CN216871738U - Bobbin and transformer device comprising same - Google Patents

Abstract

A bobbin and a transformer device including the bobbin are provided. A transformation device according to one disclosed embodiment includes a spool, a first core piece, and a second core piece. The bobbin includes a first body part on which a first coil is wound and which includes a coil winding part having an inside provided with a core insertion hole, and a second body part on which a second coil is wound and which is provided with a receiving hole into which the coil winding part is inserted to be received, and is combined with the first body part at an outside of the first body part. The first core member is attached to the upper sides of the first and second body portions, and the second core member is attached to the lower sides of the first and second body portions. Wherein at least one of the first core member and the second core member includes a core member partially inserted into the core insertion hole, and the first body portion and the second body portion are joined in a perpendicular direction. When the coil wound part is inserted into the receiving hole, the top and bottom surfaces of the coil wound part and the top and bottom surfaces of the second body part are provided at the same height, respectively.

Description

Bobbin and transformer device comprising same

Technical Field

Embodiments of the present invention relate to a bobbin and a transformer device.

Background

A transformer (transformer) is a device that converts a voltage into a voltage required by a corresponding electric product. In recent years, as electronic devices including displays have been increasingly downsized and thinned, transformer devices incorporated in the electronic devices have also been downsized and thinned.

Documents of the prior art

Patent document

(patent document 1) Korean laid-open patent publication No. 10-2008-0031481 (2008.04.08)

SUMMERY OF THE UTILITY MODEL

Solves the technical problem

Embodiments of the present invention provide a spool and a transformer apparatus that can be miniaturized.

Technical scheme

The voltage transformation device according to an embodiment of the present invention includes: a bobbin including a first body part on which a first coil is wound and including a coil wound part having a core insertion hole provided at an inner side, and a second body part on which a second coil is wound and provided with a receiving hole into which the coil wound part is inserted to be received, and coupled with the first body part at an outer side of the first body part; a first core member attached to upper sides of the first and second body portions; and a second core member mounted to lower sides of the first and second body parts, wherein at least one of the first and second core members includes a core member partially inserted into the core insertion hole, the first and second body parts are combined in a vertical direction, and when the coil wound part is inserted into the accommodation hole, top and bottom surfaces of the coil wound part and top and bottom surfaces of the second body part are respectively provided at the same height.

The transformation device may further include an insulation molding part provided to ensure at least one of an insulation distance between the first coil and the core member, an insulation distance between the second coil and the core member, and an insulation distance between the first coil and the second coil, outside the bobbin.

The first body part further includes a first connection pin member to which the first coil is connected and a first connection pin support part connected to one side of the coil winding part and supporting the first connection pin member; the second body part further includes a second connection pin member to which the second coil is connected, and a second connection pin support part provided in the second body part on an opposite side of the first connection pin support part and supporting the second connection pin member.

The insulating mold part may be provided to cover one end of the first connecting pin member connected to the first connecting pin support part and to cover one end of the second connecting pin member connected to the second connecting pin support part.

The coil winding part may include: a first base part having one side connected to the first connecting pin supporter; a first winding body part which is provided below the first base part and around which the first coil is wound; and a first cover portion that is provided to an outside of the first winding body portion in the first winding body portion and restricts downward movement of the first coil.

The second body portion may include: a second base part provided at an outer side of the first base part at a height corresponding to the first base part, and having a top surface at one side thereof mounted with a bottom surface of the first connecting pin supporter; a second winding main body portion provided below the second base portion and having an outer side around which the second coil is wound and an inner side provided with the accommodation hole; and a second covering portion that is provided to an outside of the second winding body portion in the second winding body portion and restricts downward movement of the second coil.

The width of the portion of the second base part installed at the bottom of the first coupling pin supporting part may be provided to be smaller than the width of the first coupling pin supporting part.

The insulating molding part may be provided to cover each side of the bobbin to prevent the second coil from being exposed to the outside.

The insulating mold may have a shape that is partially protruded to the outside of the bobbin so that the transformer device is mounted on the substrate.

The bobbin may further include a first edge barrier wall provided at a boundary of the first base part and the first coupling pin supporter and protrudingly provided along an edge of an end portion (opposite to the first base part) of the first coupling pin supporter.

The insulating mold section is provided on top surfaces of the first base section and the second base section, and may be provided lower than a height of the first edge partition wall or the first core member.

The bobbin may further include an extension mounting part connected to the other side of the first base part and having a bottom surface mounting a top surface of the other side of the second base part, and a second edge partition wall provided at a boundary of the first base part and the extension mounting part.

The insulation molding part is provided to the extension mounting part at the top surface of the bobbin, and may be provided lower than the height of the second edge partition wall.

The bobbin may further include a coil connection hole provided to the first body portion, the first connection pin support portion being cut inward from a portion of the coil wound portion to expose the first coil to the outside, and serving to connect the first coil to the first connection pin member.

The insulating molding part is provided to the first connection pin support part at the bobbin top surface, and may be provided to cover the coil connection hole.

The bobbin may further include at least one of a first insulating member provided to cover the second coil at one end portion of the bobbin, a second insulating member provided to cover the second coil at one side portion in a length direction of the bobbin, and a third insulating member provided to cover the second coil at the other side portion in the length direction of the bobbin.

The width of the first insulating member may be provided to be greater than the width of the second coil and less than the width of the second body portion.

The second insulating member and the third insulating member may be provided to have a length greater than that of the core insertion hole.

The bobbin may further include at least one bobbin fixing part coupled to the first and second body parts to fix the first and second body parts.

The bobbin fixing part can include installation supporting part, a pair of side supporting part and hook portion, the installation supporting part is in the bottom surface installation of second main part and to the width direction of second main part is equipped with, a pair of side supporting part is in the both sides of installation supporting part are equipped with to the top, hook portion be equipped with in the upper end of a pair of side supporting part and be equipped with for the joint extremely the top surface of first main part.

The bobbin fixing part may further include a pair of elastic support parts having one ends respectively connected to side portions of the pair of side support parts, the other ends being bent to be opposite to each other, and the other ends being spaced apart from each other.

A spool according to an embodiment of the present invention includes: a first body part on which a first coil is wound and including a coil winding part having a core insertion hole provided inside; and a second body part on which a second coil is wound and which is provided with a receiving hole into which the coil winding part is inserted to be received, and is combined with the first body part at an outer side of the first body part, wherein the first body part and the second body part are combined in a vertical direction, and when the coil winding part is inserted into the receiving hole, top and bottom surfaces of the coil winding part and top and bottom surfaces of the second body part are respectively provided at the same height.

Advantageous effects

According to the disclosed embodiments, the coil wound part of the first body part is inserted into the receiving hole of the second body part and received, and the coil wound part is provided at the same height as the second body part, and thus it is possible to minimize the thickness of the transformer device and secure a winding area of the coil.

In addition, the first insulating member is formed at one end of the bobbin where the first connecting pin supporting portion is formed, so that an insulating distance between the first coil and the second coil can be secured, thereby shortening the length of the bobbin and enabling the transformer apparatus to be miniaturized.

In addition, by attaching the second insulating member and the third insulating member to both side portions of the bobbin, the insulating distance between the first coil and the core member and the insulating distance between the second coil and the core member can be ensured at the same time, and the winding area can also be maintained. In addition, an insulation distance between the first coil and the second coil can be ensured.

In addition, by forming the insulating molding part on each of the side, top and bottom surfaces of the bobbin, it is possible to secure an insulation distance between the first coil and the core member, an insulation distance between the second coil and the core member, and an insulation distance between the first coil and the second coil, and to improve the temperature characteristics of the transformer apparatus.

In addition, by attaching the first to third insulating members to the bobbin and forming the insulating molding part at each of the side, top and bottom surfaces of the bobbin, it is possible to dually ensure the insulating distance between the first coil and the core member, the insulating distance between the second coil and the core member, and the insulating distance between the first coil and the second coil.

Drawings

Fig. 1 is a combined perspective view of a transforming apparatus according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of a voltage transformation device according to an embodiment of the present invention.

Fig. 3 is a perspective view illustrating a bobbin in a transformer apparatus according to an embodiment of the present invention.

Fig. 4 is a sectional view illustrating a bobbin in a transformer apparatus according to an embodiment of the present invention.

Fig. 5 is an exploded perspective view illustrating a bottom surface of a bobbin in a transformer apparatus according to an embodiment of the present invention.

Fig. 6 is a diagram illustrating a state before an insulating member is attached in a transforming apparatus according to an embodiment of the present invention.

Fig. 7 is a diagram illustrating an attached state of an insulating member in a transforming apparatus according to an embodiment of the present invention.

Fig. 8 is a plan view showing the first body portion and the second body portion in one disclosed embodiment.

Fig. 9 is a perspective view illustrating a state in which a transforming device according to an embodiment of the present invention is mounted on a substrate.

Fig. 10 is a perspective view illustrating a state in which a transforming device according to an embodiment of the present invention is mounted on a substrate.

Fig. 11 is a plan view illustrating a transforming apparatus according to another embodiment of the present invention.

Fig. 12 is a sectional view showing an I-I' direction section in a pressure changing device according to another embodiment of the present invention.

Description of the mark

100: transformation device, 101: bobbin, 102: first body portion, 104: second body portion, 106: bobbin fixing part, 106-1: first bobbin fixing section, 106-2: second bobbin fixing section, 106 a: mounting support portion, 106 b: a pair of side support portions 106 c: a pair of elastic support portions 106 d: substrate mounting projection, 106 e: hook portion, 108: core member, 108-1: first core member, 108-1 a: first core main body, 108-1 b: first core lobe, 108-1 c: first side lobe, 108-2: second core member, 108-2 a: second core main body, 108-2 b: second core boss, 108-2 c: second-side raised portion, 110: insulating member, 110-1: first insulating member, 110-2: second insulating member, 110-3: third insulating member, 111: coil winding sections 113; first connecting pin support portion, 113 a: first connecting pin support projection, 115: extension attachment portion, 117: first edge partition wall, 119: second edge partition wall, 121: first base part, 123: first winding body, 125: first cover portion, 127: first extension portion, 129: core insertion hole, 131: first connecting pin member, 133: first catching projection, 135: second catching projection, 137: second connecting pin support portion, 139: second connecting pin member, 141: second base part, 143: second winding body, 145: second cover portion, 147: second extension, 147-1: 2-1 extension, 147-2: 2 nd-2 nd extension, 149: accommodation hole, 151: anti-error slot, 153: misplug prevention protrusion, 157: coil connection hole, 160: substrate, 162: transformer device accommodation hole, 164: first connecting pin insertion hole, 166: second connecting pin insertion hole, 170: insulating molding part

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following detailed description is provided to facilitate an understanding of a thorough understanding of the methods, apparatuses, and/or systems illustrated in the present specification. This is merely an example and the present invention is not limited thereto.

In describing the embodiments of the present invention, a detailed description of known technologies related to the present invention will be omitted when it is considered that the core of the present invention may be obscured. In addition, a plurality of terms to be described later are terms defined in consideration of their functions in the present invention, and may vary according to the purpose or practice of a user, an operator, and the like. Therefore, it should be defined based on the contents throughout the present specification. The terminology used in the detailed description is for the purpose of describing particular embodiments only and is not intended to be limiting in any way. Expressions in the singular include expressions in the plural unless explicitly stated otherwise. In the present description, expressions such as "include" or "be equipped" are used to refer to certain features, numbers, steps, operations, factors, parts or combinations thereof, and are not to be construed as excluding the existence or possibility of one or more other features, numbers, steps, operations, factors, parts or combinations thereof other than those described.

On the other hand, directional terms such as upper, lower, one side, the other side, and the like are used in association with the arrangement direction in the accompanying drawings. Components of embodiments of the present invention may be positioned in a variety of configurations and orientations, and accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Moreover, the terms first, second, etc. may be used to describe various components, but the components are not limited by the terms. The terms may be used to distinguish one component from another component. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the claimed invention.

Fig. 1 is a combined perspective view of a transforming device according to an embodiment of the present invention, fig. 2 is an exploded perspective view of the transforming device according to an embodiment of the present invention, fig. 3 is a perspective view illustrating a bobbin in the transforming device according to an embodiment of the present invention, fig. 4 is a sectional view illustrating the bobbin in the transforming device according to an embodiment of the present invention, and fig. 5 is an exploded perspective view illustrating a bottom surface of the bobbin in the transforming device according to an embodiment of the present invention.

Referring to fig. 1-5, a voltage transformation device 100 may include a first body portion 102, a second body portion 104, a bobbin securing portion 106, and a core member 108.

The bobbin fixing part 106 may include a first bobbin fixing part 106-1 and a second bobbin fixing part 106-2. The core member 108 may include a first core member 108-1 and a second core member 108-2.

Therein, the first and second body portions 102 and 104 are portions where a coil is wound, which may constitute a Bobbin (Bobbin).

The first coil 50 is wound on the first body portion 102. The first body portion 102 may include a coil wound portion 111, a first connection pin supporting portion 113, and an extension mounting portion 115.

The coil winding part 111 may be a component for winding the first coil 50 on the first body part 102. The coil winding portion 111 may include a first base portion 121, a first winding body portion 123, a first cover portion 125, and a first extension portion 127.

The first base part 121 may be provided to connect the first coupling pin supporter 113 and the extension mounting part 115 between the first coupling pin supporter 113 and the extension mounting part 115. The first base part 121 may be provided parallel to the first coupling pin supporting part 113 and the extended mounting part 115. The first base part 121 may be provided in a flat plate shape.

The bottom surface of the first base part 121 may be provided lower than the first coupling pin supporting part 113 and the extension mounting part 115. That is, the bottom surface of the first base part 121 may be provided in a staggered manner with respect to the first connecting pin supporting part 113 and the extension mounting part 115. Thus, the top surface of the second body portion 104 is mounted to the bottom surfaces of the first connecting pin supporting portion 113 and the extended mounting portion 115, so that the top surface of the first body portion 102 and the top surface of the second body portion 104 form the same height.

In addition, since the bottom surface of the first base part 121 is provided in a staggered manner with respect to the first connecting pin supporting part 113 and the extension attaching part 115, the region around which the first coil 50 is wound (the region of the bottom surface of the first base part 121) can be visually recognized. Thereby, in the coil wound portion 111, the first coil 50 can be easily wound to the bottom surface region of the first base portion 121.

The first winding body 123 may protrude downward from the bottom surface of the first base part 121. The first coil 50 may be wound on the outer circumferential surface of the first winding body portion 123. In an exemplary embodiment, the first winding body part 123 may be provided in a rectangular tube or a cylindrical shape protruding downward from the bottom surface of the first base part 121, but the shape thereof is not limited thereto, and it may be provided in various shapes capable of winding the first coil 50.

A core insertion hole 129 may be provided at an inner side of the first winding body portion 123 to allow a portion of the first core piece 108-1 and a portion of the second core piece 108-2 to be inserted, respectively. The core insertion hole 129 may be provided in a height direction (i.e., up-down direction) of the first body 120. Here, the height direction may refer to a Z-axis direction in fig. 2. The core insertion hole 129 may be provided through the first base part 121. The core insertion hole 129 may be provided along a length direction of the first body portion 102. Wherein, the length direction may refer to an X-axis direction in fig. 2.

The first cover portion 125 may be provided at the lower end of the first winding body portion 123 toward the outside of the first winding body portion 123. In an exemplary embodiment, the first cover portion 125 may be provided to be parallel to the first base portion 121. That is, the first cover portion 125 may be provided in a plate shape extending horizontally to the outside of the first wound body portion 123 at the lower end of the first wound body portion 123.

Since the first covering portion 125 is provided at the lower end of the first winding body portion 123 toward the outside of the first winding body portion 123, the first coil 50 wound around the outer peripheral surface of the first winding body portion 123 can be wound between the first covering portion 125 and the bottom surface of the first base portion 121 while being restricted by the first covering portion 125 from moving downward.

The first extending portion 127 may be provided to extend on both sides of the first cover portion 125. The first extension portion 127 may be provided to be inclined downward at both sides of the first cover portion 125. In an exemplary embodiment, the first base part 121, the first winding body part 123, the first cover part 125, and the first extension part 127 may be provided as one body.

In addition, the first base portion 121, the first winding body portion 123, the first cover portion 125 and the first extending portion 127 may be made of an insulating material.

An anti-misinsertion groove 151 may be provided at an end of the first extension part 127. In an exemplary embodiment, the anti-misinsertion groove 151 may be provided at an end of the first extension part 127 corresponding to the first connection pin support part 113, but is not limited thereto. The anti-misinsertion groove 151 may have a function of preventing the second body portion 104 from being coupled to the first body portion 102 in a wrong direction. This will be described in detail later.

The first coupling pin supporter 113 may be provided at one side of the first base part 121. The first coupling pin supporter 113 may be vertically coupled to the first base part 121. That is, the first connecting pin support portion 113 may be provided to extend in the width direction of the first base portion 121 on one side of the first base portion 121. Here, the width direction may refer to a Y-axis direction in fig. 2.

At least one first connection pin member 131 may be provided at an outer end (end toward the outside) of the first connection pin support part 113, which is connected with the first coil 50. The first connecting pin member 131 may be connected with a first connecting pin supporting protrusion 113a protrudingly provided on the top surface of the first connecting pin supporting part 113.

Both sides of the top surface of the first coupling pin supporting part 113 may be provided with first catching protrusions 133. The end of the first bobbin fixing part 106-1 may be fixed by being caught to the first catching protrusion 133.

On the other hand, the first body portion 102 may be provided with a coil connection hole 157. In an exemplary embodiment, the coil connection hole 157 may be provided by cutting a portion of the first connection pin support part 113 and a portion of the first base part 121 inward. The coil connection hole 157 is used to directly connect the first coil 50 wound on the coil winding part 111 to the first connection pin member 131 provided to the first connection pin support part 113 through the coil connection hole 157. The coil connection hole 157 may be provided to expose the first coil 50 to the outside from above the first connection pin support part 113 when the second body part 104 is combined with the first body part 102.

In addition, the first body portion 102 may be provided with a first edge partition wall 117. The first edge partition wall 117 may be provided at a boundary between the first base part 121 and the first connecting pin supporter 113. The first edge partition wall 117 may be provided to protrude along an edge of one end portion (an end portion opposite to the first base portion 121) of the first connecting pin supporter 113. The first edge partition 117 may be provided to secure an insulation distance between the first coil 50 and the first core member 108-1.

The extension mounting part 115 may be connected to the other side of the first base part 121. The extension mounting part 115 may be vertically connected with the first base part 121. The extension mounting part 115 may be provided to extend in the width direction of the first base part 121 on the other side of the first base part 121. The bottom surface of the extension mounting part 115 may be mounted to the top surface of the second body part 104.

Second catching projections 135 may be provided at both sides of the top surface of the extension mounting part 115. The end of the second bobbin fixing part 106-2 may be fixed by being caught to the second catching protrusion 135.

Further, a second edge partition 119 may be provided between the first base portion 121 and the extension mounting portion 115. The second edge partition 119 may be provided at a boundary between the first base portion 121 and the extension mounting portion 115. The second edge partition 119 may be provided to protrude along an edge of one end portion (an end portion opposite to the first base portion 121) of the extension mounting portion 115.

The second coil 60 is wound around the second body portion 104. The second body portion 104 may be coupled to the first body portion 102 below the first body portion 102. In an exemplary embodiment, the second body portion 104 may be forced upward in a state of being located below the first body portion 102, thereby being coupled with the first body portion 102. In addition, when the first body portion 102 is disposed above the second body portion 104, the first body portion 102 may be coupled to the second body portion 104 by being biased downward. That is, the first and second body portions 102 and 104 may be coupled to each other by being forced in a vertical direction.

The second body portion 104 may include a second base portion 141, a second wound body portion 143, a second cover portion 145, and a second extension portion 147.

The second base part 141 may be mounted to the bottom surfaces of the first coupling pin supporting part 113 and the extension mounting part 115 at the outer side of the first base part 121. The second base part 141 may be provided to contact the first base part 121 at an outer side of the first base part 121.

First pedestal portion 121 may be provided at a height corresponding to the thickness of second pedestal portion 141, lower than the bottom surfaces of first connecting pin supporting portion 113 and extension mounting portion 115. At this time, when second base part 141 is attached to the bottom surfaces of first connecting pin supporting part 113 and extension attaching part 115 from the outside of first base part 121, second base part 141 is arranged at a height corresponding to that of first base part 121.

That is, the top surface of the second base part 141 and the top surface of the first base part 121 may be arranged on the same plane. The bottom surface of the second base portion 141 and the bottom surface of the first base portion 121 may be arranged on the same plane. The second base part 141 may be provided outside the first base part 121 without being staggered from the first base part 121. The boundary surface of the first pedestal portion 121 contacting the second pedestal portion 141 may be provided at the same height.

A second coupling pin support part 137 may be provided on one side of the second base part 141. The second coupling pin supporting part 137 may be provided in the second base part 141 at a side corresponding to the extension mounting part 115. The second coupling pin supporting part 137 may be provided to protrude upward on one side of the second base part 141. That is, the second coupling pin support part 137 may be provided at a height higher than the top surface of the second base part 141.

In an exemplary embodiment, the height of the second connecting pin support 137 may be provided to correspond to the height of the second edge partition 119 when the second body part 104 is combined with the first body part 102. At least one second connecting pin part 139 may be provided on an end of the second connecting pin supporting part 137, which is connected with the second coil 60.

The second winding body 143 may be provided to protrude downward from the bottom surface of the second base 141. The second coil 60 may be wound around the outer circumferential surface of the second winding body 143. In an exemplary embodiment, the second winding body part 143 may be provided in a rectangular tube or a cylindrical shape protruding downward at the bottom surface of the second base part 141, but the shape thereof is not limited thereto, and it may be provided in various shapes capable of winding the second coil 60.

A receiving hole 149, into which the coil winding part 111 is inserted and received, may be provided at the inner side of the second winding body part 143. The accommodation hole 149 may be provided corresponding to an area of the coil winding part 111. The accommodation hole 149 may be provided in the height direction of the second body 104. The accommodation hole 149 may be provided to penetrate the second base part 141. The receiving hole 149 may be provided along a length direction of the second body portion 104.

When the second body 104 is disposed below the first body 102 and then is biased upward, the second body 104 is vertically coupled to the first body 102, and the coil winding portion 111 is inserted into and received in the receiving hole 149. At this time, the coil winding portion 111 has a shape surrounded by the second winding body portion 143. Thereby, the second body portion 104 may protect the first coil 50 from the external environment. In addition, the outward movement of the first coil 50 may be restricted by the second body portion 104. When the coil wound part 111 is inserted into the receiving hole 149, the top and bottom surfaces of the coil wound part 111 may be provided corresponding to the height of the top and bottom surfaces of the second body part 104.

The second winding body portion 143 may be provided with a mis-insertion prevention protrusion 153. In an exemplary embodiment, the mis-insertion prevention protrusion 153 may be protrusively provided on an inner wall of the second winding body portion 143. That is, the erroneous insertion preventing projection 153 may be provided on the inner wall of the second winding body 143 so as to protrude toward the accommodating hole 149. The erroneous insertion preventing protrusion 153 may be provided to be inserted into the erroneous insertion preventing groove 151 when the second body portion 104 is vertically combined with the first body portion 102. The disclosure is directed to the anti-misplug slot 151 formed on the first extending portion 127, and the anti-misplug 153 formed on the second winding body portion 143, but the disclosure is not limited thereto, and the anti-misplug 153 may be formed on the first extending portion 127, and the anti-misplug slot 151 may also be formed on the second winding body portion 143.

The anti-misplug slot 151 and the anti-misplug protrusion 153 are used for preventing the second main body part 104 from being reversely combined when being combined with the first main body part 102 so as to enable the second main body part 104 to be combined with the first main body part 102 in a forward direction. Here, the forward direction may refer to a direction in which a portion of the second coupling pin supporter 137, which is not formed, is mounted to the bottom surface of the first coupling pin supporter 113 in the second base part 141, and a portion of the second coupling pin supporter 137, which is formed, is mounted to the extension mounting part 115. In addition, the reverse direction may refer to a direction opposite to the forward direction. The erroneous insertion preventing groove 151 and the erroneous insertion preventing protrusion 153 may become erroneous insertion preventing portions.

The second cover portion 145 may be provided at a lower end of the second winding body portion 143 to the outside of the second winding body portion 143. In an exemplary embodiment, the second cover portion 145 may be provided to be parallel to the second base portion 141. That is, the second covering portion 145 may be provided in a plate shape extending horizontally outward of the second winding body portion 143 at the lower end of the second winding body portion 143.

Since the second covering portion 145 is provided at the lower end of the second winding body portion 143 toward the outside of the second winding body portion 143, the downward movement of the second coil 60 wound around the outer circumferential surface of the second winding body portion 143 is restricted by the second covering portion 145, and thus the second covering portion 145 can be wound around the bottom surface of the second base portion 141.

When the second body portion 104 is combined with the first body portion 102, the second cover portion 145 may be provided in contact with the first cover portion 125 at both sides in the width direction of the first cover portion 125. In addition, the second cover portion 145 may be disposed at a height corresponding to the first cover portion 125. That is, the top surface of the second cover portion 145 and the top surface of the first cover portion 125 may be disposed on the same plane. The bottom surface of the second cover portion 145 and the bottom surface of the first cover portion 125 may be disposed on the same plane. The second cover portion 145 may be provided on both sides of the first cover portion 125 in the width direction without being staggered from the first cover portion 125. The boundary surface where the first cover portion 125 contacts with the second cover portion 145 may be provided at the same height.

The second extension portion 147 may be provided to extend on both sides of the second cover portion 145. In an exemplary embodiment, the second base part 141, the second winding body part 143, the second cover part 145, and the second extension part 147 may be provided as one body. In addition, the second base part 141, the second winding body part 143, the second covering part 145 and the second extending part 147 may be made of an insulating material.

The second extension 147 may include a 2 nd-1 st extension 147-1 and a 2 nd-2 nd extension 147-2. The 2 nd-1 st extension 147-1 may extend downward on both sides of the second cover portion 145. In an exemplary embodiment, the 2 nd-1 st extension 147-1 may obliquely extend to the lower side at both sides of the second cover portion 145. The 2 nd-2 nd extension 147-2 may extend in a horizontal direction at the end of the 2 nd-1 st extension 147-1.

The 2 nd-1 st extension 147-1 may be provided in contact with the first extension 127 at an outer side of the first extension 127 when the second body portion 104 is combined with the first body portion 102. The inclination of the first extension 127 and the 2 nd-1 st extension 147-1 may be provided identically. Thus, the 2 nd-1 th extension 147-1 may be provided outside the first extension 127 without being staggered from the first extension 127.

As described above, the coil wound part 111 of the first body part 102 is inserted into the receiving hole 149 of the second body part 104 and received, and the thickness of the transformer apparatus 100 may be minimized because the heights of the coil wound part 111 and the second body part 104 are the same (i.e., the top and bottom surfaces of the coil wound part 111 and the top and bottom surfaces of the second body part 104 are respectively disposed on the same plane).

The bobbin fixing portion 106 may have a function of fixing the first body portion 102 and the second body portion 104 in a state where the first body portion 102 and the second body portion 104 are coupled.

The first bobbin fixing part 106-1 may fix the first and second body parts 102 and 104 at one sides of the first and second body parts 102 and 104.

The second bobbin fixing part 106-2 may fix the first and second body parts 102 and 104 at the other side of the first and second body parts 102 and 104.

The bobbin fixing part 106 may include a mounting support 106a, a pair of side supports 106b, and a pair of elastic supports 106 c. The mounting support portion 106a may be provided below the second body portion 104 in the width direction of the second body portion 104. The mounting support 106a may be mounted to the bottom surface of the 2 nd-2 nd extension 147-2. The width of the mounting support 106a may be provided to be smaller than the 2 nd-2 nd extension 147-2 width.

The pair of side supporting portions 106b may be provided upward on both sides of the mounting supporting portion 106 a. The substrate mounting projection 106d may be provided to protrude outward from the outer surfaces of the pair of side surface supporting portions 106 b. The voltage transforming device 100 may be mounted to one side of a substrate (not shown) due to the substrate mounting protrusions 106 d.

Further, a hook portion 106e may be provided on the end portions of the pair of side support portions 106 b. The hook 106e can be snapped onto the top surface of the first body portion 102. Specifically, the hook portion 106e of the first bobbin fixing portion 106-1 may be fixed by being caught to the first catching protrusion 133. The hook portion 106e of the second bobbin fixing portion 106-2 may be fixed by being caught to the second catching protrusion 135.

One ends of the pair of elastic supports 106c may be connected to the side portions of the pair of side supports 106b, respectively, and the other ends thereof may be equipped to be bent to be opposite to each other. At this time, the other ends of the pair of elastic supports 106c may be provided spaced apart from each other.

The bobbin fixing part 106 is fixed below the second body 104, and the pair of side supports 106b are extended to both sides, so that the hook part 106e is engaged with the first engaging protrusion 133 and the second engaging protrusion 135. At this time, the pair of side supporting parts 106b can be easily spread and coupled to both sides as the other ends of the pair of elastic supporting parts 106c are spaced apart from each other.

The core member 108 may serve as a magnetic core of the transformer apparatus 100. The core member 108 may include a first core member 108-1 and a second core member 108-2. The first core piece 108-1 may be mounted on an upper side of the first and second body portions 102, 104 and the second core piece 108-2 may be mounted on a lower side of the first and second body portions 102, 104.

The first core piece 108-1 may include a first core body 108-1a, a first core projection 108-1b, and a first side projection 108-1 c. The first core body 108-1a may be provided in a flat plate shape. The first core body 108-1a may be mounted on the upper sides of the first and second body portions 102 and 104.

The first core protrusion 108-1b may be provided to protrude downward from the bottom surface of the first core main body 108-1 a. The first core protrusion 108-1b may be provided to correspond to the core insertion hole 129. The first core protrusion 108-1b may be inserted into the core insertion hole 129.

The first side projections 108-1c may protrude downward at both sides of the first core main body 108-1 a. The first side projection 108-1c may be provided to cover both sides of the second main body portion 104 when the first core main body 108-1a is mounted on the upper sides of the first and second main body portions 102 and 104.

The second core component 108-2 can include a second core body 108-2a, a second core boss 108-2b, and a second side boss 108-2 c. The second core body 108-2a may be provided in a flat plate shape. The second core body 108-2a may be mounted to the underside of the first and second body portions 102 and 104.

The second core protrusion 108-2b may be provided to protrude upward from the top surface of the second core main body 108-2 a. The second core protrusion 108-2b may be provided to correspond to the core insertion hole 129. The second core boss 108-2b may be inserted into the core insertion hole 129.

The second side projections 108-2c may protrude upward on both sides of the second core main body 108-2 a. The second side projection 108-2c may be provided to cover both sides of the second main body portion 104 when the second core main body 108-2a is mounted to the lower sides of the first and second main body portions 102 and 104.

Here, it is described that the first core member 108-1 and the second core member 108-2 are composed in an EE shape and are partially inserted into the insertion holes 129, respectively, but not limited thereto, and in addition, various shapes of core members such as an EI shape, an EVD shape, an EED shape, an EP shape, an EEH shape, and the like may be used for the first core member 108-1 and the second core member 108-2. The core member 108 may be partially inserted into the core insertion hole 129 by at least one of the first core member 108-1 and the second core member 108-2 according to its shape.

On the other hand, the transformer apparatus 100 may further include an insulating member 110 for ensuring an insulating distance between the first coil 50, the second coil 60 and the core member 108, and an insulating distance between the first coil 50 and the second coil 60. Fig. 6 is a view showing a state before an insulating member is attached in a transformation apparatus according to an embodiment of the present invention, and fig. 7 is a view showing an attached state of an insulating member in a transformation apparatus according to an embodiment of the present invention.

Referring to fig. 6 to 7, the insulation member 110 may include a first insulation member 110-1, a second insulation member 110-2, and a third insulation member 110-3. In an exemplary embodiment, the insulating member 110 may be attached to the bobbin 101 in a shape corresponding to the shape of the bobbin 101. For example, an insulating tape may be used in the insulating member 110, but is not limited thereto.

The first insulating member 110-1 may be attached to one end portion in the length direction of the bobbin 101 where the first body portion 102 is combined with the second body portion 104. Specifically, the first insulating member 110-1 may be attached to one end of the bobbin 101 forming the first connecting pin support 113. The first insulating member 110-1 may be provided at one end portion of the bobbin 101 to cover the second coil 60 wound on the second winding main body portion 143.

The first insulating member 110-1 is attached to the top surface of the second base part 141 (i.e., attached between the first connecting pin supporter 113 and the second base part 141) and bent downward, thereby covering the second coil 60 and attached to the bottom surface of the 2 nd-2 nd extending part 147-2. Thereby, the first insulating member 110-1 may have a role of securing an insulating distance between the first coil 50 and the second coil 60 connected to the first connection pin supporting part 113.

Wherein the width of the first insulating member 110-1 may be provided to be greater than the width of the second coil 60. In addition, the width of the first insulating member 110-1 may be provided to be smaller than the width of the second base part 141.

The second insulating member 110-2 and the third insulating member 110-3 may be attached to both side portions in the lengthwise direction of the bobbin 101, respectively. The second insulating member 110-2 and the third insulating member 110-3 may be provided to cover the second coil 60 at both side portions of the bobbin 101, respectively. The second insulating member 110-2 and the third insulating member 110-3 may be provided to cover the top, side and bottom surfaces of both side portions of the bobbin 101.

At this time, the second insulating member 110-2 and the third insulating member 110-3 are equipped to cover the boundary between the first base part 121 and the second base part 141 at the upper side of the bobbin 101 and to cover the boundary between the first cover part 125 and the second cover part 145 at the lower side of the bobbin 101. The second and third insulating members 110-2 and 110-3 may have a function of securing an insulating distance between the first and second coils 50 and 60.

The second insulating member 110-2 and the third insulating member 110-3 may be provided longer than the length of the core insertion hole 129. The second and third insulating members 110-2 and 110-3 may have an extended length L1 extending at both ends of the core insertion hole 129. Wherein the extension length L1 may be a distance from both ends of the core insertion hole 129 to an end of the first base part 121. That is, the second insulating member 110-2 and the third insulating member 110-3 may be provided corresponding to the length of the first base part 121.

On the other hand, in a state where the first insulating member 110-1 is provided at one end portion in the length direction of the bobbin 101 and the second insulating member 110-2 and the third insulating member 110-3 are provided at both side portions of the bobbin 101, the first and second bobbin fixing portions 106-1 and 106-2 may be coupled to both sides of the bobbin 101. The first bobbin fixing part 106-1 may have a role of attaching the first insulating member 110-1 to the bobbin 101.

The mounting support portion 106a of the first bobbin fixing portion 106-1 is pressed below the first insulating member 110-1 attached to the bottom surface of the 2 nd-2 th extension portion 147-2, and the pair of elastic support portions 106c of the first bobbin fixing portion 106-1 are pressed to the side portion of the first insulating member 110-1, so that the first insulating member 110-1 can be prevented from being lifted and tightly attached to the bobbin 101 during a post-process such as a soldering operation or a dipping operation.

In addition, in a state where the first insulating member 110-1 is provided at one end portion in the length direction of the bobbin 101 and the second and third insulating members 110-2 and 110-3 are provided at both side portions of the bobbin 101, the first core member 108-1 and the second core member 108-2 may be inserted into the core insertion hole 129 and mounted, respectively. At this time, the first core member 108-1 and the second core member 108-2 may be disposed outside the second insulation member 110-2 and the third insulation member 110-3. Due to the second and third insulating members 110-2 and 110-3 as described above, it is possible to stably secure the insulation distance between the first and second coils 50 and 60 and the core member 108, and the insulation distance between the first and second coils 50 and 60.

That is, by attaching the second insulating member 110-2 and the third insulating member 110-3 to both side portions of the bobbin 101, the insulating distance between the first coil 50 and the core member 108 and the insulating distance between the second coil 60 and the core member 108 can be simultaneously ensured, and the winding area can also be ensured.

On the other hand, in the disclosed embodiment, by forming the first insulating member 110-1 at the one end portion of the first connecting pin support portion 113 in the bobbin 101, it is possible to secure an insulating distance between the first coil 50 and the second coil 60, thereby shortening the length of the bobbin 101 and enabling miniaturization of the transformer apparatus 100. That is, by forming the first insulating member 110-1 at one end portion of the first connection pin support portion 113 in the bobbin 101, it may not be necessary to extend the length of the second body portion 104 to secure the insulating distance between the first coil 50 and the second coil 60.

Fig. 8 is a plan view showing the first body portion and the second body portion in one disclosed embodiment. Referring to fig. 8, the width D2 of the second base part 141 mounted to the bottom portion of the first coupling pin supporter 113 may be provided to be smaller than the width D1 of the first coupling pin supporter 113. That is, even if the width D2 of the second base part 141 attached to the bottom surface portion of the first connecting pin support part 113 is set to be smaller than the width D1 of the first connecting pin support part 113, the first insulating member 110-1 is formed at one end of the bobbin 101, so that the insulating distance between the first coil 50 and the second coil 60 can be secured, and thus the length can be minimized while maintaining the performance of the transformer apparatus 100.

Fig. 9 is a perspective view illustrating a state where a transforming device according to an embodiment of the present invention is mounted on a substrate, and fig. 10 is a perspective view illustrating a state where the transforming device according to an embodiment of the present invention is mounted on the substrate.

Referring to fig. 9 and 10, the substrate 160 may be provided with a transformation device receiving hole 162 to receive the transformation device 100. Although the transformer device receiving hole 162 is shown to be provided in the center of the substrate 160, the position of the transformer device receiving hole 162 is not limited thereto. In addition, the substrate 160 may be provided with a first connecting pin insertion hole 164 and a second connecting pin insertion hole 166 into which the first connecting pin member 131 and the second connecting pin member 139 are inserted, respectively.

The transformer apparatus 100 may be attached to the base plate 160 by the mounting protrusions 106d of the first bobbin fixing part 106-1 and the second bobbin fixing part 106-2 being mounted on the top surface of the base plate 160. Further, the first connecting pin member 131 and the second connecting pin member 139 are inserted into and fixed to the first connecting pin insertion hole 164 and the second connecting pin insertion hole 166, respectively, whereby the load of the first connecting pin member 131 and the second connecting pin member 139 can be distributed.

Fig. 11 is a plan view illustrating a voltage transforming apparatus according to another embodiment of the present invention, and fig. 12 is a sectional view illustrating an I-I' direction section in the voltage transforming apparatus according to another embodiment of the present invention.

Referring to fig. 11 to 12, the insulating mold section 170 may be mold-equipped in a state where the first core member 108-1 and the second core member 108-2 respectively inserted into the core insertion holes 129 are mounted to the bobbin 101 combined with the first body section 102 and the second body section 104. The insulating molding part 170 may be made of an insulating material and prepared by a molding process.

In an exemplary embodiment, the insulation molding part 170 may be molded without the insulation member 110 (i.e., the first insulation member 110-1, the second insulation member 110-2, and the third insulation member 110-3) being attached to the bobbin 101. That is, in order to secure the insulation distance between the first coil 50 and the core member 108, the insulation distance between the second coil 60 and the core member 108, and the insulation distance between the first coil 50 and the second coil 60, an insulation molding 170 may be formed instead of the insulation member 110.

Specifically, the insulating member 110 may be provided to cover each side of the bobbin 101. Since the second body portion 104 is coupled to the outside of the first body portion 102, the second coil 60 wound around the second body portion 104 is exposed to the outside. At this time, the insulating mold 170 may be provided to cover each side of the bobbin 101 to prevent the second coil 60 from being exposed to the outside. An insulating molding part 170 may be provided between the top surface of the second base part 141 and the bottom surface of the second extension part 147 at each side of the bobbin 101.

In addition, the insulating mold 170 may be provided on the top and bottom surfaces of the bobbin 101, respectively. At this time, the insulating mold 170 may be provided between the topmost and the bottommost of the transformer apparatus 100. The topmost end of the transformer apparatus 100 refers to the highest portion in the height direction (Z-axis direction), and the rearmost end of the transformer apparatus 100 refers to the lowest portion in the height direction.

The insulating mold 170 may be provided on the top surface of the bobbin 101 in the areas of the first and second base parts 121 and 141. That is, the insulating mold section 170 may be provided on the top surfaces of the first and second base sections 121 and 141. At this time, the insulating mold 170 may be provided lower than the heights of the first and second edge partition walls 117 and 119. In addition, the insulating mold 170 may be provided at a lower height than the first core member 108-1. The height at this time may be a height based on a direction opposite to (above) the gravity.

In addition, the insulating mold 170 may be provided between the first and second body portions 102 and 104. In an exemplary embodiment, the insulating mold 170 may be provided to surround each side of the first body portion 102. At this time, the insulating mold 170 may be provided to surround the first coil 50 wound on the first body portion 102.

In addition, an insulating molding part 170 may be provided on the first connecting pin support part 113 on the top surface of the bobbin 101. At this time, the insulating mold 170 may be provided lower than the height of the first edge partition wall 117. The insulating mold 170 may be provided to cover the coil connection hole 157. At this time, the insulating mold 170 covers the first coil 50 exposed through the coil connection hole 157 and connected to the first connection pin member 131, so that the first coil 50 can be prevented from being exposed to the outside. But is not limited thereto, the insulating mold 170 may be provided to cover only the coil connection hole 157 portion. The insulating mold 170 may be provided to cover one end of the first connecting pin member 131 connected to the first connecting pin support part 113.

In addition, the insulation molding part 170 may be provided on the extension mounting part 115 on the top surface of the bobbin 101. At this time, the insulating mold 170 may be provided lower than the height of the second edge partition 119. The insulating mold 170 may be provided to cover one end of the second connecting pin member 139 connected to the second connecting pin supporting part 137.

In addition, an insulating molding portion 170 may be provided on the bottom surface of the bobbin 101 in the areas of the first cover portion 125 and the second cover portion 145. That is, the insulating mold 170 may be provided at the bottom surfaces of the first cover portion 125 and the second cover portion 145. At this time, the insulating molding part 170 may be provided lower than the height of the 2 nd-2 nd extension 147-2 and the second core member 108-2. The height at this time may be a height based on the direction of gravity (downward).

As described above, by providing the insulating mold 170 on the bobbin 101, it is possible to secure the insulating distance between the first coil 50 and the core member 108, the insulating distance between the second coil 60 and the core member 108, and the insulating distance between the first coil 50 and the second coil 60.

Wherein an insulation molding part 170 may be provided at each desired region in order to secure an insulation distance between the first coil 50 and the core part 108, an insulation distance between the second coil 60 and the core part 108, and an insulation distance between the first coil 50 and the second coil 60.

In addition, since the insulating mold 170 is provided on the bobbin 101, heat is transferred from the first and second coils 50 and 60 generating heat to the insulating mold 170 and the core member 108, and heat is diffused, so that the temperature characteristics of the transformer apparatus 100 can be improved.

When the temperature characteristics of the insulating mold 170 were compared between the presence and absence thereof, the temperature of the transformer apparatus 100 was 72.8 ℃ in the state where the insulating mold 170 was not present, and the temperature of the transformer apparatus 100 was decreased by 4.7 ℃ to 68.1 ℃ in the case where the insulating mold 170 was formed.

In addition, the description has been made therein of ensuring the insulation distance between the first coil 50 and the core member 108, the insulation distance between the second coil 60 and the core member 108, and the insulation distance between the first coil 50 and the second coil 60, but not limited thereto, the insulation member 110 and the insulation molding part 170 may be formed all together.

That is, as shown in fig. 6, the first insulating member 110-1, the second insulating member 110-2, and the third insulating member 110-3 may be attached to the bobbin 101. In addition, the first core member 108-1 and the second core member 108-2 may be installed by being inserted into the core insertion hole 129. Next, an insulating molding portion 170 may be formed at each side, top, bottom, etc. of the bobbin 101.

At this time, the insulation distance between the first coil 50 and the core member 108, the insulation distance between the second coil 60 and the core member 108, and the insulation distance between the first coil 50 and the second coil 60 may be first ensured by the first insulation member 110-1, the second insulation member 110-2, and the third insulation member 110-3, and may be ensured again by the insulation molding part 170.

In addition, the description has been made therein of the insulating mold 170 being formed in a state where the first core member 108-1 and the second core member 108-2 are inserted into the core insertion hole 129, respectively, but not limited thereto, the insulating mold 170 may be formed first, and then the first core member 108-1 and the second core member 108-2 may be inserted into the core insertion hole 129 and mounted, respectively.

In addition, when the insulating mold 170 is formed on the bobbin 101, the bobbin fixing portion 106 may not be formed. That is, when the insulating mold 170 is formed on each side, top, and bottom surfaces of the bobbin 101, the first body portion 102 and the second body portion 104 may be fixed by the insulating mold 170, and thus the bobbin fixing portion 106 may not be separately formed.

In addition, a part of the insulating mold 170 may be formed to protrude outward, like the shape of the substrate mounting protrusion 106 d. At this time, the transformer apparatus 100 may be mounted on the substrate through a portion of the insulating mold 170 protruding outward.

In another embodiment, the insulating mold 170 may not be formed at the side of the first body portion 102, and the insulating mold 170 may be formed at the side of the second body portion 104. At this time, the insulating mold 170 may be formed on the top and bottom surfaces of the first and second body portions 102 and 104, respectively, but is not limited thereto, and the insulating mold 170 may not be formed on the top and bottom surfaces of the first and second body portions 102 and 104.

In another embodiment, an insulation molding part 170 is formed at a side of the first body part 102, and the first insulation member 110-1 is attached to one end of the bobbin 101 forming the first connection pin support part 113. At this time, the insulating mold 170 may be formed on the top and bottom surfaces of the first and second body portions 102 and 104, respectively, but is not limited thereto, and the insulating mold 170 may not be formed on the top and bottom surfaces of the first and second body portions 102 and 104.

While representative embodiments of the present invention have been described in detail, those skilled in the art to which the present invention pertains will appreciate that various modifications can be made to the above embodiments without departing from the scope of the present invention. Therefore, the scope of the claims of the present invention is not limited to the embodiments described above, but is defined by the claims and the equivalents of the claims.

Claims (22)

1. A voltage transformation device, comprising:

a bobbin including a first body part on which a first coil is wound and including a coil winding part having a core insertion hole provided at an inner side, and a second body part on which a second coil is wound and provided with a receiving hole into which the coil winding part is inserted to be received, and combined with the first body part at an outer side of the first body part; and

a core member including a first core member and a second core member, the second core member being mounted on upper sides of the first and second body portions, the second core member being mounted on lower sides of the first and second body portions, at least one of the first and second core members including a core member partially inserted into the core insertion hole,

wherein the first body part and the second body part are combined in a vertical direction, and when the coil wound part is inserted into the receiving hole, top and bottom surfaces of the coil wound part and top and bottom surfaces of the second body part are respectively provided at the same height.

2. The transforming device of claim 1, further comprising,

an insulation molding part provided at an outer side of the bobbin for securing at least one of an insulation distance between the first coil and the core member, an insulation distance between the second coil and the core member, and an insulation distance between the first coil and the second coil.

3. The transforming device of claim 2,

the first body part further includes a first connection pin member to which the first coil is connected and a first connection pin support part connected to one side of the coil winding part and supporting the first connection pin member;

the second body part further includes a second connection pin member to which the second coil is connected, and a second connection pin support part provided in the second body part on an opposite side of the first connection pin support part and supporting the second connection pin member.

4. The transforming device of claim 3,

the insulating mold section is provided to cover one end of the first connecting pin member connected to the first connecting pin support section and to cover one end of the second connecting pin member connected to the second connecting pin support section.

5. The transformation device according to claim 3, wherein the coil wound portion includes:

a first base part having one side connected to the first connecting pin supporter;

a first winding body part which is provided at a lower part of the first base part and around which the first coil is wound; and

a first cover portion that is provided from the first winding body portion to an outer side of the first winding body portion and restricts a lower portion of the first coil from moving.

6. The transformation device according to claim 5, wherein the second body portion comprises:

a second base part provided at an outer side of the first base part at a height corresponding to the first base part, and having a top surface at one side thereof mounted with a bottom surface of the first connecting pin supporter;

a second winding main body part provided at a lower part of the second base part and winding the second coil at an outer side thereof, and provided with the accommodation hole at an inner side thereof; and

a second covering portion that is provided from the second winding body portion to an outer side of the second winding body portion and restricts movement of a lower portion of the second coil.

7. The transforming device of claim 6,

the width of the second base portion fitted to the bottom surface portion of the first connecting pin supporting portion is provided to be smaller than the width of the first connecting pin supporting portion.

8. The transformation device of claim 6,

the insulating molding part is provided to cover each side of the bobbin to prevent the second coil from being exposed to the outside.

9. The transforming device of claim 8,

the insulating molding part is provided in a shape that a portion protrudes to the outside of the bobbin, and the transformer device is mounted on a substrate.

10. The transformation device of claim 6,

the bobbin further includes a first edge partition wall provided at a boundary of the first base part and the first coupling pin supporter and protrudingly provided along an edge of an end portion of the first coupling pin supporter opposite to the first base part.

11. The transforming device of claim 10,

the insulating mold section is provided on top surfaces of the first base section and the second base section, and is provided at a height lower than the first edge partition wall or the first core member.

12. The transformation device according to claim 6, wherein the bobbin further comprises:

an extension mounting part connected to the other side of the first base part and on which a top surface of the other side of the second base part is mounted; and

and a second edge partition wall provided at a boundary between the first base portion and the extension mounting portion.

13. The transforming device of claim 12,

the insulation molding part is provided to the extension mounting part at a top surface of the bobbin, and is provided at a lower height than the second edge partition wall.

14. The transforming device of claim 6,

the bobbin further includes a coil connection hole provided to the first body portion, the first connection pin support portion and a part of the coil winding portion being cut inward to expose the first coil to the outside, and serving to connect the first coil to the first connection pin member.

15. The transformation device of claim 14,

the insulating mold part is provided to the first connection pin support part, which is provided to the bobbin top surface and is provided to cover the coil connection hole.

16. The transforming device of claim 1,

the bobbin further includes at least one of a first insulating member equipped to cover the second coil at one end portion of the bobbin, a second insulating member equipped to cover the second coil at one side portion in a length direction of the bobbin, and a third insulating member equipped to cover the second coil at the other side portion in the length direction of the bobbin.

17. The transforming device of claim 16,

the width of the first insulating member is provided to be larger than the width of the second coil and smaller than the width of the second body portion.

18. The transforming device of claim 16,

the lengths of the second insulating member and the third insulating member are provided to be greater than the length of the core insertion hole.

19. The transforming device of claim 1,

the bobbin further includes at least one bobbin fixing part coupled to the first and second body parts to fix the first and second body parts.

20. The transformation device of claim 19, wherein the bobbin securing portion comprises:

a mounting support portion mounted on a bottom surface of the second body portion and provided in a width direction of the second body portion;

a pair of side supporting parts provided to an upper part at both sides of the mounting supporting part; and

and a hook part provided at upper ends of the pair of side supporting parts and provided to be snap-coupled to a top surface of the first body part.

21. The transforming device of claim 20,

the bobbin fixing part further includes a pair of elastic support parts having one ends respectively connected to side parts of the pair of side support parts, the other ends being bent to be opposite to each other, and the other ends being spaced apart from each other.

22. A spool, comprising:

a first body part on which a first coil is wound and including a coil winding part provided with a core insertion hole inside; and

a second body part on which a second coil is wound and which is provided with a receiving hole into which the coil wound part is inserted to be received, and is combined with the first body part at an outer side of the first body part,

wherein the first body part and the second body part are combined in a vertical direction, and when the coil wound part is inserted into the receiving hole, top and bottom surfaces of the coil wound part and top and bottom surfaces of the second body part are respectively provided at the same height.

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