KR101781981B1 - Hybrid transformer - Google Patents

Abstract

A bobbin includes a body including a coil and a pattern coil, a bobbin coupled with the pattern coil, and a core coupled with the bobbin, wherein the bobbin includes a coil and a patterned coil, and a body integrally formed with the body And a support portion including a plurality of supports supporting the main body, wherein the main body has the pattern coil mounted on at least one of the winding portions. Therefore, the present invention has the effect of contributing to miniaturization by partially using a thin-film type coil while reducing the total cost of manufacturing a transformer by using a conventional copper wire coil instead of using only a thin film type coil having a high manufacturing cost.

Description

Hybrid transformer {HYBRID TRANSFORMER}

Field of the Invention [0002] The present invention relates to a hybrid transformer, and more particularly, to a hybrid transformer including a plurality of coiled coil coils and pattern coils combined to form winding portions of various laminated structures.

Transformers (Transformers) are widely used in electronic devices such as displays and consumer electronics such as televisions. Electronic devices and home appliances are equipped with predetermined electronic circuits that perform specific functions when power is supplied thereto. The electronic circuit may employ a power supply for supplying operating power, and the power supply includes a transformer for converting a commercial power or other input power into a desired power.

The basic operation of the transformer is as follows. A magnetic field is formed in an iron core (core) when a current is applied to one side of a coil wound on both sides of an iron core (core). The current changed with time changes the magnitude of the magnetic field. The changed magnetic field causes a magnetic field and a corresponding current It causes.

There are various types of transformers, but there are typically flyback transformers and resonant transformers based on circuit implementation methods. Flyback transformers are used primarily in auxiliary power sources for DVD players, set-top boxes, game consoles, chargers and high-power systems. The flyback transformer includes a switch on the primary side and a diode on the secondary side, and controls the current and voltage of the output diode by adjusting the switch. The operation of the flyback transformer is classified into a pulling mode in which a switch is controlled by a PWM (Pulse Duration Modulation) integrated circuit (IC) according to a switch control method and a pulling mode in which only a normal transistor is used. When the switch connected to the primary is closed, current flows to the primary inductor and no current flows through the secondary output diode. The current flowing in the primary side until the switch is opened accumulates energy in the inductor. When the switch is opened, the energy stored in the inductor is transferred to the secondary side output terminal, and the output side current and voltage are generated. That is, the current and voltage of the output stage are controlled according to the operating state time of the switch. The resonant transformer includes an inductor, a capacitor and a switch on the primary side, a diode on the secondary side, and controls the resonance of the switch, the inductor, and the capacitor to control the current and voltage of the output diode. When the switch connected to the power supply is closed and the inductor and the capacitor connected to the primary side resonate, a voltage is applied to the primary capacitor to charge the energy and no current flows through the secondary output diode. When the switch connected to the power source is opened, the energy charged in the primary side capacitor is transferred to the secondary side output terminal and the output side current and voltage are generated. The output terminal voltage of the resonant transformer is proportional to the load resistance and the output terminal voltage at a certain frequency, and the proportional relation to the frequency is different based on the resonant frequency.

Primarily, the transformer is mounted on a printed circuit board. The primary coil is connected to the primary circuit of the printed circuit board, and the secondary coil is connected to the secondary circuit. Normally, the electronic parts of the primary circuit of the printed circuit board and the secondary parts of the secondary circuit must satisfy a safety standard that must be separated by a certain distance or more. Japanese Patent Laid-Open Publication No. 06-132146 discloses a transformer in which a separator is disposed on the contact surface of one core and the other core to separate the primary coil and the secondary coil. To meet the safety standard for the insulation distance between the printed circuit board and the printed circuit board.

However, the size of the transformer needs to be reduced in accordance with recent trend toward downsizing and integration. In order to miniaturize and integrate the transformer, the transformer needs to have a structure in the form of a thin film. In accordance with this trend, a patterned coil which is a thin film coil formed in a pattern on a printed circuit board has been developed. The transformer using the patterned coil is a planar transformer. Korean Patent Registration No. 10-0285105 discloses a thin film pattern coil for use in a flyback transformer. The above-mentioned planar transformer must satisfy not only the predetermined safety standards but also economical efficiency in accordance with the mass production of electronic devices. Therefore, manufacturing a transformer using only a patterned coil having a high manufacturing cost does not satisfy price rationality, and therefore, it is required to use a coil made of a conventional copper wire. Also, in order to satisfy various specifications of the users of the transformer, it is required to use a coil made of a conventional copper wire and a patterned coil in parallel.

Accordingly, the present invention provides a hybrid type transformer in which a patterned coil and a coil made of a conventional copper wire can be used together.

Japanese Patent Application Laid-Open No. 06-132146 (May 13, 1994) Korean Patent Registration No. 10-0285105 (Mar. 15, 2001)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hybrid transformer including a winding portion of a laminated structure in which a general coil and a pattern coil can be used in parallel.

Another problem to be solved by the present invention is to provide a method of combining a hybrid transformer in which a general coil and a pattern coil can be used in parallel.

SUMMARY OF THE INVENTION In one aspect of the present invention, the present invention provides a method of manufacturing a semiconductor device, comprising: a coil and a pattern coil; a bobbin coupled with the pattern coil; and a core coupled with the bobbin, And a support portion including a main body and a plurality of supports formed integrally with the main body and supporting the main body, wherein the main body has the pattern coil mounted on at least one of the winding portions.

The bobbin includes a through hole penetrating the main body and the support portion, and the pattern coil includes a coil pattern having a shape corresponding to the through hole.

Also, the core penetrates the through-hole and the coil pattern and is coupled with the bobbin.

The bobbin includes a through hole penetrating through the body and the support portion, and the body includes an inner circumferential groove formed in an inner circumferential surface corresponding to the winding portion on which the pattern coil is mounted.

In addition, the at least one winding portion on which the pattern coil is mounted may have a structure in which one end is opened and the other end is cut off, and the pattern coil is inserted into the opened end and mounted on the winding portion. do.

According to another aspect of the present invention, there is provided a bobbin for coupling with a pattern coil, comprising: a main body including a coil and a winding portion to which the pattern coil is mounted; and a plurality of supports formed integrally with the main body, Wherein the pattern coil is mounted on at least one or more winding portions of the main body.

Also, at least one or more winding portions to which the pattern coils are mounted may have a structure in which one end is opened and the other end is cut off.

Also, the present invention provides a hybrid bobbin having a laminated structure.

In addition, the present invention provides a hybrid bobbin, wherein the winding portion is a laminated structure divided into insulating walls of insulating material.

In another aspect of the present invention, there is provided a method of bonding a transformer, comprising the steps of mounting a pattern coil on a bobbin and bonding the core to the bobbin, And a support portion including a plurality of support rods integrally formed with the main body to support the main body, wherein the main body includes at least one winding portion in which the pattern coil is mounted, Wherein the pattern coil includes a coil pattern having a shape corresponding to the through hole, and the core is vertically coupled with the bobbin through the through hole and the coil pattern. ≪ / RTI >

The present invention has the effect of contributing to the miniaturization by using the conventional copper wire coil instead of using only the thin film type coil having a high manufacturing cost, lowering the total cost of manufacturing the transformer and partially using the thin film type coil.

In addition, the present invention has the effect of meeting the design specifications of a transformer consumer because a plurality of winding portions in which a copper wire coil is wound and a thin film type coil is inserted are stacked and various kinds of coils are combined.

1 is a perspective view of a hybrid bobbin according to a preferred embodiment of the present invention.
2 is an exploded perspective view of a hybrid transformer according to one preferred embodiment of the present invention.
3 is a perspective view and a side view of a hybrid transformer according to a preferred embodiment of the present invention.
4 is a plan view and a bottom view of a hybrid transformer according to an embodiment of the present invention.
5 is a perspective view of a hybrid transformer viewed from various angles according to another preferred embodiment of the present invention.
6 is an exploded perspective view of a hybrid transformer according to another preferred embodiment of the present invention.
FIG. 7 is a flowchart illustrating a hybrid transformer according to a preferred embodiment of the present invention. Referring to FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. In order to facilitate a thorough understanding of the present invention, the same reference numerals are used for the same means regardless of the number of the drawings.

1 is a perspective view of a hybrid bobbin according to a preferred embodiment of the present invention.

Referring to FIG. 1, the bobbin 100 of the present invention includes a body 110 and a support 120. The body 110 and the support 120 are integrally formed with each other. The support 120 is formed from the main body 110 and extends to the lower end of the main body 110. The support 120 supports the main body 110 at the lower end of the main body 110. [ The support portion 120 also includes a terminal 123 connected to the coil on either side.

The outer shape of the main body 110 is a shape of a column having a circular or square cross section. The cross section of the main body 110 may have the same shape as the cross section of the through hole 113, but it does not necessarily have to be the same. For example, the outer shape of the main body 110 may be a cylinder, or the through hole 113 may be an elliptical column or a square column. The shape of the main body 110 is determined by the insulating isolation wall 112 that separates the winding portions 111 from the shape of the through hole 113. [ In Fig. 1, a circular insulating isolation wall 112 and a cylindrical main body 110 are shown.

The body 110 includes through holes 113 through which the cores 210, 220 are coupled, either centrally or internally. The through hole 113 is formed in the body 110 in a shape corresponding to the shape of the first joint 211 of the cores 210 and 220 to which the body 110 is coupled, And is formed inside the main body 110. 1, a main body 110 having a cylindrical through-hole 113 is shown when the first joint 211 of the coupled core 210, 220 is a cylinder. If the shape of the coupled cores 210 and 220 is a quadrangular prism, the through-hole 113 may have a corresponding quadrangular prism shape. The through hole 113 may be the same as the outer shape of the main body 110, but it is not necessarily coincident. The depth of the through hole 113 is preferably formed by the length of the two first joints 211 so that the cores 210 and 220 can be engaged with each other at the top and bottom. If the depth of the through hole 113 is longer than the length of the two first joints 211, the first joints 211 of the cores 210 and 220 can not contact each other, . If the depth of the through hole 113 is shorter than the length of the two first joints 211, the core 210 and 220 are not integrated with the bobbin 100 and the first joint 211 is exposed to the outside, .

The bobbin 100 on which the through hole 113 is formed includes an inner peripheral groove 114 on the inner peripheral surface. The inner circumferential groove 114 is formed along the circumference of the inner circumferential surface at a specific position, and the forming position corresponds to a place where the pattern coil is wound in the coil to be coiled. Therefore, when a plurality of pattern coils are wound on the winding portion 111, the inner circumferential groove 114 is also formed at the same position as the position where the pattern coils are wound by the number of times the pattern coils are wound. Although the conventional copper wire coil is wound around the winding part 111 several times and is wound by the structure of the bobbin 100 of the present invention, the pattern coil is formed by inserting the printed circuit board (PCB) including the patterned thin film coil into the slit of the winding part 111 . Therefore, it is preferable that the winding part 111 where the pattern coil is wound includes a slit so that one end where the pattern coil is inserted is opened, the other end is cut off, and the inside has a structure that passes through in the direction in which the pattern coil is inserted . The pattern coil inserted in the winding portion 111 is pushed to the opposite end of the pattern coil via the inner circumferential groove 114. The pattern coil is required to form the inner circumferential groove 114 in the process of inserting the pattern coil through the inside of the bobbin 100 and winding the pattern coil. The inner circumferential groove 114 formed in the inner peripheral surface of the bobbin 100 is a characteristic structure according to the winding method of the pattern coil insertion of the present invention.

The main body 110 of the bobbin 100 includes a winding portion 111. The winding part 111 may be composed of a plurality of coil parts according to the number of coils to be wound. In Fig. 1, three winding portions 111-1, 111-2 and 111-3 in which three coils are wound are shown. The winding portions 111-1, 111-2, and 111-3 have different shapes depending on the types of coils to be wound. The first winding portion 111-1 and the third winding portion 111-3, in which a common copper wire coil is wound, include openings formed along the circumference of the main body 110 and are all opened. The second coil portion 111-2 in which the pattern coil is wound has a structure in which one end of the second coil portion 111-2 is opened in the form of a slit and the other end of the second coil portion 111-2 is cut off .

The winding portion 111 may be formed in a laminated structure. The coil of the required type can be wound for each layer, the winding portion of the general coil is entirely opened, and the winding portion of the pattern coil has a structure in which one end is cut off. It is preferable that a copper wire coil is used as the winding part of the lowest layer. The lowest winding portion is integrally formed with the supporting portion 120 and the terminal 123 is formed on the supporting portion 120. When the coil of the winding part 111 is connected to the terminal 123, it is necessary to reduce the distance between the winding part 111 and the terminal 123 to reduce the length of the wiring. If the coil of the lowermost winding section is a copper wire coil, the wiring length can be reduced, and the wiring structure can be simplified, as compared with the case where the copper wire coil of the uppermost winding section is connected to the terminal 123. [

The winding portion 111 has a laminated structure divided into an insulating isolation wall 112. The insulating partition walls 112 are formed of a plurality of coil sections 111, and each of the insulating partition walls 112 prevents the coils from contacting each coil section. The thickness of the insulating isolation wall 112 can be adjusted so that the transformer satisfies the safety standard that specifies the space distance and the creepage distance between the coils.

The insulating isolation wall 112 is formed integrally with the main body 110 and integrally formed with the support 120 formed integrally with the main body 110. Therefore, the same material having insulating properties as the material of the body 110 and the supporting portion 120 including the insulating partition wall 112 is used. In order to integrally extend the main body 110 and the support 120, a mold-type manufacturing method may be used, and preferably injection molding using a plastic material may be used. In Fig. 1, the first winding part 111-1 is connected to the first insulating partition wall 112-1 and the second insulation partition wall 112-2, the second winding part 111-2 is connected to the second The third winding part 111-3 is connected to the third insulating isolation wall 112-3 and the support part 120 along the boundary between the insulation isolation wall 112-2 and the third insulation isolation wall 112-3 Respectively.

The supporting portion 120 is integrally formed with the main body 110 and extends from the main body 110 to be positioned at a lower portion thereof to support the main body 110 and to vertically engage with the cores 210 and 220. In detail, the support 120 includes a first support 121 and a second support 122. The first support 121 and the second support 122 may be formed at both ends of the support 120 to support the main body 110. The cores 210 and 220 may contact each other through a space between the first support 121 and the second support 122.

The support 120 includes a terminal 123. The terminal 123 may be formed on either the first support 121 or the second support 122 and is connected to a pattern coil or a coil to transfer current to the outside.

FIG. 2 is an exploded perspective view of a hybrid transformer according to a preferred embodiment of the present invention, and FIG. 7 is a flowchart illustrating a hybrid transformer combining method according to an exemplary embodiment of the present invention.

Referring to FIGS. 2 and 7, the hybrid transformer of the present invention is coupled in a certain order due to the structural characteristics of the bobbin 100. In the present embodiment, three coils are used, which are referred to as a first coil 311, a second coil 312 and a third coil 313, respectively. The second coil 312 is a pattern coil, and the first coil 311 and the third coil 313 are general copper wire coils. The bobbin 100 including winding portions having different lamination structures according to the number, shape, and position of the coils to be used must be manufactured by the injection molding method. That is, the bobbin shape is determined in advance according to the type of coil used.

The second coil 312 includes a substrate 312-1, a coil pattern 312-2, and a substrate terminal 312-3. The coil pattern 312-2 is formed by stacking a plurality of thin films formed with a coil-shaped metal pattern through a through-hole and stacking the substrate 312-1. The coil pattern 312-2 is mainly used for planar transformers for miniaturization and integration. Since the coil pattern 312-2 must be electromagnetically coupled with the coil wound around, parameters such as shape, thickness, and width of the pattern are electromagnetically coupled with the first coil 311 and the third coil 313 It needs to be adjusted as much as possible. Since the cores 210 and 220 are coupled with the bobbin 100 on which the second coil 312 is mounted, the pattern shape of the second coil 312 can be changed according to the shape of the through hole 113 or the shape of the cores 210 and 220 It is necessary to correspond to the shape of the first joint 211. 2, the second coil 312 having a circular coil pattern is shown because the cross-sectional shape of the through hole 113 and the first joint portion 211 is circular. The substrate 312-1 includes a coil pattern 312-2 and an ancillary circuit. The substrate terminal 312-3 is connected to the circuit of the coil pattern 312-2 or the substrate 312-1 to exchange signals with the outside.

In step S701, the bobbin 100 and the first coil 311 and the third coil 313 are coupled. The first coil 311 and the third coil 313 made of copper wire are wound around the first winding portion 111-1 of the uppermost layer and the third winding portion 111-3 of the lowermost layer, respectively.

The first coil 311 and the third coil 313 coupled to the bobbin 100 are connected to the terminal 123 in step S703. As described above, in order to make the connection with the terminal as close as possible, disposing the copper wire coil in the winding part 111 closest to the terminal 123 contributes to reducing the complexity of the wiring.

In step S705, the second coil 312, which is a pattern coil, is mounted on the bobbin 100 and coupled thereto. The first coil 311 and the third coil 313 made of copper wire are wound around the first winding portion 111-1 of the uppermost layer and the third winding portion 111-3 of the lowermost layer, respectively. The second coil 312 is inserted into the open end of the slit and inserted into the inner circumferential groove 114 until it comes into contact with the opposite side end. Step S705 in which the pattern coil is mounted may be performed before step S701 and step S703 in which the copper wire coil is wound and connected to the terminal. It is important that the cores 210 and 220 are combined with the bobbin 100 after all of the coils are all coupled to the bobbin 100.

In step S707, the cores 210 and 220 are vertically coupled to the bobbin 100 by penetrating the through-hole 113 of the bobbin 100 and the second coil 312 inserted in the bobbin 100 together . The cores 210 and 220 include a plurality of cores made of a magnetic material. Each of which is referred to as a first core 210 and a second core 220. The first core 210 and the second core 220 include the first and second joints 211 and 221, the second joints 212 and 222 and the third joints 213 and 223. The first bonding portion 211 of the first core 210 is bonded to the first bonding portion 221 of the second core 220 and the second bonding portion 212 of the first core 210 is bonded to the first bonding portion 221 of the second core 220 The second bonding portion 222 and the third bonding portion 213 of the first core 210 are respectively engaged with the third bonding portion 223 of the second core 220 up and down. The first bonding portions 211 and 221 are bonded to each other at the through hole 113 and the second bonding portions 212 and 222 and the third bonding portions 213 and 223 are bonded to each other outside the bobbin 100, All. Preferably, the cores 210 and 220 are spaces between the first support 121 and the second support 122 so that the cores 210 and 220 are vertically spaced apart from each other at positions where the terminals 123 or the substrate terminals 312-3 are not formed .

The coupling of the hybrid transformer requires coupling of the cores 210 and 220 after the second coil 312, which is a pattern coil, is coupled first. Due to the structure of the bobbin 100 including the through hole 113 and the main body 110 and the supporting part 120 formed integrally and the structure of the second coil 312 which is easily detachable and attachable, And pattern coils need to be joined first. When a plurality of pattern coils are used, the pattern coils must be attached before the cores 210 and 220 are coupled.

The structure of the bobbin, the attachment and detachment of the pattern coil, and the coupling of the pattern coil can be achieved by adding or subtracting a copper coil having a low manufacturing cost and a pattern coil having a high manufacturing cost according to a demand or situation of a customer, It offers the advantage of being able to change.

FIG. 3 is a perspective view (FIG. 3a) and a side view (FIG. 3b) of a fully coupled hybrid transformer in accordance with a preferred embodiment of the present invention, and FIG. 4 is a perspective view of a fully coupled hybrid according to a preferred embodiment of the present invention (Fig. 4A) and a bottom view (Fig. 4B) of a transformer.

Referring to FIGS. 3 and 4, a fully assembled hybrid transformer of the present invention is shown. The substrate 312-1 includes a peripheral circuit 312-4 around the coil pattern 312-2. The peripheral circuit 312-4 is electrically connected to the coil pattern 312-2 and the substrate terminal 312-3 to exchange signals with the outside of the hybrid transformer. The cores 210 and 220 of the present invention include a plurality of segmented configurations to facilitate removal and attachment of the bobbin 100 and the coil. Since a general core is formed in a single shape as a whole, once it is combined with the bobbin 100 and the coil, the separation becomes difficult. The cores 210 and 220 of this figure may include a first core 210 and a second core 220, which are two-part configurations. The first core 210 is inserted into the through hole 113 of the bobbin 100 from below and the second core 220 is inserted into the through hole 113 of the bobbin 100 from the top. 222 and 223 of the corresponding second core 220 are joined to each other. The cores 210 and 220 surround the coil and the bobbin 100.

5 is a perspective view of a hybrid transformer viewed from various angles according to another preferred embodiment of the present invention. FIG. 3A is a perspective view from above, and FIG. 3B is a perspective view from below.

Referring to FIG. 5, a hybrid transformer according to another embodiment of the present invention is shown. The hybrid transformer of FIG. 5 differs from the hybrid transformer of FIG. 2 in the shape of the bobbin 100 and the type of coil to be wound, but the remaining components are the same. The shape of the bobbin 100 is a quadrangular pole and the end faces of the through holes 113 and the first bonding portions 211 and 221 of the cores 210 and 220 are rectangular. The first coil 311 is a copper wire coil, and the second coil 312 and the third coil 313 are pattern coils. Since two pattern coils are used, two inner circumferential grooves 114 are formed on the inner circumferential surface of the main body 110. The second coil 312 and the third coil 313 include substrate terminals 312-3 and 313-3 connected to a corresponding coil pattern or circuit of the substrate to exchange signals with the outside.

Another feature of this embodiment is that the first support 121 and the second support 122 of the support 120 are formed in a structure having a heat radiation function. The heat dissipating unit 122-1 conducts the heat radiated by the bobbin 100 and surrounding elements and discharges the heat to the outside. The heat dissipating unit 122-1 may be formed on the first support 121 or the second support 122, and the structure preferably has a maximum cross-sectional area. For example, the heat dissipating part 122 may have a fine irregularity in an embossed form. The specific shape in which the heat dissipating portion 122 is formed on the second support 122 is shown enlarged in Fig. The heat dissipating unit 122 may be integrally formed with the bobbin 100 or may be formed separately. The material of the heat dissipating unit 122 may include metal or silicon.

6 is an exploded perspective view of a hybrid transformer according to another preferred embodiment of the present invention.

Referring to FIG. 6, the hybrid transformer according to another embodiment of the present invention is sequentially combined according to the combining order of FIG. In step S701, the first coil 311 made of a copper wire is wound on the uppermost layer of the winding part 111 and wound. In step S 703, the first coil 311 coupled to the bobbin 100 is connected to the terminal 123. In step S705, the second coil 312 and the third coil 313, which are pattern coils, are mounted on the bobbin 100. Step S705 in which the pattern coil is mounted may be performed before step S701 and step S703 in which the copper wire coil is wound and connected to the terminal. It is important that the cores 210 and 220 are combined with the bobbin 100 after all of the coils are all coupled to the bobbin 100. The cores 210 and 220 penetrate the through holes 113 of the bobbin 100 and the second and third coils 312 and 313 inserted into the bobbin 100 together at step S707, 100).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the present invention can be changed.

100: Bobbin
110:
111:
112: insulated separating wall
113: Through hole
114: Inner Home
120: Support
210: first core
220: second core
311: first coil
312: second coil
313: third coil

Claims (12)

Coils and pattern coils,
A bobbin coupled to the pattern coil;
And a core coupled with the bobbin,
Wherein the bobbin includes a main body including a winding portion to which the coil and the pattern coil are mounted, and a support portion including a plurality of supports formed integrally with the main body to support the main body,
Wherein the main body has the pattern coil mounted on at least one of the winding portions,
Wherein the plurality of supports has a heat dissipation portion. The method according to claim 1,
Wherein the bobbin includes a through hole penetrating the main body and the support portion,
Wherein the pattern coil includes a coil pattern having a shape corresponding to the through hole. 3. The method of claim 2,
And the core penetrates through the through-hole and the coil pattern to be coupled with the bobbin. The method according to claim 1,
Wherein the bobbin includes a through hole penetrating the main body and the support portion,
Wherein the main body includes an inner circumferential groove formed in an inner circumferential surface corresponding to a winding portion on which the pattern coil is mounted. The method according to claim 1,
Wherein at least one or more winding portions to which the pattern coils are mounted has a structure in which one end is opened and the other end is cut off,
And the pattern coil is inserted into the open end and mounted on the winding part. In a bobbin for coupling with a pattern coil,
A main body including a coil and a winding portion on which the pattern coil is mounted;
And a support portion including a plurality of supports formed integrally with the main body and supporting the main body,
Wherein the main body has the pattern coil mounted on at least one of the winding portions,
Wherein the plurality of supports has a heat dissipation portion. The method according to claim 6,
And a through hole penetrating the main body and the support portion,
Wherein the pattern coil includes a coil pattern having a shape corresponding to the through hole. The method according to claim 6,
And a through hole penetrating the main body and the support portion,
Wherein the main body includes an inner circumferential groove formed in an inner circumferential surface corresponding to a winding portion on which the pattern coil is mounted. The method according to claim 6,
Wherein the at least one winding portion on which the pattern coil is mounted is one in which the one end is opened and the other end is cut off. The method according to claim 6,
And the winding portion is formed in a laminated structure. 11. The method of claim 10,
Wherein the winding portion is a laminated structure divided into insulating isolation walls of an insulating material. In a transformer bonding method,
A step in which the pattern coil is mounted on the bobbin and
And joining the core to the bobbin,
Wherein the bobbin includes a main body including a winding portion on which the pattern coil is mounted, and a support portion including a plurality of supports formed integrally with the main body to support the main body,
Wherein the main body includes at least one through-hole through which the pattern coil is mounted and which passes through the main body and the support portion,
Wherein the pattern coil includes a coil pattern having a shape corresponding to the through hole,
Wherein the core penetrates through the through-hole and the coil pattern and is vertically coupled with the bobbin,
Wherein the plurality of supports comprises a heat dissipation portion.

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