may also be an insulating material such as plastic, oxide or resin. Further, the short-circuit proof bit 33 is part of the PCB and retains the raised portion during processing. It is only necessary to drill the magnetic core hole, that is, the mounting hole 31, according to the normal processing of the PCB after the copper sidewall of the PCB is deposited, and the predetermined short-circuit prevention position 33 is left, the processing is simple, and no additional material and process cost are increased. Preferably, it should be understood that when there are two conductive copper ends on the same side or two conductive copper ends on the adjacent sides, a short-circuit prevention position is provided between the adjacent ends of the two conductive copper sinks, that is, if When the arc of the conductive copper sink is small, the magnetic core may only be in contact with the two conductive copper sinks on the same side thereof, and the at least one short-circuit prevention position between the two is prevented from simultaneously simultaneously with the two conductive copper sinks. contact.

Embodiment 4:

In this embodiment, the mounting hole is square and has two conductive copper sinks as an example for description. And the two conductive copper sinks have a large curvature, which facilitates the passage of a larger current. As shown in FIG. 8, the core mounting hole includes a mounting hole 41, two conductive copper sinks 421 and 422, two short-circuit prevention positions 431 and 432, and the conductive copper sink 421 and the conductive copper sink 422 have different potentials; 431 and 432 are located between the conductive copper 421 and the conductive copper 422, and the short-circuit prevention positions 431 and 432 are beyond the surface of the conductive copper 421 and the conductive copper 422. When the magnetic core 44 passes through the mounting hole 41, due to the short-circuit prevention position With the isolation of 431 and 432, the magnetic core 44 will not be able to simultaneously contact the conductive copper 421 surface and the conductive copper 422 surface, thereby avoiding the occurrence of a short circuit. Further, the inner sides of the short-circuit prevention positions 431 and 432 are planar, facilitating better contact with the magnetic core 44. In other preferred embodiments, the short-circuit prevention positions 431 and 432 may also be in the shape of a flat shape, an arc shape, a dot shape, a square shape, a pointed shape, or the like. Should understand In order to prevent the

short circuits

431 and 432 from protruding beyond the conductive copper, the specific shape is not limited. Preferably, the material of the short-circuit prevention positions 431 and 432 may also be an insulating material such as plastic, oxide or resin. Further, the short-circuit

proof bits

431 and 432 are part of the PCB and are retained during processing. It is only necessary to drill the magnetic core hole, that is, the mounting hole 41, according to the normal processing procedure of the PCB after the copper sidewall of the PCB is deposited, and the predetermined short-circuit prevention positions 431 and 432 are left, the processing is simple, and no additional material and process cost are increased. Preferably, it should be understood that when both ends of the two conductive copper sinks exceed the same side, respectively, a short-circuit prevention position is set between the distances between the two conductive copper-plated ends, that is, if the arc of the conductive copper sink is large, the magnetic core When it is possible to contact two different conductive copper sides, the at least one short-circuit prevention position between the two is prevented from simultaneously contacting the two conductive copper sinks. It should be understood that there are two sides on the same side. When the ends of the conductive copper sinks or the ends of the two conductive copper sinks are present on the adjacent side edges, a short-circuit prevention position is provided between the adjacent ends of the two conductive copper sinks.

Embodiment 5:

In this embodiment, the mounting hole is elliptical and has two conductive copper sinks as an example, and the two conductive copper sinks are small in curvature and are on the long axis side. As shown in FIG. 9, the core mounting hole includes a mounting hole 51, two conductive copper sinks 521 and 522, and a short-circuit prevention position 53. The conductive copper sink 521 and the conductive copper sink 522 have different potentials; the short-circuit prevention terminal 53 is in a conductive sink. The position between the copper 521 and the conductive copper sink 522, the short circuit preventing position 53 is beyond the surface of the conductive copper 521 and the conductive copper 522. When the magnetic core 54 passes through the mounting hole 51, the magnetic core 54 will be separated due to the short circuit 53 It is impossible to contact the conductive copper 521 surface and the conductive copper 522 surface at the same time, thereby avoiding the occurrence of a short circuit. Further, the inner side of the short-circuit prevention preventing portion 53 is of a circular arc shape to facilitate better contact with the magnetic core 54. In other preferred embodiments, the short-circuit prevention position 53 may also have a shape of a flat shape, an arc shape, a dot shape, a square shape, a pointed shape, or the like. It should be understood that the short circuit prevention 53 is only required to protrude beyond the conductive copper, and the specific shape is not limited. Preferably, the material of the short-circuit prevention position 53 may also be an insulating material such as plastic, oxide or resin. Further, the short-circuit proof bit 53 is part of the PCB and retains the raised portion during processing. It is only necessary to drill the core hole, that is, the mounting hole 51, according to the normal processing of the PCB after the copper sidewall of the PCB is sun-baked. And the predetermined anti-short circuit position 53 can be left, the processing is simple, and no additional materials and process costs are increased. Preferably, it should be understood that when both ends of the two conductive copper sinks are on the same long axis side, a short circuit prevention position is set between the distances between the two conductive copper sink ends, that is, if the arc of the conductive copper sink is small, the magnetic When the core is only in contact with the two conductive cups of copper on the side of the half shaft, the at least one short circuit preventing position between the two is prevented from simultaneously contacting the two conductive copper sinks.

Example 6:

In this embodiment, the mounting hole is elliptical and has two conductive copper sinks as an example, and the two conductive copper sinks are small in curvature and are on the short axis side. As shown in FIG. 10, the core mounting hole includes a mounting hole 61, two conductive copper sinks 621 and 622, and a short-circuit prevention position 63. The conductive copper sink 621 and the conductive copper sink 622 have different potentials; the short-circuit prevention portion 63 is in a conductive sink. The position between the copper 621 and the conductive copper sink 622, the short-circuit prevention position 63 exceeds the surface of the conductive copper sink 621 and the surface of the conductive copper sink 622. When the magnetic core 64 passes through the mounting hole 61, the magnetic core 64 will be separated by the short-circuit prevention position 63. It is impossible to contact the conductive copper 621 surface and the conductive copper 622 surface at the same time, thereby avoiding the occurrence of a short circuit. Further, the inner side of the short-circuit prevention position 63 is of a circular arc shape to facilitate better contact with the magnetic core 64. In other preferred embodiments, the shape of the short-circuit prevention position 63 may also be a flat shape, an arc shape, a dot shape, a square shape, a pointed shape, or the like. It should be understood that the short circuit prevention 63 is only required to protrude from the conductive copper sink, and the specific shape is not limited. Preferably, the material of the short-circuit prevention position 63 may also be an insulating material such as plastic, oxide or resin. Further, the short-circuit proof bit 63 is part of the PCB and retains the raised portion during processing. It is only necessary to drill the magnetic core hole, that is, the mounting hole 61, according to the normal processing procedure of the PCB after the copper is deposited on the sidewall of the PCB, and the predetermined short-circuit prevention position 63 is left, the processing is simple, and no additional material and process cost are increased. Preferably, it should be understood that when both ends of the two conductive copper sinks are on the same short-axis side, a short-circuit prevention position is set between the distances between the two conductive copper-plated ends, that is, if the arc of the conductive copper sink is small, the magnetic When the core is only in contact with the two conductive cups of copper on the side of the half shaft, the at least one short circuit preventing position between the two is prevented from simultaneously contacting the two conductive copper sinks.

Example 7:

In this embodiment, the mounting hole is elliptical and has two conductive copper sinks as an example for description. And the two conductive copper sinks have a large curvature, which facilitates the passage of a larger current. As shown in FIG. 11, the core mounting hole includes a mounting hole 71, two conductive copper sinks 721 and 722, two short circuit prevention positions 731 and 732, and the conductive copper sink 721 and the conductive copper sink 722 have different potentials; 731 and 732 are located between the conductive copper sink 721 and the conductive sink copper 722, and the short-circuit prevention positions 731 and 732 are beyond the conductive copper sink 721 surface and the conductive copper sink 722 surface. When the magnetic core 74 passes through the mounting hole 71, due to the short-circuit prevention position With the isolation of 731 and 732, the magnetic core 74 will not be able to simultaneously contact the conductive copper 721 surface and the conductive copper 722 surface, thereby avoiding the occurrence of a short circuit. Further, the inner sides of the short-circuit prevention positions 731 and 732 are of a circular arc shape to facilitate better contact with the magnetic core 74. In other preferred embodiments, the short-circuit prevention positions 731 and 732 may also be in the shape of a flat shape, an arc shape, a dot shape, a square shape, a pointed shape, or the like. It should be understood that the short-

circuit prevention

731 and 732 are only required to protrude from the conductive copper sink, and the specific shape is not limited. Preferably, the material of the short-circuit prevention positions 731 and 732 may also be an insulating material such as plastic, oxide or resin. Further, the short-circuit

proof bits

731 and 732 are part of the PCB and are retained during processing. It is only necessary to drill the magnetic core hole, that is, the mounting hole 71, according to the normal processing of the PCB after the copper sidewall of the PCB is deposited, and leave the predetermined short-circuit prevention positions 731 and 732, and the processing is simple, and no additional material and process cost are increased. Preferably, it should be understood that when both ends of the two conductive copper exceeds the same half shaft, respectively, a short circuit prevention position is set between the distances between the two conductive copper ends, that is, if the arc of the conductive copper sink is large, that is, two When there is one end of the conductive copper sink beyond the long axis or the short axis side, when the magnetic core may be in contact with the different semi-axis sides of the two conductive copper sinks, the at least one short-circuit prevention position between the two is prevented. It is in contact with two conductive copper sinks at the same time.

Example 8:

In this embodiment, the mounting hole is circular and has three conductive copper sinks as an example for description. And the two conductive copper sinks have a large curvature, which facilitates the passage of a larger current. As shown in FIG. 12, the core mounting hole includes a mounting hole 81, three conductive copper sinks 821, 822, and 823, and three short-circuit prevention positions. 831, 832 and 833, the conductive copper 821, the conductive copper 822 and the conductive copper 823 have different potentials; the short-circuit prevention positions 831, 832 and 833 are located between the conductive copper 821, the conductive copper 822 and the conductive copper 823 With each other, the short-circuit prevention positions 831, 832, and 833 are beyond the surface of the conductive copper 821, the conductive copper 822, and the conductive copper sink 823. When the magnetic core 84 passes through the mounting hole 81, the isolation of the short-circuit prevention positions 831, 832, and 833 is caused. The magnetic core 84 will not be able to simultaneously contact the conductive copper 821, the conductive copper 822 and the conductive copper 823 surface, thereby avoiding the occurrence of a short circuit. Further, the inner sides of the short-circuit prevention positions 831, 832, and 833 are of a circular arc shape to facilitate better contact with the magnetic core 84. In other preferred embodiments, the short-circuit prevention positions 831, 832, and 833 may also be in the shape of a flat shape, an arc shape, a dot shape, a square shape, a pointed shape, or the like. It should be understood that the short-

circuit preventions

231 and 232 are only required to protrude beyond the conductive copper, and the specific shape is not limited. Preferably, the material of the short-circuit prevention positions 831, 832, and 833 may also be an insulating material such as plastic, oxide, or resin. Further, the short-circuit

proof bits

831, 832, and 833 are part of the PCB that remain in the process while being processed. It is only necessary to drill the core hole, that is, the mounting hole 81, according to the normal processing of the PCB after the copper sidewall of the PCB is sun-baked, and leave the predetermined short-circuit prevention positions 831, 832 and 833, and the processing is simple, without additional material and process cost increase. . It should be understood that a short-circuit prevention position is respectively disposed between adjacent ends of the respective conductive copper sinks to prevent them from simultaneously contacting the two conductive copper sinks. It should be understood that the conductive copper sink in the present embodiment is not limited to three, and more than three may be used. The shape of the specific mounting hole is not limited to a circular shape, and other shapes such as an ellipse and a square may be used, and the specific conditions may be specific. And set.

Example 9:

In this embodiment, the mounting hole is circular and has two conductive copper sinks as an example for description. And one of the conductive sinking copper is outside the mounting hole and the other is inside the mounting hole. As shown in FIG. 13, the core mounting hole includes a mounting hole 91, two conductive copper sinks 921 and 922, and the conductive copper sink 921 and the conductive copper sink 922 have different potentials; since the conductive copper sink 921 is outside the mounting hole 91 In the middle, there is an insulating PCB board material, the magnetic core 94 cannot contact the conductive copper sink 921, and the conductive copper sink 922 is inside the mounting hole 91, and the magnetic core 94 can be in contact therewith. As one is outside, one Therefore, the magnetic core 94 can only be in contact with the conductive copper sink 922, and no short circuit occurs. It should be understood that the conductive copper sink in this embodiment is not limited to two, three or more, and preferably, only one of the conductive copper sinks is disposed inside the mounting hole, and the rest of the mounting holes are provided on the outside of the mounting hole. The material of the board itself is isolated, and the shape of the specific mounting hole is not limited to a circular shape, and other shapes such as an ellipse and a square may be used, and the specific shape may be determined according to specific conditions.

Example 10:

In this embodiment, the mounting hole is circular and has two conductive copper sinks as an example for description. And two conductive copper sinks are on the outside of the mounting hole. As shown in FIG. 14, the core mounting hole includes a mounting hole 101, two conductive copper sinks 1021 and 1022, and the conductive copper sink 1021 and the conductive copper sink 1022 have different potentials; since the conductive copper sinks 1021 and 1022 are in the mounting hole 91 The outer side has an insulating PCB material in the middle, and the magnetic core 94 cannot contact the conductive copper sinks 1021 and 1022 without short circuit. It should be understood that the conductive copper sink in this embodiment is not limited to two, three or more. Preferably, the conductive copper is disposed outside the mounting hole, and each conductive copper is insulated by the material of the PCB itself. That is, the shape of the specific mounting hole is not limited to a circular shape, and other shapes such as an ellipse and a square may be used, and the specific shape may be determined according to specific conditions.

It is to be noted that the present invention also provides a transformer comprising the PCB board and the magnetic core of all of the above embodiments, the magnetic core passing through the core mounting hole of the PCB board.

The above is a further detailed description of the present invention in connection with the specific embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Industrial applicability

The embodiment provides a PCB board and a transformer having a core mounting hole, and the PCB board includes At least one magnetic core mounting hole; at least one of the magnetic core mounting holes includes a mounting hole and at least two conductive copper sinks; the inner side of the mounting hole includes at least one insulating segment and/or at least one conductive copper sink; When the magnetic core corresponding to the mounting hole passes through the mounting hole, the magnetic core is in contact with one of the insulating segment and/or one of the conductive copper sinks; thus, the embodiment makes the magnetic core contact with at most one of the conductive copper sinks, thereby preventing The short circuit occurs when the magnetic core contacts different potential conductive copper sinks. The core mounting hole is simple to process and does not require additional processing of the magnetic core, which has a cost advantage.

Claims

A PCB board having a magnetic core mounting hole, comprising at least one magnetic core mounting hole; at least one of the magnetic core mounting holes includes a mounting hole and at least two conductive copper sinks; the inner side of the mounting hole includes At least one insulating segment and/or at least one conductive copper sink; one of the magnetic core and the insulating segment and/or the conductive copper sink when the magnetic core corresponding to the mounting hole passes through the mounting hole contact.
The PCB board according to claim 1, wherein said insulating segment includes a short-circuit prevention position when said mounting hole inner side includes at least one short-circuit proofing position and at least two conductive copper sinks; at any two adjacent conductive sinks An anti-short-circuiting position is disposed between the copper; the anti-short-proof position protrudes toward the hole of the mounting hole; the anti-short-circuiting position protrudes to a height greater than a surface of the conductive copper sink.
The PCB board according to claim 2, wherein when the inside of the mounting hole includes two conductive copper sinks, and the mounting holes have a circular shape, both ends of the two conductive copper sinks are on the same semicircular side, When the distance between the two conductive copper-plated ends is small, the short-circuit prevention position is set; or when one of the two copper sinks exceeds the semi-circular side, an anti-short circuit is disposed between the adjacent ends of the two conductive copper sinks.
The PCB board according to claim 2, wherein when the inside of the mounting hole includes two conductive copper sinks, and the mounting hole has a square shape, two conductive copper ends are present on the same side or adjacent to each other When there are two ends of the conductive copper sink on the side, a short-circuit prevention position is provided between the adjacent ends of the two conductive copper sinks.
The PCB board according to claim 2, wherein when the inside of the mounting hole includes two conductive copper sinks, and the shape of the mounting hole is an ellipse, both ends of the two conductive copper sinks are on the same long axis or short axis. On the side, a short-circuit prevention position is provided between the two conductive copper-plated ends; or when one of the two conductive copper sinks exceeds the long-axis or the short-axis side, respectively, between the adjacent ends of the two conductive copper sinks Set the anti-short circuit position.
The PCB board according to claim 2, wherein when the inside of the mounting hole includes at least When three conductive copper sinks, anti-short-circuit positions are respectively arranged between adjacent ends of the respective conductive copper sinks.
The PCB board according to any one of claims 2 to 6, wherein the short circuit prevention bit is formed by cutting the PCB board itself.
The PCB board according to any one of claims 1 to 6, wherein when the inner side of the mounting hole includes a conductive copper sink, the surface of the conductive copper sink protrudes from the surface of the hole of the mounting hole or is concave The surface of the hole of the mounting hole is located.
The PCB board according to claim 1, wherein said insulating segment comprises a mounting hole wall when said mounting hole includes at most one conductive copper sink; and other conductive sinking copper is disposed outside said mounting hole; The conductive copper sink is insulated by the PCB material.
The PCB board according to claim 9, wherein when the core mounting hole comprises a mounting hole and two conductive sinking copper, a conductive copper sink is disposed on the inner hole wall of the mounting hole; and another conductive copper sink Provided on the outer side of the mounting hole; or two conductive copper sinks are disposed outside the mounting hole, and the two hole walls are insulated by the PCB material.
A transformer comprising the PCB board and the magnetic core according to any one of claims 1 to 10, the magnetic core passing through a core mounting hole of the PCB board.