TWM601452U - Inductor structure - Google Patents

Abstract

An inductance structure includes: a coil and a magnetic core. The coil includes a first end, a second end, and a plurality of loops. The first end and the second end are respectively provided at both ends of the coil, and the plurality of loops are provided at the first end and Between the second end portions, the first end portion and the second end portion bend and extend below the plurality of ring bodies, and the first end portion bends and extends a first bending section and a first extension section. The second end is bent and extended with a second bending section and a second extension section. The first extension section and the second extension section are located below the ring body and have a distance from the ring body. The first bending section, the first extension section, the second bending section, the second extension section and the ring body jointly define an accommodation space below the ring body; and the magnetic core is arranged in the accommodation space. In this way, the conventional inductor structure uses iron powder to be placed under the coil, and then iron powder is filled above the coil to mold the inductor, which causes the problem of large volume and complicated manufacturing process.

Description

Inductance structure

This creation is related to the technical field of a passive component, especially an inductive structure.

For example, the Republic of China Patent No. I441209 "Surface Mount Chip Coil Manufacturing Process", please refer to Figure A of the second case. In the conventional inductor structure described in the case, the coil can be located in the mold with pre-filled iron powder In the center, after filling iron powder above the coil, the iron powder is extruded by a punching machine to mold into an inductor. However, the inductor structure is easily squeezed during the molding process, resulting in a larger overall volume.

Please refer to the third diagram A and the eighth diagram of the case again. In the conventional inductor structure, the ends of the two ends of the coil are cut into a circular cross section (or elliptical cross section) as electrodes to make the inductor When the structure is connected to a circuit board as an SMD (Surface Mount Device), the electrode can be contacted (welded) area is too small, the bonding strength between the inductive structure and the circuit board is not good, if in order to increase the contact (Welding) area, the end of the coil must be extended and lengthened, and if copper wire is used as the wire, the use of copper wire will increase and the impedance will increase, and the demand for solder paste during soldering will also increase, resulting in The cost of manufacturing materials has risen.

Therefore, how to improve the above problems is the technical difficulty that the creator of this case wants to solve.

In view of the above, the purpose of this creation is to solve and improve the problems and deficiencies in the traditional use.

In order to achieve the above purpose, the author provides an inductance structure, which includes: a coil and a magnetic core. The coil includes a first end, a second end, and a plurality of loops. The first end and the second end are respectively provided on both ends of the coil, and the plurality of loops are provided on the first Between the end portion and the second end portion, the first end portion and the second end portion bend and extend below the plurality of ring bodies, and the first end portion bends and extends a first bending section and a The first extension section, the second end portion is bent to extend a second bending section and a second extension section. The first extension section and the second extension section are located below the plurality of ring bodies and are in line with the plurality of rings. There is a space between the ring bodies, and the first bending section, the first extension section, the second bending section, the second extension section and the plurality of ring bodies jointly define the plurality of rings. An accommodating space under the body; and the magnetic core is arranged in the accommodating space.

Preferably, the plurality of ring bodies include a top layer ring body and a bottom layer ring body, the top layer ring body is wound from the end of the first end portion, and the bottom layer ring body is wound from the end of the top layer ring body Out, and stacked under the top ring body, and the end of the top ring body is bent from top to bottom to form the outer side of the bottom ring body, and the second end extends from the end of the bottom ring body .

Preferably, the plurality of ring bodies are wound out from the end of the first end portion and layered on top of each other, and the second end portion is extended from the end of the plurality of ring bodies.

Preferably, the first extension section and the second extension section are relatively located on the same side of the magnetic core.

Preferably, the first extension section and the second extension section are relatively located on two sides of the magnetic core. Opposite side.

Preferably, the magnetic core is a quadrilateral.

Preferably, the magnetic core is provided with a plurality of wire grooves, and the plurality of wire grooves are relatively located on the same side of the magnetic core.

Preferably, the magnetic core is provided with a plurality of wire grooves, and the plurality of wire grooves are relatively located on two opposite sides of the magnetic core.

Preferably, the magnetic core is provided with a positioning groove.

Preferably, a covering body is provided outside the coil and the magnetic core, the covering body is an iron powder, and the particle size of the iron powder is 0.1 μm to 200 μm.

The inductor structure of this creation is to place the magnetic core in the accommodating space below the coil, and then fill with iron powder to mold the inductor. Compared with the conventional inductor structure, the iron powder is placed under the coil and then above the coil. Fill in iron powder to mold the inductor. The magnetic core of the inductor structure created by this invention is solid instead of iron powder, so it will not be squeezed and cause the overall volume to be too large, so the overall volume of the inductor structure can be reduced. Furthermore, this creation uses the end of the coil to bend and extends an extension section as the electrode. Compared with the conventional inductance structure which uses the end of the coil as the electrode, the inductance structure of this creation has a larger contact (welding) area of the electrode. Large, and because of the large contact (welding) area, the bonding strength with the circuit board can be improved.

1: coil

11: The first end

111: The first bending section

112: The first extension

12: second end

121: Second bending section

122: second extension

13: ring body

131: Top ring body

132: bottom ring

14: Housing space

2: magnetic core

21: Wire trough

22: positioning groove

3: coating body

The first picture is a schematic diagram of the structure of this creative flat wire coil.

The second figure is a schematic diagram of the structure of the circular coil of this creation.

The third picture A is the first structure of the coil and magnetic core of the general single-wire winding structure in this creation. intention.

The third diagram B is the second structure diagram of the coil and magnetic core of the general single-wire winding structure of this creation.

The third diagram C is the third structure diagram of the coil and magnetic core of the general single-wire winding structure of this creation.

The fourth picture A is the first structure diagram of the coil and magnetic core of the alpha winding structure of this creation.

The fourth figure B is a schematic diagram of the second structure of the coil and magnetic core of the alpha winding structure of this creation.

The fourth diagram C is a schematic diagram of the third structure of the coil and magnetic core of the alpha winding structure in this creation.

The fifth figure is a structural diagram of the magnetic core of this creation with a wire groove and the wire groove is relatively located on the same side of the magnetic core.

The sixth figure is a structural diagram of the magnetic core of the present creation with wire grooves and the wire grooves are located on opposite sides of the magnetic core.

The seventh figure is a schematic diagram of the structure of the magnetic core of this creation with positioning grooves.

The eighth figure is a schematic diagram of the first structure in which the coil and magnetic core of the invention are provided with a covering body, and the first extension section and the second extension section exposed on the covering body are used as the electrode surface.

The ninth figure is a schematic diagram of a second structure in which the coil and magnetic core of the invention are provided with a covering body, and the first extension section and the second extension section exposed on the covering body are used as the electrode surface.

The tenth figure is a schematic diagram of the third structure in which the coil and the magnetic core of the invention are provided with a covering body, and the first extension section and the second extension section exposed on the covering body are used as the electrode surface.

In order to make it easier for your examiner to understand the other features and advantages of this creation and the effects achieved by it more clearly, I would like to combine this creation with the attached drawings. The detailed description is as follows:

Please refer to the first figure and the third figure A, this creation provides an inductance structure, which includes: a coil 1 and a magnetic core 2.

The coil 1 includes a first end portion 11, a second end portion 12, and a plurality of ring bodies 13. The first end portion 11 and the second end portion 12 are respectively provided at both ends of the coil 1, and the plurality of The ring body 13 is provided between the first end portion 11 and the second end portion 12, the first end portion 11 and the second end portion 12 are bent and extended toward the bottom of the plurality of ring bodies 13, the first The end portion 11 is bent and extends with a first bending section 111 and a first extension section 112. The second end portion 12 is bent and extends with a second bending section 121 and a second extension section 122. The first extension section 112 and the second extension section 122 are located below the plurality of ring bodies 13, and have a distance from the plurality of ring bodies 13, and are formed by the first bending section 111, the first extension section 112, and the The second bending section 121, the second extension section 122 and the plurality of ring bodies 13 jointly define an accommodating space 14 below the plurality of ring bodies 13.

Please refer to the first and second diagrams, the coil 1 is made of insulated wires (the first picture is a coil wound by a flat wire or the second picture is a coil wound by a round wire) wound in a certain shape, The distinction by shape can include the common single-wire winding structure (the first and second figures are both single-wire winding structures) and the α-winding structure (the fourth figure is the α-winding structure). The α winding structure is named after the shape of the winding structure resembles the letter α, and is generally a double-layer structure (two layers of winding). Insulated wire refers to a layer of non-conductive (insulating) material that is uniformly and sealed around the periphery of the wire.

As shown in Figure A of the fourth, α winding structure (winding two layers): the plurality of rings 13 include a top ring 131 and a bottom ring 132, the top ring 131 is formed by the first end 11 is wound out, the bottom layer ring body 132 is wound out from the end of the top layer ring body 131 and stacked under the top layer ring body 131, and the end of the top layer ring body 131 is bent from top to bottom Formed on the outer side of the bottom ring body 132, the second end 12 extends from the end of the bottom ring body 132.

As shown in the first and second figures, a common single-wire winding structure (winding in multiple layers): the plurality of loops 13 are wound out from the end of the first end 11 and layered on top of each other, and the second end The portion 12 extends from the ends of the plurality of ring bodies 13.

The magnetic core 2 is arranged in the accommodating space 14, so that the coil and the magnetic core form a winding (winding refers to a coil that is electrically connected; a coil usually refers to a wire winding in a toroidal shape; the inductance can be one or more windings, The inductor structure in this case is mainly used in SMD, so there will only be one winding in the inductor structure).

Please refer to the third diagram A, the third diagram B, and the third diagram C respectively. This creation uses the first bending section 111 and the first extension section 112 to form a first lead of the inductor structure , And the second bending section 121 and the second extension section 122 form a second pin of the inductance structure, and according to the bending position of the bending section and the position of the extension section relative to the magnetic core 2, there are Three styles. As shown in the third figure A, the coil 1 has a single-wire winding structure, and the first bending section 111, the first extension section 112, the second bending section 121, and the second extension section of the coil 1 122 are all on the same side of the magnetic core 2; as shown in the third figure B, the coil 1 has a single-wire winding structure, and the first bending section 111, the first extension section 112 and the first The two bending sections 121 and the second extension section 122 can be located on opposite sides of the magnetic core 2 and are asymmetrical; as shown in the third figure C, the coil 1 has a single-wire winding structure, and the coil 1 The first bending section 111, the first extension section 112, the second bending section 121, and the second extension section 122 can be located on two opposite sides of the magnetic core 2 and are symmetrical to each other.

As shown in Fig. 4A, the coil 1 has an α-wound structure, the first bending section 111, the first extension section 112, and the second bending section 121 of the coil 1 and the second extension The segments 122 are all on the same side of the magnetic core 2; as shown in the fourth and third figure B, the coil 1 has an α winding structure, and the first bending segment 111, the first extension segment 112 and The second bending section 121, the second extension The segments 122 can be relatively located on two opposite sides of the magnetic core 2 and are asymmetrical; as shown in the fourth figure C, the coil 1 has an alpha winding structure, and the first bending segment 111 and the first bending segment 111 of the coil 1 An extension section 112, the second bending section 121, and the second extension section 122 may be located on two opposite sides of the magnetic core 2 and are symmetrical to each other.

In this embodiment, the magnetic core 2 may be a quadrangular body. More specifically, as shown in FIG. 5, the magnetic core 2 is provided with a plurality of wire grooves 21 (or missing corners), and the plurality of wire grooves 21 is relatively located on the same side of the magnetic core 2, for example, two wire grooves 21, or as shown in the sixth figure, the magnetic core 2 is provided with a plurality of wire grooves 21 (or missing corners), and the plurality of wire grooves 21 are opposite to each other. Located on two opposite sides of the magnetic core 2, the first bending section 111 of the first end portion 11 and the second bending section 112 of the second end portion 12 can be bent along the wire groove 21 (not shown in the figure) Show), which can reduce the volume size of the winding. As for the setting position of the wire guide 21, it is determined according to actual requirements.

Please refer to the seventh figure, the magnetic core 2 is also provided with a positioning groove 22, the positioning groove can be provided on the upper surface or the lower surface of the magnetic core, depending on requirements, the positioning groove 22 is used for The magnetic core 2 is positioned for a jig to position the magnetic core 2 so that the end of the coil 1 can be easily bent during the process of winding the coil 1.

Please refer to the eighth figure, the coil 1 and the magnetic core 2 (not shown) are provided with a covering body 3 outside. The covering body 3 refers to placing the coil and the magnetic core in a mold. The mold is filled with a magnetic mixed material, the magnetic mixed material can be iron powder, the particle size of the iron powder is 0.1 μm~200 μm, and the magnetic mixed material is used as the covering body 3 to cover the coil 1 And the magnetic core 2 (not shown in the figure), using a punching machine to extrude the iron powder with a punching pressure of 0.1-20 tons, and then mold it to form the magnetic mixed material and the winding (referring to the coil 1 and the magnetic core 2) into SMD Chip inductors (also called integrated inductors). In specific implementation, as shown in FIG. 8, the first extension section 112 and the second extension section 122 may be relatively located on the same side of the magnetic core 2. Or as shown in the ninth and tenth figures, the first extension The section 112 and the second extension section 122 may be located on two opposite sides of the magnetic core 2 and may be symmetrical or asymmetrical.

To sum up, the conventional inductor structure uses iron powder to be placed under the coil, and then iron powder is filled above the coil to mold the inductor. Because the iron powder is easily squeezed during the molding process, the overall volume is too large. The inductance structure of this creation is to put the magnetic core in the accommodating space below the coil, and then fill with iron powder to mold the inductor. In contrast, the magnetic core is solid instead of iron powder, so it will not There is a problem that the overall volume is too large due to squeezing, so the overall volume of the inductor structure can be reduced. At the same time, because the conventional inductance structure uses the end of the coil as the electrode, and the original creation is to bend and extend an extension from the end of the coil as the electrode. In contrast, the contact (welding) area of the electrode is larger, and Due to the large contact (welding) area, the bonding strength with the circuit board can be improved. In addition, the conventional inductance structure requires the iron powder to be placed in the mold first, while the inductance structure of this creation only puts the magnetic core in the accommodating space under the coil, and the manufacturing process is relatively simple and takes less time. Therefore, the process time can be shortened.

The above discussion is only a preferred embodiment of this creation, and is not intended to limit the scope of implementation of this creation; therefore, any equivalent shape, structure or combination transformation made without departing from the spirit and scope of this creation should Covered in the scope of patent application for this creation.

1: coil

11: The first end

111: The first bending section

112: The first extension

12: second end

121: Second bending section

122: second extension

13: ring body

131: Top ring body

132: bottom ring

2: magnetic core

Claims (10)

An inductance structure, which includes: A coil includes a first end, a second end, and a plurality of loops. The first end and the second end are respectively provided at both ends of the coil, and the plurality of loops are provided on the first end. Between one end and the second end, the first end and the second end are bent and extend below the plurality of rings, and the first end is bent and extends a first bending section and A first extension section, the second end is bent to extend a second bending section and a second extension section, the first extension section and the second extension section are located below the plurality of ring bodies, and are connected to the There is a space between the plurality of ring bodies, and is defined by the first bending section, the first extension section, the second bending section, the second extension section and the plurality of ring bodies. An accommodating space under the ring; and A magnetic core is arranged in the containing space. The inductance structure described in item 1 of the scope of the patent application, wherein the plurality of ring bodies include a top ring body and a bottom ring body, the top ring body is wound from the end of the first end, and the bottom ring body It is wound out from the end of the top ring body and stacked under the top ring body, and the end of the bottom ring body is bent from top to bottom to form the outer side of the top ring body, the second end It extends from the end of the bottom ring. The inductance structure described in item 1 of the scope of the patent application, wherein the plurality of loops are wound out from the end of the first end portion and stacked on top of each other, and the second end is extended from the end of the plurality of loops . According to the inductance structure described in claim 1, wherein the first extension section and the second extension section are relatively located on the same side of the magnetic core. According to the inductance structure described in item 1 of the scope of patent application, the first extension section and the second extension section are relatively located on two opposite sides of the magnetic core. In the inductance structure described in item 1 of the scope of patent application, the magnetic core is a quadrilateral. According to the inductance structure described in item 1 of the scope of patent application, the magnetic core is provided with a plurality of wire grooves, and the plurality of wire grooves are relatively located on the same side of the magnetic core. According to the inductance structure described in item 1 of the scope of patent application, the magnetic core is provided with a plurality of wire grooves, and the plurality of wire grooves are relatively located on two opposite sides of the magnetic core. In the inductance structure described in item 1 of the scope of patent application, the magnetic core is provided with a positioning groove. As for the inductance structure described in item 1 of the scope of patent application, the coil and the magnetic core are provided with a covering body, the covering body is an iron powder, and the particle size of the iron powder is 0.1 μm~200 μm.

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