Inductor

Abstract

The utility model relates to the technical field of electronic components, in particular to an inductor. Comprising a magnetic conductive main body and an inductance coil group arranged in the magnetic conductive main body, and the top surface of the magnetic conductive main body is provided with a convex magnet structure; the magnet structure is provided with a plurality of raised magnet bonding pads, and a spacer region is arranged between every two adjacent magnet bonding pads; the magnet bonding pad is provided with a protruding bonding pad terminal. The pad size of the magnet pad is larger than the pad size of the pad terminal. Therefore, the pad terminal is designed to be convex, so that the pad terminal is directly welded during welding, the risk of insufficient welding is avoided, the welding quality is ensured, magnet residues at the pad terminal are reduced, the welding surface is effectively enlarged, and the resistance at the welding position is reduced; therefore, the whole magnet bonding pad is ensured to protrude, enough space is provided for tin beads generated when tin soldering is carried out on a board, and the influence of the tin beads on welding is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic components technical field especially relates to an inductor. BACKGROUND

[0002] The inductor is an important component in electronic devices, its main function is to store and release electric energy, and resist the change of current, when the current passes through the inductor, it will produce a magnetic field around the inductor, and this magnetic field will interact with the current. This interaction leads to the storage of electric energy in the inductor, and the inductance phenomenon, that is, the tendency to resist the change of current.

[0003] The existing inductor is mostly small electronic components, the solder pad is very important for the use of the product, which directly affects the working efficiency and service life of the product, and even threatens the safety of the whole module. The main problems of the traditional solder pad structure are as follows: 1, the solder pad terminal is covered by residual magnet, the solder pad overcurrent is not enough, which may cause the soldering surface of the solder pad to be hot, even burn the product, and directly affect the use effect; 2, the risk of false welding is prone to occur during welding; 3, there are problems such as tin beads, therefore, in order to ensure the later use of the product, it is particularly important to design a good solder pad structure. SUMMARY

[0004] The utility model discloses an inductor, which solves the problems of small overcurrent caused by residual magnet at the solder pad terminal of the existing inductor, false welding caused by the recess at the solder pad terminal and tin beads during product welding.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The utility model discloses an inductor, which solves the problems of small overcurrent caused by residual magnet at the solder pad terminal of the existing inductor, false welding caused by the recess at the solder pad terminal and tin beads during product welding.

[0007] As a further scheme of the utility model, the inductor coil group is provided with a plurality of inductor coils, the first end and the tail end of the inductor coil are respectively provided with electrode pins, and the electrode pins of the inductor coil in the magnetic body are connected with the solder pad and the solder pad terminal of the magnetic body structure.

[0008] As a further scheme of the utility model, the inductor coil group is composed of one or two or three or more groups of inductor coils wound together.

[0009] As a further scheme of the utility model, the pad size of the pad terminal is larger than the size of the electrode pin.

[0010] As a further scheme of the utility model, the surface of the magnet pad is provided with a first electroplating layer; and the surface of the pad terminal is provided with a second electroplating layer.

[0011] As a further scheme of the utility model, a third electroplating layer is arranged along the side surface of the magnet pad and the magnetically conductive main body.

[0012] As a further scheme of the utility model, the interval distance between adjacent magnet pads is greater than 0.4 mm.

[0013] As a further scheme of the utility model, the protruding height of the pad terminal is 0-0.1 mm.

[0014] As a further scheme of the utility model, the outer surface of the inductor coil group is provided with an insulation layer; the inductor coil is a flat coil; and the electrode pin is flat.

[0015] As a further scheme of the utility model, the magnetically conductive main body and the inductor coil group are integrally formed.

[0016] In the inductor of the utility model, at least one inductor coil group is arranged in the interior of the magnetically conductive main body in a parallel winding manner, the leading end and the tail end of the inductor coil are connected with the pad terminal respectively, so that the inductor can meet the inductance requirement of double or multiple paths, and the winding space can be saved due to the close parallel winding between the inductor coils under the condition of controlling the cost, so that the inductor can be made small and thin, which conforms to the current development trend, and the structure is simple and easy to assemble, and the double-wire parallel winding manner enables the two inductor coils to be in close contact, so that the overall structural strength of the inductor coil group is enhanced, and deformation of the inductor coil group during pressing of the magnetically conductive main body is effectively avoided; the top surface of the magnetically conductive main body is provided with a magnet structure protruding by a certain thickness, the magnet structure is provided with a plurality of magnet pads protruding by a certain thickness, and the adjacent magnet pads have an interval; the magnet pad is provided with a pad terminal protruding by a certain thickness, the pad size of the magnet pad is larger than the pad size of the pad terminal; the pad terminal is designed to protrude, so that the pad terminal can be directly welded during welding, the risk of false welding is avoided, the welding quality is ensured, the magnet residue at the pad terminal is reduced, the welding surface is effectively increased, and the resistance at the welding position is reduced; the entire magnet pad is ensured to protrude, sufficient space is provided for tin beads generated when the soldering plate is fed, and the influence of the tin beads on welding is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1It is the whole structure schematic diagram of the inductor provided by the embodiment of the utility model.

[0018] Fig. 2 It is the front view of the inductor provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0019] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are illustrated, it is to be understood that the present application is not limited to the exemplary embodiments described herein, but is applicable to practices in general. Rather, the exemplary embodiments are presented herein to enable a thorough and complete disclosure of the present application as well as to convey the full scope of the present application to those skilled in the art.

[0020] It is to be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and the like are to be construed to be inclusive (i.e., to include both instances of open ended terms and instances of terms limiting to a specific number) unless otherwise indicated as otherwise limited by context. The methods described herein can be implemented by one or more computer programs or software modules or applications, or a combination thereof.

[0021] Although the terms first, second, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to differentiate one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, an element, component, region, layer or section discussed below can be termed a second element, component, region, layer or section without departing from the teachings of the exemplary embodiments.

[0022] For the convenience of description, spatial relative terms can be used in the specification to describe a relationship of one element or feature to another element or feature as shown in the drawings, such as "inner", "outer", "inside", "outside", "lower", "below", "upper", "above", "front end", "rear side", and the like. Such spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, an element described as "below" or "beneath" the other element or feature would then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used in the specification interpreted accordingly.

[0023] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0024] In order to illustrate the technical scheme of the present application, the following will be described by specific embodiments.

[0025] Please refer to Figs. 1-2 As shown in the figure, the inductor 100 provided by the embodiments of the present application comprises a magnetically conductive main body 10, an inductor coil set (not shown in the figure) arranged in the magnetically conductive main body, the inductor coil set is provided with a plurality of inductor coils (not shown in the figure), the leading end and the tail end of the inductor coil are connected with the pad terminal 13 respectively; by arranging at least one group of inductor coils in the interior of the magnetically conductive main body 10 in parallel winding mode, the leading end and the tail end of the inductor coil are connected with the pad terminal 13 respectively, so that the inductor demand of double or multiple paths can be met, and the winding space can be saved due to the close parallel winding between the inductor coils under the condition of controlling the cost, so that the inductor 100 can be made small and thin, which conforms to the current development trend, the structure is simple, easy to assemble, and the double-wire parallel winding mode makes the two inductor coils close contact, thereby enhancing the overall structural strength of the inductor coil set, and effectively avoiding deformation of the inductor coil set when the magnetically conductive main body 10 is pressed.

[0026] The top surface of the magnetic conductive body 10 has a magnet structure 11 with a certain thickness, the magnet structure 11 is provided with a plurality of magnet pads 12 with a certain thickness, and the adjacent magnet pads 12 have a spacing area, and the spacing distance between the adjacent magnet pads 12 is greater than 0.4mm; the magnet pad 12 is provided with a pad terminal 13 with a certain thickness, and the protruding height of the pad terminal 13 is 0-0.1mm, the design of the protrusion at the pad terminal 13 enables direct welding of the pad terminal 13 during welding, avoids the risk of false welding, ensures the welding quality, reduces the magnet residue at the pad terminal 13, effectively increases the welding surface, and reduces the resistance at the welding position; more guarantee the entire magnet pad protrusion, provide enough space for the tin beads generated when the soldering tin plate is provided, and reduce the influence of tin beads on welding.

[0027] The pad size of the magnet pad 12 is greater than the pad size of the pad terminal 13, and when welding, the solder tin melts and flows to the pad terminal 13, the pad terminal 13 is small in size, and the flow of solder tin on the pad terminal 13 is more uniform, reducing the generation of tin beads; when the component is welded, part of the solder tin on the pad terminal 13 flows to the magnet pad 12, and then the magnet pad 12 and the pad terminal 13 are used as pads to weld components, the magnet pad 12 provides a wider space for welding, and it is easier to accurately apply solder to the magnet pad, which facilitates the control of the welding position and the amount of tin, and reduces the probability of occurrence of welding defects such as false welding and missed welding.

[0028] In the embodiment of the utility model, the first end and the tail end of the inductance coil are respectively provided with electrode pins (not shown in the figure), and the electrode pins are in one-to-one correspondence with the pad terminals 13 and are welded and connected; the inductance coil is made of copper wire, and the electrode pins at the first end and the tail end of the inductance coil are welded and connected to the pad terminals 13 through spot welding; specifically, the electrode pins of the inductance coil in the magnetic conductive body 10 pass through the magnet structure and the magnet pad in sequence and are connected to the pad terminals.

[0029] In the embodiment of the utility model, the inductance coil group is composed of one or two or three or more groups of inductance coils. The specific number of groups of inductance coil groups is determined according to actual needs. If double inductance is needed, the inductance coil group is set to two groups, and if three inductance is needed, the inductance coil group is set to three groups. This embodiment takes the two situations of the inductance coil group being set to two groups and three groups as examples for illustration, but it needs to be understood that no matter how many groups of inductance coil groups are set, the inductance coil group and the inductance coil are tightly and wound. The advantage of such winding is that it can greatly improve the space utilization and save winding space.

[0030] In the embodiment of the utility model, the size of the solder pad of the solder pad terminal 13 is larger than the size of the electrode pin, which provides a wider operation space for welding, and makes it easier to accurately apply solder to the solder pad terminal, ensures that the electrode pin and the solder pad terminal form a good electrical connection and mechanical connection, and reduces the probability of occurrence of welding defects such as false welding and missed welding.

[0031] In the embodiment of the utility model, the surface of the magnet solder pad 12 is provided with a first electroplated layer 14; the surface of the solder pad terminal 13 is provided with a second electroplated layer 15; a third electroplated layer 16 is arranged along one end of the magnet solder pad 12 and the side surface of the magnetism main body 10; the electroplated layer can make the solder more easily spread on the surface of the solder pad during the welding process, form a good welding point, reduce the occurrence of welding defects such as false welding and missed welding, and improve the welding quality and reliability.

[0032] In the embodiment of the utility model, the magnetism main body 10 is pressed and formed on the periphery of the inductor coil group by a magnetic material. It should be noted that, in order to ensure the tightness of the magnetism main body 10 and the inductor coil group, the embodiment is designed to form the magnetism main body 10 on the periphery of the inductor coil group by pressing and forming the magnetic material. Specifically, the inductor coil group is placed in a mold, then the mold is filled with a magnetic material, and then pressing is performed.

[0033] In the embodiment of the utility model, the material of the magnetic conduction main body 10 is metal soft magnetic powder or ferrite material, the metal soft magnetic powder is one of the best soft magnetic materials at present, it has low coercive force and high magnetic conductivity, easy to magnetize and also easy to demagnetize, mainly used for magnetic conduction, electromagnetic energy conversion and transmission, widely used in various electric energy conversion equipment. The main components of the metal soft magnetic powder include iron, cobalt, nickel and other metal elements, with high saturation magnetic induction intensity and low loss characteristics, suitable for high frequency application and high precision electronic equipment. The ferrite material mainly includes Mn-Zn ferrite, Ni-Zn ferrite and other types, among which the output and dosage of Mn-Zn ferrite is the largest. The ferrite material is produced by powder metallurgy method, with the characteristics of low price, strong corrosion resistance and good high temperature stability. Specifically, when the inductor 100 is used as a power inductor, the magnetic material is preferably metal soft magnetic powder, which can withstand higher pulse current; when the inductor 100 is used as a common mode inductor, the magnetic material is preferably ferrite material, which is conducive to adjusting high frequency impedance. Thus, the inductance performance of the inductor can be effectively improved, and the use effect is good. The main components of the magnetic conduction main body 10 can be similar to those of other integrally formed inductors in the prior art, including any one or more of iron-based powder, iron-silicon-based powder, iron-silicon-chromium-based powder, iron-silicon-aluminum-based powder, amorphous powder and nanocrystalline powder. Since the specific components of the magnetic conduction main body 10 and its preparation process are not the technical focus in the present scheme, they are not limited in detail here. It should be considered that the magnet part of other integrally formed inductors with similar components is equivalent to the magnetic conduction main body 10 in the present scheme.

[0034] In the embodiment of the utility model, the outer surface of the inductor coil group is provided with an insulating layer (not shown in the figure).

[0035] In the embodiment of the utility model, the inductor coil is a flat winding coil; by adopting a flat coil to form an inductor coil, the inductor coil can have a larger cross-sectional area, and the inductor coil group can have a more compact structure.

[0036] In the embodiment of the utility model, the electrode pin is flat.

[0037] In the embodiment of the utility model, the magnetic conductive main body 10 and the inductance coil group are integrally formed structure, the inductor 100 is full enclosed structure, the magnetic shielding effect is good, can effectively reduce electromagnetic interference, and because the magnetic conductive main body 10 and the inductance coil group are close, so can avoid the noise, have higher inductance value and smaller leakage inductance, the overall design reduces the production difficulty, improves overall use effect, the magnetic conductive main body 10 and the manufacturing step of integrally formed structure of inductance coil group: S1, first inductance coil is embedded into mould, by filling metal soft magnetic powder or ferrite material in mould, then with pressing punch integrally pressed, punch end face has the square of protruding structure, S2, after pressing forming, the inductor is prepared, then the overall of inductor is carried out insulation spraying, again the window processing of magnet pad and pad terminal is carried out, S3, the magnet pad, pad terminal and magnet side surface after window processing are carried out electroplating.

[0038] In the inductor of the utility model, by at least one group of inductance coil is arranged in the inside of the magnetic conductive main body in parallel winding mode, the first end and the tail end of the inductance coil are connected with the pad terminal respectively, so that the inductance demand of double circuit or multichannel can be met, and the winding space can be saved due to the close parallel winding between the inductance coil and the inductance coil under the condition of controlling the cost, so that the inductor can be made small and thin, which meets the current development trend, the structure is simple, easy to assemble, and the double wire parallel winding mode makes the two inductance coils close contact, thereby enhancing the overall structural strength of the inductance coil group, effectively avoiding deformation of the inductance coil group when the magnetic conductive main body is pressed, etc. The top surface of the magnetic conductive main body has a magnet structure with a certain thickness, the magnet structure is provided with a plurality of magnet pads with a certain thickness, and the adjacent magnet pads have a spacing area; The magnet pad is provided with a pad terminal with a certain thickness, the pad size of the magnet pad is greater than the pad size of the pad terminal; The design of the protrusion at the pad terminal directly welds the pad terminal during welding, avoids the risk of false welding, ensures the welding quality, reduces the magnet residue at the pad terminal, effectively increases the welding surface, reduces the resistance at the welding position; More guarantee the entire magnet pad protrusion, provide enough space for tin beads generated when soldering the board, reduce the influence of tin beads on welding.

[0039] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present embodiment. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without mutual contradiction.

[0040] Finally, it should be noted that: the preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details, nor limit the utility model to the specific implementation described. Obviously, according to the content of the specification, many modifications and changes can be made. The present specification selects and describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the person skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the entire scope and equivalents thereof.

Claims

1. An inductor characterized by: The application relates to a magnetic body, an inductor coil group arranged in the magnetic body, a top surface of the magnetic body is provided with a convex magnet structure; the magnet structure is provided with a plurality of convex magnet pads, and a spacing area is arranged between adjacent magnet pads; the magnet pad is provided with a convex pad terminal; the pad size of the magnet pad is larger than the pad size of the pad terminal.

2. The inductor of claim 1, wherein, The inductor coil group is provided with a plurality of inductor coils, the inductor coils are respectively provided with electrode pins at the first end and the tail end, the electrode pins of the inductor coils arranged in the magnetic body are connected with the pad terminals through the magnet pads of the magnet structure.

3. The inductor of claim 2, wherein, The inductor coil group is composed of one group, two groups, three groups or more groups of the inductor coils.

4. The inductor of claim 2, wherein, The pad size of the pad terminal is larger than the size of the electrode pin.

5. The inductor of claim 1, wherein, The surface of the magnet pad is provided with a first electroplating layer; the surface of the pad terminal is provided with a second electroplating layer.

6. The inductor of claim 1, wherein, A third electroplating layer is arranged along one end of the magnet pad and the side surface of the magnetic body.

7. The inductor of claim 1, wherein The spacing distance between adjacent magnet pads is greater than 0.4 mm.

8. The inductor of claim 1, wherein, The convex height of the pad terminal is 0-0.1 mm.

9. The inductor of claim 2, wherein, The outer surface of the inductor coil group is provided with an insulating layer; the inductor coil is a winding flat coil; the electrode pin is flat.

10. The inductor of claim 1, wherein, The magnetic body and the inductor coil group are integrally formed.

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