KR101123996B1 - Transformer and display device using the same - Google Patents

Abstract

The present invention relates to a transformer in which the lead wires are spaced apart from each other so as to prevent a short circuit between the lead wires of the coil. To this end, the transformer according to the present invention includes a winding part in which a plurality of partition walls are formed on an outer circumferential surface of a tubular body part, and one end of the winding part. A base having at least one external connection terminal protruding to the outside, a plurality of coils wound on the winding part, and a lead wire connected to the external connection terminal, and a core forming a magnetic path electromagnetically coupled to the coil. The winding part may include at least one lead wire support part which protrudes outward from the partition wall and supports the lead wire through an end thereof and guides the lead wire to the external connection terminal.

Description

Transformer and display device having the same {Transformer and display device using the same}

The present invention relates to a transformer, and more particularly, to a transformer that can be arranged to be spaced apart from each other to prevent a short circuit between the leads of the coil.

Various electronic devices such as TVs, monitors, personal computers, and office automation (OA) devices require various power sources. Therefore, such an electronic device is generally provided with a device for converting the AC power supplied from the outside into the power required for each electronic application device, mainly switching transformer is used.

Generally, switching transformer converts 85 ~ 265V AC power into 3 ~ 30V DC power with high frequency oscillation of 25 ~ 100KHz. Therefore, the size of the core and bobbin can be significantly reduced compared to the general transformer which converts 85 ~ 265V AC power into 3 ~ 30V AC power with 50 ~ 60Hz frequency oscillation. Since low-voltage, low-current direct current power supplies can be stably supplied to electronic application devices, they are widely used in electronic application devices that have recently been miniaturized.

However, as the switching transformer becomes smaller, a short circuit occurs between the lead wires of the coils connected to the external connection terminals of the switching transformer.

In the case where a plurality of coils are wound around a single switching transformer, a plurality of lead wires are connected to an external connection terminal, and thus, the above problem is intensified.

An object of the present invention is to provide a transformer in which the lead wires of a coil wound on a small transformer can be easily connected to an external connection terminal without a short circuit occurring therebetween.

The transformer according to the present invention includes a winding unit in which a plurality of partitions are formed on an outer circumferential surface of a tubular body, a base provided at one end of the winding unit, and having at least one external connection terminal protruding to the outside, and wound on the winding unit. A plurality of coils connected to the external connection terminal, and a core forming a magnetic path for electromagnetic coupling with the coil, wherein the winding part is formed to protrude outward from the partition wall and supports the lead wire through an end thereof and the lead wire At least one lead wire support unit for guiding the external connection terminal may be provided.

In an embodiment according to the present invention, the partition wall includes a first partition wall disposed at a position adjacent to the other end of the winding part and a second partition wall spaced apart from the first partition wall at a predetermined interval and disposed adjacent to the base, The lead wire support part may be provided on at least one of the first and second partition walls.

In an embodiment of the present disclosure, the lead wire support part may be formed to protrude more than the lead wire support part provided in the first partition wall.

In the embodiment of the present invention, the lead wire support part may protrude in parallel with the arrangement direction of the external connection terminal.

In the embodiment according to the present invention, the coil is a primary coil and the first partition and the first winding wound around the space between the other end of the winding portion and the first partition wall, one end of the winding portion and the second partition wall, respectively It may include a secondary coil wound in the space between the two partitions.

In the embodiment of the present invention, the lead wires of the primary coil wound between the other end of the winding part and the first partition wall are supported by the lead wire support part protruding from the first partition wall and can be connected to the external connection terminal. have.

In an embodiment according to the present invention, the base may include a guide portion having a groove shape for guiding the lead wire to the external connection terminal.

In an embodiment according to the present invention, the lead wires of the primary coil wound in the space between one end of the winding part and the second partition wall may include at least one of the lead wire support part protruding from the second partition wall or the guide part of the base. It is supported by either one and can be connected to the external connection terminal.

In an embodiment according to the present invention, the primary coil or the secondary coil may include a plurality of coils electrically insulated from each other.

In an embodiment according to the present invention, the primary coil or the secondary coil includes at least one general insulation coil and at least one triple insulation coil, and the triple insulation coil is disposed at the outermost portion of the winding part. Can be wound as possible.

In an embodiment according to the present invention, the plurality of lead wire support portions may have different protruding distances from the barrier ribs.

In an embodiment according to the present invention, the plurality of lead wire support parts may include at least one guide groove into which the lead wire is inserted.

In an embodiment according to the present invention, the lead wire support portion may be formed in a curved portion in contact with the lead wire.

In an embodiment according to the present invention, the external connection terminal may be provided with a rigid reinforcement groove formed inside the groove in the longitudinal direction to reinforce the rigidity of the external connection terminal.

In the embodiment according to the present invention, the rigid reinforcement grooves may be grooves formed by press working.

In the embodiment according to the present invention, the portion where the rigid reinforcement groove is formed may have a higher density than other portions.

In the embodiment according to the present invention, when the lead wire of the coil is connected, at least one coil guide groove to which the lead wire is inserted and connected may be formed on the side.

In the embodiment of the present invention, the coil guide grooves may be formed on both side surfaces of the external connection terminal, respectively.

In an embodiment according to the present invention, the winding part has a flange portion protruding outward from both ends of the body portion, the base may be provided at one end of the flange portion.

In an embodiment according to the present invention, a coil carry-over part, which is a path connecting the lead wire to the outer surface of the flange part and connecting to the external connection terminal through an outer circumference of the flange part, may be further provided.

In an embodiment according to the present invention, the coil carry over part is disposed so that the lead wire carried through the carry over groove and the carry over groove which is a path through which the lead wire moves to the lower surface of the flange part crosses the outer surface of the flange part. It may include a crossing path which is a path to be.

In an embodiment according to the present invention, the coil carry over part may be a path formed between the base and a guide block formed to protrude in parallel with the base on an outer surface of the flange part.

In the embodiment according to the invention, the guide block, one end is formed so as to project outward from the outer periphery of the flange portion, the carry-over groove is formed by the protruding end and the base of the guide block and the flange portion It may be a groove formed.

In an embodiment according to the present invention, the base includes a guide portion having a groove shape for guiding the lead wire to the external connection terminal, and the lead wire may be connected to the external connection terminal via the guide part or the coil carry over part. have.

In an embodiment according to the present invention, the coil carry-over part is formed in a groove shape on the lower surface of the base, and at least one guide groove for switching the lead wire disposed in the transverse path in a direction in which the external connection terminal is arranged. It may further include.

In the embodiment of the present invention, the guide groove, the chamfered portion may be formed in the corner portion of the side wall in contact with the lead wire.

In addition, the transformer according to the present invention, a tubular body portion having a through hole therein and a winding portion having a flange portion protruding outward from both ends of the body portion, formed at one end of at least one of the flange portion and a plurality of external And a base on which a connection terminal is disposed, and at least one coil wound in a space formed by an outer circumferential surface of the body portion and one surface of the flange portion, wherein the lead wires of the coil portion are formed to prevent the crossover of the flange portion. Dispersed in one side and the other side may be fastened to the external connection terminal.

In addition, the transformer according to the present invention includes a winding portion in which a coil is wound and at least one external connection terminal protruding outward from one end of the winding portion, and the external connection terminal is formed in a groove shape along a longitudinal direction therein. It may be provided with a rigid reinforcement groove for reinforcing the rigidity of the external connection terminal.

In addition, the transformer according to the present invention includes a winding portion in which a coil is wound and at least one external connection terminal protruding outward from one end of the winding portion, wherein the lead wire is inserted when the lead wire of the coil is connected. At least one coil guide groove to be connected may be formed at the side surface.

In addition, the transformer according to the present invention, the winding portion is formed on the outer peripheral surface of the tubular body portion, the base is provided on one end of the winding portion and has at least one external connection terminal protruding to the outside, is wound on the bobbin And a core having a lead wire connected to the external connection terminal, and a core forming a magnetic path for electromagnetic coupling with the coil, wherein the coil includes at least one general insulation coil and at least one triple insulation coil, The triple insulation coil may be wound to be disposed at the outermost portion of the winding part.

In addition, the flat panel display device according to the present invention, the power supply unit is formed by mounting at least one of the transformer on the substrate, the display panel to receive power from the power supply, and a cover for protecting the display panel and the power supply It may be configured to include.

In the embodiment of the present invention, the coil of the transformer may be wound to be parallel to the substrate of the power supply unit.

In the transformer according to the present invention, the lead wires of the coil are arranged to be spaced apart by a predetermined interval by a lead wire support part formed to protrude horizontally outward from the partition wall. Therefore, even when a plurality of coil leads are connected to an external connection terminal in a narrow space, interference between the leads may be prevented or a short circuit may occur due to contact.

In addition, since the transformer according to the present invention has a rigid reinforcing groove formed in the external connection terminal, it is possible to prevent bending or breaking even when external force is applied to the external connection terminal in the process of connecting the lead wires of the coil to the external connection terminal.

In addition, in the transformer according to the present invention, the fixing force of the lead wire coupled to the external connection terminal is improved by the coil guide groove formed in the external connection terminal. Accordingly, since it is not necessary to connect the lead wire to the external connection terminal several times as in the related art, it is possible to simplify the wiring process of the lead wire and reduce the manufacturing cost as the amount of coil used is reduced.

In the transformer according to the present invention, the coil wound at the outermost side of the coils wound on at least one winding part uses a triple insulation coil. Accordingly, since insulation between the primary coil wound on the primary winding part and the secondary coil wound on the secondary winding part can be easily secured, the size of the partition wall separating the winding part can be minimized, thereby reducing the size of the bobbin. It can form smaller. This has the advantage that it is possible to manufacture a small transformer.

In addition, the transformer according to the invention is characterized in that it is configured to be suitable for an automated manufacturing method. That is, the transformer according to the present invention is configured to automatically wind the primary coil and the secondary coil to the bobbin, and the winding of the coil may be performed through a separate automatic winding facility. This has the advantage of significantly reducing the cost and time required for manufacturing.

In addition, the transformer according to the present invention includes a coil carryover part, which is a path through which the lead wire of the coil crosses the bobbin at the lower surface of the bobbin. That is, in the transformer according to the present invention, the coil may be connected to the external connection terminal through the lower surface as well as the upper surface of the base.

Therefore, the lead wires of the coil can be fastened to the external connection terminals through more various paths, thereby preventing a short circuit caused by contact between the lead wires.

In addition, when the transformer according to the present invention is mounted on a substrate, the coil of the transformer is kept wound in parallel with the substrate. When the coil is wound in parallel with the substrate as described above, leakage magnetic flux generated in the transformer can be minimized from interfering with the outside.

Therefore, even when the transformer is mounted on the thin display device, the occurrence of interference between the leakage flux generated from the transformer and the back cover of the display device can be minimized, thereby preventing noise from being generated by the transformer. Therefore, it can be easily employed in a thin display device.

1 is a perspective view schematically showing a transformer according to an embodiment of the present invention.
FIG. 2 is a perspective view schematically showing the bobbin of the transformer shown in FIG. 1. FIG.
3 is a side view schematically showing the bobbin of FIG. 2 with a coil wound;
4 and 5 are enlarged views of portion A of FIG. 1.
6 is a perspective view showing a transformer according to another embodiment of the present invention.
FIG. 7 is a perspective view illustrating the bottom of the transformer shown in FIG. 6. FIG.
8 is a bottom view of the transformer shown in FIG. 6.
FIG. 9 is a cross-sectional view illustrating a cross section taken along line CC ′ in FIG. 6. FIG.
10 is an exploded perspective view schematically showing a flat panel display device according to an embodiment of the present invention.

Prior to the detailed description of the present invention, the terms or words used in the present specification and claims should not be construed as limited to ordinary or preliminary meaning, and the inventor may designate his own invention in the best way It should be construed in accordance with the technical idea of the present invention based on the principle that it can be appropriately defined as a concept of a term to describe it. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, it should be noted that like elements are denoted by like reference numerals as much as possible. In addition, detailed descriptions of well-known functions and configurations that may blur the gist of the present invention will be omitted. For the same reason, some of the elements in the accompanying drawings are exaggerated, omitted, or schematically shown, and the size of each element does not entirely reflect the actual size.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view schematically showing a transformer according to an embodiment of the present invention, Figure 2 is a perspective view schematically showing a bobbin of the transformer shown in FIG. 3 is a side view schematically illustrating the bobbin of FIG. 2 in which a coil is wound.

1 to 3, a transformer 100 according to an embodiment of the present invention is an insulating switching transformer, and includes a coil 50, a bobbin 10, an external connection terminal 30, and a core 40. It is configured to include.

The coil 50 includes a primary coil 51 and a secondary coil 52.

The primary coil 51 is wound around the primary winding portion 13 formed in the winding portion 12 to be described later. In the case of this embodiment, the winding section 12 has two primary winding sections 13a, 13b. Therefore, the primary coils 51 are respectively wound in shapes corresponding to the two primary windings 13.

In addition, the primary coil 51 according to the present invention may be wound a plurality of coils that are electrically insulated from each other in one primary winding (13). The primary coil 51 according to the present embodiment takes the case where three different coils are respectively wound in one primary winding 13. Therefore, a total of six coils are wound around the two primary winding parts 13a and 13b. Accordingly, a total of 12 strands of lead wires L are drawn and connected to the external connection terminal 30 described later.

Meanwhile, for convenience of description, only a few strands are representatively illustrated in FIG. 1, not all of the 12 lead wires L are illustrated.

As described above, the transformer 100 according to the present exemplary embodiment may apply various voltages as the primary coils 51 are formed of a plurality of coils, and correspondingly, various voltages may be drawn out through the secondary coils 52. Can be.

In addition, when the transformer 100 according to the present embodiment applies a voltage to any one of the plurality of primary coils 51, the other primary coils 51 may be electromagnetically induced. The voltage can be drawn by. Therefore, it is also possible to use this for the display device mentioned later.

Each of the coils constituting the primary coil 51 may be configured to have a different thickness, and may have a different number of windings. In addition, the primary coil 51 is not limited to three independent coils as in the present embodiment, and may be configured in various numbers as necessary. This will be described in more detail in the following description of other embodiments.

The secondary coil 52 is wound around the secondary winding portion 15 formed in the winding portion 12 to be described later.

Like the primary coil 51 described above, the secondary coil 52 may be wound with a plurality of coils that are electrically insulated from each other.

The primary coil 51 and the secondary coil 52 are connected to an external connection terminal 30 to which each lead wire L is described later. This will be described in more detail in the description of the external connection terminal 30 to be described later.

The bobbin 10 includes a winding part 12 to which the coil 50 is wound, and a base 20 formed at a lower end of the winding part 12.

The winding part 12 may include a body part 12a formed in a tubular shape, and a flange part 12b extending in an outer diameter direction at both ends of the body part 12a.

A through hole 11 into which a part of the core 40 is inserted is formed inside the body portion 12a, and at least one of the spaces divided along the length of the body portion 12a on the outer circumferential surface of the body portion 12a. The partition wall 16 may be formed. In this case, the coil 50 may be wound in each space divided by the partition wall 16.

The winding part 12 according to the present embodiment includes two partitions 16a and 16b. More specifically, the partition wall 16 according to the present embodiment is spaced apart from the first partition wall 16a and the first partition wall 16a disposed at a position adjacent to the upper end of the bobbin 10 by a predetermined distance, and the base 20 described later. It may be configured to include a second partition (16b) disposed in a position adjacent to).

For this reason, the winding part 12 according to the present embodiment includes three divided spaces 13a, 13b, and 15. However, the present invention is not limited thereto and may be used by forming various numbers of spaces through various numbers of partitions 16 as necessary.

In addition, the winding part 12 according to the present embodiment is a space formed at both ends of the divided three spaces, that is, the space 13a and the body portion 12a between the upper end of the body portion 12a and the first partition wall 16a. The primary coil 51 is wound around the space 13b between the bottom of the bottom wall and the second partition wall 16b (hereinafter referred to as the primary winding), and between the first partition wall 16a and the second partition wall 16b. In the space 15, the secondary coil 52 is wound (hereinafter referred to as a secondary winding). However, the present invention is not limited thereto, and may be variously configured according to the number or arrangement of spaces formed by dividing the winding part 12.

In addition, the partition wall 16 of the winding part 12 according to the present exemplary embodiment may be formed in various thicknesses to minimize the influence of the voltage generated between the primary coil 51 and the secondary coil 52.

The partition 16 is provided to electrically insulate the primary coil 51 and the secondary coil 52. Thus, a coil wound around a specific winding portion (for example, a primary winding portion) is not wound around another partition portion (for example, a secondary winding portion) by carrying over the partition wall 16, and thus, the partition wall 16 according to the present embodiment is used. ), No groove, gap, slit or the like is formed in the peripheral portion except for the guide groove 18 described later.

In addition, the partition wall 16 of the winding part 12 according to the present exemplary embodiment includes at least one lead wire support part 17 protruding from the side, that is, one end to the outside. When the lead wires L of the coil 50 are connected to the external connection terminal 30, the lead wire supporter 17 is provided to prevent the lead wires L from contacting each other as they cross.

That is, the lead wires L are spaced apart from each other and support the lead wires L so as to be connected to the external connection terminal 30. The lead wire support unit 17 will be described in more detail in the description of the external connection terminal 30 to be described later.

The base 20 is formed to protrude in the outer diameter direction and the lower direction, respectively, at both ends of the flange portion 12b formed at the lower end of the winding part 12. In addition, the external connection terminals 30 are fastened to the bases 20a and 20b formed at both ends to protrude to the outside.

In more detail, the base 20 according to the present embodiment includes a primary side base 20a provided with an input terminal 30a and a secondary side base 20b provided with an output terminal 30b. Referring to the drawings, in this embodiment, the case where the primary side base 20a and the secondary side base 20b are formed independently of each other is taken as an example. However, the present invention is not limited thereto, and may be configured to be integrally formed and fastened to the winding part 12.

In addition, the base 20 according to the present embodiment, in order to secure an insulation distance between the input terminal 30a and the output terminal 30b, the distance between the winding unit 12 and the output terminal 30b and the winding unit 12 and The distance between the input terminal 30a may be formed to be all spaced apart by more than 8mm.

However, this is a case where a coil of about 0.5 mm diameter is wound around a small insulated switching transformer, and may be changed depending on the thickness of the coil, the voltage applied to the coil, or the like.

The base 20 has a guide part 22 for guiding a path through the lead wire L on one surface, that is, the upper surface through which the lead wire L is introduced. The guide part 22 is formed of a plurality of grooves so that the lead wires L of the coil 50 can be easily connected to the external connection terminal 30 without contact with other adjacent lead wires L. To guide.

To this end, the guide part 22 may be formed of a plurality of grooves which are respectively distinguished corresponding to the positions where the respective external connection terminals 30 are disposed. In addition, as illustrated, the guide part 22 may be formed in a funnel shape so as to be guided by a plurality of external connection terminals 30 and one groove disposed adjacent to each other.

In addition, the guide part 22 according to the present embodiment is formed so that the bottom surface of each groove is inclined at a predetermined angle or curved to minimize bending of the lead wire L connected to the external connection terminal 30. Can be formed.

The bobbin 10 according to the present embodiment may be easily manufactured by injection molding, but is not limited thereto and may be manufactured by various methods such as press working. In addition, the bobbin 10 according to the present embodiment is preferably made of an insulating resin, and preferably made of a material having high heat resistance and high voltage resistance. As the material for forming the bobbin 10, polyphenylene sulfide (PPS), liquid crystalline polyester (LCP), polybutylene terephthalate (PBT), polyethylene terephthalate (PET) and phenolic resin may be used. .

The external connection terminal 30 is formed to protrude outward from the base 20, and may be formed in various forms according to the shape or structure of the transformer 100 or the structure of the substrate on which the transformer 100 is mounted.

The external connection terminal 30 according to the present embodiment includes an input terminal 30a and an output terminal 30b.

The input terminal 30a is fastened to the primary side base 20a and connected to the lead wire L of the primary coil 51 to supply power to the primary coil 51. In addition, the output terminal 30b is fastened to the secondary base 20b and is connected to the lead wire L of the secondary coil 52 to be set according to the winding ratio between the secondary coil 52 and the primary coil 51. Supply output power to outside.

The input terminal 30a and the output terminal 30b may be formed in the same shape, and may be formed in other shapes as necessary. In addition, the external connection terminal 30 according to the present exemplary embodiment may be variously modified as long as the lead wire L may be connected more easily.

4 and 5 are enlarged views of portion A of FIG. 1, and illustrate the external connection terminal 30 according to the present embodiment in more detail. 5 illustrates the external connection terminal 30 in which the lead wire L of the coil 50 shown in FIG. 4 is omitted. 4 and 5 together, the external connection terminal 30 according to the present embodiment is the coil connection portion 32 and the coil connection portion 32 protruding horizontally from the base 20 to the base 20 It includes a substrate bonding portion 35 extending vertically downward from the end of.

The coil connection part 32 is a part to which the primary coil 51 or the secondary coil 52 is wound and connected, and a coil guide groove 33 may be formed at a side surface thereof.

The substrate junction part 35 is a part inserted into a hole formed in a substrate (not shown) and electrically connected to the substrate through solder or the like, and is formed to have a thickness (or diameter) that can be easily inserted corresponding to the size of the hole formed in the substrate. .

The external connection terminal 30 according to the present embodiment is characterized by having a rigid reinforcement groove 37 and a coil guide groove 33.

The rigid reinforcement groove 37 is formed along the longitudinal direction of the external connection terminal 30, and is formed on one surface of the external connection terminal 30. The rigid reinforcement groove 37 is a groove formed to reinforce the rigidity of the external connection terminal 30, and an external force applied to the external connection terminal 30 in the process of connecting the coil 50 to the external connection terminal 30. Is formed to prevent the external connection terminal 30 from being deformed or broken.

The rigid reinforcement groove 37 may be formed by pressing only a portion where the rigid reinforcement groove 37 is formed through press working with respect to the external connection terminal formed to have a constant thickness.

As a result, the external connection terminal 30 has a higher density than the other portions where the rigid reinforcement grooves 37 are formed, and thus serves as a skeleton of the external connection terminal 30, and thus the external connection terminal 30 Even if an external force is applied, it is not easily deformed or broken and maintains rigidity.

On the other hand, in this embodiment, the case where the rigid reinforcement groove 37 is formed entirely in the coil connection portion 32 and the substrate bonding portion 35 is taken as an example. However, the present invention is not limited thereto and may be formed in various forms according to the shape and structure of the external connection terminal 30.

In addition, although not shown, the external connection terminal 30 according to the present exemplary embodiment has the other surface on which the rigid reinforcing groove 37 is not formed. This is a shape derived by pressing only the portion where the rigid reinforcement grooves 37 are formed through the press working as described above and increasing the density thereof.

However, the present invention is not limited thereto. That is, it is also possible to configure so that the protrusion part protruding a certain height in the form corresponding to the rigid reinforcement groove 37 is formed in the other surface of the external connection terminal 30. In this case, the rigidity of the external connection terminal 30 can be reinforced by the step (or bending) formed by the rigid reinforcement groove and the protrusion.

At least one coil guide groove 33 may be formed in the form of a groove on the side of the external connection terminal 30. In this embodiment, a case in which a total of two coil guide grooves 33 are formed on each side of the coil connection part 32 is taken as an example.

On the other hand, as the electronic device becomes smaller, the width of the external connection terminals of the transformer is narrower, and when the size of the electronic device is small, such as the transformer 100 according to the present embodiment, it is further deepened.

When the coil guide groove 33 is formed in the external connection terminal 30 having such a narrow width, the portion where the coil guide groove 33 is formed becomes narrower in width, which is the external connection terminal 30. Can weaken the stiffness.

Accordingly, the transformer 100 according to the present exemplary embodiment arranges the two coil guide grooves 33 at different positions in order to minimize the stiffness of the external connection terminal 30 due to the coil guide groove 33. . That is, by forming two coil guide grooves 33 spaced apart from each other along the longitudinal direction of the external connection terminal 30, the two coil guide grooves 33 are adjacent to each other, This prevents the width from becoming narrower. At this time, each of the coil guide groove 33 is preferably spaced apart at least more than the width of the external connection terminal (30).

In addition, the coil guide groove 33 is preferably formed to a depth corresponding to the vertical distance from the side of the external connection terminal 30 to the rigid reinforcement groove 37 in order to maintain the rigidity of the external connection terminal 30. However, the present invention is not limited thereto.

As shown in FIG. 4, a lead wire L connected to an external connection terminal 30 is inserted into the coil guide groove 33. As a result, the lead wire L connected to the external connection terminal 30 is suppressed from flowing on the external connection terminal 30 by the coil guide groove 33, thereby improving the fixing force of the lead wire L. FIG. Therefore, the external connection terminal 30 can be connected more firmly and stably.

In addition, in the transformer 100 according to the present embodiment, since the fixing force of the lead wire L is improved by the coil guide groove 33, it is necessary to connect the lead wire L to the external connection terminal 30 several times as in the prior art. There is no. This can simplify the wiring process of the lead wire (L) and reduce the amount of use of the coil 50 can reduce the manufacturing cost.

In addition, since the coil 50 does not need to be wound several times on the external connection terminal 30, even when the coil 50 connected to the external connection terminal 30 is soldered and joined, the amount of solder used can be reduced. have.

The transformer 100 according to the present embodiment configured as described above includes a plurality of input terminals 30a (for example, six). As described above, the transformer 100 according to the present embodiment is derived to use a plurality of coils wound together in one primary winding unit 13, but the transformer 100 of the present invention has an input terminal. (30a) is not limited to six.

In addition, in the transformer 100 according to the present exemplary embodiment, a plurality of primary coils 51 lead wires L are arranged in the input terminal 30a in a narrow space and connected to each other. Therefore, a short circuit may occur due to contact between the lead wires L. FIG.

To this end, the transformer 100 according to the present exemplary embodiment includes a lead wire support part 17 formed to protrude horizontally outwardly from one side of the partition wall 16. As described above, the lead wire support part 17 is provided to prevent the lead wires L of the coil 50 from contacting each other. At least one guide groove 18 may be formed.

The lead wire support unit 17 may be provided on at least one of the first and second partition walls 16a and 16b, and a plurality of lead wire support units 17 may protrude from one partition wall 16.

In addition, when there are a plurality of lead wire supports 17, each of the lead wire supports 17 may be formed to have different protruding distances or all the same, and may be formed to protrude at various distances as necessary.

In addition, in this embodiment, the case where the lead wire support portion 17 protrudes in parallel with the arrangement direction of the external connection terminal 30 is arranged as an example. In this case, since the mold can be easily separated from the bobbin 10 during injection molding, there is an advantage that the manufacturing of the bobbin 10 is relatively easy. However, the present invention is not limited thereto, and the lead wire support part 17 may be configured to protrude in various directions as necessary.

On the other hand, the transformer 100 according to the present embodiment is the lead wire (L) of the primary coil 51 wound on the primary winding unit 13, and the secondary coil 52 wound on the secondary winding unit 15 ) Are drawn in opposite directions. Therefore, a short circuit does not occur easily between the lead wire L of the primary coil 51 and the lead wire L of the secondary coil 52.

However, 12 strands of lead wires L drawn out from the primary winding part 13a disposed above the secondary winding part 15 and the primary winding part 13b disposed below the secondary winding part 15 are provided. ) Are all connected to the input terminal 30a, so the 12 lead wires L may be in contact with each other.

Accordingly, the transformer 100 according to the present embodiment is drawn out from the primary winding part 13a disposed on the secondary winding part 15 through the lead wire support part 17a formed in the first partition wall 16a. Lead wires L are disposed to be spaced apart from each other, and lead wires L drawn out from the primary winding part 13b disposed under the secondary winding part 15 are formed in the second partition 16b. The lead wire support part 17b and the guide part 22 formed in the base 20 are spaced apart from each other.

Accordingly, the lead wires L drawn out from the primary winding part 13b disposed under the secondary winding part 15 are connected to the input terminal 30a along the guide part 22 of the base 20. Alternatively, the wire may be wound around the lead wire support part 17b formed in the second partition 16b and then connected to the input terminal 30a through two paths connected to the input terminal 30a.

To this end, the lead wire support portions 17 according to the present embodiment may be formed to have different protruding distances. In this embodiment, the protrusion distance between the lead wire support portion 17a formed on the first partition wall 16a and the lead wire support portion 17b formed on the second partition wall 16b are different from each other. In particular, the lead wire support portion 17a of the first partition wall 16a positioned in the upper portion is configured to protrude more than the lead wire support portion 17b of the second partition wall 16b positioned in the lower portion, more specifically, the first partition wall 16a. The lead wire support part 17a of () is protruded 1 mm or more more than the lead wire support part 17b of the 2nd partition 16b located underneath.

Thus, when the lead wire support part 17a of the 1st partition 16a is comprised so that it may protrude more than the lead wire support part 17b of the 2nd partition 16b, the lead wires passing through the lead wire support part 17a of the 1st partition 16a will be. (L, lead wires drawn out from the primary winding part 13a) may be connected to the input terminal 30a without interference with other lead wires L (lead wires drawn out from the primary winding part 13b).

In addition, the lead wire supports 17 according to the present exemplary embodiment may be spaced apart from each other so that the lead wires L may be easily spaced apart from each other. More specifically, the plurality of lead wire supports 17 formed on one partition 16 may be disposed to be spaced apart from the other lead wire supports 17 adjacent to each other by at least 1 mm or more.

On the other hand, the lead wire support 17 according to the present invention is not limited to the above configuration, it may be formed to protrude a variety of lead wire support portions 17 in various forms as necessary.

The guide groove 18 formed in the lead wire support unit 17 may be formed in a size and shape corresponding to the thickness of the coil 50. In the present exemplary embodiment, a case in which one guide groove 18 is formed in one lead wire support unit 17 is illustrated as an example, but the present invention is not limited thereto. That is, a plurality of guide grooves 18 may be formed in one lead wire support unit 17 as necessary.

In addition, in the present exemplary embodiment, the case where one guide groove 18 is formed at the center portion of the end of the lead wire support unit 17 is exemplified, but the present invention is not limited thereto. That is, the direction in which the guide groove 18 is formed is a direction in which the lead wire L connected to the external connection terminal 30 is drawn out from the winding part 12, or the external connection terminal 30 to which the lead wire L is connected. It may be formed to face in various directions corresponding to the position of.

In addition, the guide groove 18 may be formed in a curved portion in contact with the lead wire (L) to minimize the friction with the lead wire (L).

The core 40 is inserted into the through hole 11, a part of which is formed in the bobbin 10, to form a magnetic path that is electromagnetically coupled to the coil 50.

The core 40 according to the present embodiment is composed of a pair, and may be inserted into each other through the bobbin 10 to face each other and be fastened. The core 40 may be an 'EE' core, an 'EI' core, a 'UU' core, a 'UI' core, or the like.

In addition, the core 40 may be formed of Mn-Zn-based ferrite having high permeability, low loss, high saturation magnetic flux density, stability, and low production cost compared to other materials. However, the embodiment of the present invention is not limited to the shape or material of the core 40.

On the other hand, although not shown, an insulating tape may be interposed between the bobbin 10 and the core 40 according to the present embodiment. An insulating tape may be provided to ensure insulation between the coil 50 wound on the bobbin 10 and the core 40.

The insulating tape may be interposed to correspond to all inner surfaces of the core 40 facing the core 40 and the bobbin 10, and partially interposed only at a portion where the coil 50 and the core 40 face each other. Can be.

On the other hand, the transformer according to the present invention is not limited to the above-described embodiment is possible various applications.

6 is a perspective view illustrating a transformer according to another embodiment of the present invention, FIG. 7 is a perspective view illustrating a bottom surface of the transformer shown in FIG. 6, and FIG. 8 is a bottom view of the transformer shown in FIG. 6. 9 is a cross-sectional view illustrating a cross section taken along line CC ′ of FIG. 6.

6 to 9, the transformer 200 according to the present embodiment is configured similarly to the transformer (100 of FIG. 1) of the above-described embodiment, and has a difference only in partial configuration. Therefore, the description of the elements configured in the same manner as in the above-described embodiment will be omitted, and a description will be mainly given of the configuration having a difference.

The bobbin 10 includes a winding part 12 to which the coil 50 is wound, and a base 20 formed at a lower end of the winding part 12, similar to the transformer (100 of FIG. 1) of the above-described embodiment. In addition, the winding part 12 is formed in the body portion 12a formed in a tubular shape, the flange portion 12b extending in the outer diameter direction from both ends of the body portion 12a, and the body portion 12a. Two partitions 16 may be included.

The primary coil 51 is wound around the space 13 formed at both ends of the spaces divided by the partition walls 16 and the flange portion 12b, that is, the primary winding portion 15. That is, the secondary coil 52 is wound around the secondary winding part.

In addition, the partition wall 16 according to the present exemplary embodiment may include at least one lead wire support part 17 protruding from the side, that is, one end to the outside.

Meanwhile, as shown in FIG. 6, the base 20 according to the present exemplary embodiment is formed with an inclined surface S having a chamfered surface from the flange portion 12b to the external connection terminal 30.

As the base 20 is formed in this way, the coil 50 wound on the bobbin 10 may be easily connected to the external connection terminal 30 along the inclined surface S of the base 20. Accordingly, the transformer 200 according to the present exemplary embodiment may minimize physical fatigue applied to the bent portion as the lead wires L are bent at the corners of the base 20.

The base 20 may include a primary side base 20a provided with an input terminal 30a and a secondary side base 20b provided with an output terminal 30b.

The external connection terminal 30 may be fastened to the base 20 so as to protrude outward or downward from the end of the base 20.

In addition, the transformer 200 according to the present embodiment, in order to guide the lead wire L of the coil 50 to the external connection terminal 30, not only the upper surface of the base 20, that is, the inclined surface S, but also a coil to be described later. It is characterized by using a carry over part 70 together.

As shown in FIG. 7 and FIG. 8, the transformer 200 according to the present embodiment includes a coil carry-over part 70 at the primary base 20a side. In the present embodiment, since the primary coil 51 includes a plurality of lead wires L, the coil carry over part 70 is provided corresponding to the primary coil 51. Accordingly, the base 20 described below basically means the primary side base 20a unless otherwise specified. Similarly, coil 50 may be primary coil 51.

However, the coil carry over part 70 according to the present invention is not limited to being configured to correspond to the primary coil 51. That is, when the lead wire of the secondary coil 52 is composed of a plurality, it can be easily applied to the secondary coil 52. However, hereinafter, a case where only the primary coil 51 is applied will be described for convenience of description.

Coil carry-over portion 70 is the lead wire (L) of the coil 50 wound on the bobbin 10 is carried forward to the lower surface of the base 20, not the upper surface of the base 20, the external connection terminal 30 Provides a path to

The coil carry over part 70 according to the present exemplary embodiment is formed by the guide block 78 and the base 20, and includes a carry back groove 72, a cross path 74, and a guide groove 76. do.

The guide block 78 may be formed on the lower surface of the bobbin 10, and more specifically, may be formed on the lower surface of the flange portion 12b. The guide block 78 is provided to fix the movement of the core 40 coupled with the bobbin 10 and to provide a passage through which the lead wire L of the coil 51 is disposed below the bobbin 10. do.

To this end, the guide block 78 according to the present embodiment protrudes in the space between the primary base 20a and the through hole 11, and the flange portion of the bobbin 10 along a direction parallel to the base 20. 12b) is arranged to cross the lower surface.

In addition, the guide block 78 according to the present exemplary embodiment is formed such that at least one end of both ends protrudes outward from the flange portion 12b of the bobbin 10. At this time, the space between one end of the guide block 78 protruding to the outside and one end of the base 20 is used as the carry-back groove 72.

As described above, the carry-over groove 72 has one end of the guide block 78 projecting outwardly perpendicularly from the outer periphery of the flange portion 12b, one end of the base 20, and a flange portion provided therebetween. 12b). The carry-over groove 72 is used as a path through which the lead wire L of the coil 50 wound on the bobbin 10 is carried forward to the lower part of the bobbin 10.

On the other hand, in the present embodiment, as one example of the guide block 78 and the base 20 is projected to the outside of the flange portion 12b is carried out the case where the back groove 72 is formed. However, the present invention is not limited to this and other various configurations are possible. For example, one end of the guide block 78 and the base 20 does not protrude, and a portion of the flange 12b between the guide block 78 and the base 20 is removed to form a groove. If the groove can be formed on the outer periphery of 12b, various types of grooves can be used.

In addition, the transformer 200 according to the present embodiment, in order to prevent the lead wire L from leaving the carry-over groove 72 in the process of carrying the lead wire L to the lower portion of the bobbin 10, the bobbin 10. One end of the guide block 78 protruding from the flange portion 12b of the) may be formed in a ring shape.

The transverse path 74 is a path formed between the guide block 78 and the base 20, and provides a path that traverses one side of the lower surface of the flange part 12b. The transverse path 74 is used as a path in which the lead line L of the coil 50 carried through the back groove 72 is disposed along the longitudinal direction of the base 20.

The guide groove 76 is formed in a groove shape at the lower surface of the base 20, and serves as a path through which the lead wire L of the coil 50 disposed in the transverse path 74 is connected to the external connection terminal 30. do. That is, the arrangement direction of the lead wire L of the coil 50 arranged in the transverse path 74 by the guide groove 76 is switched in the direction in which the external connection terminal 30 is arranged.

To this end, the guide groove 76 is formed to cross the base 20 in the width direction so that one end is in communication with the transverse path 74, the other end is opened to the outside of the base 20.

On the other hand, the lead wire L, the arrangement direction of which is changed by the guide groove 76, comes into contact with the side wall edge portion of the guide groove 76, whereby the lead wire L may be excessively bent or bent at the contact portion. have. Accordingly, in the guide groove 76 according to the present exemplary embodiment, the chamfer 26 may be formed at an edge portion of the sidewall directly contacting the lead wire L. FIG.

In FIG. 7 and FIG. 8, the case where the chamfer 26 is formed in a curved surface is taken as an example. However, the present invention is not limited thereto, and various applications are possible, such as forming the chamfer 26 as an inclined surface.

The guide grooves 76 may be formed in parallel to correspond to the number of lead wires L disposed in the cross path 74 or the number of external connection terminals 30 to which the lead wires L are connected. Can be.

The lead L of the coil 50 is disposed on the coil carry over part 70 according to the present exemplary embodiment, which is configured as described above, and looks at the process of fastening to the external connection terminal 30 as follows.

The coil 50 wound on the bobbin 10 is finally fastened with a lead wire L wound around the external connection terminal 30. At this time, the lead wire L of the coil 50 (for example, the primary coil) is fastened to the external connection terminal 30 along the inclined surface (S in FIG. 6) of the base 20 described above, or the coil carry over part 70 is closed. After moving to the lower surface of the bobbin 10 through, it can be fastened to the external connection terminal 30.

The lead wire L drawn out to the inclined surface S of the base 20 may be directly coupled to the external connection terminal 30.

On the other hand, when the lead wire L is connected to the external connection terminal 30 through the coil carry over part 70, the lead wire L moves to the lower surface of the bobbin 10 through the carry-over groove 72. At this time, since the flow of the lead wire L is suppressed by the annular shape of one end of the guide block 78, the lead wire L is not easily separated from the carryover groove 72.

Subsequently, the lead wire L is disposed in the transverse path 74 formed on the lower surface of the bobbin 10, and then supports the side wall (that is, the chamfer) of the guide groove 76, and the path thereof is changed so that the external connection terminal ( 30).

In the present embodiment, the lead wire L is changed in its path at approximately right angles by the guide groove 76. However, the present invention is not limited thereto. If the lead wire L can be firmly fixed to the external connection terminal 30 without interference with the lead wires L of another coil, the guide groove contacting the lead wire L The path of the lead wire L may be set by forming sidewalls of the 76 at various angles.

In addition, the guide groove 76 according to the present exemplary embodiment is formed such that sidewalls contacting the lead wires L are substantially perpendicular to the bottom surface of the guide groove 76. This is a structure for preventing the lead wire L supported by the side wall from being separated from the guide groove 76.

Accordingly, the guide groove 76 according to the present invention is not limited to the above-described configuration, and may be formed in various shapes as long as the lead wire L supported by the side wall is configured so as not to be separated from the guide groove 76. For example, a sidewall contacting the lead wire L may be formed at an acute angle with respect to the bottom surface. In addition, a variety of applications are possible, such as configured to form a step or groove in the chamfer 26.

The coil carry over part 70 according to the present embodiment described above is derived in consideration of the case where the coil 50 is easily and automatically wound on the bobbin 10.

That is, according to the configuration of the coil carry-over part 70 according to the present embodiment, the process of winding the coil 50 to the bobbin 10 and the lead wire L of the coil 50 through the carry-over groove 72 are performed. The process of disposing to the lower surface of the bobbin 10 and disposed in the transverse path 74, and the path of the lead wire L through the guide groove 76 to switch the lead wire L to form an external connection terminal 30. After drawing in the direction, the process of fastening the lead wire L to the external connection terminal 30 may be automatically performed through a separate automatic winding facility (not shown).

As described above, the transformer 200 according to the present exemplary embodiment provides the coil carry over part 70, which is a path through which the lead wire L of the coil 50 crosses the bobbin 10 on the lower surface of the bobbin 10.

Accordingly, the lead wires L are distributed to one surface (that is, the inclined surface of the base) and the other surface (that is, the coil carry-over portion) of the flange portion 12b and fastened to the external connection terminal 30, thereby making it more versatile than a conventional transformer. Leads L of the coil 50 may be fastened to the external connection terminal 30 through the path.

In the related art, when a plurality of coils are wound around the bobbin, the lead wires of the coils drawn to the external connection terminals are arranged to cross each other, and thus, the lead wires come into contact with each other, causing a short circuit between the coils.

However, since the transformer 200 according to the present exemplary embodiment provides a new path by the coil carry over part 70 as described above, the lead wires L may be connected to the external connection terminal 30 through various paths. . Therefore, it is possible to prevent the lead wires L from crossing or contacting each other.

In addition, as in the above-described embodiment, the coil 50 of the transformer 200 according to the present embodiment may include a primary coil 51 and a secondary coil 52.

As shown in FIG. 9, the primary coil 51 is wound around the primary winding part 13a. In the case of the present embodiment, the winding part 12 has two primary winding parts 13a. Accordingly, the primary coils 51 may be wound in a shape corresponding to each of the two primary winding parts 13a.

In addition, in the primary coil 51 according to the present embodiment, a plurality of coils 51a and 51b that are electrically insulated from each other may be wound in one primary winding unit 13. In this embodiment, the case where two different coils 51a and 51b are used as the primary coil 51 is taken as an example. Accordingly, a total of four individual coils 51a and 51b are wound around the two primary windings 13a and 13b, and thus, a total of eight strands of lead wires L are drawn out to be connected to the external connection terminal 30. Can be.

Meanwhile, in the present embodiment, for convenience of description, a case in which the primary coil 51 includes two individual coils 51a and 51b is taken as an example. However, the present invention is not limited thereto, and the present invention is not limited thereto. The primary coil 51 may be configured to include various numbers of coils as necessary, such as configured to include three individual coils.

In addition, the transformer 200 according to the present embodiment, at least one of the coil 50 wound on the outermost side of the winding part 12 in order to ensure insulation between the coils 50 wound on the winding part 12. The triple insulated coil (TIW) is characterized in that.

Referring to FIG. 9, in the transformer 20 according to the present embodiment, an insulation coil 51a that is generally used is wound around an inner side of the winding part 12, that is, a portion adjacent to the outer circumferential surface of the body part 12a. The triple insulation coil 51b is wound on the outer side of 12, that is, the portion adjacent to the outer circumference of the partition 16.

More specifically, the primary coil 51 according to the present embodiment includes at least one general insulation coil 51a and at least one triple insulation coil 51b. The triple insulation coil 51b is wound to be disposed at the outermost side in the primary winding 13.

Here, the triple insulated coil 51b is a coil in which an insulator is formed in three layers on the outside of the conductor to increase the insulation of the coil. When the triple insulated coil 51b is used, the insulation between the conductor and the outside is easily facilitated. It can be ensured to minimize the insulation distance between the coils. However, there is a disadvantage in that the manufacturing cost is higher than that of the general insulation coil 51a.

Accordingly, the transformer 200 according to the present embodiment basically uses the general insulation coils 51a and 52a as the primary coils 51 and the secondary coils 52, and is located at the outermost side in the winding part 12. The triple insulation coil 51b is used only for the coil arrange | positioned.

As shown in FIG. 9, the case of using the triple insulation coil 51b only in the primary winding 13, that is, the primary coil 51, is illustrated as an example. In this case, the insulation distance and the creepage distance of the general insulation coil 51a of the primary winding part 13 and the general insulation coil 52a of the secondary winding part 15 are sufficiently separated by the partition wall 16. Insulation between each other can be secured.

The distance between the triple insulation coil 51b of the primary winding 13 and the general insulation coil 52a of the secondary winding 15 is very close to each other (particularly creepage distance), but the primary coil Since 51 is the three insulation coil 51b with high insulation, insulation with the secondary coil 52 can be ensured.

Therefore, when winding the coil 50 as shown in Figure 9, it is possible to easily ensure the insulation between the primary coil 51 and the secondary coil 52 while using the triple insulation coil 51b to a minimum. have.

However, the present invention is not limited thereto, and various applications are possible. For example, the primary winding unit 13 may be modified in various ways, such as using only a general insulation coil and using a triple insulation coil for the secondary coil 52 wound on the secondary winding unit 15. have. In addition, in consideration of the number of windings of each coil 50 and the creepage distance between the coils 50, the use position and the amount of use of the triple insulation coil can be appropriately adjusted.

10 is an exploded perspective view schematically illustrating a flat panel display device according to an exemplary embodiment of the present invention.

Referring to FIG. 10, the flat panel display apparatus 1 according to an exemplary embodiment of the present invention may include a display panel 4, a power supply unit 5 on which a transformer 100 is mounted, and covers 2 and 8. have.

The covers 2 and 8 include a front cover 2 and a back cover 8 and may be coupled to each other to form a space therein.

The display panel 4 is disposed in an inner space formed by the covers 2 and 8, and various flat display panels such as a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting diode (OLED), and the like may be used. Can be.

The power supply unit SMPS 5 supplies power to the display panel 4. The power supply unit 5 may be formed by mounting a plurality of electronic components on the printed circuit board 6, and in particular, at least one of the transformers according to the above-described embodiments may be mounted. In the present embodiment, a case in which the transformer 100 of FIG. 1 is used is taken as an example.

The power supply unit 5 may be fixed to the chassis 7, and may be disposed and fixed in an inner space formed by the covers 2 and 8 together with the display panel 4.

At this time, the transformer 100 mounted on the power supply unit 5 is wound in a direction in which a coil (50 in FIG. 1) is parallel to the printed circuit board 6. In addition, when viewed on the plane of the printed circuit board 6 (Z direction), the coil 50 is wound in a clockwise or counterclockwise direction. A portion (ie, upper surface) of the core 40 is parallel to the back cover 8 and forms a gyro.

Accordingly, in the transformer 100 according to the present exemplary embodiment, the magnetic flux generated between the back cover 8 and the transformer 100 among the magnetic fields generated by the coil 50 is mostly in the core 40. Since it is formed, it is possible to minimize the leakage magnetic flux generated between the back cover and the transformer 100.

As described above, the transformer 100 according to the present exemplary embodiment may generate leakage magnetic flux between the transformer 100 and the metal back cover 8 even without a separate shielding device (for example, a shielding shield). It can be minimized. Therefore, the back cover 8 can be prevented from vibrating due to interference between the leakage magnetic flux and the back cover 8 made of metal.

Accordingly, even if the transformer 100 is mounted on a thin electronic device such as the flat panel display apparatus 1 and the gap between the back cover 8 and the transformer 100 is formed to be very narrow, the vibration of the back cover 8 may occur. Noise can be prevented from occurring.

In the transformer according to the present invention configured as described above, the lead wires of the coils are spaced apart by a predetermined interval by a lead wire support part formed to protrude horizontally outward from the partition wall. Therefore, even when a plurality of coil leads are connected to an external connection terminal in a narrow space, interference between the leads may be prevented or a short circuit may occur due to contact.

In addition, since the transformer according to the present invention has a rigid reinforcing groove formed in the external connection terminal, it is possible to prevent bending or breaking even when external force is applied to the external connection terminal in the process of connecting the lead wires of the coil to the external connection terminal.

In addition, the transformer according to the present invention improves the fixing force of the lead wire coupled to the external connection terminal by the coil guide groove formed in the external connection terminal. Accordingly, since the lead wires are not wound around the external connection terminals many times as in the related art, it is possible to simplify the wiring process of the lead wires, and the amount of coils used can be reduced, thereby reducing the manufacturing cost.

In the transformer according to the present invention, the coil wound at the outermost side of the coils wound on at least one winding part uses a triple insulation coil. Accordingly, since insulation between the primary coil wound on the primary winding part and the secondary coil wound on the secondary winding part can be easily secured, the size of the partition wall separating the winding part can be minimized, thereby reducing the size of the bobbin. It can form smaller. This has the advantage that the transformer can be made small.

In addition, the transformer according to the invention is characterized in that it is configured to be suitable for an automated manufacturing method. That is, the transformer according to the present invention is configured to automatically wind the primary coil and the secondary coil to the bobbin, and the winding of the coil may be performed through a separate automatic winding facility. This has the advantage of significantly reducing the cost and time required for manufacturing.

In addition, the transformer according to the present invention includes a coil carryover part, which is a path through which the lead wire of the coil crosses the bobbin at the lower surface of the bobbin. That is, in the transformer according to the present invention, the coil may be connected to the external connection terminal through the lower surface as well as the upper surface of the base.

Therefore, the lead wires of the coil can be fastened to the external connection terminals through more various paths, thereby preventing a short circuit caused by contact between the lead wires.

In addition, when the transformer according to the present invention is mounted on a substrate, the coil of the transformer is kept wound in parallel with the substrate. When the coil is wound in parallel with the substrate as described above, leakage magnetic flux generated in the transformer can be minimized from interfering with the outside.

Therefore, even when the transformer is mounted on the thin display device, the occurrence of interference between the leakage flux generated from the transformer and the back cover of the display device can be minimized, thereby preventing noise from being generated by the transformer. Therefore, it can be easily employed in a thin display device.

On the other hand, the transformer according to the present invention described above is not limited to the above-described embodiments, various applications are possible. For example, in the above embodiment, the case where two coil guide grooves are formed in the external connection terminal has been described as an example. However, the present invention is not limited thereto, and a plurality of grooves may be formed as necessary, and in addition, various applications may be configured such that continuous grooves are formed on both sides of the external connection terminal.

In addition, it is also possible to reinforce the rigidity of the external connection terminal by bending the external connection terminal at an angle with respect to the center line along the longitudinal direction.

In addition, when the rigidity of the external connection terminal is secured, the external connection terminal can be configured to omit the rigid reinforcement groove and to provide only the coil guide groove.

In addition, the present embodiment has been described using an insulating switching transformer as an example. However, the present invention is not limited thereto and may be widely applied to a transformer or an electronic device including a coil and an external connection terminal to which a lead wire of the coil is connected.

100, 200 ... Transformers
10 ..... Bobbin 12 .....
13 ..... Primary winding 15 ..... Secondary winding
16 .... bulkhead
16a ..... the first bulkhead 16b ..... the second bulkhead
17 ..... lead wire support 18 ..... Guide groove
20 ..... Base 22 ..... Guide
30 ..... External connection terminal
30a ..... input terminal 30b ..... input terminal
32 ..... coil connection
33 ..... Coil guide groove 35 .... Board junction
37 ..... rigid reinforcement groove
40 ... core 50 ... coil
51 ..... Primary Coil 52 ..... Secondary Coil
70 ..... coil carry over 72 ..... carry over home
74 ..... crossing path 76 ..... Guide Home
78 ..... Guide Block

Claims (32)

A winding part in which a plurality of partitions are formed on an outer circumferential surface of the tubular body part;
A base provided at one end of the winding part and having at least one external connection terminal protruding outward;
A plurality of coils wound on the winding part and having a lead wire connected to the external connection terminal; And
A core forming a magnetic path for electromagnetic coupling with the coil;
Including;
The winding unit,
A transformer protruding from the partition wall to the outside and having at least one lead wire support part supporting the lead wire through an end thereof and guiding the lead wire to the external connection terminal. The method of claim 1, wherein the partition wall,
A first partition wall disposed at a position adjacent to the other end of the winding part;
A second partition spaced apart from the first partition wall at a predetermined interval and disposed at a position adjacent to the base,
The lead wire support part is provided in at least one of the first and second partition walls. The method of claim 2, wherein the lead wire support portion,
And a lead wire supporting portion provided in the first partition wall so as to protrude more than the lead wire supporting portion provided in the second partition wall. The method of claim 2, wherein the lead wire support portion,
A transformer protruding in parallel with the arrangement direction of the external connection terminal. The method of claim 2, wherein the coil,
A primary coil wound around a space between the other end of the winding part and the first partition wall, and between the one end of the winding part and the second partition wall;
And a secondary coil wound around a space between the first and second partition walls. The method of claim 5, wherein the lead wires of the primary coil wound between the other end of the winding portion and the first partition wall,
A transformer supported by the lead wire support part protruding from the first partition wall and connected to the external connection terminal. The method of claim 5, wherein the base,
And a groove-shaped guide portion configured to guide the lead wires to the external connection terminals. The method of claim 7, wherein the lead wires of the primary coil wound in the space between the one end of the winding portion and the second partition wall,
A transformer supported by at least one of the lead wire support portion protruding from the second partition wall or the guide portion of the base and connected to the external connection terminal. The method of claim 5, wherein the primary coil or the secondary coil,
A transformer comprising a plurality of coils electrically isolated from each other. The method of claim 9, wherein the primary coil or the secondary coil,
At least one general insulated coil and at least one triple insulated coil,
The triple insulated coil is wound around the outermost portion of the winding transformer. The method of claim 1, wherein the lead wire support portion,
A transformer having a different protruding distance from each of the partition walls. The method of claim 1, wherein the lead wire support portion,
A transformer having at least one guide groove into which the lead wire is inserted. The method of claim 12, wherein the lead wire support portion,
A transformer in contact with the lead wire portion is formed in a curved surface. The method of claim 1, wherein the external connection terminal,
A transformer having a rigid reinforcement groove formed inside the groove in the longitudinal direction in the longitudinal direction to reinforce the rigidity of the external connection terminal. The method of claim 14, wherein the rigid reinforcement groove,
Transformer which is a groove formed by press working. The method of claim 14, wherein the external connection terminal,
The portion of the rigid reinforcement groove is formed with a higher density than the other portion. The method of claim 1, wherein the external connection terminal,
When the lead wire of the coil is connected, the lead wire is inserted and at least one coil guide groove to be connected to the transformer is formed on the side. The method of claim 17, wherein the coil guide groove,
Transformers respectively formed on both sides of the external connection terminal. delete delete delete A winding portion having a plurality of partition walls formed on an outer circumferential surface of the tubular body portion and having a flange portion protruding outward from both ends of the body portion;
A base having at least one external connection terminal projecting outward from a flange portion formed at one end of the winding portion;
A plurality of coils wound on the winding part and having a lead wire connected to the external connection terminal;
A core forming a magnetic path for electromagnetic coupling with the coil; And
A coil carry-over part including a carry-back groove which is a path through which the lead wires of the coil move to the lower surface of the flange part and a cross-path which is a path arranged so that the lead wire carried through the carry-in groove traverses the outer surface of the flange part; ;
Including;
The winding part is formed to protrude outward from the partition wall, and includes at least one lead wire support part for supporting the lead wire through an end and guiding the lead wire to the external connection terminal.
The coil carry over part is a path formed between the base and a guide block formed to protrude parallel to the base on an outer surface of the flange part. The method of claim 22, wherein the guide block,
One end is formed to protrude outward from the outer periphery of the flange portion,
The carry-over groove is a transformer formed by the protruding end of the guide block and the base and the flange portion. The method of claim 23, wherein the base,
A guide part having a groove shape for guiding the lead wire to the external connection terminal;
And the lead wire is connected to the external connection terminal via the guide part or the coil carry over part. The method of claim 22, wherein the coil carry over portion,
And at least one guide groove which is formed in a groove shape on the lower surface of the base and converts the lead wire disposed in the transverse path in a direction in which the external connection terminal is arranged. The method of claim 25, wherein the guide groove,
A transformer is formed in the chamfered portion of the side wall in contact with the lead wire. A winding portion having a tubular body portion having a through hole therein and a flange portion protruding outward from both ends of the body portion;
A base formed at one end of at least one flange part and having a plurality of external connection terminals;
At least one coil wound around a space formed by an outer circumferential surface of the body portion and one surface of the flange portion; And
A coil carry-over part including a carry-back groove which is a path through which the lead wires of the coil move to the lower surface of the flange part and a cross-path which is a path arranged so that the lead wire carried through the carry-in groove traverses the outer surface of the flange part; ;
Including;
Transformers of the coils are distributed to one surface of the flange portion and the coil carry-over portion in order to prevent them from crossing each other and are coupled to the external connection terminal. A winding portion having a tubular body portion having a through hole therein and a flange portion protruding outward from both ends of the body portion, the coil being wound;
At least one external connection terminal projecting outward from a flange portion formed at one end of the winding portion; And
A coil carry-over part including a carry-back groove which is a path through which the lead wires of the coil move to the lower surface of the flange part and a cross-path which is a path arranged so that the lead wire carried through the carry-in groove traverses the outer surface of the flange part; ;
Including;
The external connection terminal is a transformer having a rigid reinforcement groove formed in the groove shape along the longitudinal direction therein to reinforce the rigidity of the external connection terminal. A winding portion having a tubular body portion having a through hole therein and a flange portion protruding outward from both ends of the body portion, the coil being wound;
At least one external connection terminal projecting outward from a flange portion formed at one end of the winding portion; And
A coil carry-over part including a carry-back groove which is a path through which the lead wires of the coil move to the lower surface of the flange part and a cross-path which is a path arranged so that the lead wire carried through the carry-in groove traverses the outer surface of the flange part; ;
Including;
The external connection terminal has a transformer having at least one coil guide groove formed at a side thereof when the lead wire is inserted and connected when the lead wire of the coil is connected. A winding portion having a plurality of partition walls formed on an outer circumferential surface of the tubular body portion and having a flange portion protruding outward from both ends of the body portion;
A base provided at one end of the winding part and having at least one external connection terminal protruding outward;
A plurality of coils wound on the winding part and having a lead wire connected to the external connection terminal;
A core forming a magnetic path for electromagnetic coupling with the coil; And
A coil carry-over part including a carry-back groove which is a path through which the lead wires of the coil move to the lower surface of the flange part and a cross-path which is a path arranged so that the lead wire carried through the carry-in groove traverses the outer surface of the flange part; ;
Including;
The coil comprises at least one general insulated coil and at least one triple insulated coil, the triple insulated coil wound around the outermost portion of the winding. A power supply unit formed by mounting at least one transformer according to any one of claims 1 and 27 to 30 on a substrate;
A display panel supplied with power from the power supply unit; And
A cover protecting the display panel and the power supply;
Flat display device configured to include. The method of claim 31, wherein the coil of the transformer,
And a flat panel winding wound parallel to the substrate of the power supply unit.

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