WO2020242187A1

WO2020242187A1 - Primary coil element for flat-type transformer and flat-type transformer

Info

Publication number: WO2020242187A1
Application number: PCT/KR2020/006833
Authority: WO
Inventors: 한택수; 이정수
Original assignee: 주식회사 에이텀; 한택수
Priority date: 2019-05-28
Filing date: 2020-05-27
Publication date: 2020-12-03
Also published as: KR20200136646A; KR102281274B1

Abstract

The present invention relates to a primary coil element for a flat-type transformer and a flat-type transformer. The primary coil element for a flat-type transformer according to the present invention comprises: a flat-type first coil element (110); and a flat-type second coil element (120) in contact with the first coil element (110), and the flat-type transformer according to the present invention comprises: a primary coil element (100); and a flat-type secondary coil element (200) for generating an induced current according to currents applied to the first coil element (110) and the second coil element (120).

Description

Primary side coil element for flat-type transformer and flat-type transformer

The present invention relates to a transformer, and in particular, by dividing the primary coil element into two coils, the primary coil element and flat plate for a flat-plate transformer to reduce leakage by increasing the area in close contact with the secondary coil element. It relates to a type transformer.

In general, a transformer has a primary coil and a secondary coil, and generally, a primary coil is used as an input stage and a secondary coil is used as an output stage.

Among the transformers, "transformers" according to Patent No. 10-1579427 (announcement date: December 22, 2015) are disclosed in relation to small transformers used in mobile phone chargers.

In the case of a transformer according to No. 10-1579427 above, the primary coil element for a transformer is composed of a so-called "PCB-type primary coil element" implemented by patterning a conductive material on an insulating substrate.

The PCB type primary coil device according to the prior art is manufactured by coating a copper foil on an insulating substrate and forming a coil circuit pattern by etching or the like.

However, the transformer according to No. 10-1579427 above adopts a structure in which a primary coil element is inserted between two secondary coil elements, so there are problems in the generation of a loss magnetic field and efficiency from the primary side to the secondary side. . In addition, it was pointed out as a problem that the height of the product [transformer] as a whole increased because the secondary coil element was separated from the top to the bottom.

In addition, since the conventional PCB type primary coil element forms a circuit pattern on the PCB substrate, there is a problem in that the manufacturing period is basically long, and thus it is not suitable for manufacturing a short delivery period. In addition, there is a problem that it is difficult to cope with design diversification (product tuning) because the PCB type primary coil element is basically patterned on the PCB substrate.

In addition, when the number of turns of the circuit pattern increases, there is a problem that the volume of the primary coil element increases due to the increase of the layer and the thickness of the PCB substrate, and the cost of the product increases due to the increase in the price of the PCB substrate. .

Prior patent literature

Document 1: Republic of Korea Patent Publication 10-1579427 (announcement date: 2015. 12. 22.)

Document 2: Republic of Korea Patent Application Publication 10-2016-0041837 (published on April 18, 2016)

The present invention was created to solve the problems of the prior art as described above, and the object of the primary side coil element and the flat-type transformer for a flat-type transformer according to the present invention,

First, by separating the primary coil element into a first coil element and a second coil element, the area in which the primary coil element is in close contact with the secondary coil element can be increased to reduce leakage and increase efficiency. and,

Second, the primary coil element for a flat-type transformer is divided into a wire winding coil and a substrate-type coil, and the main coil part through which a large current flows is composed of the main air core coil part, and the auxiliary coil pattern layer through which a relatively small current flows is formed. By doing so, it is possible to make the thickness of the primary coil element thinner,

Third, by forming an insertion hole in the board-type coil and electrically connecting the insertion hole and the primary terminal hole, it is possible to easily and conveniently connect the wire winding coil to the primary terminal pin.

Fourth, the wire winding coil is loaded into the housing and the wire is pulled out to make wiring easier and more convenient.

Fifth, the height of the coil element on the primary side can be lowered, and the appearance of the product can be made compact.

Sixth, the board-type coil eliminates the need for a separate cover, so the number of parts and the height of the product can be reduced.

Seventh, by alternately arranging the primary and secondary coil elements (in a zigzag manner), the leakage magnetic field can be remarkably reduced, so that the efficiency from the primary coil element to the secondary coil element can be improved.

Eighth, by implementing a part of the coil element on the primary side so that the insulating coated wires are in contact with each other and wound in a flat shape, unlike the conventional PCB substrate type primary coil element, the resistance is low and heat generation is low (excellent heat generation characteristics. ), and also allows the transfer efficiency to the secondary side coil element to be improved,

Ninth, it is possible to reduce the size of the primary coil element itself by manufacturing a part of the primary coil element in a flat plate shape with an air core without using a bobbin.

Tenth, by inserting the primary coil element between the inner protrusion and the outer protrusion, it prevents the flow or gap of the primary coil element and enables stable mounting.

The eleventh, by configuring the primary coil element as a hybrid type (hybrid type) of a wire winding coil and a substrate type coil, it provides a primary coil element and a flat plate type transformer suitable for coping with various design environments. I have to.

The primary coil element for a planar transformer according to the present invention for achieving the above object includes a first coil element having a plate shape, and a second plate shape that is in contact with the first coil element or spaced apart from the first coil element. It characterized in that it is configured to include a coil element.

The planar transformer according to the present invention for achieving the above object includes a primary coil element, and a planar secondary coil element in which an induced current is generated by the current applied to the first coil element and the second coil element. It characterized in that it is configured to.

The present inventors having the above-described configuration, the primary coil element and the flat-type transformer for a flat-type transformer has the following effects.

First, by separating the primary coil element into a first coil element and a second coil element, the area in which the primary coil element is in close contact with the secondary coil element can be increased, thereby reducing leakage and further increasing the efficiency. There is an effect.

Second, by dividing the primary coil element for a flat-type transformer into a wire winding coil and a substrate-type coil, and the main coil part through which a large current flows is composed of the main air core coil part, and formed as an auxiliary coil pattern layer through which a relatively small current flows There is an effect of reducing the thickness of the primary coil element.

Third, by forming an insertion hole in the substrate-type coil and electrically connecting the insertion hole and the primary terminal hole, there is an effect that it is possible to easily and conveniently connect the wire winding coil to the primary terminal pin.

Fourth, there is an effect that wiring can be easily and conveniently performed by pulling out the wire while the wire winding coil is loaded into the housing.

Fifth, there is an effect of lowering the height of the coil element on the primary side and making the appearance of the product compact.

Sixth, there is an effect of lowering the number of parts and the height of the product because a separate cover is not required by the substrate-type coil.

Seventh, by alternately arranging the primary and secondary coil elements (in a zigzag manner), the leakage magnetic field can be remarkably reduced, so that the efficiency from the primary coil element to the secondary coil element can be improved. have.

Eighth, by implementing a part of the coil element on the primary side so that the insulating coated wires are in contact with each other and wound in a flat shape, unlike the conventional PCB substrate type primary coil element, the resistance is low and heat generation is low (excellent heat generation characteristics. ), there is also an effect that the transfer efficiency to the secondary coil element can be improved.

Ninth, there is an effect of reducing the size of the primary coil element itself by manufacturing a part of the primary coil element in a flat plate shape of an air core without using a bobbin.

Tenth, by inserting the primary coil element between the inner protrusion and the outer protrusion, there is an effect of preventing the flow or clearance of the primary coil element and enabling stable mounting.

Eleventh, by configuring the primary coil element as a mixed type (hybrid type) of a wire winding coil and a substrate type coil, there is an effect capable of responding to various design environments.

1 is a perspective view of a primary-side coil device 100 for a flat-type transformer according to an embodiment of the present invention.

2 is an exploded configuration diagram of FIG. 1.

3 is an exploded configuration diagram of FIG. 2.

4 is a cross-sectional view of a primary coil element 100 for a flat-type transformer according to an embodiment of the present invention.

5 is an exploded perspective view of a case in which the wire winding coil 110 adopts the auxiliary air core coil unit 112 in the primary coil element 100 for a flat-panel transformer according to an embodiment of the present invention.

6 is in the primary coil element 100 for a flat-panel transformer according to an embodiment of the present invention, the substrate-shaped coil 120 is two of the upper substrate-type coil (120A) and the lower substrate-type coil (120B). It is an exploded perspective view when divided into a substrate.

7 is a perspective view of a planar transformer A according to an embodiment of the present invention.

8 is a rear perspective view of FIG. 7.

9 is an exploded perspective view of FIG. 7.

10 is a rear exploded perspective view of a secondary coil element in a flat-panel transformer (A) according to an embodiment of the present invention.

11 is a cross-sectional view of a planar transformer (A) according to an embodiment of the present invention.

12 is a perspective view of a first coil 211 and a second coil 221 in the planar transformer A according to an embodiment of the present invention.

13 is a perspective view illustrating a case in which a cover 130 is added in the flat-panel transformer A according to an embodiment of the present invention.

The following will be described in detail with reference to the accompanying drawings a preferred embodiment of the present inventors of the primary coil element for a flat-type transformer and a flat-type transformer.

The flat-panel transformer according to the present invention is a transformer mounted on a main PCB of a charger or adapter and used for a charger or adapter.

The primary-side coil device 100 for a flat-panel transformer according to an embodiment of the present invention includes a first coil device 110 on a flat plate, and a plane contact with the first coil device 110 or a first coil device. It is characterized in that it is configured to include a second coil element 120 in the shape of a flat plate located spaced apart from (110).

By separating the primary coil element 110 into the first coil element 110 and the second coil element 120 as described above, the area in which the primary coil element 100 is in close contact with the secondary coil element 200 There is an advantage in that the loss (leakage) can be reduced and the efficiency can be further increased by increasing the value.

Any one of the first coil element 110 and the second coil element 120 has a central air core 110a formed in the center and is formed by winding an insulating coated conductive wire in contact with each other to form a flat plate. Consisting of a winding coil 110, the remaining one of the first coil element 110 and the second coil element 120 has a through hole 120a communicating with the central air core 110a, and a conductor It is characterized in that the coil pattern layer in which the pattern is formed in a spiral shape is formed of a substrate-type coil 120 formed on an insulating substrate.

One or more coil pattern layers are stacked on the substrate-type coil 120, and the coil pattern layer is omitted in the drawings.

An insulating layer may be interposed between the coil pattern layers. For example, the substrate-type coil 120 according to the present embodiment may be, for example, a printed circuit board (PCB).

As described above, by dividing the primary coil element 100 for a flat-type transformer into a wire winding coil 110 and a substrate-type coil 120, it is possible to increase the contact area to reduce leakage and increase efficiency. There is an advantage that can be increased.

In addition, the main coil part through which a large current flows is composed of a wire winding coil 110, and the auxiliary coil part through which a relatively small current flows is composed of the substrate-type coil 120. There is an advantage that can be made thinner.

In addition, the applicant of the present invention refers to the primary coil element 100 for a flat-type transformer in which the primary-side coil element for a flat-type transformer is divided into a wire winding coil 110 and a substrate-type coil 120 as a "hybrid coil. Device".

The wire winding coil 110 is supported on one surface of the substrate-type coil 120 by being in contact with one surface (one of the upper surface 120b or the lower surface 120c) of the substrate-type coil 120 have.

In one embodiment of the present invention, it is described by way of example that the wire winding coil 110 is disposed on and in contact with the upper surface 120b of the substrate-type coil 120, but is not limited thereto. It goes without saying that even if 110) is disposed below the substrate-type coil 120 in contact with the lower surface 120c, it falls within the technical scope of the present invention.

A central hole (130a) is formed in the center so as to communicate with the central air core (110a) of the wire winding coil (110) and the through hole (120a) of the substrate type coil (120), and contacts the substrate type coil (120). The wire winding coil 110 in an inner space formed by the housing 130 and the substrate-type coil 120 further includes a housing 130 that covers the wire winding coil 110 that is supported and is It is characterized by being built-in. The housing 130 is formed of, for example, an insulating material made of a synthetic resin material.

The housing 130, the base portion 131 in which the central hole 130a is formed, and the outside of the base portion 131 (when the base portion 131 has a sheet shape, it will be an outer periphery). It is configured to include an outer guide 132 bent toward the plate-shaped coil 120 and an inner guide 133 bent toward the substrate-shaped coil 120 along the periphery of the central hole Sb.

The wire winding coil 110 is provided in a seating space Sa formed by the base portion 131 and the outer guide 132 and the inner guide 133, and the inner guide 215 is the wire winding coil ( 110) to hold the inner peripheral surface (100a') of the central air core (110a) of the wire winding coil 110 by contacting the inner peripheral surface (110a') of the central air core (110a), the outer guide 132 is the wire winding coil By contacting the outer circumferential surface 110b of 110 and holding the outer circumferential surface 110b of the wire winding coil 110, the wire winding coil 110 is provided in the seating space Sa of the housing 130 without any gap or flow. do.

The outer guide 132 and the inner guide 133 are formed to protrude in a frame shape.

Although the base portion 131 is formed in a plane shape, it is not limited thereto, and even when formed in a plurality of linear shapes, it is of course within the technical scope of the present invention.

The substrate-type coil 120 has a plurality of primary terminal holes 124 for fastening the primary terminal pins (P1), and is fastened to the primary terminal hole 124 to mount a transformer [ For example, four primary terminal pins P1 connected to the main PCB (not shown) of the charger or adapter] are further included. Current is supplied to the primary coil element 100 through the primary terminal pin P1.

In the primary-side coil element 100 for a flat-panel transformer according to an embodiment of the present invention, the substrate-type coil is separated from the primary-side terminal hole 124 so as to be electrically connected to the primary-side terminal hole 124 ( It is formed in 120), characterized in that it is configured to include an insertion hole 125 by inserting the wire of the wire winding coil 110.

When the wire of the wire winding coil 110 is inserted into the insertion hole 125, the insertion hole 125 is electrically connected to the primary terminal hole 124, so that the wire winding coil 110 is connected to the primary terminal pin (P1). ) And final.

Accordingly, by forming an insertion hole 125 in the substrate-shaped coil 120 and electrically connecting the insertion hole 125 and the primary terminal hole 124, the primary terminal pin of the wire winding coil 110 ( There is an advantage that the connection to P1) can be made easily and conveniently.

The primary-side coil device 100 for a flat-panel transformer according to an embodiment of the present invention is a wire drawer for pulling out the wire w of the wire winding coil 110 to the outer guide 132 of the housing 130 It is configured to further include a ball 135.

There is an advantage in that the wire winding coil 110 can be easily and conveniently connected by pulling out the wire in a state in which it is inserted into the housing 130.

In addition, since the wire of the wire winding coil 110 can be withdrawn through the outer guide 132 having the withdrawal hole 135 formed, it is possible to insert and connect the wire directly into the insertion hole 125 of the shortest distance by drawing the wire to the side. , There is an advantage that the height of the primary coil element 100 can be lowered, and the appearance of the product can be made compact.

As shown in FIG. 6, the substrate-type coil 120 is configured by being separated into an upper substrate-type coil 120A and a lower substrate-type coil 120B positioned spaced apart from the upper substrate-type coil 120A. In addition, the wire winding coil 110 is interposed between the upper substrate type coil 120A and the lower substrate type coil 120B and is provided.

As described above, the substrate-type coil 120 serves as a cover [or bottom] covering the seating space Sa of the housing 130. Therefore, since a separate cover is not required by the substrate-type coil 120, there is an advantage in that the number of parts and the height of the product can be reduced.

In general, the primary coil element 100 for a flat-panel transformer has a main coil portion that induces an induced voltage to the secondary coil element by applying a primary current through a main PCB of a finished product [transformer or adapter], and a main PCB (not shown). The auxiliary coil part used to drive the IC device or the like to be mounted in the city) is essentially provided, and a shielding part may be optionally provided according to embodiments.

The main coil part, the auxiliary coil part and the shield part constituting the primary coil device 100 for a flat-panel transformer may be configured in various combinations with the first coil device 110 and the second coil device 120, in any case. Of course, it belongs to the technical scope of the present invention.

In an embodiment of the present invention, an example in which the wire winding coil 110 is used as the first coil element 110 and the substrate-type coil 120 is used as the second coil element 120 is described. Listen and explain.

The wire winding coil 110 has a first air core 111a formed in the center and includes a main air core coil part 111 formed by contacting each other with insulating coated conductive wires and winding them in a flat plate shape. The main air core coil part 111 corresponds to the main coil part.

In addition, according to an embodiment, the wire winding coil 110 has a second air core 112a formed in the center, and is formed by winding an insulating coated conductive wire in contact with each other and winding it in a flat plate shape. An auxiliary air core coil unit 112 for generating and outputting an induced voltage may be further included, and the induced voltage output from the auxiliary air core coil unit 112 is an IC element mounted on a main substrate (not shown). It is used for driving as described above.

In addition, according to an embodiment, the wire winding coil 110 is provided in contact with the main air core coil part 111 and a central hole 113a is formed to communicate with the first air core 111a, and is formed in a flat plate shape. As a result, a conductive shielding member 113 for shielding EMI may be further included and configured.

The main air core coil unit 111 and the auxiliary air core coil unit 112 may be provided in both the wire winding coil 110, or only one of the two may be provided. In FIG. 3, the main air core coil unit 111 ) Is shown, and FIG. 5 shows an example in which the auxiliary air core coil unit 112 is provided.

In addition, in the substrate-type coil 120, as in the wire winding coil 110, at least one of a main coil pattern layer (not shown) corresponding to the main coil part and an auxiliary coil patch layer (not shown) corresponding to the auxiliary coil part. One is formed.

The main coil pattern layer is a conductor pattern layer for inducing an induced voltage to a secondary coil element by applying a primary current through a main PCB of a finished product [transformer or adapter], and the auxiliary coil pattern layer is a main PCB (not shown) As described above, it is a conductor pattern layer used to drive an IC device or the like mounted on the device.

In addition, depending on the embodiment, a shielding pattern layer for shielding EMI may be further formed on the substrate-type coil 120, and the shielding pattern layer is a configuration corresponding to the above-described shielding part.

Which of the wire winding coil 110 and the substrate-type coil 120 to configure the main winding portion, auxiliary winding portion, and shielding portion as described above may be configured in various combinations depending on the embodiment. Therefore, various modifications will be possible.

First, as shown in FIG. 3, the main air core coil part 111 corresponding to the main coil part is provided on the wire winding coil 110, and the auxiliary coil pattern layer (not shown) corresponding to the auxiliary coil part is a substrate type. It may be formed in the coil 120. In this embodiment, the shielding coil unit 113 may be selectively provided on the wire winding coil 110, and a shielding coil layer may be formed on the substrate-type coil 120 as well.

In addition, as shown in FIG. 5, a main coil pattern layer (not shown) corresponding to the main coil part may be formed on the substrate-type coil 120, and the auxiliary air core coil part 112 corresponding to the auxiliary coil part It may be provided in the wire winding coil 110. Even in this embodiment, the shielding coil unit 113 may be selectively provided on the wire winding coil 110, and a shielding coil layer may be formed on the substrate-type coil 120 as well.

In addition, the upper side is provided between the main air core coil unit 111 (or auxiliary air core coil unit 112) and the shield air core coil unit 113 and has a through hole communicating with the first air core 111a in the center An insulating sheet C1 may be further included. An adhesive layer is formed on the upper and lower surfaces of the upper insulating sheet C1, thereby performing an insulating function and an adhesive function of adhering the upper and lower components.

Depending on the embodiment, the lower adhesive sheet (C2) provided under the main air core coil portion 111 (or the auxiliary air core coil portion 112) and having a through hole communicating with the first air core 111a is formed in the center. It may be further included and configured. An adhesive layer is formed on the upper and lower surfaces of the lower insulating sheet C2, and thus performs an insulating function and an adhesive function for adhering the upper and lower components.

The upper and lower insulating sheets C1 and C2 may be formed of an insulating film made of a synthetic resin material.

In addition, in addition to FIGS. 3 and 5, it may be configured in various combinations. For example, the wire winding coil 110 includes a shielding air core coil unit 113 and a main air core coil unit 111, and the substrate-type coil 120 has the above A main coil pattern layer (not shown) connected in series with the main air core coil unit 111, an auxiliary coil pattern layer (not shown), and a shielding coil pattern layer (not shown) may be formed.

In addition to the combination of the above examples, the wire winding coil 110 and the substrate type coil 120 may be configured in various combinations, and in any case, it is of course within the technical scope of the present invention.

The primary coil element 100 for a flat-panel transformer according to an embodiment of the present invention further includes a connection pin Pn to which the wire winding coil 110 and the substrate-type coil 120 are respectively connected, and , The wire winding coil 110 and the substrate-type coil 120 are connected in series by the connection pin Pn.

Specifically, the main air core coil part 111 of the wire winding coil 110 and the main coil pattern layer (not shown) of the substrate-type coil 120 are directly connected to each other by a connection pin Pn.

In addition, the primary coil element 100 for a flat-type transformer according to an embodiment of the present invention reliably holds the wire winding coil 110 loaded therein without a gap or flow, and the substrate-type coil ( 120) may be configured to further include a fastening means (not shown) for reliably fixing.

The fastening means should be formed on the housing 130 and the substrate-type coil 120 so as to be fastened by a fitting type or formed by an insertion method.

Next, a planar transformer (A) having the primary coil element 100 for a planar transformer having the above configuration and action will be described.

The planar transformer (A) according to an embodiment of the present invention is an induced current by a current applied to the primary-side coil element 100 and the first coil element 110 and the second coil element 120 It is characterized in that it is configured to include a secondary side coil element 200 on a flat plate in which is generated.

The secondary coil element 200 includes a first coil body 210 and a second coil body 220 provided in contact with or spaced apart from the first coil body 210 To do.

In the planar transformer (A) according to an embodiment of the present invention, the first coil body 210 includes a first coil pattern part 211b formed in a flat spiral pattern, and the first coil pattern part Consists of a first connection part 211c that is bent upward at one end of (211b) and then bent back to be bent in a U shape, and a first terminal 211a formed at the end of the first connection part 211c The first coil 211 is formed, and a first insulating part 212 made of synthetic resin containing the first coil 211 excluding the first terminal 211a so that a first central through hole 210a is formed in the center. It characterized in that it is configured to include.

Likewise, the second coil body 220 is bent downward at one end of the second coil pattern part 221b formed in a flat spiral pattern and the second coil pattern part 221b, and then back to the rear. A second coil 221 composed of a second connection part 221c that is bent and bent in a U-shape, and a second terminal 221a formed at the end of the second connection part 221c, and a second central through hole in the center It is characterized in that it comprises a second insulating portion 212 made of a synthetic resin material containing the second coil 221 excluding the second terminal 221a so that (220a) is formed.

In the flat-panel transformer (A) according to an embodiment of the present invention, the first connection part 211c is bent upward at one end of the first coil pattern part 211b and then bent back to form a U-shape. Bending is formed, and the second connection part 221c is bent downward at one end of the second coil pattern part 221b and then bent back to form a U-shaped bend.

7 to 13, the planar transformer according to an embodiment of the present invention is characterized in that the primary coil element and the secondary coil element are arranged in a zigzag manner.

In the plate-type transformer (A) according to an embodiment of the present invention, the wire winding coil 110 and the substrate-type coil 120 are spaced apart from each other, and the first coil body of the secondary coil element 200 ( 210) and the second coil body 220, any one of the

coil bodies

210, 220 is disposed between the wire winding coil 110 and the substrate-type coil 120, so that the primary coil element 110 and the secondary coil The element 200 is characterized in that it is provided so as to be alternately arranged (zigzag) with respect to the vertical direction [vertical direction].

The "alternately arranged" means that one of the wire winding coil 110 and the substrate type coil 120 is provided between the first coil body 210 and the second coil body 220 facing each other, , The other means that the first coil body 210 is disposed on the upper surface or the lower surface of the second coil body 220.

For example, in the direction from top to bottom, the wire winding coil 110, the first coil body 210, the substrate type coil 120, and the second coil body 220 are arranged in the order (see FIGS. 5 to 12). ], or the first coil body 210, the wire winding coil 110, the second coil body 220, and the substrate-type coil 120 in that order.

According to the configuration in which the primary coil element 110 and the secondary coil element 200 are alternately arranged as described above, the generation of the loss magnetic field is remarkably reduced and the efficiency from the primary side to the secondary side is remarkably increased. There is this.

If the primary coil element is disposed between the upper and lower sides of the secondary coil element as in the prior art, the two sides of the secondary coil element (a total of four sides of the secondary coil element, that is, the upper and lower two sides and The primary coil is in contact with a total of two faces, one of the top and bottom of the bottom and one of the bottom of the top and one of the bottom of the bottom), but if the primary coil element and the secondary coil element are arranged in zigzag as above, three sides The primary coil cauterizer comes into contact with.

That is, as in the prior art, two surfaces are in contact with the middle of the secondary coil, and one surface is additionally in contact with the outer side of the upper or lower side of the secondary coil, so that a total of three surfaces are in contact.

In this way, when the three surfaces are in contact, the area of contact between the primary coil element and the secondary coil element is relatively increased, so that leakage can be further reduced and efficiency is improved.

The planar transformer (A) according to an embodiment of the present invention is formed on at least one of the first coil body 210 or the second coil body 220, so that the wire winding coil 110 and the substrate-type coil ( It is characterized in that it is configured to further include holding members (231, 232, 233, 234) for holding the 120).

The holding

members

231, 232, 233 and 234 are formed to protrude outward from one surface (for example, the upper surface or the lower surface) of the first coil body 210 and the second coil body 220, so that the wire winding coil 110 and the substrate coil 120 ).

The holding

members

231, 232, 233, 234 are formed to protrude from one surface (the upper surface in the illustrated example) to one of the upper or lower surfaces of the first coil body 210 in a vertical direction (for example, upward), so that there is no separation or gap. A first holding member (231, 232) for holding any one of the winding coil 110 and the substrate type coil 120, and a first holding member (231, 232) on one surface (for example, the upper surface) of the second coil body 220 The second holding member 233,234 for holding the other one of the wire winding coil 110 and the substrate-type coil 120 is formed to protrude in one (for example, upward) in the vertical direction, which is the same protruding direction as, so that there is no separation or gap. ) Characterized in that it is configured to include.

The

first holding members

231 and 232 for holding the wire winding coil 110 by protruding downward from the lower surface of the first coil body 210 and protruding downward from the lower surface of the second coil body 220 As a result, it may be composed of

lower holding members

233 and 234 for holding the substrate-type coil 120. This embodiment is the same as the case of turning the first and

second coil bodies

210 and 220 upside down. It goes without saying that it is included in the technical scope of the invention.

That is, when the wire winding coil 110 and the substrate-shaped coil 120 are positioned on the upper side of the first coil body 210 and the second coil body 220 and are alternately provided, they protrude upward from the upper surface. In the case where the wire winding coil 110 and the substrate-type coil 120 are positioned under the first coil body 210 and the second coil body 220 and are alternately provided, they protrude downward from the lower surface. It is formed, in any case, falls within the technical scope of the present invention.

The

first holding members

231 and 232 are formed to protrude from one surface (eg, upper surface 212b) of the first coil body 210 in a vertical direction (eg, upward), and through holes of the substrate-type coil 120 ( A first inner protrusion 231 that contacts the inner circumferential surface of 120a) to hold the inner circumferential surface of the substrate-type coil 120, and the first coil body 210 is spaced out from the first inner protrusion 231 in a horizontal direction ) Is formed protruding from one side (eg, upper surface 212b) in a vertical direction (eg, upward) in the same direction as the protruding direction of the first inner protrusion 231, and contacts the outer peripheral surface of the substrate-type coil 120 It is characterized in that it is configured to include a first outer protrusion 232 for holding the outer peripheral surface of the plate-shaped coil 120.

In addition, the

second holding members

233 and 234 are formed to protrude from one side (eg, upper surface 222b) of the second coil body 220 in a vertical direction (eg, upward), and the wire winding coil 110 A second inner protrusion 233 that contacts the inner circumferential surface 110a ′ of the central air core 110a to hold the inner circumferential surface 110a ′ of the central air core 110a of the wire winding coil 110, and the second inner protrusion ( One side of the second coil body 220 in the vertical direction, which is the same direction as the protruding direction of the first inner protrusion 231 from one side (eg, upper surface 222b) of the second coil body 220 by being spaced outward in the horizontal direction at 233 (eg, upward) And a second outer protrusion 234 that is formed to protrude and holds the outer peripheral surface 110b of the wire winding coil 110 by contacting the outer peripheral surface 110b of the wire winding coil 110.

In the flat-plate transformer (A) according to an embodiment of the present invention shown in FIGS. 7 to 11, the wire winding coil 110 is mounted on the upper surface 222b of the second coil body 220, and the An embodiment in which the substrate-type coil 120 is mounted on the upper surface 212b of the first coil body 210 is described, but the present invention is not limited thereto, and the wire winding coil 110 includes first inner and outer protrusions ( It is placed on the upper surface 212b of the first coil body 210 between 231 and 232, and the substrate-shaped coil 120 is the upper surface of the first coil body 210 between the second inner and

outer protrusions

233 and 234 It goes without saying that it belongs to the technical scope of the present invention even if it is placed in (212b).

The wire w of the main air core coil unit 111 is connected to the primary terminal pin P1 in order to be terminated inside the main air core coil unit 111 and connect to the primary terminal pin P1.

The wire (w) of the auxiliary air core coil unit 112 is terminated from the inside of the auxiliary air core coil unit 112 and is connected to the primary terminal pin (P1) is connected to the primary terminal pin (P1).

In addition, the second inner protrusion 233 has a passage slit for connecting the wire w of the main air core coil part 111 and the wire w of the auxiliary air core coil part 112 to the primary terminal pin P1. (261,262) are formed, and this wire (w) is inserted at the same time as passing through the through slits (261,262) and connected to the primary terminal pin (P1).

The through

slits

261 and 262 may be formed as a pair for inserting the wire w of the main air core coil unit 111 and the wire w of the auxiliary air core coil unit 112, respectively.

In addition, a primary terminal for installing a primary terminal pin P1 on any one of the first coil body 210 or the second coil body 220 (the second coil body 220 in the illustrated embodiment) Block 240 is formed, the primary terminal block 240 is provided with a primary terminal pin (P1) for connecting to the wire winding coil 110, the wire (w) of the wire winding coil 110 ) Is directly connected to the primary terminal pin (P1) so that the wire winding coil 110 and the primary terminal pin (P1) are electrically connected, and the primary terminal pin (P1) is connected to the primary terminal hole (124). It is inserted and characterized in that the substrate-type coil 110 and the primary terminal pin (P1) are electrically connected to each other.

The primary-side terminal block 240 is characterized in that a wire passage groove (240a) for passing the wire through the primary terminal pin (P1) to connect the wire (w) of the wire winding coil 110 is formed. do.

In addition, each of the first terminal (211a) of the first coil body and the second terminal (221a) of the second coil body are connected to the main PCB (not shown) of the finished product (eg, charger or adapter) on which the transformer is mounted. Of course, a secondary terminal pin (not shown) must be provided.

As shown in FIG. 13, in the flat plate transformer according to an embodiment of the present invention, a central hole 310a is formed and held by the first holding

members

231 and 232 so that the first coil body 210 It is characterized in that the top cover 310 coupled to the first coil body 210 to cover (cover) the wire winding coil 110 or the substrate-type coil 120 seated on one side of the top cover 310 is further included. .

According to this, the wire winding coil 110 or the substrate-type coil 120 can be charged in the space formed by the first inner protrusion 231, the first outer protrusion 232 and the upper cover 310, so that it is more stable. It can be implemented.

In addition, a first fastening protrusion 215 is formed on one surface of the first coil body 210, and a first fastening hole 310b fastened to the first fastening protrusion 215 in the upper cover 310 In this form, the upper cover 310 is coupled to one surface of the first coil body 210.

The method of fastening the upper cover 310 is not limited to the above configuration, and may be fastened by, for example, an adhesive method or a method by taping.

On the other hand, although not shown, in another embodiment, the first coil body 210 and the second coil body 220 are provided in close contact, and the upper surface of the first coil body 210 and the lower surface of the second coil body 220 There is an embodiment including a first coil element 110 and a second coil element 120, respectively.

In this case, the first connection part 211c is bent downward at one end of the first coil pattern part 211b and then bent back to form a U-shaped bend, and the second connection part 221c is After being bent upward at one end of the second coil pattern part 221b, it is bent back to form a U-shaped bend. The first connection part 211c that is U-bent downward and the U-bending upward 2 The connection part 221c is characterized in that it is U-bend so as not to overlap each other. Accordingly, there is an advantage in that the thickness of the secondary coil element 200 can be reduced.

In addition, in the case of another embodiment, the first connection part 211c is U-bent downward and then rearwardly bent diagonally, and the second connection part 221c is formed U-bending backward, so that the first connection part 211c and the second The connection part 221c is characterized in that it is formed so as not to overlap each other. Accordingly, there is an advantage of being able to manufacture the first connection part 211c and the second connection part 221c so that they do not overlap each other even in a small area.

And, for connecting the first coil body 210 and the second coil body 220 in series, that is, a bridge (Br) for connecting the first coil pattern part 212 and the second coil pattern part 222 in series. ) May be further included, and the first coil body 210 and the second coil body 220 are configured in series by the bridge (Br).

In the illustrated embodiment, the first coil body 210 and the second coil body 220 are connected by a bridge (Br) to be serially configured, but the present invention is not limited thereto. Even when the integral 210 and the second coil body 220 are configured in parallel without connection, they belong to the technical scope of the present invention.

As described above, preferred embodiments according to the present invention have been examined, and it is common knowledge in the relevant technical field that the present invention can be implemented in other specific forms without changing the technical spirit or essential features other than the above-described embodiments. It is self-evident to those who have. Therefore, it should be understood that the above-described embodiments are illustrative rather than restrictive.

The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

Claims

The first coil element 110 in the form of a flat plate,

A primary coil element for a plate-type transformer, characterized in that it comprises a second coil element 120 in a flat shape located in contact with the first coil element 110 or spaced apart from the first coil element 110 .
The method according to claim 1,

Any one of the first coil element 110 and the second coil element 120 has a central air core 110a formed in the center, and is formed by winding an insulating coated conductive wire in contact with each other to form a flat plate. It is composed of a winding coil 110,

The other one of the first coil element 110 and the second coil element 120 has a through hole 120a communicating with the central air core 110a, and a coil pattern layer in which a conductor pattern is formed in a spiral shape. A primary coil element for a flat-type transformer, characterized in that consisting of one or more substrate-type coils 120 formed on an insulating substrate.
The method according to claim 2,

The wire winding coil 110 is in contact with one surface of the substrate-type coil 120 and is supported on one surface of the substrate-type coil 120.
The method according to claim 2,

A central hole (130a) is formed in the center so as to communicate with the central air core (110a) of the wire winding coil (110) and the through hole (120a) of the substrate type coil (120), and contacts the substrate type coil (120). It is configured to further include a housing 130 that covers the wire winding coil 110 being supported,

The primary coil element for a flat-type transformer, characterized in that the wire winding coil (110) is embedded in an internal space formed by the housing (130) and the substrate-type coil (120).
The method of claim 4,

The housing 130,

The base portion 131 in which the central hole 130a is formed,

An outer guide 132 bent outside of the base part 131,

It is configured to include an inner guide 133 bent along the periphery of the central hole (Sb),

The primary side coil element 100 is provided in a seating space Sa formed by the base portion 131, the outer guide 132 and the inner guide 133,

The inner guide 215 contacts the inner peripheral surface 110a' of the central air core 110a of the wire winding coil 110 to hold the inner peripheral surface 100a' of the central air core 110a of the wire winding coil 110 , The outer guide 132 contacts the outer circumferential surface 110b of the wire winding coil 110 to hold the outer circumferential surface 110b of the wire winding coil 110, so that the wire winding coil 110 does not have a gap or flow. The primary coil element for a flat-type transformer, characterized in that provided in the seating space (Sa) of the housing (130).
The primary side coil element 100 according to claim 2,

A planar transformer comprising a secondary coil element 200 on a flat plate in which an induced current is generated by a current applied to the first coil element 110 and the second coil element 120.
The method of claim 6,

The secondary coil element 200,

The first coil body 210,

Consisting of including a second coil body 220 provided in contact with or spaced apart from the first coil body 210,

The first coil body 210,

A first coil pattern part 211b formed in a spiral pattern of a flat plate, and a first connection part 211c that is bent back and bent in a U shape after being bent at one end of the first coil pattern part 211b. , Excluding the first terminal 211a so that the first coil 211 consisting of a first terminal 211a formed at the end of the first connection part 211c, and a first central through hole 210a formed in the center It is configured to include a first insulating portion 212 made of a synthetic resin material containing the first coil 211,

The second coil body 220,

A second coil pattern part 221b formed in a spiral pattern of a flat plate, and a second connection part 221c that is bent in a U shape after being bent at one end of the second coil pattern part 221b and then bent back. , Excluding the second terminal 221a so that the second coil 221 consisting of a second terminal 221a formed at the end of the second connection part 221c, and a second central through hole 220a formed in the center A flat-panel transformer comprising a second insulating part 212 made of synthetic resin in which the second coil 221 is embedded.
The method of claim 7,

The wire winding coil 110 and the substrate-type coil 120 are spaced apart from each other,

Any one of the first coil body 210 and the second coil body 220 of the secondary coil element 200 is between the wire winding coil 110 and the substrate-type coil 120 And the primary coil element 110 and the secondary coil element 200 are arranged so as to be alternately arranged in the vertical direction.
The method of claim 8,

A holding member (231, 232, 233, 234) formed on at least one of the first coil body 210 or the second coil body 220 to hold the wire winding coil 110 and the substrate-type coil 120 is further included. Flat-plate transformer, characterized in that the configuration.
The method of claim 9,

The holding members 231,232,233,234,

To hold any one of the wire winding coil 110 and the substrate-type coil 120 so that it is formed to protrude from one of the upper or lower surfaces of the first coil body 210 in a vertical direction so that there is no separation or gap The first holding members 231 and 232,

The wire winding coil 110 and the substrate-type coil 120 are formed to protrude from one surface of the second coil body 220 in a vertical direction that is the same protruding direction as the first holding members 231 and 232 so that there is no separation or gap. ), a plate type transformer comprising a second holding member (233,234) for holding the other one.