KR20220129384A - Bobbin and transformer with the same - Google Patents

Abstract

Disclosed are a bobbin and a transformer device including the same. In one embodiment of the present disclosure, the transformer device includes: a bobbin including a first body part including a coil winding part on which a first coil is wound and which has a core insertion hole provided therein, and a second body part on which a second coil is wound, which has a housing hole in which the coil winding part is inserted and housed, and which is combined vertically with the first body part on the outside of the first body part; a core member including a first core member seated on upper sides of the first body part and the second body part and a second core member seated on lower sides of the first body part and the second body part, wherein at least one of the first core member and the second core member is partially inserted into the core insertion hole; and an insulation molding part provided on the outside of the bobbin. Therefore, the present invention is capable of securing an insulation distance between the first and second coils.

Description

Bobbin and transformer including same

Embodiments of the present invention relate to bobbins and transformers.

A transformer is a device that converts an electric voltage into a voltage required by a corresponding electric product. Recently, as the trend of miniaturization and thinning of electronic devices including displays is a trend, transformer devices mounted on such electronic devices are also being miniaturized and thinned.

Korean Patent Publication No. 10-2008-0031481 (2008.04.08)

An embodiment of the present invention is to provide a bobbin and a transformer capable of miniaturization.

A transformer according to an embodiment of the present disclosure includes a first body portion including a coil winding portion in which a first coil is wound and a core insertion hole is provided therein, and a second coil wound therein, and the coil winding portion is inserted therein to accommodate a bobbin having an accommodating hole and including a second body portion coupled to the first body portion from the outside of the first body portion; a first core member seated on upper sides of the first body portion and the second body portion, and a second core member seated on lower sides of the first body portion and the second body portion, wherein the first core member and the At least one of the second core members may include a core member, a part of which is inserted into the core insertion hole; and an insulating molding part provided on the outside of the bobbin.

The insulation molding part is provided to secure 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 can be

When the coil winding part is inserted into the accommodation hole, upper and lower surfaces of the coil winding part may be provided at the same height as the upper surface and the lower surface of the second body part, respectively.

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, and the second body The unit may further include a second connecting pin member to which the second coil is connected, and a second connecting pin supporting unit provided on the opposite side of the first connecting pin supporting unit in the second body portion and supporting the second connecting pin member. can

The coil winding portion may include: a first base portion having one side connected to the first connecting pin support portion; a first winding body portion provided under the first base portion and on which the first coil is wound on the outside; and a first cover part provided outside the first winding body part in the first winding body part and restricting a lower movement of the first coil.

The second body portion may include a second base portion provided at a height corresponding to the first base portion from the outside of the first base portion, and an upper surface of one side of which is seated on a lower surface of the first connecting pin support portion; a second winding body portion provided under the second base portion, the second coil wound on the outside, and the accommodating hole provided on the inside; and a second cover portion provided outside the second winding body portion in the second winding body portion and restricting a lower movement of the second coil.

A width of a portion seated on a lower surface of the first connecting pin support portion of the second base portion may be provided to be less than or equal to a width of the first connecting pin support portion.

The insulating molding part may be provided to surround each side surface of the bobbin so that the second coil is not exposed to the outside.

The insulating molding part may be provided in a shape that a part protrudes to the outside of the bobbin so that the transformer is mounted on the substrate.

The bobbin is provided at a boundary between the first base part and the first connection pin support part, and is provided to protrude along an edge of an end of the first connection pin support part facing the first base part. may further include.

The insulating molding part may be provided between an uppermost end and a lowermost end of the transformer.

The insulating molding part may be provided on upper surfaces of the first base part and the second base part, and may be provided at a height equal to or less than a height of the first edge partition wall or the first core member.

The bobbin may include: an extended seating part connected to the other side of the first base part and having an upper surface of the other side of the second base part seated on a lower surface thereof; and a second edge barrier rib provided at a boundary between the first base part and the extended seating part.

The insulating molding part may be provided on the extended seating part on the upper surface of the bobbin, and may be provided to be less than or equal to a height of the second edge partition wall.

The insulating molding part may be provided to surround one end of the second connection pin member connected to the second connection pin support part.

The bobbin is provided on the first body portion, a portion of the first connecting pin support portion and the coil winding portion is cut inwardly so that the first coil is exposed to the outside, and the first coil is connected to the first connecting pin It may further include a coil connection hole for being connected to the member.

The insulating molding part may be provided on the first connection pin support part on the upper surface of the bobbin, and may be provided to cover the coil connection hole.

The insulating molding part may be provided to surround one end of the first connection pin member connected to the first connection pin support part.

The bobbin may include a first insulating member provided to cover the second coil at one end of the bobbin, a second insulating member provided to cover the second coil at one side in a longitudinal direction of the bobbin, and the bobbin It may further include one or more of the third insulating member provided to cover the second coil at the other side of the longitudinal direction.

A bobbin according to an embodiment of the present disclosure includes: a first body portion including a coil winding portion in which a first coil is wound and a core insertion hole is provided therein; a second body part having a receiving hole in which a second coil is wound and the coil winding part is inserted and accommodated therein, and coupled to the first body part from the outside of the first body part; and an insulating molding part provided on the outside of the bobbin and securing an insulating distance between the first coil and the second coil.

According to the disclosed embodiment, the coil winding portion of the first body portion is inserted and received in the receiving hole of the second body portion, and the height of the coil winding portion and the second body portion is provided to be the same, thereby minimizing the thickness of the transformer while minimizing the thickness of the coil. It is possible to secure the winding area.

In addition, by forming the first insulating member at one end of the bobbin at which the first connecting pin support part is formed, an insulating distance between the first coil and the second coil can be secured, thereby reducing the length of the bobbin and miniaturizing the transformer. be able to do

In addition, by attaching the second insulating member and the third insulating member to both sides of the bobbin, it is possible to simultaneously secure the insulating distance between the first coil and the core member and the insulating distance between the second coil and the core member while maintaining the winding area. . In addition, the insulation distance between the first coil and the second coil can be secured.

In addition, by forming insulating molding parts on each side, upper surface, and lower surface of the bobbin, the insulation distance between the first coil and the core member, the insulation distance between the second coil and the core member, and the insulation distance between the first coil and the second coil It is possible to improve the temperature characteristics of the transformer while securing it.

In addition, by attaching the first to third insulating members to the bobbin and forming insulating molding parts on each side, upper surface, and lower surface of the bobbin, the insulation distance between the first coil core member and the insulation between the second coil and the core member The distance and the insulation distance between the first coil and the second coil can be double secured.

1 is a combined perspective view of a transformer according to an embodiment of the present invention;
2 is an exploded perspective view of a transformer according to an embodiment of the present invention;
3 is a perspective view illustrating a bobbin in a transformer according to an embodiment of the present invention;
4 is a cross-sectional view showing a bobbin in a transformer according to an embodiment of the present invention;
5 is an exploded perspective view illustrating a bottom surface of a bobbin in a transformer according to an embodiment of the present invention;
6 is a view showing a state before an insulating member is attached in the transformer according to an embodiment of the present invention;
7 is a view illustrating a state in which an insulating member is attached in a transformer according to an embodiment of the present invention;
8 is a plan view showing a first body portion and a second body portion in an embodiment disclosed;
9 is a perspective view showing a state before the transformer according to an embodiment of the present invention is seated on a substrate;
10 is a perspective view illustrating a state in which a transformer according to an embodiment of the present invention is seated on a substrate;
11 is a plan view showing a transformer according to another embodiment of the present invention;
12 is a cross-sectional view showing a section in the II' direction in the transformer according to another embodiment of the present invention;

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following detailed description is provided to provide a comprehensive understanding of the methods, apparatus, and/or systems described herein. However, this is merely an example and the present invention is not limited thereto.

In describing the embodiments of the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. And, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification. The terminology used in the detailed description is for the purpose of describing embodiments of the present invention only, and should in no way be limiting. Unless explicitly used otherwise, expressions in the singular include the meaning of the plural. In this description, expressions such as “comprising” or “comprising” are intended to indicate certain features, numbers, steps, acts, elements, some or a combination thereof, one or more other than those described. It should not be construed to exclude the presence or possibility of other features, numbers, steps, acts, elements, or any part or combination thereof.

On the other hand, directional terms such as upper side, lower side, one side, the other side, etc. are used in connection with the orientation of the disclosed drawings. Since components of embodiments of the present invention can be positioned in various orientations, the directional terminology is used for purposes of illustration and not limitation.

Also, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The above terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

1 is a combined perspective view of a transformer according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the transformer according to an embodiment of the present invention, and FIG. A perspective view showing the bobbin, FIG. 4 is a cross-sectional view showing the bobbin in the transformer according to an embodiment of the present invention, and FIG. 5 is an exploded perspective view showing the bottom of the bobbin in the transformer according to the embodiment of the present invention.

1 to 5 , the transformer 100 may include a first body portion 102 , a second body portion 104 , a bobbin fixing 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 . Here, the first body portion 102 and the second body portion 104 may constitute a bobbin as a coil wound portion.

A first coil 50 is wound around the first body portion 102 . The first body portion 102 may include a coil winding portion 111 , a first connecting pin support portion 113 , and an extended seating portion 115 .

The coil winding unit 111 may be configured to wind the first coil 50 on the first body unit 102 . The coil winding part 111 may include a first base part 121 , a first winding body part 123 , a first cover part 125 , and a first extension part 127 .

The first base part 121 may be provided by connecting the first connection pin support part 113 and the extended seating part 115 between the first connection pin support part 113 and the extended seating part 115 . The first base part 121 may be provided in parallel with the first connecting pin support part 113 and the extended seating part 115 . The first base part 121 may be provided in the form of a flat plate.

The lower surface of the first base part 121 may be provided lower than the lower surfaces of the first connecting pin support part 113 and the extended seating part 115 . That is, the lower surface of the first base part 121 may be provided to have a step difference with the lower surfaces of the first connecting pin support part 113 and the extended seating part 115 . Accordingly, while the upper surface of the second body portion 104 is seated on the lower surface of the first connecting pin support portion 113 and the extended seating portion 115 , the upper surface of the first body portion 102 and the second body portion 104 . The upper surface of the can achieve the same height.

In addition, as the lower surface of the first base part 121 is provided to have a step difference with the lower surfaces of the first connecting pin support part 113 and the extended seating part 115 , the region (first one) in which the first coil 50 is wound. The lower surface area of the base part 121) can be visually identified. Accordingly, in the coil winding unit 111 , the first coil 50 can be easily wound up to the lower surface of the first base unit 121 .

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

A core insertion hole 129 into which portions of the first core member 108 - 1 and the second core member 108 - 2 are respectively inserted may be provided inside the first winding body 123 . The core insertion hole 129 may be provided in a height direction (ie, a vertical direction) of the first body portion 102 . Here, the height direction may refer to the 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 the longitudinal direction of the first body portion 102 . Here, the longitudinal direction may mean an X-axis direction in FIG. 2 .

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

As the first cover part 125 is provided outside the first winding body part 123 at the lower end of the first winding body part 123 , the first coil wound on the outer circumferential surface of the first winding body part 123 . (50) is restricted from moving downward by the first cover part 125, and can be wound between the lower surface of the first cover part 125 and the first base part 121.

The first extension part 127 may be provided to extend from both sides of the first cover part 125 . The first extension part 127 may be provided to be inclined downward from both sides of the first cover part 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 integrally. In addition, the first base part 121 , the first winding body part 123 , the first cover part 125 , and the first extension part 127 may be made of an insulating material.

An erroneous insertion prevention groove 151 may be provided at an end of the first extension 127 . In an exemplary embodiment, the erroneous insertion prevention groove 151 may be provided at an end corresponding to the first connecting pin support 113 in the first extension 127 , but is not limited thereto. The misalignment prevention groove 151 may function to prevent the second body portion 104 from being coupled in the wrong direction when coupled to the first body portion 102 . A detailed description thereof will be provided later.

The first connecting pin support part 113 may be provided on one side of the first base part 121 . The first connecting pin support part 113 may be vertically connected to the first base part 121 . That is, the first connecting pin support part 113 may be provided to extend from one side of the first base part 121 in the width direction of the first base part 121 . Here, the width direction may mean the Y-axis direction in FIG. 2 .

One or more first connecting pin members 131 to which the first coil 50 is connected may be provided at an outer end (outward-facing end) of the first connecting pin support 113 . The first connecting pin member 131 may be connected to the first connecting pin support protrusion 113a provided to protrude from the upper surface of the first connecting pin support 113 .

The first locking protrusions 133 may protrude from both sides of the upper surface of the first connecting pin support 113 . An end of the first bobbin fixing part 106 - 1 may be caught and fixed to the first locking protrusion 133 .

Meanwhile, a coil connection hole 157 may be provided in the first body portion 102 . In an exemplary embodiment, the coil connection hole 157 may be provided by cutting a part of the first connection pin support part 113 and the first base part 121 inward. The coil connection hole 157 is a first connection pin member 131 in which the first coil 50 wound on the coil winding unit 111 is provided in the first connection pin support unit 113 through the coil connection hole 157 . in order to be directly connected to The coil connection hole 157 is provided so that, when the second body 104 is coupled to the first body 102 , the first coil 50 is exposed outside the upper portion of the first connecting pin support 113 . can be

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

The extended seating part 115 may be connected to the other side of the first base part 121 . The extended seating part 115 may be vertically connected to the first base part 121 . The extended seating part 115 may be provided to extend from the other side of the first base part 121 in the width direction of the first base part 121 . The lower surface of the extended seating part 115 may be seated on the upper surface of the second body part 104 .

Second locking protrusions 135 may be provided on both sides of the upper surface of the extended seating part 115 . An end of the second bobbin fixing part 106 - 2 may be caught and fixed to the second locking protrusion 135 .

In addition, a second edge partition wall 119 may be provided between the first base portion 121 and the extended seating portion 115 . The second edge partition wall 119 may be provided at a boundary between the first base part 121 and the extended seating part 115 . The second edge partition wall 119 may be provided to protrude along the edge of one end (the end facing the first base part 121 ) of the extended seating part 115 .

A second coil 60 is wound around the second body 104 . The second body portion 104 may be coupled to the first body portion 102 at a lower portion of the first body portion 102 . In an exemplary embodiment, the second body portion 104 may be coupled to the first body portion 102 by being pressed upward in a state located at the lower portion of the first body portion 102 . In addition, the first body portion 102 may be coupled to the second body portion 104 by pressing the first body portion 102 downward in a state located on the upper portion of the second body portion (104). That is, the first body portion 102 and the second body portion 104 may be coupled to each other by being pressed in the vertical direction.

The second body portion 104 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 seated on the lower surface of the first connecting pin support part 113 and the extended seating part 115 from the outside of the first base part 121 . The second base part 141 may be provided in contact with the first base part 121 from the outside of the first base part 121 .

In an exemplary embodiment, the first base part 121 may be provided lower than the lower surfaces of the first connecting pin support part 113 and the extended seating part 115 by a height corresponding to the thickness of the second base part 141 . have. In this case, when the second base part 141 is seated on the lower surface of the first connecting pin support part 113 and the extended seating part 115 from the outside of the first base part 121 , the second base part 141 is It can be positioned at a height corresponding to the first base part 121 .

That is, the upper surface of the second base part 141 may be located on the same plane as the upper surface of the first base part 121 . In addition, the lower surface of the second base part 141 may be located on the same plane as the lower surface of the first base part 121 . The second base part 141 may be provided outside the first base part 121 without a step difference from the first base part 121 . A boundary surface in contact between the first base part 121 and the second base part 141 may be provided at the same height.

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

In an exemplary embodiment, when the second body portion 104 is coupled to the first body portion 102 , the height of the second connecting pin support portion 137 may be provided to correspond to the height of the second edge partition wall 119 . can One or more second connecting pin members 139 to which the second coil 60 is connected may be provided at an end of the second connecting pin supporting part 137 .

The second winding body part 143 may be provided to protrude downward from the lower surface of the second base part 141 . The second coil 60 may be wound on the outer circumferential surface of the second winding body 143 . In an exemplary embodiment, the second winding body portion 143 may be provided in the shape of a square tube or a columnar column protruding downward from the lower surface of the second base portion 141 , but the shape is not limited thereto and the outer peripheral surface thereof is not limited thereto. The second coil 60 may be wound in various shapes.

An accommodating hole 149 into which the coil winding part 111 is inserted and accommodated may be provided inside the second winding body part 143 . The accommodation hole 149 may be provided with an area corresponding to the area of the coil winding unit 111 . 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 pass through the second base part 141 . The accommodation hole 149 may be provided along the longitudinal direction of the second body portion 104 .

When the second body portion 104 is positioned under the first body portion 102 and then pressed upward, the second body portion 104 and the first body portion 102 are vertically coupled and the coil winding portion 111 ) is inserted into the receiving hole 149 to be accommodated. In this case, the coil winding part 111 has a shape surrounded on all sides by the second winding body part 143 . Accordingly, the first coil 50 can be protected from the external environment by the second body portion 104 . In addition, the first coil 50 can be restricted from moving outward by the second body portion 104 . When the coil winding unit 111 is inserted into the receiving hole 149 , the upper and lower surfaces of the coil winding unit 111 may be provided at a height corresponding to the upper and lower surfaces of the second body unit 104 .

The second winding body portion 143 may be provided with an erroneous insertion prevention protrusion 153 . In an exemplary embodiment, the erroneous insertion prevention protrusion 153 may be provided to protrude from the inner wall of the second winding body 143 . That is, the erroneous insertion prevention protrusion 153 may be provided to protrude from the inner wall of the second winding body 143 toward the receiving hole 149 . When the second body portion 104 and the first body portion 102 are vertically coupled, the erroneous insertion prevention protrusion 153 may be provided to be inserted into the erroneous insertion prevention groove 151 . Here, it has been described that the erroneous insertion prevention groove 151 is formed on the first extension part 127 and the erroneous insertion prevention protrusion 153 is formed on the second winding body part 143, but the present invention is not limited thereto. 153 may be formed in the first extension portion 127 , and an erroneous insertion prevention groove 151 may be formed in the second winding body portion 143 .

The erroneous insertion prevention groove 151 and the erroneous insertion prevention protrusion 153 are for preventing the second body 104 from being coupled in the forward direction when coupled to the first body 102 and from being coupled in the reverse direction. Here, in the forward direction, a portion of the second base portion 141 in which the second connection pin support part 137 is not formed is seated on the lower surface of the first connection pin support part 113 , and the second connection pin support part 137 is formed. It may mean a direction in which the portion is seated on the lower surface of the extended seating part 115 . And, the reverse direction may mean a direction opposite to the forward direction. The erroneous insertion prevention groove 151 and the erroneous insertion prevention protrusion 153 may be referred to as an erroneous insertion prevention part.

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

As the second cover part 145 is provided outside the second winding body part 143 at the lower end of the second winding body part 143 , the second coil wound on the outer circumferential surface of the second winding body part 143 . The movement of 60 is limited by the second cover part 145 and can be wound between the second cover part 145 and the lower surface of the second base part 141 .

When the second body portion 104 is coupled to the first body portion 102 , the second cover portion 145 comes into contact with the first cover portion 125 at both sides in the width direction of the first cover portion 125 . can be provided. In addition, the second cover part 145 may be located at a height corresponding to the first cover part 125 . That is, the upper surface of the second cover part 145 may be located on the same plane as the upper surface of the first cover part 125 . The lower surface of the second cover part 145 may be positioned on the same plane as the lower surface of the first cover part 125 . The second cover part 145 may be provided on both sides of the first cover part 125 in the width direction without a step difference from the first cover part 125 . The interface between the first cover part 125 and the second cover part 145 may be provided at the same height.

The second extension part 147 may be provided to extend from both sides of the second cover part 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 integrally. In addition, the second base part 141 , the second winding body part 143 , the second cover part 145 , and the second extension part 147 may be made of an insulating material.

The second extension 147 may include a 2-1 extension 147 - 1 and a 2 - 2 extension 147 - 2 . The 2-1 extension portion 147 - 1 may extend downward from both sides of the second cover portion 145 . In an exemplary embodiment, the 2-1 extension portion 147 - 1 may extend obliquely downward from both sides of the second cover portion 145 . The 2-2 extension part 147 - 2 may extend in a horizontal direction from an end of the 2-1 extension part 145 - 1 .

When the second body portion 104 is coupled to the first body portion 102 , the 2-1 extension portion 147 - 1 is formed with the first extension portion 127 and the first extension portion 127 from the outside of the first extension portion 127 . It can be provided in contact. The first extension 127 and the 2-1 extension 147 - 1 may have the same inclination. Accordingly, the 2-1 extension portion 147 - 1 may be provided outside the first extension portion 127 without a step difference from the first extension portion 127 .

In this way, the coil winding portion 111 of the first body portion 102 is inserted and accommodated in the receiving hole 149 of the second body portion 104 , and the coil winding portion 111 and the second body portion 104 are accommodated. ) have the same height (that is, the upper and lower surfaces of the coil winding unit 111 are positioned on the same plane as the upper and lower surfaces of the second body 104, respectively), thereby minimizing the thickness of the transformer 100 be able to do

The bobbin fixing part 106 may serve to fix the first body part 102 and the second body part 104 in a state in which the first body part 102 and the second body part 104 are coupled. . The first bobbin fixing part 106 - 1 may fix the first body part 102 and the second body part 104 at one side of the first body part 102 and the second body part 104 . The second bobbin fixing part 106 - 2 may fix the first body part 102 and the second body part 104 from the other side of the first body part 102 and the second body part 104 .

The bobbin fixing part 106 may include a seating support part 106a, a pair of side support parts 106b, and a pair of elastic support parts 106c. The seating support portion 106a may be provided in the width direction of the second body portion 104 from the lower portion of the second body portion 104 . The seating support part 106a may be seated on the lower surface of the 2-2 th extension part 147 - 2 . The seating support portion 106a may be provided with a width narrower than the width of the 2-2 th extension portion 147 - 2 .

A pair of side support portions 106b may be provided upwardly from both sides of the seating support portion 106a. A substrate seating protrusion 106d may be provided to protrude outward from the outer surface of the pair of side support portions 106b. Due to the substrate seating protrusion 106d, the transformer 100 can be mounted on one surface of the substrate (not shown).

In addition, a hook portion 106e may be provided at an end of the pair of side support portions 106b. The hook portion 106e may be caught on the upper surface of the first body portion 102 . Specifically, the hook part 106e of the first bobbin fixing part 106 - 1 may be caught by the first locking protrusion 133 to be fixed. The hook part 106e of the second bobbin fixing part 106 - 2 may be caught by the second locking protrusion 135 to be fixed.

The pair of elastic support parts 106c may have one end connected to the side of the pair of side support parts 106b, respectively, and the other end may be bent to face each other. In this case, the other ends of the pair of elastic support parts 106c may be provided to be spaced apart from each other.

Here, the bobbin fixing part 106 spreads a pair of side support parts 106b to both sides in a state located under the second body part 104 so that the hook part 106e is connected to the first locking protrusion 133 and the second to be caught by the locking protrusion 135 . At this time, as the other ends of the pair of elastic support portions 106c are spaced apart from each other, the pair of side support portions 106b can be coupled while being easily spread apart to both sides.

The core member 108 is used as a magnetic core of the transformer 100 . The core member 108 may include a first core member 108 - 1 and a second core member 108 - 2 . The first core member 108-1 is seated on the upper side of the first body portion 102 and the second body portion 104, and the second core member 108-2 includes the first body portion 102 and the second body portion 104. 2 It may be seated on the lower side of the body portion (104).

The first core member 108-1 may include a first core body 108-1a, a first core protrusion 108-1b, and a first side protrusion 108-1c. The first core body 108-1a may be provided in a flat plate shape. The first core body (108-1a) may be seated on the upper side of the first body portion 102 and the second body portion (104).

The first core protrusion 108-1b may be provided to protrude downward from the lower surface of the first core body 108-1a. 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 protrusions 108-1c may protrude downward from both sides of the first core body 108-1a. When the first core body (108-1a) is seated on the upper side of the first body part (102) and the second body part (104), the first side protrusion part (108-1c) is the second body part (104). It may be provided to cover both sides.

The second core member 108-2 may include a second core body 108-2a, a second core protrusion 108-2b, and a second side protrusion 108-2c. The second core body 108-2a may be provided in a flat plate shape. The second core body 108 - 2a may be seated under the first body portion 102 and the second body portion 104 .

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

The second side protrusion 108-2c may protrude upward from both sides of the second core body 108-2a. When the second core body (108-2a) is seated on the lower side of the first body portion (102) and the second body portion (104), the second side projection (108-2c) of the second body portion (104) It may be provided to cover both sides.

Here, it has been described that the first core member 108-1 and the second core member 108-2 are formed in an EE shape and a part thereof is respectively inserted into the core insertion hole 129, but the present invention is not limited thereto. In addition to the core member 108-1 and the second core member 108-2, various types of core members such as an EI type, an EVD type, an EED type, an EP type, and an EEH type may be used. According to the shape of the core member 108 , at least one of the first core member 108 - 1 and the second core member 108 - 2 may be inserted into the core insertion hole 129 .

Meanwhile, the transformer 100 is configured to secure the insulation distance between the first coil 50 and the second coil 60 and the core member 108 and the insulation distance between the first coil 50 and the second coil 60 . It may further include an insulating member 110 for 6 is a view showing a state before the insulating member is attached in the transformer according to an embodiment of the present invention, and FIG. 7 is a view showing the state in which the insulating member is attached in the transformer according to an embodiment of the present invention .

6 to 7 , the insulating member 110 may include a first insulating member 110-1, a second insulating member 110-2, and a third insulating 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 for the insulating member 110 , but the present invention is not limited thereto.

The first insulating member 110 - 1 may be attached to one end in the longitudinal direction of the bobbin 101 to which the first body portion 102 and the second body portion 104 are coupled. Specifically, the first insulating member 110 - 1 may be attached to one end of the bobbin 101 on which the first connecting pin support 113 is formed. The first insulating member 110 - 1 may be provided to cover the second coil 60 wound around the second winding body 143 at one end of the bobbin 101 .

The first insulating member 110-1 is attached to the upper surface of the second base part 141 (ie, it is attached between the first connecting pin support part 113 and the second base part 141) and bent downward to make the first insulating member 110-1. It may be attached to the lower surface of the 2-2 extension part 147 - 2 while covering the second coil 60 . Accordingly, the first insulating member 110 - 1 serves to secure an insulating distance between the first coil 50 and the second coil 60 connected to the first connecting pin support 113 .

Here, the width of the first insulating member 110 - 1 may be provided to be wider than the width of the second coil 60 . In addition, the width of the first insulating member 110 - 1 may be provided to be less than or equal to the width of the second base portion 141 .

The second insulating member 110 - 2 and the third insulating member 110 - 3 may be attached to both sides of the bobbin 101 in the longitudinal direction, 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 sides of the bobbin 101 , respectively. The second insulating member 110 - 2 and the third insulating member 110 - 3 may be provided to surround the upper surface, the side surface, and the lower surface of both sides of the bobbin 101 .

In this case, the second insulating member 110 - 2 and the third insulating member 110 - 3 cover the boundary between the first base part 121 and the second base part 141 on the upper side of the bobbin 101 and are provided. and may be provided to cover the boundary between the first cover part 125 and the second cover part 145 from the lower side of the bobbin 101 . The second insulating member 110 - 2 and the third insulating member 110 - 3 may serve to secure an insulating distance between the first coil 50 and the second coil 60 .

The second insulating member 110 - 2 and the third insulating member 110 - 3 may be provided to be longer than the length of the core insertion hole 129 . The second insulating member 110 - 2 and the third insulating member 110 - 3 may have an extended length L1 extending from both ends of the core insertion hole 129 . Here, the extended 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 to have a length corresponding to that of the first base part 121 .

Meanwhile, the first insulating member 110-1 is provided at one end of the bobbin 101 in the longitudinal direction, and the second insulating member 110-2 and the third insulating member 110-3 are provided at the bobbin 101. In the state provided on both sides of the first bobbin fixing part 106 - 1 and the second bobbin fixing part 106 - 2 may be coupled to both sides of the bobbin 101 . In this case, the first bobbin fixing part 106 - 1 may serve to attach the first insulating member 110 - 1 to the bobbin 101 .

The seating support part 106a of the first bobbin fixing part 106-1 presses the lower part of the first insulating member 110-1 attached to the lower surface of the 2-2 extension part 147-2, 1 Since the pair of elastic support parts 106c of the bobbin fixing part 106-1 press the side of the first insulating member 110-1, the first insulation during post-processing such as soldering operation or impregnation operation It is possible to prevent the member 110 - 1 from being lifted up and to be in close contact with the bobbin 101 .

In addition, the first insulating member 110-1 is provided at one end of the bobbin 101 in the longitudinal direction, and the second insulating member 110-2 and the third insulating member 110-3 are the bobbin 101. In a state provided on both sides of the , the first core member 108 - 1 and the second core member 108 - 2 may be mounted while being inserted into the core insertion hole 129 , respectively. In this case, the first core member 108 - 1 and the second core member 108 - 2 are positioned outside the second insulating member 110 - 2 and the third insulating member 110 - 3 . Due to the second insulating member 110-2 and the third insulating member 110-3, the insulating distance between the first coil 50 and the second coil 60 and the core member 108 and the first coil ( 50) and the insulating distance between the second coil 60 can be stably secured.

That is, by attaching the second insulating member 110-2 and the third insulating member 110-3 to both sides of the bobbin 101, the insulation distance between the first coil 50 and the core member 108 and the 2 It is possible to secure a winding area while simultaneously securing an insulation distance between the coil 60 and the core member 108 .

Meanwhile, in the disclosed embodiment, the first coil 50 and the second coil are formed by forming the first insulating member 110 - 1 at one end of the bobbin 101 where the first connecting pin support 113 is formed. It is possible to secure the insulation distance between the (60), thereby reducing the length of the bobbin 101, it is possible to reduce the size of the transformer (100). That is, by forming the first insulating member 110 - 1 at one end of the bobbin 101 where the first connecting pin support 113 is formed, the insulation distance between the first coil 50 and the second coil 60 . There is no need to extend the length of the second body portion 104 for securing.

8 is a plan view showing the first body portion 102 and the second body portion 104 in the disclosed embodiment. Referring to FIG. 8 , the width D2 of the portion seated on the lower surface of the first connection pin support part 113 in the second base part 141 is provided to be less than or equal to the width D1 of the first connection pin support part 113 . can be That is, even if the width D2 of the portion seated on the lower surface of the first connection pin support part 113 in the second base part 141 is less than or equal to the width D1 of the first connection pin support part 113 , the first insulation Since the member 110 - 1 is formed at one end of the bobbin 101 , it is possible to secure an insulation distance between the first coil 50 and the second coil 60 , thereby improving the performance of the transformer 100 . while keeping the length to a minimum.

9 is a perspective view illustrating a state before the transformer according to an embodiment of the present invention is seated on a substrate, and FIG. 10 is a perspective view illustrating a state in which the transformer according to an embodiment of the present invention is seated on the substrate.

9 and 10 , a transformer accommodating hole 162 for accommodating the transformer 100 may be provided in the substrate 160 . Here, it is illustrated that the transformer accommodating hole 162 is provided at the center of the substrate 160 , but the position of the transformer accommodating hole 162 is not limited thereto. In addition, in the substrate 160 , the first connecting pin insertion hole 164 and the second connecting pin insertion hole into which the first connecting pin member 131 and the second connecting pin member 139 of the transformer 100 are respectively inserted (166) may be provided.

The transformer 100 is mounted on the substrate 160 by mounting the substrate seating protrusions 106d of the first bobbin fixing part 106 - 1 and the second bobbin fixing part 106 - 2 on the upper surface of the substrate 160 . can be Then, the first connecting pin member 131 and the second connecting pin member 139 are inserted and fixed into the first connecting pin insertion hole 164 and the second connecting pin insertion hole 166, respectively, so that the first connecting pin member It is possible to distribute the load of the member 131 and the second connecting pin member 139 .

11 is a plan view showing a transformer according to another embodiment of the present invention, and FIG. 12 is a cross-sectional view showing a cross-section in the I-I' direction in the transformer according to another embodiment of the present invention.

11 to 12 , the transformer 100 includes a first core member 108 - 1 and a second body portion 108 to a bobbin 101 to which the first body portion 102 and the second body portion 104 are coupled. In a state in which the core member 108 - 2 is inserted into the core insertion hole 129 and mounted, the insulating molding part 170 may be molded and provided. The insulating molding unit 170 is made of an insulating material and may be provided through a molding process.

In an exemplary embodiment, the insulating molding unit 170 is formed on the bobbin 101 by the insulating member 110 (ie, the first insulating member 110-1, the second insulating member 110-2, and the third insulating member 110). The member 110-3) may be molded in a state in which it is not attached. That is, 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 between the first coil 50 and the second coil 60 . In order to secure a distance, an insulating molding unit 170 may be formed instead of the insulating member 110 .

Specifically, the insulating molding unit 170 may be provided to cover each side of the bobbin 101 . Since the second body 104 is coupled from the outside of the first body 102 , the second coil 60 wound around the second body 104 is exposed to the outside. In this case, the insulating molding part 170 may be provided to surround each side of the bobbin 101 so that the second coil 60 is not exposed to the outside. The insulating molding part 170 may be provided between the upper surface of the second base part 141 and the lower surface of the second extension part 147 on each side of the bobbin 101 .

In addition, the insulating molding unit 170 may be provided on the upper surface and the lower surface of the bobbin 101 , respectively. In this case, the insulating molding part 170 may be provided between the uppermost end and the lowermost end of the transformer 100 . The uppermost end of the transformer 100 may mean the highest portion in the height direction (Z-axis direction), and the lowermost end of the transformer 100 may mean the lowest portion in the height direction.

The insulating molding part 170 may be provided on the area of the first base part 121 and the second base part 141 on the upper surface of the bobbin 101 . That is, the insulating molding part 170 may be provided on the upper surfaces of the first base part 121 and the second base part 141 . In this case, the insulating molding part 170 may be provided to be less than or equal to the height of the first edge partition wall 117 and the second edge partition wall 119 . In addition, the insulating molding unit 170 may be provided to be less than or equal to the height of the first core member 108 - 1 . In this case, the height may be a height based on a direction opposite to gravity (upper direction).

In addition, the insulating molding part 170 may be provided between the first body part 102 and the second body part 104 . In an exemplary embodiment, the insulating molding part 170 may be provided to surround each side of the first body part 102 . In this case, the insulating molding part 170 may be provided to surround the first coil 50 wound on the first body part 102 .

In addition, the insulating molding part 170 may be provided on the first connecting pin support part 113 on the upper surface of the bobbin 101 . In this case, the insulating molding part 170 may be provided to be less than or equal to the height of the first edge partition wall 117 . The insulating molding part 170 may be provided to cover the coil connection hole 157 . At this time, the insulating molding part 170 is exposed through the coil connection hole 157 to cover the first coil 50 connected to the first connection pin member 131 so that the first coil 50 is not exposed to the outside. can prevent it However, the present invention is not limited thereto, and the insulating molding unit 170 may be provided to cover only the coil connection hole 157 portion. The insulating molding part 170 may be provided to surround one end of the first connection pin member 131 connected to the first connection pin support part 113 .

In addition, the insulating molding part 170 may be provided on the mounting part 115 extending from the upper surface of the bobbin 101 . In this case, the insulating molding part 170 may be provided to be less than or equal to the height of the second edge partition wall 119 . The insulating molding part 170 may be provided to surround one end of the second connection pin member 139 connected to the second connection pin support part 137 .

In addition, the insulating molding part 170 may be provided on the area of the first cover part 125 and the second cover part 145 on the lower surface of the bobbin 101 . That is, the insulating molding part 170 may be provided on lower surfaces of the first cover part 125 and the second cover part 145 . In this case, the insulating molding part 170 may be provided to be less than or equal to the height of the 2-2 extension part 147 - 2 and the second core member 108 - 2 . At this time, the height may be a height based on the direction of gravity (lower direction).

In this way, by providing the insulating molding part 170 on the bobbin 101, 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 an insulation distance between the first coil 50 and the second coil 60 can be secured.

Here, the insulating molding unit 170 includes an insulation distance between the first coil 50 and the core member 108 , an insulation distance between the second coil 60 and the core member 108 , and the first coil 50 and the second coil 50 . It may be provided in each area necessary to secure an insulation distance between the two coils 60 .

In addition, by providing the insulating molding unit 170 on the bobbin 101, heat is transferred from the first coil 50 and the second coil 60 where heat is generated to the insulating molding unit 170 and the core member 108 side. As this occurs, heat is diffused and the temperature characteristic of the transformer 100 can be improved.

Comparing the temperature characteristics with and without the insulating molding unit 170, the temperature of the transformer 100 in the absence of the insulating molding unit 170 was 72.8 ° C. In this state, the temperature of the transformer 100 was lowered by 4.7°C to 68.1°C.

On the other hand, here, the insulation distance between the first coil 50 and the core member 108 through the insulation molding part 170 instead of the insulation member 110, the insulation distance between the second coil 60 and the core member 108, And it has been described that the insulating distance between the first coil 50 and the second coil 60 is secured, but the present invention is not limited thereto, and both the insulating member 110 and the insulating molding part 170 may be formed.

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 inserted into the core insertion hole 129 to be mounted. Next, the insulating molding part 170 may be formed on each side, upper surface, and lower surface of the bobbin 101 .

In this case, 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 first coil 50 and the second coil 60 . The insulating distance can be primarily secured through the first insulating member 110-1, the second insulating member 110-2, and the third insulating member 110-3, and the insulating molding unit 170 is formed. can be obtained secondarily.

In addition, although it has been described herein that the insulating molding part 170 is formed in a state in which the first core member 108 - 1 and the second core member 108 - 2 are respectively inserted into the core insertion hole 129 , the present invention is limited thereto. However, after the insulating molding part 170 is first formed, the first core member 108 - 1 and the second core member 108 - 2 may be respectively inserted into the core insertion hole 129 to be mounted.

Meanwhile, when the insulating molding part 170 is formed on the bobbin 101 , the bobbin fixing part 106 may not be formed. That is, when the insulating molding part 170 is formed on each side, upper surface, and lower surface of the bobbin 101 , the first body part 102 and the second body part 104 are formed by the insulating molding part 170 . Since it can be fixed, the bobbin fixing part 106 may not be separately formed.

In addition, a portion of the insulating molding part 170 may be formed to protrude outward like the shape of the substrate seating protrusion 106d. In this case, the transformer 100 may be seated on the substrate through the outwardly protruding portion of the insulating molding unit 170 .

In another embodiment, the insulating molding part 170 may not be formed on the side surface of the first body part 102 , but the insulating molding part 170 may be formed on the side surface of the second body part 104 . At this time, the insulating molding portion 170 may be formed on the upper and lower surfaces of the first body portion 102 and the second body portion 104, respectively, but the present invention is not limited thereto. The insulating molding part 170 may not be formed on the upper and lower surfaces of the body part 104 .

In another embodiment, the insulating molding part 170 is formed on the side surface of the first body part 102 , and the first connecting pin support part 113 is connected to the first insulating member 110 - 1 from the bobbin 101 . It can be attached to one end that is formed. At this time, the first body portion 102 and the second body portion 104, the upper and lower surfaces of the insulating molding portion 170 may be formed, respectively, but is not limited thereto, and the first body portion 102 and the second The insulating molding part 170 may not be formed on the upper and lower surfaces of the body part 104 .

Although representative embodiments of the present invention have been described in detail above, those of ordinary skill in the art will understand that various modifications are possible without departing from the scope of the present invention with respect to the above-described embodiments. . Therefore, the scope of the present invention should not be limited to the described embodiments, and should be defined by the claims described below as well as the claims and equivalents.

100: transformer
101: bobbin
102: first body part
104: second body portion
106: bobbin fixing part
106-1: first bobbin fixing part
106-2: second bobbin fixing part
106a: seating support
106b: a pair of side supports
106c: a pair of elastic supports
106d: substrate seating projection
106e: hook part
108: core member
108-1: first core member
108-1a: first core body
108-1b: first core protrusion
108-1c: first side protrusion
108-2: second core member
108-2a: second core body
108-2b: second core protrusion
108-2c: second side protrusion
110: insulation member
110-1: first insulating member
110-2: second insulating member
110-3: third insulating member
111: coil winding part
113: first connecting pin support part
113a: first connecting pin support protrusion
115: extension seating part
117: first border bulkhead
119: second border bulkhead
121: first base part
123: first winding body portion
125: first cover part
127: first extension
129: core insertion hole
131: first connecting pin member
133: first locking projection
135: second locking projection
137: second connecting pin support part
139: second connecting pin member
141: second base part
143: second winding body portion
145: second cover part
147: second extension
147-1: 2-1 extension
147-2: 2-2 extension part
149: reception hall
151: erroneous prevention groove
153: erroneous prevention protrusion
157: coil connection hole
160: substrate
162: transformer receiving hole
164: first connecting pin insertion hole
166: second connection pin insertion hole
170: insulation molding part

Claims (20)

A first body part including a coil winding part in which a first coil is wound and a core insertion hole is provided therein, and a second coil wound therein, and having a receiving hole in which the coil winding part is inserted and accommodated, the first body part a bobbin including a second body portion coupled to the first body portion from the outside;
a first core member seated on upper sides of the first body portion and the second body portion, and a second core member seated on lower sides of the first body portion and the second body portion, wherein the first core member and the At least one of the second core members may include a core member, a part of which is inserted into the core insertion hole; and
A transformer comprising an insulating molding provided on the outside of the bobbin.
The method according to claim 1,
The insulating molding part,
The transformer is provided to secure 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 method according to claim 2,
When the coil winding part is inserted into the receiving hole, the upper and lower surfaces of the coil winding part are provided at a height corresponding to the upper surface and the lower surface of the second body part, the transformer device.
3. The method according to claim 2,
The first body portion further includes a first connecting pin member to which the first coil is connected, and a first connecting pin support unit connected to one side of the coil winding unit and supporting the first connecting pin member,
The second body part includes a second connection pin member to which the second coil is connected, and a second connection pin support part provided on an opposite side of the first connection pin support part in the second body part and supporting the second connection pin member. Further comprising, a transformer.
5. The method according to claim 4,
The coil winding unit,
a first base part having one side connected to the first connecting pin support part;
a first winding body portion provided under the first base portion and on which the first coil is wound on the outside; and
and a first cover part provided outside the first winding body part in the first winding body part and restricting a lower movement of the first coil.
6. The method of claim 5,
The second body portion,
a second base part provided at a height corresponding to the first base part from the outside of the first base part and having an upper surface of one side mounted on a lower surface of the first connecting pin support part;
a second winding body portion provided under the second base portion, the second coil wound on the outside, and the receiving hole provided on the inside; and
and a second cover part provided outside the second winding body part in the second winding body part and restricting a lower movement of the second coil.
7. The method of claim 6,
In the second base portion, a width of a portion seated on a lower surface of the first connecting pin support portion is provided to be less than or equal to a width of the first connecting pin support portion.
7. The method of claim 6,
The insulating molding part,
The transformer is provided to surround each side of the bobbin so that the second coil is not exposed to the outside.
9. The method of claim 8,
The insulating molding part,
A portion of the bobbin is provided in a shape protruding to the outside so that the transformer is seated on a substrate.
7. The method of claim 6,
The bobbin is
It is provided on the boundary between the first base part and the first connecting pin support part, and further comprising a first rim partition wall provided to protrude along the edge of the end of the first connecting pin support part facing the first base part , transformer.
11. The method of claim 2 or 10,
The insulating molding part,
A transformer provided between an uppermost end and a lowermost end of the transformer.
12. The method of claim 11,
The insulating molding part,
The first base part and the second base part are provided on the upper surface, the first edge barrier rib or the first core member, the pressure transformer is provided with a height less than the height of the core member.
12. The method of claim 11,
The bobbin is
an extension seating part connected to the other side of the first base part and having an upper surface of the other side of the second base part seated on a lower surface thereof; and
The transformer device further comprising a second edge barrier rib provided at a boundary between the first base part and the extended seating part.
14. The method of claim 13,
The insulating molding part,
The transformer is provided on the extended seating portion on the upper surface of the bobbin and is provided to be less than or equal to the height of the second edge partition wall.
15. The method of claim 14,
The insulating molding part,
A transformer provided to surround one end of the second connecting pin member connected to the second connecting pin support.
7. The method of claim 6,
The bobbin is
It is provided on the first body part, and a part of the first connecting pin support part and the coil winding part is cut inwardly so that the first coil is exposed to the outside and the first coil is connected to the first connecting pin member. Further comprising a coil connection hole for the transformer.
17. The method of claim 16,
The insulating molding part,
The transformer is provided on the first connecting pin support on the upper surface of the bobbin, and is provided to cover the coil connecting hole.
18. The method of claim 17,
The insulating molding part,
A transformer provided to surround one end of the first connecting pin member connected to the first connecting pin support.
The method according to claim 1,
The bobbin is
A first insulating member provided to cover the second coil from one end of the bobbin, a second insulating member provided to cover the second coil from one side of the bobbin in the longitudinal direction, and a longitudinal direction of the bobbin. The transformer device further comprising at least one of a third insulating member provided to cover the second coil from the other side.
As a bobbin,
a first body part including a coil winding part on which a first coil is wound and a core insertion hole is provided therein;
a second body part having a receiving hole in which a second coil is wound and the coil winding part is inserted and accommodated therein, and coupled to the first body part from the outside of the first body part; and
The bobbin is provided on the outside of the bobbin and comprises an insulating molding part for securing an insulation distance between the first coil and the second coil.

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