KR20240045078A - Transformer and display device including the same - Google Patents

Abstract

The transformer of the present invention includes a core portion including a first core and a second core disposed spaced apart from the first core, a coil portion including a primary coil and a secondary coil disposed spaced apart from the primary coil, and a core portion within the core portion. At least a portion of the first core and the second core includes a bobbin portion coupled to the coil portion, each of the first core and the second core includes an upper core and a lower core disposed to face the upper core in the first direction, and the primary coil includes the first core. A first coil side including a coil side, a first coil side and a distal end positioned opposite a second direction intersecting the first direction, and a first coil intermediate between the first coil side and the first coil other side. and a second coil, wherein the secondary coil includes a second coil side, a second coil other side including a distal end located opposite to the second coil one side and the second direction, and a space between the second coil one side and the second coil other side. It includes a second coil middle portion, the primary coil and the secondary coil are arranged side by side in the second direction, and the bobbin portion includes a first bobbin accommodating the other side of the first coil and one side of the second coil, the first bobbin and the second direction. A second bobbin facing the other side of the second coil and one side of the first coil disposed, a first fastening member extending from the first bobbin toward the middle portion of the first coil and disposed at the end of the first bobbin, and a second bobbin from the second bobbin. 2 It includes a second fastening member extending toward the middle of the coil and disposed at the end of the second bobbin, wherein the first fastening member and the second fastening member are fastened to each other to form a fastening portion, and a second fastening member is provided between the first bobbin and the fastening portion. It includes one core being disposed, and a second core being disposed between the second bobbin and the fastening part.

Description

Transformer and display device including the same {TRANSFORMER AND DISPLAY DEVICE INCLUDING THE SAME}

The present invention relates to a transformer and a display device including the same.

Generally, a driving power is required to drive an electronic device, and a power supply device, such as a power supply unit (PSU), is essentially employed to supply this driving power to the electronic device.

In particular, since slimming is required in display devices such as flat TVs along with larger display sizes, there is a challenge of reducing thickness while satisfying the increased power consumption of larger displays.

In a power supply unit (PSU), the transformer occupies a relatively large volume compared to other components, so for slimming, it is common to omit elements that occupy a large thickness within the transformer or consider adjusting the quantity. For example, in the transformer that forms the power supply unit of a recent flat panel display device, the bobbin on which the primary and secondary coils are wound and fixed is omitted, or a plurality of slim transformers with low capacity are used.

These PSUs require a specific range of leakage inductance (e.g., 50 μH or more) for circuit resonance tank design and frequency matching. However, since a typical slim-type transformer adopts a structure in which the primary coil and the secondary coil are stacked vertically, both the primary coil and the secondary coil contribute to the thickness due to the vertical stacking, so of course there is a limit to the thickness reduction. There is a problem in that the leakage inductance is significantly lowered (e.g., about 3 μH). Leakage inductance must be secured above a certain level for switching mode operation within the circuit.

Accordingly, there is a demand for a transformer that can be slimmer and secure leakage inductance, and a flat panel display device using the same.

In the case of a slim transformer, the primary and secondary coils are spaced horizontally to meet the required leakage inductance value. As the size of the TV increases, power consumption inevitably increases, and for this, the distance between coils or the size of the core may also increase. Accordingly, additional adjustment of the leakage inductance value is required along with a decrease in the efficiency and workability of the transformer and an increase in the manufacturing cost.

In particular, in the case of large-capacity transformers applied to large TVs of 500W (watt) or more, the core size is larger than before, which may cause imbalance in back thickness or damage to the core after heat treatment for forming the core. This may cause heat generation when the transformer is driven, ultimately leading to a decrease in the efficiency of the transformer, and additional adjustment of the leakage inductance value is required.

Therefore, there is a need to improve the yield of cores in order to reduce manufacturing costs.

In addition, large-capacity transformers have a very large area, so there is a high possibility that they will be distorted or bent due to the increased area when applying existing slim bobbins. Additionally, in order to maximize the cross-sectional area of the coil, the height of the coil must be increased in the existing slim bobbin structure. Accordingly, in order to slim the transformer, it is attempted to apply a bobbinless structure that omits the upper and lower surface structures. However, such a bobbinless structure has no part to support the core, so a lot of load is inevitably applied to the bobbin.

(0001) Domestic Registered Patent No. 10-0748934 (0002) Domestic Published Patent No. 10-2012-0138700

The technical problem to be solved by the present invention is to provide a transformer using a core without loss of efficiency.

Another technical problem to be solved by the present invention is to provide a display device to which the above transformer is applied.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

The transformer of the present invention for achieving the above technical problem includes a core portion including a first core and a second core disposed to be spaced apart from the first core; A coil unit including a primary coil and a secondary coil disposed to be spaced apart from the primary coil; and a bobbin portion at least partially coupled to the coil portion within the core portion, wherein each of the first core and the second core includes: an upper core; and a lower core disposed to face the upper core in a first direction, wherein the primary coil includes: one side of the first coil; a first coil other side including one side of the first coil and a distal end positioned opposite to a second direction intersecting the first direction; and a first coil intermediate portion between one side of the first coil and the other side of the first coil, wherein the secondary coil includes: a second coil portion; a second coil side including one side of the second coil and a distal end located opposite to the second direction; and a second coil middle portion between one side of the second coil and the other side of the second coil, wherein the primary coil and the secondary coil are arranged side by side in the second direction, and the bobbin portion includes the a first bobbin accommodating the other side of the first coil and the other side of the second coil; a second bobbin facing the first bobbin in the second direction and having the other side of the second coil and one side of the first coil disposed; a first fastening member extending from the first bobbin toward the middle portion of the first coil and disposed at an end of the first bobbin; and a second fastening member extending from the second bobbin toward the middle portion of the second coil and disposed at an end of the second bobbin, wherein the first fastening member and the second fastening member are fastened to each other to form a fastening member. and the first core is disposed between the first bobbin and the fastening portion, and the second core is disposed between the second bobbin and the fastening portion.

Additionally, the fastening part may include one arranged to surround at least a portion of the middle portion of the first coil and at least a portion of the middle portion of the second coil.

Additionally, the fastening part may include at least a portion disposed outside the coil unit in a third direction that simultaneously intersects the first direction and the second direction.

Additionally, the bobbin unit includes a plurality of first ribs connecting the first bobbin and the first fastening member; and a plurality of second ribs connecting the second bobbin and the second fastening member.

Additionally, at least a portion of the first coil middle portion and at least a portion of the second coil middle portion may be disposed between the plurality of first ribs and the plurality of second ribs in the third direction.

Additionally, the first coil middle portion and the second coil middle portion may include an area directly facing the core portion in the first direction.

Additionally, the first bobbin may include a receiving groove formed in which the other side of the first coil and one side of the second coil are accommodated.

Additionally, a third bobbin may be further accommodated in the receiving groove, and the third bobbin may include a seating support portion on which the other side of the first coil and one side of the second coil are disposed.

In addition, the third bobbin includes a third fastening member extending toward the fastening part and disposed at an end of the third bobbin, and the third fastening member is connected to the first fastening member and the second fastening member in the fastening part. It may include something fastened to at least one of the members.

Additionally, the first fastening member, the second fastening member, and the third fastening member may include at least a portion of the first fastening member overlapping each other in the first direction.

In addition, the bobbin unit may further include a plurality of third ribs connecting the third bobbin and the third fastening member.

Additionally, the plurality of third ribs may include those disposed between the plurality of first ribs.

Additionally, at least a portion of the middle portion of the first coil may be disposed between the plurality of third ribs.

Additionally, the seating support portion may include a first seating portion on which the other side of the first coil is disposed; and a second seating portion on which one side of the second coil is disposed.

Additionally, the first bobbin may include a coil pull-out portion formed so that at least a portion of the other side of the first coil is pulled out.

In addition, the display device of the present invention for achieving the above technical problem includes a transformer; and a circuit board on which the transformer is disposed.

The above aspects of the present invention are only some of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention will be described in detail by those skilled in the art. It can be derived and understood based on.

The present invention described above has the following effects.

First, when manufacturing a transformer that requires a certain leakage inductance, such as an LLC circuit, fine control of the leakage inductance is possible by applying a divided segment core.

Additionally, in the case of large-capacity transformers, as the size of the core increases, it is possible to control the decrease in transformer efficiency due to uneven thickness of the core.

In addition, in the case of large-capacity transformers, as the size of the core increases, the defect rate increases during the manufacturing process, reducing mass productivity. However, by applying divided cores, the manufacturing size can be reduced, improving yield and reducing overall costs.

In addition, by applying a structure where the divided cores are separated from each other and the spaced space is filled with bobbins, it is possible to prevent the core from chipping or cracks from occurring due to friction between the divided cores when operating the transformer. there is.

Additionally, by omitting the upper and lower surface structures of the bobbin applied to the divided core, the overall thickness of the transformer can be reduced.

In addition, the problem that the overall rigidity of the transformer may be reduced due to the application of a divided core and the omission of the upper and lower surface structures of the bobbin can be solved by applying a bobbin structure with added ribs.

In addition, since the separation distance between the primary coil and the secondary coil can be controlled by the rib applied to the bobbin, leakage inductance according to the separation distance between coils can be secured.

Additionally, by applying an insulating coated wire to the primary coil, the withstand voltage of the transformer can be secured.

In addition, by bonding the primary coil and forming it as one piece, the overall rigidity of the transformer can be improved based on the increase in the strength of the winding form.

In addition, heat generation due to inductance deviation can be minimized by positioning the secondary coil in an inverted state, i.e., one end of the wire located on the inside is placed on the outside, and the other end of the wire located on the outside is placed on the inside.

Additionally, the overturned secondary coil can be kept from lifting through the support part.

In addition, the flat panel display device including the above-described transformer can be slimmed compared to a typical bobbin with an upper plate by replacing the upper part of the bobbin part with a thin film-type coil fixing part.

The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

1 is a perspective view according to an embodiment of the transformer of the present invention,
Figure 2 is an exploded perspective view of Figure 1;
Figure 3 is a bottom perspective view of Figure 1;
Figure 4 is an exploded perspective view of the bottom of Figure 3;
5A is a plan view showing a transformer having segment cores of equal size divided by equal separation distances according to the present invention;
Figure 5b is a plan view showing a transformer having segment cores of the same size divided by different separation distances according to the present invention;
Figure 5c is a plan view showing a transformer having segment cores of different sizes divided by equal spacing according to the present invention;
5D is a plan view showing a transformer having segment cores of different sizes divided by different spacing distances according to the present invention;
Figure 6 is an exploded perspective view of the bobbin portion according to the present invention;
Figure 7a is a plan view showing the bobbin part according to the present invention;
Figure 7b is a cross-sectional view of portion AA of Figure 7a;
Figure 7c is a cross-sectional view of portion BB of Figure 7a;
Figure 7d is a cross-sectional view of portion CC of Figure 7a;
Figure 8 is a perspective view showing the core portion removed from the transformer of the present invention;
Figure 9 is a perspective view showing a state in which the first bobbin in Figure 8 is removed;
Figure 10 is a perspective view showing a state in which the secondary coil portion is composed of two rows in Figure 9;
11 is a perspective view showing a third bobbin according to the present invention;
FIG. 12A is a plan view of the shape of the secondary coil wound on the seating support portion of the primary bobbin in the embodiment shown in FIG. 9, viewed from the x-axis direction;
Figure 12b is an example showing the arrangement of the secondary coil within the core in an embodiment in which the secondary coil consists of one row;
FIG. 13A is a plan view of the shape of the secondary coil wound on the seating support portion of the primary bobbin in the embodiment shown in FIG. 10, viewed from the x-axis direction;
Figure 13b is an example diagram showing the state in which the secondary coil is arranged inside the core in an embodiment in which the secondary coil is composed of two rows.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

Terms containing ordinal numbers, such as second, first, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, the second component may be referred to as the first component without departing from the scope of the present invention, and similarly, the first component may also be referred to as the second component. The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

In the description of the embodiments, each layer (film), region, pattern or structure is “on” or “under” the substrate, each layer (film), region, pad or pattern. The description of being formed includes all being formed directly or through another layer. The standards for top/top or bottom/bottom of each floor are explained based on the drawing. Additionally, the thickness or size of each layer (film), region, pattern, or structure in the drawings may be modified for clarity and convenience of explanation, and therefore does not entirely reflect the actual size.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Hereinafter, embodiments will be described in detail with reference to the attached drawings, but identical or corresponding components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted. Additionally, the embodiment is described using a Cartesian coordinate system, but of course it can be described using another coordinate system. In the Cartesian coordinate system, the x-axis, y-axis, and z-axis shown in each figure are orthogonal to each other, but the embodiment is not limited thereto. The x-axis, y-axis, and z-axis may intersect each other.

In addition, considering that the transformer related to the embodiment is mounted on the circuit board of the display device, the thickness (vertical height) of the transformer according to the present invention to contribute to slimming of the display device is 14 mm or less from the top surface of the circuit board, preferably It may be 12 mm or less, more preferably 10 mm or less.

Hereinafter, a transformer to which a segment core according to this embodiment is applied will be described in detail with reference to the attached drawings.

Figure 1 is a perspective view according to an embodiment of the transformer of the present invention, Figure 2 is an exploded perspective view of Figure 1, Figure 3 is a bottom perspective view of Figure 1, Figure 4 is an exploded bottom perspective view of Figure 3, and Figure 5a is the main perspective view. It is a plan view showing a transformer having segment cores divided into equal separation distances according to the present invention, Figure 5b is a plan view showing a transformer having segment cores divided into different separation distances according to the present invention, and Figure 5c is a plan view showing a transformer according to the present invention. It is a plan view showing a transformer having segment cores of different sizes divided by the same separation distance, and Figure 5d is a plan view showing a transformer having segment cores of different sizes divided by different separation distances according to the present invention.

First, with reference to FIGS. 1 to 5, the structure of a transformer (hereinafter referred to as 'transformer') to which the present invention's segment core is applied will be described as follows.

The transformer of the present invention may be configured to include a core portion 100, a coil portion 200, and a bobbin portion 300.

The core portion 100 has the characteristics of a magnetic circuit and can serve as a passage for magnetic flux.

The core portion 100 may include an upper core 110 and a lower core 120. The upper core 110 includes a first upper core 110-1 and a second upper core 110-2, and the lower core 120 includes a first lower core 120-1 and a second lower core ( 120-2) may be included. At this time, the first upper core 110-1 and the first lower core 120-1 are the first core, and the second upper core 110-2 and the second lower core 120-2 are the second core. can be defined. The upper core 110 and lower core 120 may be divided in a first direction (x-axis direction), and the upper core 110 and lower core 120 may be combined to form one core portion 100. You can. At this time, the upper core 110 can be defined as the core located furthest from the upper surface of the circuit board described above in the first direction, and the lower core 120 can be defined as the core located closest to the upper surface of the circuit board in the first direction. The upper core 110 and the lower core 120 may have a shape that is symmetrical to each other up and down, that is, in the first direction, or may have an asymmetric shape. However, in the following description, it is assumed that the shape is vertically symmetrical for convenience of explanation.

The upper core 110 and lower core 120 can each be divided into a plurality of segment cores. That is, as shown in FIGS. 1 to 4, the upper core 110 and the lower core 120 can be segmented into first cores and second cores in the y-axis direction, respectively. At this time, the lengths of the first core and the second core in the y-axis direction may be the same. Here, the concept is that the length of each core in the y-axis direction is ‘the same.’ Considering the tolerances that occur during the molding and processing of each core, the y-axis length between each core is less than 1%. They can be considered to be included in the same category as each other. Accordingly, the length of the first upper core 110-1, the second upper core 110-2, the first lower core 120-1, and the second lower core 120-2 in the y-axis direction is the same. And at this time, the allowable deviation of the lengths in the y-axis direction may be less than 1%. Additionally, as shown in FIGS. 5A to 5D, the upper core 110 and lower core 120 may each be divided into three segment cores. Of course, it is natural that division into three or more is possible. Additionally, although not shown, only the upper core 110 may be divided into a plurality of segment cores, or only the lower core 120 may be divided into a plurality of segment cores. Alternatively, the number of segment cores of the upper core 110 and the number of segment cores of the lower core 120 may be arranged differently. Alternatively, the segment core sizes of the upper core 110 and lower core 120 may be arranged differently. Alternatively, as shown in FIGS. 5A and 5B, the y-axis direction lengths of each of the divided upper cores 110 may be configured to be equal to each other, or each of the divided upper cores 110 may be configured as shown in FIGS. 5C and 5D. The lengths in the y-axis direction may be configured to be different from each other, and the respective separation distances between the divided upper cores 110 may be arranged the same or different from each other.

At this time, the core portion 100 may be divided in a second direction (y-axis or z-axis direction) that intersects the first direction (x-axis direction) as shown, and hereinafter, for convenience, the z-axis direction is Let's call it the third direction.

Again, referring to FIGS. 1 to 4, the minimum separation distance sd110 between the divided upper cores 110, that is, between the plurality of upper segment cores, is the distance between the divided upper cores 110 in the second direction of the first upper core 110-1. The sum of the length and the length of the second upper core 110-2 in the second direction may be defined as follows [Equation 1].

Here, the minimum separation distance (sd110) between the plurality of upper segment cores exceeding '0%' means that there is an air gap in the state where the first upper core 110-1 and the second upper core 110-2 are divided. This may mean that they are spaced apart from each other by a minimum distance with an air gap in between. In addition, as it approaches '0%', a fastening part (CP), which will be described later, is omitted in the space where the first upper core 110-1 and the second upper core 110-2 are spaced apart from each other, or the first upper core (110-1) ( This may mean that the fastening portion is covered by the second upper core 110-1) and the second upper core 110-2. The upper core 110 according to the present invention can increase the leakage inductance value by applying a divided core. In other words, the minimum separation distance sd110 between the plurality of upper segment cores is the sum of the length of the first upper core 110-1 in the second direction and the length of the second upper core 110-2 in the second direction. From the point where it exceeds '0%', that is, when the first upper core 110-1 and the second upper core 110-2 are divided, an additional leakage inductance value is generated, and as the separation distance increases, the leakage The inductance value also increases at the same time. However, the minimum separation distance between the plurality of upper segment cores exceeds 8.75% of the sum of the length of the first upper core 110-1 in the second direction and the length of the second upper core 110-2 in the second direction. In this case, there is no change in the leakage inductance value, but as the second direction winding length of the coil unit 200 increases, the coil resistance value, that is, the direct current resistance (DCR) value increases, which reduces the efficiency of the transformer. bring about

Meanwhile, since the present invention has a structure that omits the upper and lower surfaces of the bobbin portion, bobbin rigidity can be increased through the arrangement of a plurality of ribs, which will be described later. Therefore, when applying the structure of the fastening portion (CP) formed by fastening a plurality of rib ends, the rigidity of the bobbin can be further increased. To this end, the length of the fastening portion CP in the second direction, that is, the distance between the first upper core 110-1 and the second upper core 110-2, can be configured to be at least 0.1 mm.

In addition, the minimum separation distance (sd120) between the divided lower cores 120, that is, between the plurality of lower segment cores, is also the length of the first lower core 120-1 in the second direction and the second lower core 120-2. ) can be defined as follows [Equation 2] for the sum of the lengths in the second direction.

In addition, the lower core 120 has a structure that faces the upper core 110 in the first direction, and the description of the minimum separation distance between the plurality of lower segment cores is the description of the minimum separation distance between the upper segment cores described above. You can refer to .

Meanwhile, the minimum separation distance between each segment core of the upper core 110 or lower core 120 may be, for example, 0.1 mm or more and 7 mm or less, and preferably 0.5 mm or more and 5 mm or less. there is. As the separation distance between the upper core 110 and the lower core 120 increases, the value of the leakage inductance increases, but when the separation distance exceeds 5 mm, the leakage inductance value becomes saturated. In addition, as the separation distance exceeds 7 mm, the coil resistance value increases due to an increase in the second direction winding length, which reduces the efficiency of the transformer. Therefore, the separation distance can be designed up to 7 mm, but considering the leakage inductance value, it can be designed up to 5 mm. It is desirable to configure

In addition, a part of the bobbin portion 300, that is, a fastening portion (CP), may be placed in the space spaced between the upper core 110 and the lower core 120, so that the space between the upper core 110 and the lower core 120 The separation distance can also be understood as the thickness of the fastening part (CP). Therefore, in order to secure the rigidity of the bobbin portion 300 for supporting the upper core 110 and lower core 120, it is desirable to secure a separation distance of at least 0.5 mm or more between the upper core 110 and lower core 120. do. In addition, as the separation distance between the upper core 110 and the lower core 120 increases, the rigidity of the bobbin unit 300 can be secured, but as the separation distance exceeds 5 mm, the coil increases as the second direction winding length increases. As the resistance value increases, the efficiency of the transformer may decrease.

Therefore, in order to secure the leakage inductance and the rigidity of the bobbin portion 300, it is preferable that the separation distance between the upper core 110 and the lower core 120 is 0.5 mm or more and 5 mm or less.

The transformer applied to the present invention is for finely controlling the leakage inductance, and as described above, the leakage inductance can be adjusted by configuring the core portion 100 not as one but as a plurality of segment cores. In other words, a clearance distance is created between the divided cores, and through this, the electrical characteristics of the transformer can be finely adjusted. In addition, the leakage inductance can be adjusted by configuring the upper core 110 and the lower core 120 to have different thicknesses (lengths in at least one direction among the x-axis, y-axis, and z-axis). Accordingly, at least one of the number of divisions of the core portion 100, the division direction, the division interval, and the thickness of the core portion 100 can be adjusted according to the required leakage inductance value. In addition, since the core portion 100 can be manufactured by dividing it, for example, when used in a large-capacity transformer applied to a large-capacity TV, heat generation due to core shape imbalance can be controlled and the product yield of the core can be improved.

A portion of the bobbin portion 300, that is, a fastening portion CP, may be disposed between the plurality of divided segment cores. It is possible to keep the space between the divided segment cores empty, but by placing a fastening part (CP) between the divided segment cores, when using a transformer, the segment cores come into contact with each other, causing chipping or cracks in the core. You can prevent problems from occurring. Therefore, it is desirable to place a portion of the bobbin portion 300 between the divided segment cores, and for example, a fastening portion CP may be disposed. Although not shown, the fastening part CP may be divided into an upper fastening member and a lower fastening member. The upper fastening member may be disposed in a divided area between the first upper core and the second upper core, and the lower fastening member may be disposed in a divided area between the second lower core and the second lower core. At this time, if the number of segments of the upper core and the number of segments of the lower core are different from each other, only the upper fastening member or only the lower fastening member may be disposed. Meanwhile, when the number of upper cores and the number of lower cores are the same, the positions of the upper fastening members and the lower fastening members may at least partially overlap each other in the first direction. More preferably, the width of the upper fastening member in the second direction and the width of the lower fastening member in the second direction may correspond to each other and overlap each other in the first direction.

Referring to FIGS. 2 and 4 , a first outer foot 111 that protrudes downward in the first direction and extends along the second direction may be disposed on one side of the upper core 110 in the third direction. Additionally, a second outer foot 112 that protrudes downward in the first direction and extends along the second direction may be disposed on the other side of the upper core 110 in the third direction. Additionally, a midfoot portion 113 that protrudes downward in the first direction and extends along the second direction may be disposed between the first outer foot portion 111 and the second outer foot portion 112. The first outer foot portion 111, the second outer foot portion 112, and the midfoot portion 113 may be arranged parallel to each other. Additionally, the width of the first outer foot 111, the second outer foot 112, and the midfoot 113 in the z-axis direction may be the same or different. Meanwhile, a first outer foot portion 121, a second outer foot portion 122, and a midfoot portion 123 may be disposed in the lower core 120 to face the upper core 110.

The core portion 100 may further include a first space 130 and a second space 140. The first space 130 is formed between the first outer foot portions 111 and 121 and the midfoot portions 113 and 123, and can accommodate a portion of the coil portion 200 and the bobbin portion 300, which will be described later. The second space 140 is formed between the second outer foot portions 112 and 122 and the midfoot portions 113 and 123, and is located on the opposite side of the z-axis of the portion of the coil portion 200 and bobbin portion 300, which will be described later. The placed tabu can be accommodated. Accordingly, the first space 130 and the second space 140 may be formed to correspond to the thickness and spacing of the portion and other portions of the coil portion 200 and the bobbin portion 300 that are accommodated. The inductance of the core portion 100 can be controlled by adjusting the sizes of the first space 130 and the second space 140, and the transformer is adjusted according to the number of the first space 130 and the second space 140. Heat generation can be controlled. The core portion 100 may include a magnetic material, for example, iron or ferrite, but is not necessarily limited thereto.

The coil unit 200 may include a primary coil 210 and a secondary coil 220. The primary coil 210 and secondary coil 220 may have different thicknesses. At this time, the primary coil 210 and the secondary coil 220 may each have the same thickness.

At least a portion of the primary coil 210 may be arranged in a donut shape within the core portion 100. That is, as described above, a portion and other portions of the primary coil 210 may be accommodated in the first space 130 and the second space 140. The primary coil 210 can secure the withstand voltage of the transformer by applying an insulating coated wire. When developing magnetic components such as transformers, there are withstand voltages required for each developed product. In general, withstand voltage requires a certain multiple of the operating voltage of the relevant component. Accordingly, in the case of parts wound using conventional USTC wires, an insulation distance is created to satisfy the withstand voltage, thereby securing the withstand voltage. At this time, the insulation distance that must be secured is determined by the standard. For example, if the required withstand voltage of a transformer called 'A', that is, the withstand voltage between the primary and secondary coils is 4 kV or more, the primary coil must be It must be designed so that the shortest distance between the coil and the secondary coil is 4 mm or more. However, the parts mentioned here are made using USTC wire, PCB, and copper plates.

On the other hand, in the present invention, the surface of each wire was coated with an insulating resin multiple times to ensure that each wire was electrically independent, thereby securing and strengthening the withstand voltage characteristics. The cross section of the insulating coated wire applied to the present invention is not shown, but the surface of each wire is coated with two or more layers, preferably three or more layers of insulating resin, which can strengthen the withstand voltage and increase the overall strength of the winding form. , Based on this, the overall rigidity of the transformer can also be improved.

The secondary coil 220 is disposed along the outer circumferential direction in the winding direction of the primary coil 210, and has a portion and other portions together with the primary coil 210 in the first space 130 and the second space 140. It can be accepted. The secondary coil 220 may be wound by arranging a plurality of secondary windings in a single layer or multiple layers. The secondary coil 220 can be wound by turning the entire coil over once, and a detailed description of this will be provided later. The coil unit 200 is wound around the bobbin unit 300 in a donut shape, and at least a portion of the coil unit 200 may be disposed within the core unit 100 .

Figure 6 is an exploded perspective view of the bobbin part according to the present invention, Figure 7a is a plan view showing the bobbin part according to the present invention, Figure 7b is a cross-sectional view of part A-A of Figure 7a, Figure 7c is a cross-sectional view of part B-B of Figure 7a, FIG. 7D is a cross-sectional view of portion C-C of FIG. 7A.

The bobbin unit 300 according to the present invention will be described with reference to FIGS. 6 to 7 (FIGS. 7A to 7D) along with FIGS. 2 and 4. For convenience of explanation, the first direction is shown with respect to FIG. 6. The x-axis direction, the second direction is called the y-axis direction, and the third direction is called the z-axis direction, the upper left diagonal direction in the y-axis direction is called one side or one end, and the opposite y-axis direction is called the lower right diagonal direction as the other side. Or, it should be called the other group. In addition, the upper part of the x-axis direction is called upper, top, and upper side, and the lower part of the x-axis direction is called lower, lower, and lower side.

The bobbin portion 300 is a part where the core portion 100 and the coil portion 200 are coupled, and the first end (FP) is disposed on one side in the second direction and the second end (SP) is disposed on the other side. , a bobbin middle portion (drawing number not shown) may be disposed between the first end (FP) and the second end (SP). Therefore, the remaining portion excluding the first end (FP) and the second end (SP) can be understood as the bobbin middle portion. The core portion 100 may be disposed in at least a portion of the middle portion of the bobbin.

The bobbin unit 300 may be composed of a plurality of pieces, for example, may be composed of three pieces. That is, the bobbin unit 300 may include a first bobbin 310, a second bobbin 320, and a third bobbin 330.

The first end FP disposed on one side of the first bobbin 310 has a rectangular parallelepiped shape and an inner receiving groove 314 may be formed in one side of the second direction. A coil draw-out portion 312 may be formed on the upper portion of the inner receiving groove 314, that is, on the upper surface of the first end FP in the first direction. The coil draw-out unit 312 may be comprised of a plurality, for example, of two. The coil draw-out portion 312 may be configured in the form of a groove formed in one direction on the other side of the upper surface of the first end FP, and the end in one direction is bent in the third direction (z-axis direction) to extend a predetermined length. can be formed. At this time, when two coil pull-out portions 312 are configured, in order to secure an insulating distance between the pull-out coils, the coils may be bent in opposite directions to extend a predetermined length. The coil draw-out portion 312 may facilitate drawing and fixing the first bobbin 310 upward in the x-axis direction with respect to the end of the conductive wire constituting the primary coil 210. At this time, the coil lead-out portion 312 is an area where the end of the conductive wire of the primary coil 210 is disposed, and may be described interchangeably with the first terminal portion. In addition, the end of the conductive wire of the primary coil 210 that passes through the coil lead-out portion 312 is disposed at a position lower than the maximum height of the upper core 110, which can contribute to slimming the transformer.

Meanwhile, the coil unit 200 may also be composed of a first end, a second end, and a coil middle part corresponding to the bobbin unit 300, and the first end of the coil unit 200 is the first end of the bobbin unit 300. It can be placed by inserting into the end portion (FP), that is, the inner receiving groove 314.

A first fastening member 311 may be disposed on the other side of the first bobbin 310. The first fastening member 311 includes two horizontal frames spaced apart in a first direction and extending along a third direction, and two frames respectively connected in the first direction from both ends of the two horizontal frames. It may be configured in the form of a quadrangular frame that is combined to form a hole in the second direction. At this time, support protrusions 311-2 may be formed at the lower portions of both inner sides of the quadrangular frame. Some of the secondary coils 220 may be seated on the support jaw 311-2.

Additionally, the width formed in the second direction of the first fastening member 311 may correspond to the width between divided segment cores. In addition, both sides of the first fastening member 311 in the third direction may form a seating groove 311-1 from the other side in the second direction to one side.

In addition, both sides of the inner receiving groove 314 in the third direction and both sides of the first fastening member 311 in the third direction may be connected by a first rib 313, and the vertical thickness of the first rib 313 in the first direction is may correspond to or be greater than the thickness of the coil portion 200.

The second bobbin 320 may have a second fastening member 321 formed on one side, and a coil support portion 325 for inserting/extracting the primary coil 210 and the secondary coil 220. The coil support portion 325 is an area where the end of the secondary coil 220 is disposed and may be described interchangeably with the second terminal portion. At this time, the other side of the primary coil 210 may be placed below the coil support part 325.

The second fastening member 321 may be arranged to be inserted into the square frame of the first fastening member 311. The second fastening member 321 includes an upper frame 321-1 extending from the top in the first direction to the third direction, and a support piece extending from both sides of the upper frame 321-1 in the third direction to the bottom in the first direction ( 321-2) may be included. When the second fastening member 321 and the first fastening member 311 are combined, the upper frame 321-1 is disposed on the inner upper part of the square frame, and the support piece 321-2 is located in the seating groove 311. -1) can be supported by contact.

In addition, both sides of the coil supporter 325 in the third direction and both sides of the second fastening member 321 in the third direction may be connected to each other by 2-2 ribs 323, and each 2-2 rib The 2-1 rib 322 may be disposed at a certain distance inward from 323 in the third direction. Here, the constant interval may be an interval corresponding to the width of the secondary coil 220 in the third direction. The vertical thickness of the 2-1 rib 322 and the 2-2 rib 323 in the first direction may also correspond to or be greater than the vertical thickness of the coil portion 200 in the first direction.

Additionally, a first fastening means 321-3 in the form of a hook extending toward the other lower side may be formed on the upper frame 321-1.

The third bobbin 330 may have a seating support portion 333 formed on one side in the second direction and a third fastening portion 331 formed on the other side in the second direction. The seating support portion 333 is a portion that is inserted into the inner receiving groove 314 of the first bobbin 310 while one side of the coil portion 200 in the second direction is seated and supported. Accordingly, the vertical thickness of the seating support portion 333 in the first direction may be configured in consideration of the vertical length of the inner receiving groove 314 in the first direction.

The seating support portion 333 may include a first seating portion 333-1, a second seating portion 333-2, a support portion 333-3, and a guide bar 333-4. However, in the case of the second seating portion 333-2, it is not visible from the angle in the drawing of FIG. 6, so it can be confirmed with reference to FIG. 11.

The first seating portion 333-1 is a portion where one side of the primary coil 210 in the second direction is seated and supported while maintaining the donut-shaped winding form, and has a shape corresponding to the shape of one side of the primary coil 210. It can be configured.

The second seating portion 333-2 is a portion in which one side of the secondary coil 220 that maintains the winding shape in the second direction is contacted and supported while being wound. The second seating portion 333-2 is a portion of the secondary coil 220 that maintains the winding shape. ) can be formed to have a radius corresponding to one side of. At this time, the secondary coil 220 may be coupled to the second seating portion 333-2 in an entirely inverted state, and the structure in which the secondary coil 220 is seated in an inverted state will be described later. The first seating portion 333-1 and the second seating portion 333-2 may be inserted into the inner receiving groove 314 of the first bobbin 310.

At least a portion of the third fastening part 331 may be inserted into the square frame of the first fastening member 311. At this time, the third fastening part 331 may be inserted into the square frame of the first bobbin 310 in a state of fastening with the second fastening member 321 of the second bobbin 320. That is, the third fastening part 331 includes a lower frame 331-1 extending from the lower part of the first direction in the third direction, and extends from the center area of the lower frame 331-1 to the upper first direction. Afterwards, a second fastening means 331-2 in the form of a hook extending to one side in the second direction may be formed. The second fastening means 331-2 may be combined with the first fastening means 321-3 of the second bobbin 320 and disposed inside the square frame of the first fastening member 311. Additionally, a groove may be formed at the bottom of the second fastening means 331-2. At this time, the first fastening member 311, the second fastening member 321, and the third fastening part 331 combined with each other may form a fastening part CP. The length extending in the third direction of the lower frame 331-1 may correspond to the distance between the 2-1 ribs 322. A third rib 332 is disposed extending in the second direction between the third fastening portion 331 and the seating support portion 333, and the third rib 332 is the 2-1 rib 322 along the second direction. and at least a portion may overlap in a third direction.

When the bobbin part 300 including the above-described first bobbin 310, second bobbin 320, and third bobbin 330 is combined, it can be configured as shown in Figure 7a, and Figure 7a shows the bobbin according to the present invention. It shows the rich and poor 300 looking down from the top.

7A , the bobbin unit 300 according to the present invention has the first end (FP) of the first bobbin 310 disposed on one side (left side) in the second direction, and the first end (FP) of the first bobbin 310 is disposed on the other side (right side) in the second direction. ), the second end (SP) may be disposed, and it is natural that the arrangement positions of the first end (FP) and the second end (SP) may be changed.

A bobbin middle portion may be disposed between the first end FP where the inner receiving groove 314 is formed and the second end SP including the coil support portion 325. The bobbin middle portion may be composed of a plurality of ribs 313, 322, 323, and 332 and a fastening portion (CP).

In FIG. 7A, only the first fastening member 311 is shown at the angle of the drawing, but it can be understood that the second fastening member 321 and the third fastening part 331 are coupled and disposed on the bottom of the first fastening member 311. You can. Meanwhile, the first fastening member 311 may form the overall skeleton of the fastening portion CP.

The plurality of ribs 313, 322, 323, and 332 may include a first rib 313, a 2-1 rib 322, a 2-2 rib 323, and a third rib 332, The explanation will be based on FIG. 7A.

First, the first ribs 313 may extend in the y-axis direction between the first end FP and the fastening portion CP and be arranged parallel to each other in the z-axis direction.

In addition, for convenience, if we describe the 2-2 rib 323 first, the 2-2 rib 323 extends in the y-axis direction between the second end (SP) and the fastening portion (CP) and is parallel to each other in the z-axis direction. They may be arranged so that at least part of them overlaps with the first rib 313 in the y-axis direction.

In addition, the 2-1 rib 322 may be arranged to be spaced apart from the 2-2 rib 323 in the inward direction and parallel to the z-axis at regular intervals, between the second end SP and the fastening portion CP. It can be arranged to extend in the y-axis direction. At this time, the 'constant interval' may be an interval corresponding to the width of the secondary coil 220 in the z-axis direction.

In addition, the third rib 332 may be arranged to be spaced apart from the first rib 313 in the inward direction at regular intervals parallel to the z-axis, and in the y-axis direction between the first end FP and the fastening portion CP. It can be extended and placed. At this time, the third rib 332 may at least partially overlap the 2-1 rib 322 in the y-axis direction.

In addition, the first rib 313 and the third rib 323 overlap each other at least partially in the z-axis direction, and the 2-1 rib 322 and the 2-2 rib 323 overlap at least in the z-axis direction. Some may overlap with each other.

The plurality of ribs (313, 322, 323, 332) described above may be disposed in the x-axis direction while forming through holes (315, 324, 326, 334), and the through holes (315, 324, 326, 334) The first outer foot portions 111 and 121, the second outer foot portions 112 and 122, and the midfoot portions 113 and 123 of the above-described core portion 100 may be disposed while penetrating. Accordingly, the first rib 313 and the third rib 332 of the bobbin portion 300 are accommodated in the first space 130 of the above-described first core, and the second space 140 of the first core is also accommodated. The first rib 313 and the third rib 332 can be accommodated. In addition, the 2-2 rib 323 and the 2-1 rib 322 are accommodated in the first space 130 of the second core, and the 2-2 rib is also accommodated in the second space 140 of the second core. (323), it can be understood that the 2-1 rib (322) is accepted.

FIGS. 7B to 7D are cross-sectional views of portions A-A, B-B, and C-C of FIG. 7A, showing the connection state and structure of the fastening portion CP.

First, referring to FIG. 7B together with FIG. 7A, the third fastening part 331 connected to the third bobbin 330 may include a lower frame 331-1 and a second fastening means 331-2. . Additionally, the second fastening member 321 connected to the second bobbin 320 may include an upper frame 321-1 and a first fastening means 321-3. The first fastening means 321-3 may be a groove formed from the center of the upper frame 321-1 in the z-axis direction to the lower part in the x-axis direction, and the end of the formed groove is directed to the other side in the y-axis direction (right side in Figure 7b) May include bent shapes. The second fastening means 331-2 is disposed at the center of the lower frame 331-1 in the z-axis direction and extends upward in the x-axis direction, and the extended end is bent to one side in the y-axis direction (left side in Figure 7b). May include shapes. At this time, the lower end of the second fastening means 331 may be formed with a groove to accommodate the end bent toward the other side of the groove in the y-axis direction (right side in FIG. 7B) of the first fastening means 321-3. That is, as shown in the enlarged view of FIG. 7B, the first fastening means 321-3 and the second fastening means 331-2 are crossed in a staggered state and supported in contact with each other, and are attached to the first fastening member 311. It can be arranged so that the upper and lower parts in the x-axis direction are surrounded.

Next, referring to FIG. 7C together with FIG. 7A, an end of one side (left side of FIG. 7C) in the y-axis direction of the 2-1 rib 322 may be formed to be inclined. Additionally, the other end of the third rib 332 in the y-axis direction (right side in FIG. 7C) may be formed to be inclined to correspond to the end of the second-1 rib 322 in the y-axis direction. That is, as shown in the enlarged view of Figure 7c. The 2-1 rib 322 and the third rib 332 may be arranged with the inclined surfaces of each end in contact with each other and the upper and lower portions in the x-axis direction surrounded by the first fastening member 311. Although not shown, it goes without saying that each rib is formed in a direction opposite to the inclination shown in FIG. 7C so that the ends of each rib come into contact with each other. At this time, the 2-1 rib 322 and the third rib 332 may be arranged to overlap at least part of the y-axis direction.

In addition, referring to FIG. 7D together with FIG. 7A, a first fastening member 311 may be formed at the end of the other side (right side of FIG. 7D) in the y-axis direction of the first rib 313. A seating groove 311-1 open toward the other side in the y-axis direction may be formed at the upper and lower portions of the first fastening member 311 in the z-axis direction. At one end of the 2-2 rib 323 in the y-axis direction (left side in Fig. 7d), support pieces 321-2 inserted and supported in the seating grooves 311-1 in the upper and lower parts in the z-axis direction will be formed, respectively. You can.

The bobbin portion 300 according to the present invention forms through holes 315, 324, 326, and 334 in the x-axis direction in the middle portion of the bobbin, excluding the first end (FP) and the second end (SP), so that Although it has a structure in which the upper and lower surfaces are omitted, the overall rigidity of the bobbin portion 300 can be maintained and improved by applying the multiple ribs 313, 322, 323, and 332 and the fastening portion (CP) structure described above. You can.

Figure 8 is a perspective view showing a state in which the core portion is removed from the transformer of the present invention, Figure 9 is a perspective view showing a state in which the first bobbin is removed in Figure 8, and Figure 10 is a perspective view showing a state in which the secondary coil is composed of two rows in Figure 9. , and Figure 11 is a perspective view showing the third bobbin according to the present invention, and Figures 8 to 11 are shown to show the arrangement structure and coupling state of the coil part disposed in the bobbin part applied to the present invention.

First, referring to FIG. 8, the coil unit 200 consisting of the primary coil 210 and the secondary coil 220 is formed at the first end (FP) of the bobbin unit 300 while maintaining the winding form in a donut shape. ), one end (lower left diagonal direction) may be disposed, and the other side (upper right diagonal direction) end may be disposed at the second end SP of the bobbin unit 300. In addition, the coil middle portion excluding the one end and the other end of the coil portion 200 is the bobbin middle portion of the bobbin portion 300, that is, the first end (FP) and the second end (SP) of the bobbin portion 300. It may be disposed in areas where the first rib 313, the 2-1 rib 322, the 2-2 rib 323, and the third rib 332 are disposed. At this time, the primary coil 210 is disposed in the bobbin unit 300 while maintaining the winding form in a donut shape along the y-axis plane, and the secondary coil 220 is located around the outer periphery of the primary coil 210 in the winding direction. Accordingly, it can be placed while maintaining the winding form. That is, the primary coil 210 has a width corresponding to the width in the z-axis direction of the first fastening means 321-3 and the second fastening means 331-2 and is wound in a donut shape to form the primary coil 210. ) is disposed inside the first end (FP) of the bobbin portion 300, and the other end of the primary coil 210 is disposed inside the second end (SP) of the bobbin portion 300, 1 The coil middle portion of the primary coil 210 may be disposed along the inner peripheral surfaces of the 2-1 rib 322 and the third rib 332 in the z-axis direction. In addition, the secondary coil 220 is connected to the outer circumference of the primary coil 210 in the winding direction, that is, one end of the secondary coil 220 is inside the first end FP of the bobbin unit 300. The 2-1 rib 322 and the third rib 332 are disposed along the outer circumference of the secondary coil 220 and at least partially overlap the coil middle portion of the secondary coil 220 in the y-axis direction and the y-axis. It may be disposed between the first rib 313 and the 2-2 rib 323, which are disposed to overlap at least a portion in the direction. At this time, the first rib 313 and the 2-2 rib 323 correspond to the winding width of the secondary coil 220 in the z-axis horizontal direction from the 2-1 rib 322 and the third rib 332. Or it can be placed at regular intervals over a larger width. Meanwhile, the secondary coil 220 disposed inside the second end (SP) of the bobbin unit 300 may be supported by the coil support unit 325 and guided to the outside of the second bobbin 320.

In addition, one end of the coil portion 200 is inserted into the inner receiving groove 314 of the first bobbin 310 while being inserted into the seating support portion 333 of the third bobbin 330, and the inserted inner structure is shown in FIG. Please refer to 9 for explanation.

FIG. 9 shows a state in which the first bobbin 310 in FIG. 8 has been removed. Before explaining based on FIG. 9, since all related components to be explained and their drawing numbers are not shown in FIG. 9, the description will be made with reference to FIGS. 2 and 6. One end of the primary coil 210 of the above-described coil units 200 may be seated on the first seating unit 333-1 of the seating support unit 333. The first seating portion 333-1 has a radius corresponding to the inner radius of the primary coil 210 and has a width in the z-axis direction of the first fastening means 321-3 and the second fastening means 331-2. A seating protrusion (P1) having a width corresponding to may be formed. At this time, a mounting protrusion (P2) corresponding to the seating protrusion (P1) may be formed at the lower portion of the coil support portion 325 of the second bobbin 320 in the x-axis direction. The other end of the primary coil 210 may be inserted into and supported on the mounting protrusion P2. By forming the seating protrusion (P1) and the holding protrusion (P2) in this way, it is possible to maintain the winding form and solve the problem of short circuiting between the wires of the primary coil 210 and the secondary coil 220.

In addition, the secondary coil 220 applied to the present invention is not a method in which a plurality of wires are wound around the bobbin portion 300, but a seating support disposed on one side (lower left diagonal direction) of the third bobbin 330 ( The entire secondary coil 220 may be wound along the outer circumference of the second seating portion 333-2 of 333) in a flipped state. That is, the wire wound on the outside of the secondary coil 220 can be turned over once around the second seating portion 333-2 and wound on the inside of the secondary coil 220, and the secondary coil The wire wound on the inside of 220 may be turned over once around the second seating portion 333-2 and wound on the outside of the secondary coil 220. In this way, the entire secondary coil 220 is flipped once to change the inner and outer directions of the current flow direction, thereby controlling the inductance deviation caused by the length difference between the wires. Since this variation in inductance ultimately causes heat generation when driving the transformer, the overall temperature of the transformer can be lowered through this embodiment. However, an external force may be applied to the wire at the point C1 where the secondary coil 220 is once flipped, and the withstand voltage may be weakened as, for example, the coating is peeled off. Therefore, in order to solve this problem, an inner receiving groove 314 is formed in the first bobbin 310, and one end of the primary coil 210 and the secondary coil 220 is wound on a seating support portion 333. ) can be applied by inserting it into the inner receiving groove 314 so that it is not exposed.

Additionally, the second seating portion 333-2 may include a pair of support portions 333-3 that are spaced apart from one side in the z-axis direction and the other side in the x-axis direction and respectively protrude in the z-axis direction. A secondary coil 220 may be disposed between the spaced apart supports 333-3. At this time, the secondary coil 220 disposed on the support part 333-3 formed on one side of the second seating part 333-2 (in the upper left diagonal direction in FIG. 9) is flipped once and the guide bar 333 -4), while being guided by contact with the upper part in the x-axis direction or the lower part in the x-axis direction, it can be guided to the support part 333-3 formed on the other side of the second seating part 333-2.

In addition, as shown in FIG. 10, when the secondary coil 220 is configured in two or more rows up and down in the x-axis direction, the secondary coil 220 flipped over as described above through the guide bar 333-4 It can be divided into upper and lower sections and guided to the support portion 333-3 formed on the other side of the second seating portion 333-2.

Figure 11 is shown to understand the structure of the support part 333-3 and the guide bar 333-4 of the third bobbin 330, and the separation distance in the x-axis direction between the support parts 333-3 is the secondary coil ( 220) may correspond to or be greater than the x-axis direction thickness. Additionally, the guide bar 333-4 may protrude in the z-axis direction from the other side of the second seating portion 333-2 along the winding direction of the secondary coil 220. The protruding length of the guide bar 333-4 may be smaller than or equal to the protruding length of the support bar 333-3 disposed on the other side of the second seating portion 333-2. The protruding position of the guide bar 333-4 may be disposed between each support portion 333-3 in the y direction. The shape of the guide bar 333-4 can be configured in various shapes, for example, it can be configured in a rod shape.

Figure 12a is a plan view of the shape of the secondary coil wound on the seating support portion of the primary bobbin in the embodiment shown in Figure 9, viewed from the This is an example diagram showing the state in which the primary coil is placed.

As shown in FIG. 12A, a plurality of secondary coils L1, L2, L3, and L4 drawn out in the direction of the support portion 333-2 of the first bobbin are sequentially arranged side by side from the inside to the outside. The secondary coil drawn into the support part 333-3 formed on one side of the second seating part 333-2 is turned over once on the outside of the first bobbin and the support part formed on the other side of the second seating part 333-2 ( 333-3). As shown in Figure 12b, between the first outer foot portion 111 and the midfoot portion 113, a plurality of secondary coils (L1, L2, L3, L4) are formed from the inside to the outside of L1, L2, L3, and L4. are placed in order. At this time, the plurality of secondary coils are adhered by an adhesive member to minimize the gap between each coil. A plurality of secondary coils (L1, L2, L3, L4) that are turned over once on the outside of the first bobbin and are introduced into the support portion (333-3) formed on the other side of the second seating portion (333-2) are moved from the inside to the outside. It is placed in the following order: L1, L2, L3, L4. That is, unlike the prior art in which the secondary coil disposed on the outermost side of one side of the bobbin is symmetrically disposed on the outermost side of the other side of the bobbin, the secondary coil disposed on the outermost side of the bobbin is turned over once on the outside of the bobbin. It can be introduced into the innermost part of the bobbin. Likewise, the secondary coil disposed on the innermost side of the bobbin is flipped once on the outside of the bobbin and then retracted into the outermost side of the bobbin.

Figure 13a is a plan view of the shape of the secondary coil wound on the seating support of the primary bobbin in the embodiment shown in Figure 10, viewed from the x-axis direction, and Figure 13b is an example in which the secondary coil is composed of two rows, within the core. This is an example diagram showing the state in which the primary coil is placed. Figures 13a and 13b show an embodiment in which the secondary coils are arranged in multiple layers to form two rows.

As shown in FIG. 13A, on one side of the first bobbin, a plurality of secondary coils (L11, L21, L12, L22, L13, L23, L14, L24, L15, L25, L16, L26) are formed in multiple layers in the first direction. ) are arranged sequentially from the inside to the outside based on the center of the bobbin. As shown in FIG. 13B, the upper coil between the midfoot portions 113 and 123 and the first outer foot portions 111 and 121 extends from the inner side where the midfoot portions 113 and 123 are disposed, L11, L12, L13, and L14. , L15, and L16, and the lower coils are arranged in the order of L21, L22, L23, L24, L25, and L26 from the inner side where the midfoot portions 113 and 123 are located. The secondary coil introduced into the support part 333-3 formed on one side of the second seating part 333-2 is turned over once on the outside of the first bobbin. At this time, the secondary coil is flipped in opposite directions at the top and bottom of the first direction. That is, the secondary coils (L11 to L16) disposed at the top are turned over in the order of L16, L15, L14, L13, L12, and L11 from the top in the first direction, while the secondary coils (L21 to L26) disposed at the bottom ) is turned over in the order of L21, L22, L23, L24, L25, and L26 from the top in the first direction. The upper secondary coils (L11 to L16) and lower secondary coils (L21 to L26), which are turned over once on the outside of the primary bobbin, are introduced into the support portion (333-3) formed on the other side of the second seating portion (333-2). do. At this time, it is separated around the guide bar 333-4 protruding toward the other side of the second seating portion 333-2 and is introduced into the other side of the first bobbin. As shown in FIG. 13B, the upper secondary coils (L11 to L16) inserted between the midfoot portions 113 and 123 and the second outer foot portions 112 and 122 are located on the inner side where the midfoot portions 113 and 123 are disposed. It is placed in the order of L16, L15, L14, L13, L12, and L11, and the lower secondary coil is placed in the order of L26, L25, L24, L23, L22, and L21 from the inner side where the midfoot portions 113 and 123 are disposed. It is brought in and placed.

Meanwhile, the transformer according to the above-described embodiment can secure a high leakage inductance value while implementing a slimmed down structure of the bobbin portion 300, so a circuit board on which such a transformer is placed can be used to display a display device, for example, a flat panel. A type TV can be provided.

In addition, the transformer according to the above-described embodiment can prevent current from flowing in a direction with low inductance as the inductance deviation after winding is reduced.

Although the description has been made focusing on the embodiments above, this is only an example and does not limit the present invention, and those skilled in the art will understand that the examples are as follows without departing from the essential characteristics of the present embodiments. You will see that various variations and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

FP: first end SP: second end
CP: fastener
100: core part 110: upper core
111: first outer foot 112: second outer foot
113: midfoot 120: lower core
121: first outer foot 122: second outer foot
123: midfoot 130: first space
140: Second space
200: Coil unit 210: Primary coil
220: secondary coil
300: bobbin part 310: first bobbin
311: first fastening member 311-1: seating groove
31-2: Support jaw 312: Coil withdrawal portion
313: first rib 314: inner receiving portion
315: Through hole 320: 2nd bobbin
321: second fastening member 321-1: upper frame
321-2: Support piece 321-3: First fastening means
322: 2-1 rib 323: 2-2 rib
324: Through hole 325: Coil support
325-1: compartment 330: third bobbin
331: Third fastening portion 331-1: Lower frame
331-2: second fastening means 332: third rib
333: Seating support 333-1: First seating portion
333-2: second seating portion 333-3: support portion
333-4: Guide bar 334: Through hole

Claims (16)

A core portion including a first core and a second core disposed to be spaced apart from the first core;
A coil unit including a primary coil and a secondary coil disposed to be spaced apart from the primary coil; and
It includes a bobbin part, at least a portion of which is coupled to the coil part within the core part,
Each of the first core and the second core,
upper core; and
It includes a lower core disposed to face the upper core in a first direction,
The primary coil is,
One side of the first coil;
a first coil other side including one side of the first coil and a distal end positioned opposite to a second direction intersecting the first direction; and
A first coil intermediate portion between one side of the first coil and the other side of the first coil,
The secondary coil is,
One side of the second coil;
a second coil side including one side of the second coil and a distal end located opposite to the second direction; and
It includes a second coil intermediate portion between one side of the second coil and the other side of the second coil,
The primary coil and the secondary coil are arranged side by side in the second direction,
The bobbin part,
a first bobbin accommodating the other side of the first coil and one side of the second coil;
a second bobbin facing the first bobbin in the second direction and having the other side of the second coil and one side of the first coil disposed;
a first fastening member extending from the first bobbin toward the middle portion of the first coil and disposed at an end of the first bobbin; and
It includes; a second fastening member extending from the second bobbin toward the middle portion of the second coil and disposed at an end of the second bobbin;
The first fastening member and the second fastening member are fastened to each other to form a fastening portion,
The first core is disposed between the first bobbin and the fastening part,
A transformer in which the second core is disposed between the second bobbin and the fastening part. According to claim 1,
The fastening part is a transformer arranged to surround at least a portion of the first coil middle portion and at least a portion of the second coil middle portion. According to clause 2,
A transformer wherein at least a portion of the coupling portion is disposed outside the coil portion in a third direction that simultaneously intersects the first direction and the second direction. According to clause 3,
The bobbin part,
a plurality of first ribs connecting the first bobbin and the first fastening member; and
A transformer comprising a plurality of second ribs connecting the second bobbin and the second fastening member. According to clause 4,
A transformer wherein at least a portion of the first coil middle portion and at least a portion of the second coil middle portion are disposed between the plurality of first ribs and the plurality of second ribs in the third direction. According to claim 1,
The first coil middle portion and the second coil middle portion include a region directly facing the core portion in the first direction. According to claim 1,
The first bobbin is a transformer having a receiving groove in which the other side of the first coil and one side of the second coil are accommodated. According to claim 1,
A third bobbin is further accommodated in the receiving groove,
The third bobbin is a transformer having a seating support portion on which the other side of the first coil and one side of the second coil are disposed. According to clause 8,
The third bobbin includes a third fastening member extending toward the fastening part and disposed at an end of the third bobbin,
The third fastening member is a transformer fastened to at least one of the first fastening member and the second fastening member in the fastening part. According to clause 9,
The first fastening member, the second fastening member, and the third fastening member are at least partially overlapped with each other in the first direction. According to claim 10,
The bobbin part,
A transformer further comprising a plurality of third ribs connecting the third bobbin and the third fastening member. According to claim 11,
A transformer wherein the plurality of third ribs are disposed between the plurality of first ribs. According to claim 12,
A transformer in which at least a portion of the middle portion of the first coil is disposed between the plurality of third ribs. According to clause 8,
The seating support,
a first seating portion on which the other side of the first coil is disposed; and
A transformer comprising a second seating portion on which one side of the second coil is disposed. According to claim 1,
The first bobbin is,
A transformer including a coil pull-out portion formed so that at least a portion of the other side of the first coil is pulled out. The transformer according to any one of claims 1 to 15; and
A display device comprising: a circuit board on which the transformer is disposed.