CN217333820U

CN217333820U - Bobbin and transformer device

Info

Publication number: CN217333820U
Application number: CN202220679218.4U
Authority: CN
Inventors: 权宁珠; 朴钟奎
Original assignee: Kehui Bilus Co ltd
Current assignee: Kehui Bilus Co ltd
Priority date: 2021-04-01
Filing date: 2022-03-25
Publication date: 2022-08-30
Anticipated expiration: 2032-03-25
Also published as: KR20220136657A

Abstract

A bobbin and a transformer apparatus are disclosed. A transformation device according to one disclosed embodiment includes a first body portion, a second body portion, a core member, and one or more partitioned spaces. The first body portion includes a first coil winding portion on which a first coil is wound, and an inner side thereof is provided with a core insertion hole. The second body portion includes a second coil winding portion on which the second coil is wound and which is provided with a receiving hole inside thereof, and the first coil winding portion is inserted into the receiving hole and received. The core member includes a first core member mounted on upper sides of the first and second body portions, and a second core member mounted on lower sides of the first and second body portions, a part of at least one of the first and second core members being inserted into the core insertion hole. The partitioned space is used for allowing the insulating molding liquid to permeate into the interior of the transformed device.

Description

Bobbin and transformer device

Technical Field

The embodiment of the utility model relates to a spool and potential 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 miniaturized and made thin, the transformer devices mounted in the electronic devices have been also miniaturized and made thin.

Documents of the prior art

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

SUMMERY OF THE UTILITY MODEL

Embodiments of the present invention are directed to a bobbin that can be miniaturized, a transformer apparatus including the bobbin, and a method of manufacturing the same.

Embodiments of the present invention are directed to provide a bobbin that can ensure an insulation distance, a transformer apparatus including the bobbin, and a method of manufacturing the same.

Technical scheme

According to the utility model discloses a potential device includes: a first body part including a first coil winding part on which a first coil is wound and which is provided with a core insertion hole inside thereof; a second body part including a second coil winding part on which a second coil is wound and which is provided with a receiving hole inside thereof, the first coil winding part being inserted into the receiving hole and received; a core member including a first core member mounted on upper sides of the first and second body portions and a second core member mounted on lower sides of the first and second body portions, a portion of at least one of the first and second core members being inserted into the core insertion hole; and one or more partitioned spaces for allowing an insulating molding liquid to permeate into the interior of the transformer apparatus.

The first body part and the second body part constitute a bobbin of the voltage transforming device, and the partitioned space may include at least one of a first partitioned space formed between the first body part and the second body part and a second partitioned space formed between the bobbin and the core member.

The voltage transforming device may further include an insulating molding part provided to wrap the first and second body parts and fill the first partitioned space.

The first coil winding portion may include a first base portion, a first winding body portion protruding downward from a bottom surface of the first base portion and having an outer circumferential surface around which the first coil is wound, and a first covering portion provided at a lower end of the first winding body portion to an outer side of the first winding body portion.

The first coil winding part may further include a mounting groove part provided in a region where the first core member is mounted in the top surface of the first base part and provided to form a step with the top surface of the first base part.

The first coil winding portion may further include a first extension portion provided to extend from the first cover portion and a first step forming protrusion provided to protrude at a first length from a bottom surface of the first extension portion.

The first body part further includes a first coupling pin support part provided at one side of the first coil winding part and provided with one or more first coupling pin members coupled with the first coil, and the insulating molding part may be provided to wrap the first coupling pin support part.

The first body part may further include a first substrate mounting part provided to protrude downward at both side ends of the first connecting pin supporting part and mounted on the substrate.

The first body part further includes a coil attachment hole which is prepared by cutting a part of the first attachment pin support part and a part of the first coil winding part inwardly and attaches the first coil to the first attachment pin member, and the insulating molding part may be prepared to cover the coil attachment hole.

The second coil winding portion may include a second base portion provided to correspond to the first base portion, a second winding body portion provided to correspond to the first winding body portion and provided to protrude downward at a bottom surface of the second base portion and having the second coil wound around an outer circumferential surface thereof, and a second covering portion provided to correspond to the first covering portion and provided to an outer side of the second winding body portion at a lower end of the second winding body portion.

The second coil winding part may further include a mounting boss provided in a region where the first core member is mounted in the top surface of the second base part and provided to form a step with the top surface of the second base part.

The first coil winding portion may further include a first extension portion provided to extend from the first cover portion and a first step forming protrusion provided to protrude at a first length from a bottom surface of the first extension portion; the second coil winding portion may further include a second extension portion provided to correspond to the first extension portion and extended at the second cover portion, and a second step forming protrusion provided to protrude at a bottom surface of the second extension portion by a second length different from the first length.

The second body part further includes a second connection pin supporting part provided at one side of the second coil winding part and provided with one or more second connection pin members, the second connection pin supporting part being connected with the second coil, and the insulation molding part may be provided to wrap the second connection pin supporting part.

The second body portion may further include a second substrate mounting portion that is provided to protrude downward at both side end portions of the second connecting pin supporting portion and is mounted on the substrate.

The width of the core member may be provided to be longer than the width of the first cover portion and the second cover portion.

The first main body part further comprises a 1 st-1 st extension part and a 1 st-2 nd extension part, the 1 st-1 st extension part extends obliquely in the downward direction of the first cover part, and the 1 st-2 nd extension part extends at the end part of the 1 st-1 st extension part; the second main body portion may further include a 2 nd-1 st extension and a 2 nd-2 nd extension, the 2 nd-1 st extension extending obliquely in a downward direction of the second cover portion, the 2 nd-2 nd extension extending at an end of the 2 nd-1 st extension; the second core member may be mounted by straddling the 1 st-1 st and 2 nd-1 st extensions formed at the inclination.

When the first core member and the second core member are mounted on the upper side and the lower side of the first body portion and the second body portion, respectively, the inner faces of the side projections of the first core member and the second core member may be provided to be spaced apart from the second base portion and the second cover portion, respectively, at a predetermined interval.

A bobbin according to an embodiment of the disclosure includes: a first body part including a first coil winding part on which a first coil is wound and which is provided with a core insertion hole inside; a second body part including a second coil winding part on which a second coil is wound and which is provided with a receiving hole inside, the first coil winding part being inserted into the receiving hole and received; and a first partitioned space provided between the first coil wound portion and the second coil wound portion in the accommodation hole.

The first partitioned space may be a partitioned space between boundary surfaces of the first coil winding portion and the second coil winding portion.

The method for manufacturing the transformer device according to one disclosed embodiment comprises the following steps: forming a first body part including a first coil wound part provided with a core insertion hole inside and a first connection pin support part provided at one side of the first coil wound part and provided with one or more first connection pin members; winding a first coil around an outer peripheral surface of the first coil winding portion, and connecting the first coil to the first connection pin member; forming a second body part including a second coil winding part provided with a receiving hole inside thereof, into which the first coil winding part is inserted and received, and a second connection pin support part provided at one side of the second coil winding part and provided with one or more second connection pin members; winding a second coil around an outer circumferential surface of the second coil wound portion, the second coil being connected to the second connecting pin member; disposing the first body portion above the second body portion, inserting the first coil wound portion into the receiving hole, and forming a first spaced space between the first coil wound portion and the second coil wound portion; mounting a first core member on upper sides of the first and second body portions, and mounting a second core member on lower sides of the first and second body portions; and wrapping the first body portion and the second body portion to form an insulating molded portion.

Advantageous effects

According to the disclosed embodiments, a spaced space is formed between the first body part and the second body part, an insulation molding part is formed by injecting an insulation molding liquid into the spaced space between the first body part and the second body part, and since the insulation molding part is provided at each side surface, top surface, bottom surface, and the like of the bobbin, it is possible to secure an insulation distance between the first coil and the core part, an insulation distance between the second coil and the core part, and an insulation distance between the first coil and the second coil. Thus, the transformer device can be miniaturized by shortening the length of the bobbin.

In addition, by providing an insulating mold portion on each side surface, top surface, bottom surface, and the like of the bobbin, heat movement occurs from the first coil and the second coil generating heat to the insulating mold portion and the core member side to diffuse the heat, so that the temperature characteristics of the transformer device can be improved.

Drawings

Fig. 1 is an exploded perspective view illustrating a voltage transformation device according to an embodiment of the present invention.

Fig. 2 is a combined perspective view illustrating a bobbin in a transformer apparatus according to an embodiment of the present invention.

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

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

Fig. 5 is a sectional view illustrating a bobbin in a transformer apparatus according to an embodiment of the present invention.

Fig. 6 is a diagram showing a state when the width of the core member is compared with the width of the first cover portion and the width of the second cover portion according to an embodiment of the present invention.

Fig. 7 is a perspective view illustrating a state where an insulation molding is formed in a voltage transforming apparatus according to an embodiment of the present invention.

Fig. 8 is a bottom perspective view illustrating a state where an insulation molding portion is formed in a transformer apparatus according to an embodiment of the present invention.

Fig. 9 is a diagram illustrating a second partitioned space and a third partitioned space in a transformer apparatus according to an embodiment of the present invention.

Fig. 10 is a diagram illustrating a fourth partitioned space in the pressure conversion apparatus according to an embodiment of the present invention.

Fig. 11 is a perspective view illustrating a bottom surface of a bobbin according to an embodiment of the present invention.

Fig. 12a to 12e are flowcharts illustrating a method of manufacturing a transformer apparatus according to an embodiment of the present invention.

Fig. 13a to 13f are flowcharts illustrating a method of manufacturing a transformer apparatus according to another embodiment of the present invention.

Fig. 14 is a combined perspective view illustrating a bobbin in a transformer apparatus according to another embodiment of the present invention.

Description of the reference numerals

100: transformation device, 101: bobbin, 102: first body portion, 104: second body portion, 106: core member, 106-1: first core member, 106-1 a: first core main body, 106-1 b: first core boss, 106-1 c: first side lobe, 106-2: second core member, 106-2 a: second core main body, 106-2 b: second core boss, 106-2 c: second-side projecting portion, 111: first coil winding portion, 113: first connecting pin support portion, 113 a: first connecting pin support projection, 115: second coil winding portion, 117: second connecting pin support portion, 119: edge partition wall, 121: first base part, 121 a: mounting groove portion, 123: first winding body, 125: first cover portion, 127: first extension, 127 a: first step forming projection, 127-1: 1 st-1 st extension, 127-2: 1 st-2 nd extension, 129: core insertion hole, 131: first connecting pin member, 133: first substrate mounting portion, 135: second substrate mounting portion, 139: second connecting pin member, 141: second base part, 141 a: mounting boss, 143: second winding body, 145: second cover portion, 147: second extension portion, 147 a: second step forming projection, 147-1: 2-1 extension, 147-2: 2 nd-2 nd extension, 149: receiving hole, 150: insulating molding part, 157: coil connecting hole

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the 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, when it is considered that detailed description of related known art of the present invention is possible to obscure the core of the present invention, detailed description thereof will be omitted. 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, or 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 embodiments of the invention 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 "comprise" or "comprise" are used to refer to certain features, numbers, steps, operations, elements, parts or combinations thereof, and they are not to be interpreted as excluding the existence or possibility of one or more other features, numbers, steps, operations, elements, parts or combinations thereof in addition to 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. The components of embodiments of the present invention may be positioned in a variety of orientations and thus 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 should not be 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 present invention.

Fig. 1 is an exploded perspective view showing a transformer apparatus according to an embodiment of the present invention, fig. 2 is a combined perspective view showing a bobbin in a transformer apparatus according to an embodiment of the present invention, fig. 3 is a perspective view showing a bottom surface of the bobbin in a transformer apparatus according to an embodiment of the present invention, fig. 4 is an exploded perspective view showing the bobbin in a transformer apparatus according to an embodiment of the present invention, and fig. 5 is a sectional view showing the bobbin in a transformer apparatus according to an embodiment of the present invention. Here, for convenience of description, a state before the insulating mold is formed in the transformer apparatus 100 is shown.

Referring to fig. 1-5, a transformation device 100 may include a first body portion 102, a second body portion 104, and a core member 106. Core member 106 may include a first core member 106-1 and a second core member 106-2.

In addition, the bobbin 101 may include a first body portion 102 and a second body portion 104. That is, the first and

second body portions

102 and 104 are portions where coils are wound, which may constitute a Bobbin (Bobbin) of the transformer apparatus.

The first coil 50 is wound around the first body portion 102. The first body part 102 may include a first coil winding part 111 and a first connection pin support part 113.

The first coil winding part 111 may be a component for winding the first coil 50 on the first body part 102. The first 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 at one side of the first coupling pin supporting part 113.

The first base part 121 may be provided in a flat plate shape. The region where the first core member 106-1 is mounted in the top surface of the first base part 121 may be provided with a mounting groove part 121 a. The mounting groove portion 121a may be provided to form a step with the top surface of the first base portion 121. For example, the mounting groove part 121a may be provided to be lower than the top surface of the first base part 121 by 0.3mm, but this value is merely exemplary and is not limited thereto.

The bottom surface of the first base part 121 may be provided lower than the bottom surface of the first coupling pin supporter 113. That is, the bottom surface of the first base part 121 may be provided to form a step with the bottom surface of the first coupling pin supporting part 113. Thus, the bottom surface of the first connecting pin support portion 113 is mounted to the top surface of the second body portion 104, 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, the region where the first coil 50 is wound (the bottom surface region of the first base part 121) can be visually recognized by providing the bottom surface of the first base part 121 so as to form a step with the bottom surface of the first connecting pin supporting part 113. Thereby, in the first coil winding part 111, the first coil 50 can be easily wound to the bottom surface area of the first base part 121.

The first winding body 123 may be provided to 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 at 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.

The inside of the first winding main body part 123 may be provided with a core insertion hole 129. A part of the first core member 106-1 and a part of the second core member 106-2 are inserted into the core insertion holes 129, respectively. The core insertion hole 129 may be provided in a height direction (i.e., an up-down direction) of the first body portion 102. Here, the height direction may refer to a Z-axis direction in fig. 1. The core insertion hole 129 may be provided to penetrate the first base part 121. The core insertion hole 129 may be provided along a length direction of the first body portion 102. Here, the length direction may refer to an X-axis direction in fig. 1.

The first cover portion 125 may be provided at a lower end of the first winding body portion 123 toward an 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 downward movement of the first coil 50 wound around the outer peripheral surface of the first winding body portion 123 is restricted by the first covering portion 125, and thus the winding can be performed between the first covering portion 125 and the bottom surface of the first base portion 121.

In an exemplary embodiment, the width of the first base part 121 (i.e., the length in the Y-axis direction in fig. 1) may be provided to be the same as the height between the top surface of the first base part 121 and the bottom surface of the first cover part 125.

The first extending portion 127 may be provided to extend on 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.

The first extension 127 may include a 1 st-1 st extension 127-1 and a 1 st-2 nd extension 127-2. The 1 st-1 extending portion 127-1 may extend downward at both sides of the first cover portion 125. In an exemplary embodiment, the 1 st-1 extending portion 127-1 may extend obliquely in a lower direction at both sides of the first cover portion 125. The 1 st-2 nd extension 127-2 may extend in a horizontal direction at an end of the 1 st-1 st extension 127-1. Here, it is described that the first extending portion 127 extends on both sides of the first covering portion 125, but not limited thereto, and the first extending portion 127 may extend on one side of the first covering portion 125.

The bottom surface of the 1 st-2 nd extension 127-2 may be protrusively provided with a first step forming protrusion 127 a. The first step forming protrusion 127a may be protrudingly provided with a first length. The first step forming protrusion 127a may be provided by a plurality of protrusions spaced apart from each other.

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.

The first connecting pin member 131 may be provided to be bent downward. That is, the first connecting pin member 131 may be provided to be vertically bent downward in a state where the end portion of the first connecting pin member 131 is connected to the first connecting pin supporting protrusion 113 a. In this case, when the coil of the transforming device 100 is wound, interference is not generated between the transforming devices wound around other winding devices.

The first substrate mounting part 133 may be provided to protrude downward at both side end parts of the first connection pin supporting part 113. An end portion of the first substrate mounting part 133 may be mounted on a substrate (not shown). By changing the length of the first substrate mounting part 133, the height of the transforming device 100 mounted on a substrate (not shown) can be adjusted.

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 inwardly from a portion of the first base part 121. The coil connection hole 157 is used to directly connect the first coil 50 wound on the coil winding part 111 with the first connection pin member 131 through the coil connection hole 157. The coil connection hole 157 may be provided to expose the first coil 50 to the outside above the first connection pin support part 113 when the second body part 104 is combined with the first body part 102.

Further, the first body portion 102 may be provided with a peripheral partition wall 119. The edge partition 119 may be provided at a boundary between the first base part 121 and the first connecting pin supporter 113. The 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 first connecting pin supporter 113.

The second coil 60 is wound around the second body portion 104. The inner side of the second body portion 104 may be provided with a receiving hole 149 into which the first coil wound portion 111 of the first body portion 102 is inserted and received. When the first body 102 is lowered in a state where the first body 102 is positioned above the second body 104, the first coil wound portion 111 is inserted into the receiving hole 149, and the first connecting pin support portion 113 is attached to the second body 104.

Wherein the receiving hole 149 may be provided with an area larger than that of the first coil winding part 111. Thus, the first and

second body portions

102 and 104 may be provided with the first separation space S1 therebetween. By forming the first partitioned space S1 between the first body portion 102 and the second body portion 104, the insulating molding liquid can be made to better penetrate into the inside when forming an insulating molded portion described later. The first spaced space S1 may be a spaced space between the boundary surfaces of the first coil winding portion 111 and the second coil winding portion 115.

The second body part 104 may include a second coil winding part 115 and a second connection pin support part 117. The second coil winding part 115 may be a component for winding the second coil 60 on the second body part 104. Each corner portion of the second coil winding portion 115 may be provided in a circular arc shape having a certain curvature. In this case, it is possible to more easily wind than when the second coil 60 is wound on the second coil winding part 115. The second coil winding portion 115 may include a second base portion 141, a second winding 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 surface of the first coupling pin supporting part 113 at the outer side of the first base part 121. The second base part 141 may be provided spaced apart from the first base part 121 outside the first base part 121.

In an exemplary embodiment, the first base part 121 can be provided to be lower than the bottom surface of the first coupling pin support part 113 by a height corresponding to the thickness of the second base part 141. In this case, when the second base part 141 is mounted to the bottom surface of the first connecting pin supporter 113 at the outside of the first base part 121, the second base part 141 may be located at a height corresponding to the first base part 121. That is, the top surface of the second base part 141 may be located on the same plane as the top surface of the first base part 121. In addition, the bottom surface of the second base part 141 may be located on the same plane as the bottom surface of the first base part 121.

The region in the top surface of the second base part 141 where the first core member 106-1 is mounted may be provided with a mounting boss 141 a. The mounting protrusion 141a may be provided to form a step with the top surface of the second base part 141. For example, the mounting boss 141a may be provided higher than the top surface of the second base part 141 by 0.3mm, but this value is merely exemplary and is not limited thereto. The mounting protrusions 141a may be provided to correspond to the mounting groove parts 121 a.

Here, by forming the mounting groove portion 121a on the top surface of the first base portion 121 and the mounting protrusion portion 141a on the top surface of the second base portion 141, when the first coil wound portion 111 is inserted into the receiving hole 149 and the first connecting pin support portion 113 is mounted to the second body portion 104, the top surface of the first base portion 121 and the top surface of the second base portion 141 may be located on the same plane.

The second winding body 143 may protrude downward from the bottom surface of the second base 141. The second coil 60 may be wound on the outer circumferential surface of the second winding body part 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.

The inner side of the second winding body portion 143 may be provided with a receiving hole 149 into which the first coil winding portion 111 is inserted and received. The accommodation hole 149 may be provided in the height direction of the second body portion 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 first body 102 is disposed above the second body 104 and then the first body 102 is moved downward, the first coil wound portion 111 is inserted into and accommodated in the accommodation hole 149. In this case, the first coil winding portion 111 has a shape surrounded by the second winding body portion 143. Thereby, the second body portion 104 can protect the first coil 50 from the external environment. At this time, the first coil winding part 111 may be spaced apart from the second winding body part 143 by a predetermined interval.

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 in parallel with the second base portion 141. That is, the second covering portion 145 may be provided in a plate shape extending horizontally to the outside of the second winding body 143 at the lower end of the second winding body 143.

Since the second covering portion 145 is provided at the lower end of the second winding body portion 143 to 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 coil can be wound between the second covering portion 145 and the bottom surface of the second base portion 141.

When the first coil wound section 111 is inserted into the accommodation hole 149 such that the first connecting pin support section 113 is mounted on the top surface of the second body section 104, the second cover section 145 may be provided corresponding to the first cover section 125 at both sides in the width direction of the first cover section 125. That is, the top surface of the second cover portion 145 may be located on the same plane (at the same height) as the top surface of the first cover portion 125. The bottom surface of the second cover portion 145 may be located on the same plane (at the same height) as the bottom surface of the first cover portion 125. At this time, the second cover portion 145 may be provided to be spaced apart from the first cover portion 125 by a predetermined interval.

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 extend obliquely in a lower direction at both sides of the second cover portion 145. The 2 nd-2 nd extension 147-2 may extend in a horizontal direction at an end of the 2 nd-1 nd extension 147-1. Here, it is described that the second extending portion 147 extends on both sides of the second cover portion 145, but not limited thereto, and the second extending portion 147 may extend on one side of the second cover portion 145.

The bottom surface of the 2 nd-2 nd extension 147-2 may be protrusively provided with a second step forming protrusion 147 a. The second step forming protrusion 147a may be protrudingly provided at a second length different from the first length. In an exemplary embodiment, the second length may be shorter than the first length. That is, the second step forming protrusion 147a can be provided with a length shorter than that of the first step forming protrusion 127 a. The second step forming protrusion 147a may be provided by a plurality of protrusions spaced apart from each other.

Among them, since the first step forming protrusion 127a and the second step forming protrusion 147a are formed in different lengths from each other, the first body portion 102 and the second body portion 104 may have different heights from each other when the bobbin 101 is mounted to a molding die for forming an insulating molded portion, which will be described later. That is, when the bobbin 101 is mounted to the molding die, the first and

second body portions

102 and 104 may have a difference in height (i.e., a step) corresponding to a difference in length of the first and second

step forming protrusions

127a and 147 a. In this case, the insulating molding liquid can be more favorably infiltrated into the inside when forming an insulating molded portion described later.

When the first coil wound section 111 is inserted into the receiving hole 149 such that the first connecting pin support section 113 is mounted on the top surface of the second body section 104, the second extension section 147 may be provided outside the first extension section 127 in correspondence with the first extension section 127. That is, the second extension 147 may be provided to be located at the same height as the first extension 127. The 2 nd-1 st extension 147-1 may be provided to correspond to the 1 st-1 st extension 127-1 and the 2 nd-2 nd extension 147-2 may be provided to correspond to the 1 st-2 nd extension 127-2. At this time, the second extension portion 147 may be provided to be spaced apart from the first extension portion 127 by a predetermined interval.

As described above, by inserting the first coil wound part 111 of the first body part 102 into the receiving hole 149 of the second body part 104 and being received, and the heights of the first and second coil wound

parts

111 and 115 are the same (i.e., the top and bottom surfaces of the first coil wound part 111 and the top and bottom surfaces of the second coil wound part 115 are located on the same plane, respectively), the thickness of the transformer apparatus 100 may be minimized.

The second connection pin supporting part 117 may be provided at one side of the second coil winding part 115. The second connecting pin support part 117 may be provided in an opposite direction to the first connecting pin support part 113. The second connecting pin support 117 may be provided to protrude upward on one side of the second base part 141. That is, the second connecting pin support 117 may be provided at a height higher than the top surface of the second base part 141.

When the first coil wound part 111 is inserted into the receiving hole 149 such that the first connecting pin support part 113 is mounted on the top surface of the second body part 104, the height of the second connecting pin support part 117 may be provided corresponding to the height of the edge partition 119. The end of the second connecting pin support part 117 may be provided with one or more second connecting pin parts 139 connected with the second coil 60.

The second connecting pin member 139 may be provided to be bent downward. That is, the second connecting pin member 139 may be provided to be bent vertically downward when the end portion of the second connecting pin member 139 is connected to the second connecting pin support portion 117. In this case, when the coil of the transforming device 100 is wound, interference is not generated between the transforming devices wound around other winding devices.

The second substrate mounting part 135 may be provided to protrude downward at both side ends of the second connecting pin supporting part 117. An end of the second substrate mounting part 135 may be mounted on a substrate (not shown). The height of the voltage transforming device 100 mounted on the substrate (not shown) may be adjusted by changing the length of the second substrate mounting part 135.

The core member 106 serves as a magnetic core of the transformer apparatus 100. Core piece 106 may include a first core piece 106-1 and a second core piece 106-2. The first core piece 106-1 may be mounted on the upper side of the first and

second body portions

102, 104 and the second core piece 106-2 may be mounted on the lower side of the first and

second body portions

102, 104.

The first core piece 106-1 may include a first core body 106-1a, a first core projection 106-1b, and a first side projection 106-1 c. The first core body 106-1a may be provided in a flat plate shape. The first core body 106-1a may be mounted on the upper sides of the first and

second body portions

102 and 104.

The first core protrusion 106-1b may be provided to protrude downward from the bottom surface of the first core main body 106-1 a. The first core protrusion 106-1b may be provided to correspond to the core insertion hole 129. The first core protrusion 106-1b may be inserted into the core insertion hole 129.

The first side projection 106-1c may protrude downward at both sides of the first core main body 106-1 a. When the first core main body 106-1a is mounted on the upper sides of the first and second

main body portions

102 and 104, the first side projection portions 106-1c may be provided to cover both sides of the second main body portion 104.

The second core component 106-2 may include a second core body 106-2a, a second core boss 106-2b, and a second side boss 106-2 c. The second core body 106-2a may be provided in a flat plate shape. The second core body 106-2a may be mounted to the underside of the first and

second body portions

102 and 104.

The second core raised part 106-2b may be provided to protrude upward from the top surface of the second core main body 106-2 a. The second core boss 106-2b may be provided to correspond to the core insertion hole 129. The second core boss 106-2b may be inserted into the core insertion hole 129.

The second side projections 106-2c may protrude upward on both sides of the second core main body 106-2 a. The second side projection portions 106-2c may be provided to cover both sides of the second main body portion 104 when the second core main body 106-2a is mounted to the lower sides of the first and second

main body portions

102 and 104.

In another aspect, core member 106 may be provided having a width greater than the width of first cover portion 125 and second cover portion 145. For example, as shown in FIG. 6, width W2 of second core component 106-2 may be provided to be greater than width W1 of first cover portion 125 and second cover portion 145.

At this time, when the second core member 106-2 is mounted on the lower sides of the first and

second body portions

102 and 104, the second core member 106-2 rides over the obliquely formed 1 st-1 st and 2 nd extensions 127-1 and 147-1, and thus a separate space is formed between the second core member 106-2 and the bottom surfaces of the first and

second cover portions

125 and 145. In this case, when forming an insulating molded portion described later, the insulating molding liquid can better penetrate into the inside through the partitioned space.

In addition, when the first core member 106-1 and the second core member 106-2 are mounted on the upper and lower sides of the first body portion 102 and the second body portion 104, respectively, the inner faces of the first side projection 106-1c and the second side projection 106-2c may be spaced apart from the second base portion 141 and the second cover portion 145, respectively, by a predetermined interval. In this case, when forming an insulating molded portion described later, the insulating molding liquid can better penetrate into the inside through the partitioned space.

Here, it is described that the first core member 106-1 and the second core member 106-2 are provided in an EE shape so that a part thereof is inserted into the core insertion hole 129, respectively, but not limited thereto, and various shapes of core members such as an EI shape, an EVD shape, an EED shape, an EP shape, and an EEH shape may be used for the first core member 106-1 and the second core member 106-2 in addition thereto. Depending on the shape of the core member 106, a part of at least one of the first core member 106-1 and the second core member 106-2 may be inserted into the core insertion hole 129.

In addition, the transformer apparatus 100 may further include an insulation molding part for securing an insulation distance between the first coil 50 and the core part 106, an insulation distance between the second coil 60 and the core part 106, and an insulation distance between the first coil 50 and the second coil 60.

Fig. 7 is a perspective view showing a state of formation of an insulation molding portion in a transformer apparatus according to an embodiment of the present invention, and fig. 8 is a bottom perspective view showing a state of formation of an insulation molding portion in a transformer apparatus according to an embodiment of the present invention.

Referring to fig. 7 to 8, the transforming device 100 may include an insulating molding part 150. The insulating mold section 150 may be provided by molding when the first core member 106-1 is mounted on the upper sides of the first and

second body sections

102 and 104 and the second core member 106-2 is mounted on the lower sides of the first and

second body sections

102 and 104.

The insulating molding part 150 may be made of an insulating material. Thus, the insulating mold 150 can ensure the insulating distance between the first coil 50 and the core member 106, the insulating distance between the second coil 60 and the core member 106, and the insulating distance between the first coil 50 and the second coil 60. Since each insulation distance is secured by the insulation molding part 150, miniaturization of the transforming device 100 can be achieved by shortening the length of the bobbin 101.

The insulating mold 150 may be equipped by a molding process (e.g., injection molding, etc.). For example, the insulating mold part 150 may be formed by an insert injection process of injecting an insulating molding liquid into a prefabricated mold, but is not limited thereto. The insulating molding part 150 may be provided to wrap the first and

second body parts

102 and 104.

Specifically, the insulating mold 150 may be provided to cover each side of the bobbin 101. Since the second body portion 104 is located outside the first body portion 102, the second coil 60 wound on the second body portion 104 is exposed to the outside. At this time, the insulating mold 150 may be provided to wrap each side of the bobbin 101 to prevent the second coil 60 from being exposed to the outside.

In addition, the insulating mold part 150 may be provided to fill the partitioned space between the first and

second body parts

102 and 104. That is, the insulating molding liquid is injected into the partitioned space between the first body portion 102 and the second body portion 104, thereby filling the partitioned space between the first body portion 102 and the second body portion 104. In this case, the insulating mold 150 may be provided to wrap each side of the first coil winding part 111. At this time, the insulating mold 150 may be provided to wrap the first coil 50 outside the first coil 50 wound around the first coil winding part 111.

In addition, the insulating mold parts 150 may be provided on the top and bottom surfaces of the bobbin 101, respectively. The insulating mold 150 may be provided to cover the first and

second base parts

121 and 141 on the top surface of the bobbin 101. The insulating mold part 150 may be provided at a lower height than the edge partition 119 and the second connecting pin support part 117. In addition, the insulating mold 150 may be provided lower than the height of the first core member 106-1. The height at this time may be a height based on the direction opposite to (above) the gravity.

In addition, the insulating mold part 150 may be provided on the first connecting pin support part 113 at the top surface of the bobbin 101. At this time, the insulating mold part 150 may be provided lower than the height of the first coupling pin support protrusion 113a and the edge partition 119. The insulating mold 150 may be provided to cover the coil connection hole 157. Accordingly, the first coil 50 drawn out through the coil connection hole 157 and connected to the first connection pin member 131 is not exposed to the outside by the insulating mold 150.

The insulating mold part 150 may be provided to wrap one end of the first connecting pin member 131 connected to the first connecting pin support part 113. In addition, the insulating mold part 150 may be provided to wrap one end of the second connecting pin member 139 connected to the second connecting pin support part 117.

In addition, the insulating mold 150 may be provided to cover the first cover portion 125 and the second cover portion 145 on the bottom surface of the bobbin 101. The insulating mold 150 may be provided to cover the first and second extending

portions

127 and 147 at the bottom surface of the bobbin 101. The insulating molding portion 150 can be provided at a lower height than the second core member 106-2. The insulating mold 150 can be provided at a lower height than the first step forming protrusion 127a and the second step forming protrusion 147 a. The height at this time may be a height based on the direction of gravity (downward).

As described above, since the spaced space is formed between the first body part 102 and the second body part 104, and the insulation molding part 150 is formed by injecting the insulation molding liquid into the spaced space between the first body part 102 and the second body part 104, and the insulation molding part 150 is provided at each side surface, the top surface, the bottom surface, and the like of the bobbin 101, it is possible to secure the insulation distance between the first coil 50 and the core member 106, the insulation distance between the second coil 60 and the core member 106, and the insulation distance between the first coil 50 and the second coil 60.

In addition, by providing the insulating mold part 150 on each side surface, top surface, bottom surface, and the like of the bobbin 101, heat movement occurs from the first coil 50 and the second coil 60 generating heat to the insulating mold part 150 and the core member 106 side to diffuse the heat, so that the temperature characteristics of the transformer apparatus 100 can be improved. When the insulating mold 150 was used, the temperature of the transformer apparatus 100 was 72.8 ℃ in the state where the insulating mold 150 was not present, but the temperature of the transformer apparatus 100 was decreased by 4.7 ℃ to 68.1 ℃ in the state where the insulating mold 150 was formed, as compared with the case where the insulating mold 150 was not present.

On the other hand, in the disclosed embodiment, the insulating mold section 150 is formed by injecting an insulating molding liquid into a prefabricated mold in a state where the first core member 106-1 is mounted on the upper sides of the first and

second body sections

102 and 104. At this time, the insulating molding liquid may be easily injected through various structures (e.g., partitioned spaces) formed in the voltage transformation device 100.

First, the first separated space S1 is formed between the first body part 102 and the second body part 104, and the insulating mold part 150 can be formed between the first body part 102 and the second body part 104 by allowing the insulating mold liquid to permeate into the first separated space S1.

Second, by forming the first step forming protrusion 127a and the second step forming protrusion 147a in different lengths, the first body portion 102 and the second body portion 104 may have different heights (i.e., steps) from each other when the bobbin 101 is mounted in a molding die for forming the insulating molded part 150. In this case, as shown in fig. 9, a second partitioned space S2 is provided between the first core member 106-1 and the top surface of the second base portion 141, and a third partitioned space S3 is formed between the second core member 106-2 and the bottom surfaces of the first cover portion 125 and the second cover portion 145. At this time, the insulating molding liquid penetrates into the second partitioned space S2 and the third partitioned space S3 to form the insulating molded part 150. At this time, the widths of the first core member 106-1 and the second core member 106-2 may be provided to correspond to the widths of the first cover portion 125 and the second cover portion 145.

Third, when the first core member 106-1 and the second core member 106-2 are mounted on the upper side and the lower side of the first body portion 102 and the second body portion 104, respectively, the inner faces of the first side projection 106-1c and the second side projection 106-2c are spaced apart from the second base portion 141 and the second cover portion 145 of the second body portion 104 at a predetermined interval, respectively, so that a fourth spaced-apart space S4 is formed between the first side projection 106-1c and the second base portion 141 and between the second side projection 106-2c and the second cover portion 145, as shown in fig. 10. In this case, the insulating molding liquid penetrates into the fourth partitioned space S4 to form the insulating molded part 150.

On the other hand, as shown in FIG. 6, when core member 106 is provided with a width longer than the widths of first cover portion 125 and second cover portion 145, second core member 106-2 spans the portion where 1-1 extension 127-1 and 2-1 extension 147-1 are inclined when second core member 106-2 is mounted on the underside of first body portion 102 and second body portion 104. In this case, a separate space is formed between the second core member 106-2 and the bottom surfaces of the first cover portion 125 and the second cover portion 145, and thus the insulating molding liquid penetrates into the separate space to form the insulating molding portion 150.

Referring to fig. 11, each corner portion of the second coil wound part 115 may be formed in a circular arc shape having a certain curvature. In addition, the first connecting pin member 131 and the second connecting pin member 139 may be provided to be bent vertically. Thus, when winding the coil of the transformer apparatus 100, interference between transformer apparatuses wound around other winding apparatuses is not generated. In addition, by securing a winding rotation radius for winding the second coil 60 inside the bobbin 101, it is possible to easily wind the second coil 60 at once.

Referring to fig. 12a to 12e, a first body part 102 is formed, and the first coil 50 is wound on a first coil winding part 111, the first body part 102 including the first coil winding part 111 and a first connection pin support part 113 (fig. 12 a). At this time, the first coil 50 is exposed to the outside through the coil connection hole 157, and thus may be connected to the first connection pin member 131.

Then, a second body part 104 is formed, and the second coil 60 is wound on a second coil wound part 115, the second body part 104 including the second coil wound part 115 and a second connecting pin support part 117 (fig. 12 b). At this time, the second coil 60 may be connected to the second connection pin member 139.

Then, the first body portion 102 is disposed above the second body portion 104, and the first coil winding portion 111 is inserted into the accommodating hole 149 of the second body portion 104 (fig. 12 c). At this time, when the first connecting pin supporting part 113 is mounted to the second body part 104, a first spaced space S1 exists between the first coil wound part 111 and the second coil wound part 115.

Then, the first core component 106-1 is mounted on the upper side of the first and

second body parts

102, 104 and the second core component 106-2 is mounted on the lower side of the first and second body parts 102, 104 (fig. 12 d).

Then, the first body portion 102 and the second body portion 104 are placed in a molding die (not shown) and then an insulating molding liquid is injected, thereby wrapping the first body portion 102 and the second body portion 104 to form an insulating molded portion 150 (fig. 12 e). At this time, the first body portion 102, the second body portion 104, and the core member 106 are bonded by the insulating mold portion 150.

Referring to fig. 13a to 13f, a first body part 102 is formed, and the first coil 50 is wound on the first coil wound part 111, the first body part 102 including the first coil wound part 111 and a first connection pin support part 113 (fig. 13 a). At this time, the first coil 50 is exposed to the outside through the coil connection hole 157, and thus may be connected to the first connection pin member 131.

Then, the first body portion 102 is included to form a first insulating molding 150-1 (fig. 13 b). The first insulating mold 150-1 may be formed through a molding process. The first insulating mold part 150-1 may be formed at each side, top, and bottom surfaces of the first coil winding part 111. At this time, the first insulating mold 150-1 may be provided to include the first coil 50 at an outer side of the first coil 50.

In addition, the first insulation molding part 150-1 may be formed on the top and bottom surfaces of the first connecting pin support part 113. At this time, the first insulating mold 150-1 may be provided to cover the coil connection hole 157. The first insulating mold 150-1 can be provided at a lower height than the first connecting pin support protrusion 113a and the edge partition 119.

Then, a second body part 104 is formed, and the second coil 60 is wound on a second coil wound part 115, the second body part 104 including the second coil wound part 115 and a second connection pin support part 117 (fig. 13 c). At this time, the second coil 60 may be connected to the second connection pin member 139.

Then, the second body portion 104 is included to form a second insulating molding 150-2 (fig. 13 d). The second insulating mold 150-2 may be formed through a molding process. The second insulating mold part 150-2 may be formed at each side, top, and bottom surfaces of the second coil winding part 115. At this time, the second insulating mold 150-2 may be provided to include the second coil 60 at an outer side of the second coil 60. In addition, the second insulating mold part 150-2 may be formed at the top and bottom surfaces of the second connecting pin support part 117.

Then, the first body part 102 formed with the first insulating mold part 150-1 is disposed above the second body part 104 formed with the second insulating mold part 150-2, and the first coil wound part 111 is inserted into the receiving hole 149 of the second body part 104 (fig. 13 e).

Then, the first core member 106-1 is mounted on the upper side of the first and

second body portions

102, 104, and the second core member 106-2 is mounted on the lower side of the first and second body portions 102, 104 (fig. 13 f).

On the other hand, the transformer apparatus 100 can be manufactured by various manufacturing methods other than the above. For example, after preparing the first body 102 around which the first coil 50 is wound and forming the insulating mold 150 on the second body 104 around which the second coil 60 is wound, the first coil wound part 111 is inserted into the receiving hole 149 such that the first body 102 and the second body 104 are disposed at the same height, whereby the insulating mold 150 can be formed on the top and bottom surfaces of the first body 102 and the second body 104.

In addition, after the insulating mold 150 is formed at the first body part 102 around which the first coil 50 is wound and the first coil wound part 111 is inserted into the receiving hole 149 such that the first and

second body parts

102 and 104 are arranged at the same position, an insulating member (e.g., an insulating tape) is attached such that one end thereof forming the first connecting pin support part 113 in the bobbin 101 covers the second bobbin 60, thereby enabling the insulating mold 150 to be formed at the top and bottom surfaces of the first and

second body parts

102 and 104.

When the insulating mold 150 is formed on the outer surfaces of the first and

second body portions

102 and 104, the first and

second body portions

102 and 104 can be fixedly coupled by the insulating mold 150.

Fig. 14 is a combined perspective view illustrating a bobbin in a transformer apparatus according to another embodiment of the present invention. Here, the focus will be described with respect to a portion having a large difference from the embodiment shown in fig. 1 to 5.

Referring to fig. 14, in the case where there is no additional partitioned space between the first and

second body portions

102 and 104, the voltage transforming devices 100 may be equipped by contacting each other. That is, the receiving hole 149 formed in the second body part 104 is provided to correspond to the area of the first coil winding part 111, and thus may be provided by contacting each other without a separate space between boundary surfaces of the first coil winding part 111 and the second coil winding part 115. At this time, the insulating molding liquid may permeate through other partitioned spaces (e.g., S2, S3, S4, etc.), thereby forming the insulating molding part 150.

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

Claims

1. A voltage transformation device, comprising:

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

a second body part including a second coil winding part on which a second coil is wound and which is provided with a receiving hole inside thereof, the first coil winding part being inserted into the receiving hole and received;

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

one or more spaced-apart spaces for infiltration of an insulating molding liquid into the interior of the transformer apparatus.

2. The transforming device of claim 1,

the first main body part and the second main body part form a bobbin of the transformer device,

the partitioned space includes at least one of a first partitioned space formed between the first and second body portions and a second partitioned space formed between the spool and the core member.

3. The transformation device according to claim 2, further comprising an insulating molding,

the insulating molding part is provided to wrap the first and second body parts and fill the first partitioned space.

4. The transformation device according to claim 3, wherein the first coil winding portion includes;

a first base part;

a first winding body portion that is provided so as to protrude downward from a bottom surface of the first base portion and has an outer peripheral surface around which the first coil is wound; and

and a first cover portion provided at a lower end of the first wound body portion to an outside of the first wound body portion.

5. The transformation device according to claim 4, wherein the first coil winding portion further includes a mounting groove portion,

the mounting groove portion is provided in a region where the first core member is mounted in the top surface of the first base portion, and is provided to form a step with the top surface of the first base portion.

6. The transformation device according to claim 4, wherein the first coil winding further comprises;

a first extending portion provided to extend from the first cover portion; and

the first step forms a protrusion which is protrudingly provided at a first length on a bottom surface of the first extension portion.

7. The transformation device according to claim 4, wherein the first body portion further includes a first connecting pin support portion,

the first coupling pin supporting part is provided at one side of the first coil winding part and is provided with one or more first coupling pin members connected with the first coil,

the insulating molding part is provided to wrap the first connecting pin support part.

8. The transformation device according to claim 7, wherein the first body portion further includes a first substrate mounting portion,

the first substrate mounting part is provided to protrude downward at both side ends of the first connecting pin supporting part and mounted on the substrate.

9. The transformation device of claim 7, wherein the first body portion further comprises a coil attachment hole,

the coil attachment hole is prepared by cutting a part of the first attachment pin support portion and a part of the first coil winding portion to the inside, and attaches the first coil to the first attachment pin member,

the insulating mold is provided to cover the coil attachment hole.

10. The transformation device according to claim 4, wherein the second coil wound portion includes;

a second base part provided to correspond to the first base part;

a second winding body part which is provided to correspond to the first winding body part, protrudes downward from the bottom surface of the second base part, and has the second coil wound around the outer peripheral surface thereof; and

a second cover portion provided to correspond to the first cover portion and provided at a lower end of the second winding body portion toward an outer side of the second winding body portion.

11. The transformation device of claim 10, wherein the second coil winding portion further comprises a mounting boss,

the mounting boss portion is provided in a region where the first core member is mounted in a top surface of the second base portion, and is provided to form a step with the top surface of the second base portion.

12. The transformation device according to claim 10, wherein the first coil-wound portion further includes a first extension and a first step-forming protrusion,

the first extension portion is provided extending from the first cover portion, and the first step forming projection is provided projecting by a first length from a bottom surface of the first extension portion;

the second coil winding portion further includes a second extension portion provided to correspond to the first extension portion and extended at the second cover portion, and a second step forming protrusion provided to protrude at a bottom surface of the second extension portion by a second length different from the first length.

13. The transformation device according to claim 10, wherein the second body portion further includes a second connecting pin support portion,

the second connection pin support part is provided at one side of the second coil winding part and is provided with one or more second connection pin members, the second connection pin support part being connected with the second coil,

the insulating molding part is provided to wrap the second connecting pin support part.

14. The transformation device according to claim 13, wherein the second body portion further includes a second substrate mounting portion,

the second substrate mounting part is provided at both side ends of the second connecting pin supporting part to protrude downward and mounted on the substrate.

15. The transforming device of claim 10,

the width of the core member is provided to be longer than the width of the first cover portion and the second cover portion.

16. The transformation device of claim 10,

the first main body part further comprises a 1 st-1 st extension part and a 1 st-2 nd extension part, the 1 st-1 st extension part extends obliquely in the downward direction of the first cover part, and the 1 st-2 nd extension part extends at the end part of the 1 st-1 st extension part;

the second main body part further comprises a 2-1 extending part and a 2-2 extending part, the 2-1 extending part extends obliquely in the downward direction of the second cover part, and the 2-2 extending part extends at the end of the 2-1 extending part;

the second core member is mounted by straddling the 1 st-1 st extension and the 2 nd-1 st extension formed at the inclination.

17. The transforming device of claim 10,

when the first core member and the second core member are mounted on the upper side and the lower side of the first main body portion and the second main body portion, respectively, the inner faces of the side raised portions of the first core member and the second core member are provided to be spaced apart from the second base portion and the second cover portion, respectively, at a predetermined interval.

18. A spool, characterized in that it comprises:

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

a second body part including a second coil winding part on which a second coil is wound and which is provided with a receiving hole inside, the first coil winding part being inserted into the receiving hole and received; and

a first partitioned space provided between the first coil wound portion and the second coil wound portion in the accommodation hole.

19. The spool as defined in claim 18,

the first partitioned space is a partitioned space between boundary surfaces of the first coil winding portion and the second coil winding portion.