KR101142218B1

KR101142218B1 - Inductor Module

Info

Publication number: KR101142218B1
Application number: KR1020100050238A
Authority: KR
Inventors: 이경식
Original assignee: 부전전자 주식회사
Priority date: 2009-08-04
Filing date: 2010-05-28
Publication date: 2012-05-04
Also published as: KR20100082741A

Abstract

The present invention relates to an inductor module, and more particularly, to an inductor module used in an LED backlight unit converter for an LCD TV or an LCD monitor. An inductor module according to the present invention includes a bobbin in which a coil is wound on an outer circumferential surface of a middle core inserting portion formed in a central portion, an upper core inserted from one side of the bobbin and surrounding an upper portion of the bobbin, and facing the upper core from the other side of the bobbin. In the inductor module comprising a lower core which is inserted into the bobbin to surround the lower portion of the bobbin, the upper and lower cores are stepped on both sides of the middle core and the middle core is inserted into the middle core insertion portion of the bobbin It is made of an outer core formed of; The bobbin includes an external core support formed on both upper ends of the middle core inserting portion to support both ends of the outer core, and a terminal board integrally formed at both lower ends of the middle core inserting portion of the bobbin and having a plurality of terminals. . According to the present invention configured as described above, it is possible to obtain a desired output voltage by increasing the number of windings and the length of the coil wound on the outer circumferential surface of the bobbin as compared with the conventional vertical inductor.

Description

Inductor Module

The present invention relates to an inductor module, and more particularly, to a vertical inductor module used in a backlight unit converter for an LCD TV or an LED monitor.

In general, an inductor is mounted inside a power module of a home appliance or a driving circuit of an LED lamp. A conventional inductor mainly uses a drum type inductor.

12 is a perspective view of a conventional power inductor and FIG. 13 is a side cross-sectional view of a conventional power inductor. As shown in the figure, a drum core A is provided at the center of the inductor, and a cap B is covered at the outer surface of the drum core A. As shown in FIG. The conventional inductor having such a structure has the following problems.

The conventional power inductor has a structure in which a cap or disk (DSC) core is covered after winding the drum core to have a relatively large inductance characteristic with a small number of turns. In addition, power inductors using existing EE / EFD / EER cores have a limited height and volume due to the limited winding mounting area of the cores.

On the other hand, current electronic products are diversified in their functions and performance is getting better, especially in the direction of compact and lightweight. In order to achieve small size and light weight, it is possible to reduce the size or volume of components mounted in electronic products. In particular, with the development of semiconductor integrated circuits, it is possible to reduce the size of the circuits to a certain extent, but it is a difficult problem to reduce the volume of the inductor mounted inside the electronic product. For this reason, research into miniaturization and weight reduction of inductors mounted in electronic products continues.

For example, recently, LEDs having high power efficiency and easy light source control are mainly used for light sources of backlight units of LCD panels. LEDs for TFT LCDs are further developed in an environment-friendly and high color reproducibility direction, and the market demands such LEDs. In the case of a driver for controlling the color of LEDs for LCD panels, slimming and miniaturization are currently accelerating. In placing components on the PCB of an LED driver, much consideration should be given to maximizing space utilization.

The inductor module of the present invention can be used to drive an LED backlight system of an LCD TV. In the case of a backlight using a conventional fluorescent tube, the size of the inductor module was not important because the size of the fluorescent tube was large. However, recently developed LED TVs use a direct current (DC) voltage according to LED driving, not a fluorescent tube driving, and thus a new type of inductor is required.

In other words, in order to drive a high output LED using an AC power supply, it is necessary to convert the current to a voltage suitable for the LED. In addition, a vertical inductor is required to minimize the influence of EMI. In addition, as the LED backlight becomes slimmer, a slimmer inductor is required. Conventional vertical inductors have a limitation in increasing power because they use a drum core.

As described above, an object of the present invention is to provide an inductor module capable of being silized by reducing the size and thickness of a conventional vertical inductor while meeting the trend of light and small.

In addition, another object of the present invention to provide an inductor module that can maximize the power by increasing the winding while minimizing the height of the inductor module.

It is another object of the present invention to provide an inductor module capable of obtaining a high output by increasing the number of turns of a coil wound on an outer circumferential surface of a bobbin.

In addition, an object of the present invention is to provide an inductor module capable of winding a high output by allowing the coil to be wound in the space formed between the outer core and the outer core support.

In order to achieve the above object of the present invention, the inductor module according to the present invention, the coil is wound on the outer peripheral surface of the core core insertion portion formed in the central portion, and the upper core is inserted from one side of the bobbin surrounding the upper portion of the bobbin and In the inductor module comprising a lower core is inserted facing the upper core from the other side of the bobbin surrounding the lower portion of the bobbin,

The upper and lower cores are composed of a middle core inserted into a middle core insertion unit of the bobbin and an outer core formed in a stepped shape on both sides of the middle core;

The bobbin is formed of an external core support formed on both upper ends of the middle core inserting portion so as to support both ends of the outer core and a terminal substrate integrally formed at both lower ends of the middle core inserting portion of the bobbin and having a plurality of terminals.

In the present invention, the middle core insertion portion of the bobbin has an elliptical cross section formed by forming the thickness of the two central portions facing each other smaller than the thickness of the two side portions.

The inner surface of the outer core support is formed with a multi-faceted machining portion for coupling with the outer core and reducing the weight.

Therefore, the coil may be wound in a space formed between the outer core and the outer core support.

Another embodiment of the present invention is a bobbin coil wound on the outer peripheral surface of the core core insertion portion formed in the center portion, the upper core is inserted from one side of the bobbin surrounding the upper portion of the bobbin, and facing the upper core from the other side of the bobbin In the inductor module is inserted and comprises a lower core surrounding the lower portion of the bobbin,

The core core insert portion of the bobbin is formed by making the thickness of both the central portions facing each other smaller than the thickness of both sides to have an overall elliptical cross section, thereby increasing the number of turns of the coil wound on the outer peripheral surface of the core core insert portion It is done.

The upper and lower cores may have a stepped portion between a middle core inserted into the middle core insertion portion of the bobbin and an external core formed on both sides of the middle core, thereby forming a coil wound between the core insertion portion and the outer core. It is characterized by increasing the number of turns.

At both upper ends of the bobbin, an outer core support for supporting the outer cores of the upper and lower cores is formed.

The inductor module according to the present invention can increase the size and power capacity compared to the conventional drum type inductor while responding to the trend of light and short.

In addition, the inductor module according to the present invention has the effect of obtaining a high output by increasing the number of coils wound on the outer circumferential surface of the bobbin with an increased surface area.

In addition, the inductor module according to the present invention has the effect of increasing the number of turns compared to the drum core inductor by winding a coil in a space formed between the outer core and the outer core support to achieve high output.

1 is a top perspective view of an inductor module according to an embodiment of the present invention;
FIG. 2 is an exploded perspective view of the inductor module shown in FIG. 1;
3 is a sectional view taken along the line AA in Fig. 1,
4 is a cross-sectional view taken along line BB of FIG.
5 is a bottom side perspective view of the inductor module according to the present invention;
6 is a right side view of the inductor module according to the present invention;
7 is a front view of the inductor module according to the present invention;
8 is a perspective view of a state in which an upper core is removed in an inductor module according to the present invention;
9 is a perspective view of the lower core in the inductor module according to the present invention removed;
10 is a cross-sectional side view of the upper side of the bobbin in the inductor module according to the present invention;
11 is a perspective view of the lower side of the bobbin in the inductor module according to the present invention;
12 is a perspective view showing a conventional power inductor,
FIG. 13 is a side cross-sectional view of the conventional power inductor shown in FIG.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the inductor module according to the present invention.

1 is a top perspective view of an inductor module according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the inductor module illustrated in FIG. 1, and FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1.

4 is a cross-sectional view taken along line B-B of FIG. 1, FIG. 5 is a bottom perspective view of the inductor module according to the present invention, and FIG. 6 is a right side view of the inductor module according to the present invention.

In addition, Figure 7 is a front view of the inductor module according to the present invention, Figure 8 is a perspective view of the upper core is removed in the inductor module according to the present invention, Figure 9 is a lower core in the inductor module according to the present invention Is a perspective view in a removed state.

10 is a cross sectional top view of the bobbin in the inductor module according to the present invention, and FIG. 11 is a bottom perspective view of the bobbin in the inductor module according to the present invention.

1 to 11, the vertical inductor module 100 (hereinafter, referred to as an inductor module) according to the present invention includes a bobbin 110 around which a coil 140 is wound, and the bobbin 110. The upper core 120 is inserted from one side, and the lower core 130 is inserted to face the upper core 120 from the other side of the bobbin 110.

As shown in FIGS. 1 to 4, the bobbin 110 has a terminal board 116 having a plurality of terminals 118 at both lower ends of the middle core insertion part 112 having a hollow ring shape. It is formed integrally with the outer core support 114 to support both ends of the outer core 124 of the upper core 120, which will be described later on both upper ends of the middle core insertion portion 112 is formed, the outer core support 114 On the inner surface of the slit, a polygonal processing part 114a for weight reduction is recessed at a predetermined depth.

The terminal board 116 is formed integrally as a plate having a predetermined length and height at both lower ends of the middle core insertion part 112.

At this time, as shown in Figure 10, the middle core insertion portion 112 is formed by having the thickness of both the central portion (112a) facing each other smaller than the thickness of the side portion (112b), it has an elliptical cross section compared to the conventional circular cross section Doing.

As a result, the space between the coil windings formed between the middle and lower insertion portions 112 and the outer and outer cores 124 and 134 of the upper and lower cores is increased as the thickness of both center portions 112a becomes thinner. Compared to the core inserting portion, it is possible to increase the number of coils 140 wound on the outer circumferential surface of the core inserting portion 112 to obtain a high output.

Subsequently, as shown in FIGS. 1 to 4, the upper core 120 has an outer core 124 integrally formed at both sides of the central core 122 having a cylindrical shape, and the outer core 124 is It has a stepped shape corresponding to the shape of the outer core support 114 of the bobbin 110, the upper core 120 is inserted into the core core of the bobbin 110 through the middle core 122 The part 112 is inserted from one side to surround the upper portion of the bobbin 110. At this time, the middle core 122 occupies about half of the inside of the middle core inserting portion 112.

As shown in FIGS. 1 to 4, the lower core 130 has an outer core 134 integrally formed at both sides of the middle core 132 having the same shape as the middle core 122 of the upper core 120. The outer core 134 also has a stepped shape corresponding to the shape of the outer core support 114 of the bobbin 110, the lower core 130 is the through the core 132 It is inserted from the other side of the core core insertion portion 112 of the bobbin 110 to surround the lower portion of the bobbin 110. At this time, the middle core 132 occupies the remaining half of the inside of the middle core inserting portion (112).

That is, the upper and lower cores 120 and 130 are inserted into the middle core insertion part 112 of the bobbin 110 through the middle cores 122 and 132. ) Are face-contacted to face each other inside the core inserting portion (112).

Accordingly, the inductor module 100 according to the present invention can be compactly configured by reducing the size and thickness of the conventional vertical inductor while meeting the trend of light and short.

In addition, the coil 140 may also be wound in the space S (see FIG. 3) formed between the outer core 124 and 134 having the stepped shape and the outer core support 114. By increasing the number of turns compared to the type inductor, high output can be achieved. 5, 9, and 11, reference numeral 119 denotes a terminal board connecting rod, and 119a denotes a machining part for weight reduction.

The present invention described above is limited to the above-described embodiment and the accompanying drawings as various substitutions and modifications can be made within a range without departing from the technical spirit of the present invention for those skilled in the art. It doesn't happen.

100: inductor module 110: bobbin
112: core insert portion 114: external core support
116: terminal board 118: terminal
120: upper core 122,132: middle core
124,134: external core 130: lower core
140: coil

Claims

A bobbin coiled around an outer circumferential surface of the core portion inserted into the center portion, an upper core inserted from one side of the bobbin to cover the upper portion of the bobbin, and inserted into the upper core from the other side of the bobbin to face the upper core. In the inductor module comprising a lower core surrounding,
The upper core and the lower core are composed of a circular middle core inserted into the middle core inserting portion of the bobbin and an outer core formed in a stepped shape on both sides of the middle core;
The bobbin may include a middle core insert having a circular inner circumferential surface and an outer core support formed at both upper ends of the middle core insert so as to support both ends of the outer core so that the circular middle core is closely inserted. It is formed integrally with the lower end of both sides of the core inserting portion is provided with a terminal board having a plurality of terminals,
The middle core insertion portion of the bobbin forms the thickness of both the central portions facing each other smaller than the thickness of both sides to form an elliptical cross section of the outer circumference, and the upper and lower sides of the outer core and the bobbin formed on both sides of the upper and lower cores. Installed in the external core support and the terminal board to be perpendicular to each other, to maximize the size of the space formed between the outer core and the external core support and the terminal board to increase the number of turns of the coil wound on the outer peripheral surface of the core insert Inductor module characterized in that.

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The method of claim 1,
The inner surface of the outer core support is inductor module, characterized in that the processing portion of the polygonal shape for coupling with the outer core and reducing the weight is formed.

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