Electronic device and integrated inductor thereof

Abstract

The present invention discloses an electronic device and an integrated inductor thereof, and relates to the technical field of electronic devices. The integrated inductor comprises a circuit board, a magnetic core and a winding. The circuit board has a via conduction hole and an inductor connection pad assembly; the magnetic core is arranged on the circuit board; the winding is sleeved on the magnetic core, and the winding comprises a first winding module and a second winding module, the first winding module is located on the front side of the circuit board, and the second winding module is located on the back side of the circuit board, and the first winding module and the second winding module are both welded with via conduction holes to electrically connect the first winding module and the second winding module, and the current input end and the current output end of the winding are welded to the inductor connection pad assembly to electrically connect to the circuit board. Compared with the related art, when the integrated inductor is applied to the electronic device, it makes full use of the space commonly present on the back side of the circuit board when the circuit board is installed, and can effectively reduce the installation space required for the winding on the front side of the circuit board.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic devices, and more specifically, to an integrated inductor. In addition, the present invention also relates to an electronic device comprising the integrated inductor. Background Art

[0002] An inductor is an electromagnetic induction component, which is made of an insulated wire wound on a winding bracket or an iron core with a certain number of turns. This coil is called an inductor coil or inductor. According to the principle of electromagnetic induction, when the coil and the magnetic field have relative motion, or the coil generates an alternating magnetic field through an alternating current, an induced voltage will be generated to resist the change of the original magnetic field, and this characteristic of suppressing current changes is called inductance.

[0003] Traditional inductors usually consist of the following five parts: magnetic core, winding, fixing, protection or supporting accessories, external connection structure, and electrical safety components.

[0004] Among them, the winding is generally made by winding enameled wire or Litz wire on a magnetic ring. Its basic insulation is met by the coating or insulating paint on the surface of the wire. The manufacturing processes involved include winding, bending, and shaping.

[0005] Fixing, protecting or supporting accessories refer to structures that limit the magnetic core or coil and protect vulnerable parts. For example, the coil and the magnetic core are isolated by using glue or plastic parts to prevent the friction between the two and cause the insulation layer of the coil to be damaged, or a shell is added to prevent damage to the main body of the magnetic part.

[0006] The external connection structure refers to the electrical connection between the inductor and the outside world, which is generally made of pins that can be plugged into a circuit board and then welded to achieve a conductive connection.

[0007] Electrical safety components refer to sub-parts or structural components that play an insulating role, generally referring to polyimide film, Nomi paper, etc. When the safety distance between internal components is not enough, additional insulation protection is provided to ensure the normal function of the inductor.

[0008] However, after the traditional inductor is set on the circuit board, the space required for the circuit board installation is large, and it is difficult to layout and use in many environments with limited space.

[0009] In summary, how to reduce the installation space required for a circuit board provided with an inductor is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0010] In view of this, an object of the present invention is to provide an integrated inductor, which has a smaller installation space than the related art.

[0011] Another object of the present invention is to provide an electronic device comprising the above integrated inductor.

[0012] In order to achieve the above object, the present invention provides the following technical solutions:

[0013] An integrated inductor, comprising:

[0014] A circuit board having a via hole and an inductor connection pad component;

[0015] A magnetic core, which is arranged on the circuit board;

[0016] A winding is sleeved on the magnetic core, and the winding includes a first winding module and a second winding module. The first winding module is located on the front side of the circuit board, and the second winding module is located on the back side of the circuit board. The first winding module and the second winding module are both welded with the Via conducting hole to electrically connect the first winding module and the second winding module. The current input end and the current output end of the winding are welded to the inductor connecting pad assembly to be electrically connected to the circuit board.

[0017] Preferably, the first winding module and the second winding module each include a plurality of copper sheets, and the plurality of copper sheets are stacked on the circuit board;

[0018] The copper sheet has an input end and an output end. The output end of one of the copper sheets is electrically connected to the input end of another copper sheet so as to connect the copper sheets in series. The remaining input end of the copper sheets in series is the current input end, and the remaining output end is the current output end.

[0019] Preferably, the magnetic core is a hollow structure, and the peripheral wall of the magnetic core has a first plug-in through hole, the winding is sleeved inside the magnetic core, the input end and the output end are inserted in or pass through the first plug-in through hole, and are welded to the inductor connecting pad assembly.

[0020] Preferably, the peripheral wall of the magnetic core has a second plug-in through hole, and the plurality of copper sheets each have a heat dissipation end, and the heat dissipation end passes through the second plug-in through hole and is soldered to the mounting pad of the circuit board.

[0021] Preferably, the plurality of copper sheets are annular structures with a cutout, and the two ends of the copper sheet surrounding the cutout are the input end and the output end, respectively, and the heat dissipation end is located on a side of the copper sheet opposite to the cutout.

[0022] Preferably, among the plurality of copper sheets connected in series, the adjacent electrically connected input ends and the output ends are electrically connected to the same pad of the circuit board.

[0023] Preferably, the magnetic core includes an E-type magnetic core and an I-type magnetic core, and the circuit board has a magnetic core mounting hole;

[0024] The E-shaped magnetic core comprises a first connecting portion, a second connecting portion, a third connecting portion and a fourth connecting portion, wherein the second connecting portion and the fourth connecting portion are arranged opposite to each other, the third connecting portion is located between the second connecting portion and the fourth connecting portion, and one end of the second connecting portion, the third connecting portion and the fourth connecting portion is connected to the first connecting portion, and the other end passes through the magnetic core mounting hole;

[0025] The I-type magnetic core is arranged opposite to the E-type magnetic core and connected to the second connecting portion, the third connecting portion and the fourth connecting portion;

[0026] The copper sheet is sleeved on the inner sides of the second connecting part and the fourth connecting part, and sleeved on the outer side of the third connecting part;

[0027] The first plug-in through hole is provided between the first end of the second connecting portion and the first end of the fourth connecting portion;

[0028] The second plugging through hole is provided between the second end of the second connecting portion and the second end of the fourth connecting portion.

[0029] Preferably, the number of the copper sheets in the first winding module and the second winding module is two;

[0030] In the first winding module and the second winding module, a piece of the copper sheet close to the circuit board is in a d-shape, and a piece of the copper sheet far from the circuit board is in a q-shape;

[0031] The inductor connection pad assembly comprises a first pad and a second pad located on the front side of the circuit board, a third pad and a fourth pad located on the back side of the circuit board, and the front side and the back side of the circuit board each have two mounting pads;

[0032] The first pad, the second pad, and the two mounting pads on the front side of the circuit board are sequentially arranged in a clockwise direction around the magnetic core mounting hole, and the via conductive hole is located in the angle region between the first pad and the second pad; the third pad, the fourth pad, and the two mounting pads on the back side of the circuit board are sequentially arranged in a counterclockwise direction around the magnetic core mounting hole, and the via conductive hole is located in the angle region between the third pad and the fourth pad; and the first pad, the second pad, the third pad, and the fourth pad are all located on the first side of the magnetic core, and the mounting pad is located on the second side of the magnetic core;

[0033] In the first winding module, the input end of the d-type copper sheet is welded to the first pad, the output end of the d-type copper sheet and the input end of the q-type copper sheet are both welded to the second pad, the output end of the q-type copper sheet is welded to the Via through hole, the heat dissipation end of the d-type copper sheet is welded to one of the mounting pads on the front side of the circuit board, and the heat dissipation end of the q-type copper sheet is welded to another mounting pad on the front side of the circuit board;

[0034] In the second winding module, the input end of the q-type copper sheet is welded to the Via through-hole, the output end of the q-type copper sheet and the input end of the d-type copper sheet are both welded to the fourth welding pad, and the output end of the d-type copper sheet is welded to the third welding pad.

[0035] Preferably, the surfaces where the second connection portion and the fourth connection portion are close to each other are arc-shaped surfaces, and the second connection portion is a cylindrical structure.

[0036] An electronic device comprises the integrated inductor described in any one of the above items.

[0037] In the integrated inductor provided by the present invention, the magnetic core passes through the circuit board and is fixedly connected to the circuit board by bonding or the like, and the magnetic core can adopt a frame structure with four supporting legs, and the circuit board is also provided with a Via conductive hole and an inductor connection pad assembly, which are matched, and the winding is divided into two parts, namely a first winding module and a second winding module, the first winding module is arranged on the front side of the circuit board, and the second winding module is arranged on the back side of the circuit board, and at least one end of the first winding module is welded to the end of the Via conductive hole located on the front side of the circuit board, and at least one end of the second winding module is welded to the Via conductive hole located on the front side of the circuit board. The through hole is located at one end of the back side of the circuit board, so that the first winding module and the second winding module can be electrically connected to form a complete winding. The winding has a current input end and a current output end, and the current input end and the current output end are welded to the inductor connection pad assembly so that the winding can be connected to the circuit of the circuit board, and the winding and the magnetic core are mutually nested. Then, the integrated inductor can realize inductance. Compared with the related technology, when the integrated inductor is applied to electronic equipment, it makes full use of the space commonly available on the back side of the circuit board when the circuit board is installed, and can effectively reduce the installation space required for the winding on the front side of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0039] Figure 1 A schematic diagram of the structure of a specific embodiment provided by the present invention;

[0040] Figure 2 An exploded view of a specific embodiment provided by the present invention;

[0041] Figure 3 An exploded diagram of a winding according to a specific embodiment of the present invention;

[0042] Figure 4 A top view of the front side of a circuit board according to a specific embodiment of the present invention;

[0043] Figure 5 A projection diagram of the back side of a circuit board according to a specific embodiment of the present invention, viewed from above;

[0044] Figure 6 A circuit diagram of a winding according to a specific embodiment of the present invention;

[0045] Figure 7 A schematic structural diagram of a magnetic core according to a specific embodiment of the present invention;

[0046] Figure 8 A schematic structural diagram of an E-type magnetic core according to a specific embodiment of the present invention;

[0047] Fig. 9 It is a schematic structural diagram of an I-type magnetic core according to a specific embodiment of the present invention.

[0048] Reference numerals:

[0049] 1-circuit board; 11-via conduction hole; 12-inductor connection pad assembly; 121-first pad; 122-second pad; 123-third pad; 124-fourth pad; 13-core mounting hole; 14-mounting pad;

[0050] 2-magnetic core; 21-E-type magnetic core; 211-first connecting portion; 212-second connecting portion; 213-third connecting portion; 214-fourth connecting portion; 215-first plug-in through hole; 216-second plug-in through hole; 22-I-type magnetic core;

[0051] 3-winding; 31-first winding module; 32-second winding module; 301-copper sheet; 3011-input end; 3012-output end; 3013-heat dissipation end. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] The core of the present invention is to provide an integrated inductor, which has a smaller installation space than the related art. Another core of the present invention is to provide an electronic device including the integrated inductor.

[0054] Please refer to Figure 1 The present invention provides an integrated inductor, including a circuit board 1, a magnetic core 2 and a winding 3. The circuit board 1 has a via through hole 11 and an inductor connection pad assembly 12; the magnetic core 2 is arranged on the circuit board 1; the winding 3 is sleeved on the magnetic core 2, and the winding 3 includes a first winding module 31 and a second winding module 32, the first winding module 31 is located on the front of the circuit board 1, and the second winding module 32 is located on the back of the circuit board 1. The first winding module 31 and the second winding module 32 are both welded with the via through hole 11, so that the first winding module 31 and the second winding module 32 are electrically connected, and the current input end and the current output end of the winding 3 are welded to the inductor connection pad assembly 12, so as to be electrically connected to the circuit board 1.

[0055] like Figure 2 As shown, the magnetic core 2 passes through the circuit board 1 and is fixedly connected to the circuit board 1 by bonding or the like, and the magnetic core 2 can adopt a frame structure with four supporting legs, and the circuit board 1 is also provided with a Via conductive hole 11 and an inductor connection pad assembly 12, and the winding 3 is matched with each other, namely, a first winding module 31 and a second winding module 32, the first winding module 31 is arranged on the front side of the circuit board 1, and the second winding module 32 is arranged on the back side of the circuit board 1, and at least one end of the first winding module 31 is welded to one end of the Via conductive hole 11 located on the front side of the circuit board 1, and at least one end of the second winding module 32 is welded to the Via conductive hole 11 located on the front side of the circuit board 1. The through hole 11 is located at one end of the back side of the circuit board 1, so that the first winding module 31 and the second winding module 32 can be electrically connected to form a complete winding 3. The winding 3 has a current input end and a current output end, and the current input end and the current output end are welded to the inductor connection pad assembly 12, so that the winding 3 can be connected to the circuit of the circuit board 1, and the winding 3 and the magnetic core 2 are mutually connected, then the integrated inductor can realize the inductance. Compared with the related art, when the integrated inductor is applied to electronic equipment, it makes full use of the space commonly available on the back side of the circuit board 1 when the circuit board 1 is installed, and can effectively reduce the installation space required for the winding 3 on the front side of the circuit board 1.

[0056] It should be noted that the type of winding 3 is not limited as long as the above functions can be achieved. For example, the first winding module 31 and the second winding module 32 can both adopt two enameled wire winding 3 modules; it should also be noted that the number of Via conductive holes 11 and the arrangement of the input and output ends of the winding 3 are not limited, as long as an end for electrically connecting the circuit board 1 is reserved and the first winding module 31 and the second winding module 32 can be electrically connected. For example, the number of Via conductive holes 11 is two, and the first winding module 31 includes four pieces of gold The second winding module 32 includes two metal sheets. One end of the first metal sheet in the first winding module 31 is the above-mentioned current input end and is welded to a pad on the circuit board 1 for supplying power to the winding 3. The other end of the first metal sheet in the first winding module 31 is welded to one end of the second metal sheet in the first winding module 31. The other end of the second metal sheet in the first winding module 31 is welded to one end of the first Via conductive hole 11 located at the front end of the circuit board 1. The first Via conductive hole 11 is located at one end of the first metal sheet in the second winding module 32. The hole 11 is located at one end of the back side of the circuit board 1, the other end of the first metal sheet in the second winding module 32 is welded to one end of the second metal sheet in the second winding module 32, and the other end of the second metal sheet in the second winding module 32 is welded to the second Via conductive hole 11 is located at one end of the back side of the circuit board 1, and one end of the third metal sheet in the first winding module 31 is welded to the second Via conductive hole 11 is located at one end of the front side of the circuit board 1, and the other end of the third metal sheet in the first winding module 31 is welded to the fourth metal sheet in the first winding module 31 One end, the other end of the fourth metal sheet in the first winding module 31 is the above-mentioned current output end, and is welded to another pad on the circuit board 1 for supplying power to the winding 3, so that when the current flows through the winding 3, it will flow along the first metal sheet of the first winding module 31, the second metal sheet of the first winding module 31, the first metal sheet of the second winding module 32, the second metal sheet of the second winding module 32, the third metal sheet of the first winding module 31, and the fourth metal sheet of the first winding module 31 in sequence to form a complete circuit.

[0057] On the basis of the above embodiments, the first winding module 31 and the second winding module 32 each include a plurality of copper sheets 301, and the plurality of copper sheets 301 are stacked on the circuit board 1; the copper sheets 301 have an input end 3011 and an output end 3012, and the output end 3012 of one of the plurality of copper sheets 301 is electrically connected to the input end 3011 of another copper sheet 301, so as to connect the plurality of copper sheets 301 in series, and the remaining input end 3011 of the plurality of copper sheets 301 in series is a current input end, and the remaining output end 3012 is a current output end.

[0058] like Figures 1 to 3 , Figure 6As shown, in the first winding module 31 and the second winding module 32, several semi-annular copper sheets 301 are stacked, and each copper sheet 301 has two electrical connection ends, one of which is the above-mentioned input end 3011, and the other is the above-mentioned output end 3012. Several copper sheets 301 in the first winding module 31 and the second winding module 32 are connected in series, that is, the output end 3012 of one copper sheet 301 is electrically connected to the input end 3011 of another copper sheet 301, for example, the electrical connection is achieved by welding on the same pad or Via conductive hole 11 on the circuit board 1 or by direct welding, and then the free ends of several copper sheets 301 are connected in series and welded to the pad on the circuit board 1 for supplying power to the winding 3, so as to reduce the production difficulty of the integrated inductor, and the resistivity is low.

[0059] Based on the above embodiment, the magnetic core 2 is a hollow structure, and the peripheral wall of the magnetic core 2 has a first plug-in hole 215, the winding 3 is sleeved inside the magnetic core 2, the input end 3011 and the output end 3012 are inserted in or pass through the first plug-in hole 215, and are welded to the inductor connecting pad assembly 12.

[0060] like Figure 1 , Figure 7 and Figure 8 As shown, the magnetic core 2 is a hollow structure, and a rectangular or trapezoidal through hole is opened on the lower left side wall of the magnetic core 2 as a first plug-in through hole 215 for plugging the input end 3011 and the output end 3012 of the copper sheet 301. It should be noted that the number and arrangement of the first plug-in through holes 215 are not limited as long as the above functions can be met. For example, in some specific embodiments, the number of the first plug-in through holes 215 is two, one first plug-in through hole 215 is located on the front side of the circuit board 1 to plug the input end 3011 and the output end 3012 of the copper sheet 301 in the first winding module 31, and the other first plug-in through hole 215 is located on the front side of the circuit board 1 to plug the input end 3011 and the output end 3012 of the copper sheet 301 in the first winding module 31. A plug-in through hole 215 is located on the back side of the circuit board 1 to plug in the input end 3011 and the output end 3012 of the copper sheet 301 in the second winding module 32. In other specific embodiments, the number of the first plug-in through hole 215 is one, and a partial hole section of the first plug-in through hole 215 is located on the front side of the circuit board 1 to plug in the input end 3011 and the output end 3012 of the copper sheet 301 in the first winding module 31. A partial hole section of the first plug-in through hole 215 is located on the back side of the circuit board 1 to plug in the input end 3011 and the output end 3012 of the copper sheet 301 in the second winding module 32.

[0061] Correspondingly, in the first winding module 31 and the second winding module 32, the copper sheet 301 closest to the circuit board 1 is a flat structure, while the input end 3011 and the output end 3012 of the other copper sheets 301 are stepped with their own semi-annular main body, so that while the main bodies of each copper sheet 301 can be stacked on each other, the input end 3011 and the output end 3012 of each copper sheet 301 can abut the inductive connecting pad assembly 12 of the circuit board 1, and then can be soldered to the inductive connecting pad assembly 12 of the circuit board 1.

[0062] Based on the above embodiment, the peripheral wall of the magnetic core 2 has a second plug-in through hole 216 , and the copper sheets 301 each have a heat dissipation end 3013 , which passes through the second plug-in through hole 216 and is soldered to the mounting pad 14 of the circuit board 1 .

[0063] A through hole in a rectangular or trapezoidal shape is provided on the upper right side wall of the magnetic core 2 as the second plug-in through hole 216 for plugging in the heat dissipation end 3013 of the copper sheet 301. It should be noted that the number and arrangement of the second plug-in through holes 216 are not limited as long as the above functions can be met. For example, in some specific embodiments, the number of the second plug-in through holes 216 is two, one second plug-in through hole 216 is located on the front side of the circuit board 1 to plug in the heat dissipation end 3013 of the copper sheet 301 in the first winding module 31, and the other first plug-in through hole 216 is located on the front side of the circuit board 1 to plug in the heat dissipation end 3013 of the copper sheet 301 in the first winding module 31. The connecting hole 215 is located on the back side of the circuit board 1 to plug in the heat dissipation end 3013 of the copper sheet 301 in the second winding module 32. In other specific embodiments, the number of the second plug-in through hole 216 is one, and a partial hole section of the second plug-in through hole 216 is located on the front side of the circuit board 1 to plug in the heat dissipation end 3013 of the copper sheet 301 in the first winding module 31, and a partial hole section of the second plug-in through hole 216 is located on the back side of the circuit board 1 to plug in the heat dissipation end 3013 of the copper sheet 301 in the second winding module 32.

[0064] Correspondingly, each copper sheet 301 in the first winding module 31 and the second winding module 32 has a heat dissipation end 3013 that does not participate in current conduction. For example, the copper sheet 301 can adopt a Y-shaped structure, and in the first winding module 31 and the second winding module 32, the copper sheet 301 closest to the circuit board 1 is a flat plate structure, and the heat dissipation ends 3013 of other copper sheets 301 are also stepped with their semi-annular main bodies, so that while the main bodies of each copper sheet 301 can be stacked on each other, the heat dissipation ends 3013 of each copper sheet 301 can abut against the corresponding mounting pads 14 of the circuit board 1, and then can be soldered to the corresponding mounting pads 14 of the circuit board 1; the heat dissipation ends 3013 extend out of the outside of the magnetic core 2 through the second plug-in through hole 216. , to weld the mounting pad 14, the mounting pad 14 is insulated from the circuit board 1 for supplying power to the winding 3, and each mounting pad 14 is also insulated, the number of the mounting pads 14 is equal to the number of the copper sheets 301, the heat dissipation end 3013 of each copper sheet 301 is welded to the corresponding mounting pad 14, that is, a plurality of heat dissipation ends 3013 correspond to the mounting pad 14 one by one, the integrated inductor is stably connected to the circuit board 1 through the heat dissipation end 3013, the input end 3011, and the output end 3012 of each copper sheet 301, so that each copper sheet 301 can be accurately positioned, so that the insulation structure required for the winding 3 can be reduced while improving the heat dissipation performance, thereby reducing the production difficulty and production cost of the integrated inductor.

[0065] Based on the above embodiments, the plurality of copper sheets 301 are annular structures with cutouts, the two ends of the cutouts formed in the copper sheet 301 are the input end 3011 and the output end 3012, respectively, and the heat dissipation end 3013 is located on the side of the copper sheet 301 opposite to the cutout.

[0066] like Figure 2 and Figure 3 As shown, the main body of the copper sheet 301 adopts a ring structure with a cutout reserved on the left side, and the two ends of the ring structure are respectively an input end 3011 and an output end 3012, and the middle ring section on the right side of the ring structure has a heat dissipation end 3013 extending toward the outside of the ring structure. With this arrangement, the structure of the copper sheet 301 is simple and easy to layout.

[0067] On the basis of the above embodiment, among the plurality of copper sheets 301 connected in series, the adjacent electrically connected input ends 3011 and output ends 3012 are electrically connected to the same pad of the circuit board 1 .

[0068] The output end 3012 of a copper sheet 301 is electrically connected to the input end 3011 of another copper sheet 301 through the same pad soldered on the circuit board 1, and several through edges are connected in series using the above-mentioned connection method. With this arrangement, the layout of the integrated inductor is compact, which is conducive to miniaturized design.

[0069] On the basis of the above embodiment, the magnetic core 2 includes an E-type magnetic core 21 and an I-type magnetic core 22, and the circuit board 1 has a magnetic core mounting hole 13; the E-type magnetic core 21 includes a first connecting portion 211, a second connecting portion 212, a third connecting portion 213 and a fourth connecting portion 214, the second connecting portion 212 and the fourth connecting portion 214 are arranged opposite to each other, the third connecting portion 213 is located between the second connecting portion 212 and the fourth connecting portion 214, and one end of the second connecting portion 212, the third connecting portion 213 and the fourth connecting portion 214 is connected to the first connecting portion 211, and the other end of the second connecting portion 212, the third connecting portion 213 and the fourth connecting portion 214 is connected to the first connecting portion 211, and the other end of the second connecting portion 212, the third connecting portion 213 and the fourth connecting portion 214 is connected to the first connecting portion 211. One end passes through the magnetic core mounting hole 13; the I-type magnetic core 22 is arranged opposite to the E-type magnetic core 21, and is connected to the second connecting part 212, the third connecting part 213 and the fourth connecting part 214; the copper sheet 301 is sleeved on the inner side of the second connecting part 212 and the fourth connecting part 214, and sleeved on the outer side of the third connecting part 213; a first plug-in through hole 215 is provided between the first end of the second connecting part 212 and the first end of the fourth connecting part 214; a second plug-in through hole 216 is provided between the second end of the second connecting part 212 and the second end of the fourth connecting part 214.

[0070] like Figures 7 to 9 As shown, the second connection portion 212 on the left side of the E-type magnetic core 21 and the fourth connection portion 214 on the right side are arranged oppositely, the third connection portion 213 is located between the second connection portion 212 and the fourth connection portion 214, and one end of the second connection portion 212, the third connection portion 213 and the fourth connection portion 214 is fixedly connected to the first connection portion 211, and matched, as shown in FIG. Figure 2 , Figure 4 and Figure 5 As shown, three core mounting holes 13 are opened on the circuit board 1. The core mounting holes 13 can be round holes or square holes, etc. The free ends of the second connecting part 212, the third connecting part 213 and the fourth connecting part 214 pass through the corresponding core mounting holes 13. At the same time, the first connecting part 211 is located on the front side of the circuit board 1.

[0071] The I-shaped magnetic core 22 is located on one side of the back side of the circuit board 1 , abuts against and is fixedly connected to the free ends of the second connection portion 212 , the third connection portion 213 and the fourth connection portion 214 , and is fixedly connected thereto by bonding or screws.

[0072] The lower left end of the second connection portion 212 and the lower left end of the fourth connection portion 214 together form a first plugging through hole 215 , and the upper right end of the second connection portion 212 and the upper right end of the fourth connection portion 214 together form a second plugging through hole 216 .

[0073] The specific way in which the magnetic core 2 and the winding 3 cooperate is as follows: the winding 3 is nested inside the second connection portion 212 and the fourth connection portion 214, and the third connection portion 213 passes through the middle hole of the winding 3 to improve the performance of the integrated inductor.

[0074] On the basis of the above embodiment, the number of copper sheets 301 in the first winding module 31 and the second winding module 32 is two; in the first winding module 31 and the second winding module 32, a copper sheet 301 close to the circuit board 1 is d-shaped, and a copper sheet 301 away from the circuit board 1 is q-shaped; the inductor connection pad assembly 12 includes a first pad 121 and a second pad 122 located on the front side of the circuit board 1, a third pad 123 and a fourth pad 124 located on the back side of the circuit board 1, and the front and back sides of the circuit board 1 have Two mounting pads 14; the first pad 121, the second pad 122, and the two mounting pads 14 on the front side of the circuit board 1 are arranged in sequence in a clockwise direction around the magnetic core mounting hole 13, and the via hole 11 is located in the angle area between the first pad 121 and the second pad 122; the third pad 123, the fourth pad 124, and the two mounting pads 14 on the back side of the circuit board 1 are arranged in sequence in a counterclockwise direction around the magnetic core mounting hole 13, and the via hole 11 is located between the third pad 123 and the fourth pad 124 corner area; and the first pad 121, the second pad 122, the third pad 123 and the fourth pad 124 are all located on the first side of the magnetic core 2, and the mounting pad 14 is located on the second side of the magnetic core 2; in the first winding module 31, the input end 3011 of the d-type copper sheet 301 is welded to the first pad 121, the output end 3012 of the d-type copper sheet 301 and the input end 3011 of the q-type copper sheet 301 are both welded to the second pad 122, the output end 3012 of the q-type copper sheet 301 is welded to the Via conductive hole 11, and the d-type copper sheet The heat dissipation end 3013 of the q-type copper sheet 301 is welded to a mounting pad 14 on the front side of the circuit board 1, and the heat dissipation end 3013 of the q-type copper sheet 301 is welded to another mounting pad 14 on the front side of the circuit board 1; in the second winding module 32, the input end 3011 of the q-type copper sheet 301 is welded to the Via conductive hole 11, the output end 3012 of the q-type copper sheet 301 and the input end 3011 of the d-type copper sheet 301 are both welded to the fourth pad 124, and the output end 3012 of the d-type copper sheet 301 is welded to the third pad 123. It can be understood that the above-mentioned "clockwise direction" and "counterclockwise direction" are directions when looking down at the circuit board 1.

[0075] like Figure 2 , Figure 3 and Figure 6 As shown, the first winding module 31 is located above the circuit board 1, and in the first winding module 31, the upper part is the inverted q-shaped copper sheet 301, and the lower part is the inverted d-shaped copper sheet 301, and the cutouts of the two copper sheets 301 in the first winding module 31 are both located on the left, and the heat dissipation ends 3013 of the two copper sheets 301 in the first winding module 31 are both located on the right, and the heat dissipation ends 3013 of the two copper sheets 301 in the first winding module 31 are staggered.

[0076] Matching, such as Figure 4 As shown, the two mounting pads 14 on the front side of the circuit board 1 are both located above the magnetic core mounting hole 13. Figure 1 As shown, the heat dissipation ends 3013 of the two copper sheets 301 in the first winding module 31 pass through the second plug-in through hole 216 at the upper right of the magnetic core 2. Furthermore, in the first winding module 31, the heat dissipation end 3013 of the D-type copper sheet 301 is welded to the mounting pad 14 at the upper left of the circuit board 1, and the heat dissipation end 3013 of the Q-type copper sheet 301 is welded to the mounting pad 14 at the upper right of the circuit board 1.

[0077] Matching, such as Figure 4 As shown, the first solder pad 121 and the second solder pad 122 on the front side of the circuit board 1 are both located below the magnetic core mounting hole 13, and the first solder pad 121 is located at the lower right of the magnetic core mounting hole 13, and the second solder pad 122 is located at the lower left of the magnetic core mounting hole 13, as shown in FIG. Figure 1 As shown, the input end 3011 and the output end 3012 of the two copper sheets 301 in the first winding module 31 are inserted into the first plug-in through hole 215 at the lower left of the magnetic core 2, or pass through the first plug-in through hole 215 at the lower left of the magnetic core 2, and then, as shown in FIG. Figure 6 As shown, the input end a of the d-type copper sheet 301 in the first winding module 31 is welded to the first soldering pad 121 so that current can be input to the winding 3 through the circuit board 1, and the output end b of the d-type copper sheet 301 in the first winding module 31 and the input end c of the q-type copper sheet 301 in the first winding module 31 are both welded to the second soldering pad 122, so that the d-type copper sheet 301 in the first winding module 31 can be electrically connected to the q-type copper sheet 301 in the first winding module 31 through the second soldering pad 122, and the input end d of the q-type copper sheet 301 in the first winding module 31 is welded to the end of the Via through-hole 11 located on the front side of the circuit board 1, so as to be able to electrically connect the components welded to the end of the Via through-hole 11 located on the back side of the circuit board 1.

[0078] Similarly, if Figure 2 , Figure 3 and Figure 6 As shown, the second winding module 32 is located below the circuit board 1, and in the second winding module 32, the upper part is the inverted d-shaped copper sheet 301, and the lower part is the inverted q-shaped copper sheet 301, and the cutouts of the two copper sheets 301 in the second winding module 32 are both located on the left, and the heat dissipation ends 3013 of the two copper sheets 301 in the second winding module 32 are both located on the right, and the heat dissipation ends 3013 of the two copper sheets 301 in the second winding module 32 are staggered.

[0079] Matching, such as Figure 5 As shown, the two mounting pads 15 on the back side of the circuit board 1 are both located above the magnetic core mounting hole 13, referring to Figure 1In the orientation shown, the heat dissipation ends 3013 of the two copper sheets 301 in the second winding module 32 pass through the second plug-in through hole 216 at the upper right of the magnetic core 2. Furthermore, in the second winding module 32, the heat dissipation end 3013 of the D-type copper sheet 301 is welded to the mounting pad 15 at the upper right of the circuit board 1, and the heat dissipation end 3013 of the Q-type copper sheet 301 is welded to the mounting pad 15 at the upper left of the circuit board 1.

[0080] Matching, such as Figure 5 As shown, the third pad 123 and the fourth pad 124 on the back side of the circuit board 1 are both located below the magnetic core mounting hole 13, and the third pad 123 is located at the lower left of the magnetic core mounting hole 13, and the second pad 122 is located at the lower left of the magnetic core mounting hole 13, with reference to Figure 1 In the orientation shown, the input end 3011 and the output end 3012 of the two copper sheets 301 in the second winding module 32 are inserted into the first plug-in through hole 215 at the lower left of the magnetic core 2, or pass through the first plug-in through hole 215 at the lower left of the magnetic core 2, and then, as shown in FIG. Figure 6 As shown, the input end e of the q-type copper sheet 301 in the second winding module 32 is welded to one end of the Via through hole 11 located on the back side of the circuit board 1, so as to be able to electrically connect to the input end d of the q-type copper sheet 301 in the first winding module 31, the input end f of the q-type copper sheet 301 in the second winding module 32 and the input end g of the d-type copper sheet 301 in the second winding module 32 are both welded to the fourth welding pad 124, so that the q-type copper sheet 301 in the second winding module 32 can be electrically connected to the d-type copper sheet 301 in the second winding module 32 through the fourth welding pad 124, and the input end h of the d-type copper sheet 301 in the second winding module 32 is welded to the third welding pad 123, so that the current flowing through the winding 3 can flow back to the circuit board 1, thereby connecting the winding 3 to the circuit of the circuit board 1.

[0081] On the basis of the above-mentioned embodiment, the surfaces where the second connection portion 212 and the fourth connection portion 214 are close to each other are arc-shaped surfaces, and the second connection portion 212 is a cylindrical structure.

[0082] like Figure 8 As shown, the inner surface of the second connection part 212 and the inner surface of the fourth connection part 214 are both arc-shaped surfaces, and the third connection part 213 adopts a cylindrical structure, and the center line of the cavity enclosed by the second connection part 212 and the fourth connection part 214 coincides with the center line of the third connection part 213. Correspondingly, the main structure of the copper sheet 301 is an arc-shaped semi-ring structure, so that it is sleeved inside the second connection part 212 and the fourth connection part 214 and outside the third connection part 213. With this arrangement, the integrated inductor has low loss, high anti-interference performance, and a wide power range.

[0083] In addition to the above-mentioned integrated inductor, the present invention further provides an electronic device including the integrated inductor disclosed in the above-mentioned embodiment. For the structures of other parts of the electronic device, please refer to the prior art and will not be described in detail herein.

[0084] It should be noted that the relational terms such as "first" and "second" mentioned above are merely used to distinguish one entity from other entities, and do not necessarily require or imply any actual relationship or order between these entities; the "upper surface, lower surface, top, bottom" and the directional words "upper, lower, left, right" mentioned above are all defined based on the drawings in the specification.

[0085] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0086] The electronic device and its integrated inductor provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. An integrated inductor, characterized in that: include: A circuit board (1) having a via hole (11) and an inductor connection pad component (12); A magnetic core (2), which is arranged on the circuit board (1); A winding (3) is sleeved on the magnetic core (2), the winding (3) comprising a first winding module (31) and a second winding module (32), the first winding module (31) being located on the front side of the circuit board (1), the second winding module (32) being located on the back side of the circuit board (1), the first winding module (31) and the second winding module (32) being both welded to the via conductive hole (11) so that the first winding module (31) and the second winding module (32) are electrically connected, and the current input end and the current output end of the winding (3) are welded to the inductor connection pad assembly (12) so as to be electrically connected to the circuit board (1).

2. The integrated inductor according to claim 1, characterized in that: The first winding module (31) and the second winding module (32) each comprise a plurality of copper sheets (301), wherein the plurality of copper sheets (301) are stacked on the circuit board (1); The copper sheet (301) has an input end (3011) and an output end (3012); the output end (3012) of one copper sheet (301) among the plurality of copper sheets (301) is electrically connected to the input end (3011) of another copper sheet (301) so as to connect the plurality of copper sheets (301) in series; the remaining input end (3011) of the plurality of copper sheets (301) connected in series is the current input end, and the remaining output end (3012) is the current output end.

3. The integrated inductor according to claim 2, characterized in that: The magnetic core (2) is a hollow structure, and a peripheral wall of the magnetic core (2) has a first plug-in through hole (215); the winding (3) is sleeved inside the magnetic core (2); the input end (3011) and the output end (3012) are inserted into or pass through the first plug-in through hole (215), and are welded to the inductor connection pad assembly (12).

4. The integrated inductor according to claim 3, characterized in that: The peripheral wall of the magnetic core (2) has a second plug-in through hole (216), and the plurality of copper sheets (301) each have a heat dissipation end (3013), the heat dissipation end (3013) passes through the second plug-in through hole (216) and is soldered to the mounting pad (14) of the circuit board (1).

5. The integrated inductor according to claim 4, characterized in that: The plurality of copper sheets (301) are all annular structures with a cutout, the two ends of the copper sheet (301) surrounding the cutout are respectively the input end (3011) and the output end (3012), and the heat dissipation end (3013) is located on a side of the copper sheet (301) opposite to the cutout.

6. The integrated inductor according to claim 5, characterized in that: Among the plurality of copper sheets (301) connected in series, the adjacent electrically connected input ends (3011) and output ends (3012) are electrically connected to the same soldering pad of the circuit board (1).

7. The integrated inductor according to claim 6, characterized in that: The magnetic core (2) comprises an E-type magnetic core (21) and an I-type magnetic core (22), and the circuit board (1) has a magnetic core mounting hole (13); The E-shaped magnetic core (21) comprises a first connecting portion (211), a second connecting portion (212), a third connecting portion (213) and a fourth connecting portion (214); the second connecting portion (212) and the fourth connecting portion (214) are arranged opposite to each other, the third connecting portion (213) is located between the second connecting portion (212) and the fourth connecting portion (214), and one end of the second connecting portion (212), the third connecting portion (213) and the fourth connecting portion (214) is connected to the first connecting portion (211), and the other end passes through the magnetic core mounting hole (13); The I-type magnetic core (22) is arranged opposite to the E-type magnetic core (21), and is connected to the second connecting portion (212), the third connecting portion (213), and the fourth connecting portion (214); The copper sheet (301) is sleeved on the inner sides of the second connecting portion (212) and the fourth connecting portion (214), and is sleeved on the outer side of the third connecting portion (213); The first plugging through hole (215) is provided between the first end of the second connecting portion (212) and the first end of the fourth connecting portion (214); The second plugging through hole (216) is provided between the second end of the second connecting portion (212) and the second end of the fourth connecting portion (214).

8. The integrated inductor according to claim 7, characterized in that: The number of the copper sheets (301) in the first winding module (31) and the second winding module (32) is two; In the first winding module (31) and the second winding module (32), a piece of the copper sheet (301) close to the circuit board (1) is in a d-shape, and a piece of the copper sheet (301) far from the circuit board (1) is in a q-shape; The inductive connection pad assembly (12) comprises a first pad (121) and a second pad (122) located on the front side of the circuit board (1), and a third pad (123) and a fourth pad (124) located on the back side of the circuit board (1), and the front side and the back side of the circuit board (1) each have two mounting pads (14); The first solder pad (121), the second solder pad (122), and the two mounting solder pads (14) on the front side of the circuit board (1) are sequentially arranged in a clockwise direction around the magnetic core mounting hole (13), and the via conductive hole (11) is located in the angle region between the first solder pad (121) and the second solder pad (122); the third solder pad (123), the fourth solder pad (124), and the two mounting solder pads (14) on the back side of the circuit board (1) are sequentially arranged in a counterclockwise direction around the magnetic core mounting hole (13), and the via conductive hole (11) is located in the angle region between the third solder pad (123) and the fourth solder pad (124); and the first solder pad (121), the second solder pad (122), the third solder pad (123), and the fourth solder pad (124) are all located on the first side of the magnetic core (2), and the mounting solder pad (14) is located on the second side of the magnetic core (2); In the first winding module (31), the input end (3011) of the d-type copper sheet (301) is welded to the first solder pad (121), the output end (3012) of the d-type copper sheet (301) and the input end (3011) of the q-type copper sheet (301) are both welded to the second solder pad (122), the output end (3012) of the q-type copper sheet (301) is welded to the Via conductive hole (11), the heat dissipation end (3013) of the d-type copper sheet (301) is welded to one of the mounting pads (14) on the front side of the circuit board (1), and the heat dissipation end (3013) of the q-type copper sheet (301) is welded to another of the mounting pads (14) on the front side of the circuit board (1); In the second winding module (32), the input end (3011) of the q-type copper sheet (301) is welded to the Via conductive hole (11), the output end (3012) of the q-type copper sheet (301) and the input end (3011) of the d-type copper sheet (301) are both welded to the fourth welding pad (124), and the output end (3012) of the d-type copper sheet (301) is welded to the third welding pad (123).

9. The integrated inductor according to claim 7, characterized in that: The surfaces where the second connection portion (212) and the fourth connection portion (214) are close to each other are arc-shaped surfaces, and the second connection portion (212) is a cylindrical structure.

10. An electronic device, characterized in that: The integrated inductor comprises any one of claims 1 to 9.

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