KR102000249B1 - Secondary coil assembly for transformer and transformer using it - Google Patents

Abstract

The present invention relates to a primary coil element for a transformer. The primary coil element for a transformer comprises: a main air core coil unit (110) provided with a first air core (110a) formed on a center thereof, and formed by bringing insulation-coated copper wires into contact with each other to wind the copper wires in a flat shape; an upper shielding coil unit (141) which comes in contact with an upper surface of the main air core coil unit (110), has a first center hole (141a) formed on a center thereof to communicate with the first air core (110a), and is formed by bringing insulation-coated copper wires into contact with each other to wind the copper wires in a flat shape; a lower shielding coil unit (142) which comes in contact with a lower surface of the main air core coil unit (110), has a second center hole (142a) formed on a center thereof to communicate with the first air core (110a), and is formed by bringing insulation-coated copper wires into contact with each other to wind the copper wires in a flat shape; and an auxiliary coil unit (130) arranged in contact between the main air core coil unit (110) and the upper shielding coil unit (141) or arranged in contact between the main air core coil unit (110) and the lower shielding coil unit (142) to generate an inductive voltage by electromagnetic induction with the main air core coil unit (110) to output the inductive voltage. Accordingly, efficiency is improved, and product sizes can be reduced.

Description

TECHNICAL FIELD [0001] The present invention relates to a primary coil element for a transformer, and a primary coil element for a transformer,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer, and particularly to a primary coil element and a primary coil element transformer for a transformer suitable for improving the efficiency of a transformer and reducing a cost.

Generally, a transformer has a primary coil and a secondary coil. Generally, the primary coil is used as an input terminal and the secondary coil is used as an output terminal.

Small transformers used in mobile phone chargers, among transformers, use coils wound with triple insulated wires as coils (in particular, used as secondary coils).

However, there is a problem that a coil wound with a triple insulated wire has difficulty in mass production such as peeling a coating of a wire directly by a person, and there is a problem that a triple insulated wire is not wound uniformly and a defect rate is high. As a coil that solves some problems, there is a coil printed on a printed circuit board (PCB). Although this printed circuit board coil is easy to mass-produce, the current capacity is low due to a small area, There is a problem in that the dielectric strength is lower than that of a coil using a triple insulated wire.

To solve this problem, the proposed technique is disclosed in "Transformer ", No. 10-1579427 (Announcement: Dec. 22, 2015)).

No. 10-1579427 discloses a technology in which a secondary coil of a transformer is formed by insert molding of a metal press, and a PCB substrate on which coils are stacked is inserted between the pair of secondary coils.

However, the above-described conventional techniques have the following problems.

In the prior art, the primary side coil is formed of a PCB substrate and the PBC substrate is provided between the secondary side coils. In this case, the efficiency of the PCB substrate is not high and a leakage magnetic field is generated.

Document 1: Patent Registration No. 10-1579427 (public announcement date: December 22, 2012) Document 2: Published Japanese Patent Application No. 10-2016-0041837 (Publication Date: Apr. 18, 2016)

It is an object of the present invention to provide a primary coil element and a primary coil element integrated transformer for a transformer according to the present invention,

First, by implementing the primary coil device so that insulated coated copper wires are wound in a flat plate shape while contacting each other, unlike the conventional primary coil device of the PCB substrate type, the resistance is lowered and the heat generation is reduced The transmission efficiency to the secondary coil can be improved due to the skin effect in the copper wire,

Second, by making a primary coil element with a plate-like shape of an air core without using a bobbin, the size of the primary coil element itself can be reduced,

Thirdly, it is possible to narrow the gap between the coil parts so that the size of the product can be further reduced,

Fourthly, by providing a primary coil element for a transformer (hereinafter, simply referred to as a "primary coil") on a secondary coil element (simply referred to as a "secondary coil") itself, the distance between the primary coil and the secondary coil To be minimized,

Fifth, it is possible to improve the power transmission efficiency of the transformer by increasing the magnetic coupling force between the primary coil and the secondary coil by minimizing the interval between the primary coil and the secondary coil,

Sixth, by minimizing the distance between the primary coil and the secondary coil, it is possible to reduce the loss magnetic field and thereby improve the power transmission efficiency,

Seventh, a holding member is formed at a predetermined position that is center-aligned between the secondary coil and the primary coil, and the center coil can be aligned by inserting the primary coil into the holding member. It is possible to reduce the time required for the center aligning operation so that the center aligning workability can be improved,

Eighth, a configuration in which a holding member is formed at a predetermined position that is center-aligned between the secondary coil and the primary coil, and the primary coil is provided in the holding member, maximizes the magnetic induction efficiency, However,

Ninth, since the primary coil is charged in the secondary coil device, the leakage magnetic field can be minimized,

A holding member for holding the primary coil at the tenth coil element of the tenth secondary coil element is formed, and a second coil element of the secondary coil element serves as a secondary coil at the same time, The primary coil can be held and charged while the volume is minimized by a simple structure by using the former configuration,

(11), the first coil unit and the second coil unit are connected in series by a bridge, the second coil unit is U-shaped bent to form a secondary coil unit, and the primary coil is fixed To be charged,

It is possible to form the secondary coil element by the U-shaped bending of the twelfth and the second coils and to fix (hold) and charge the primary coil, thereby reducing the number of manufacturing steps and improving workability, Saving,

Since it is only necessary to insert the thirteenth coil element into the second coil body, a separate process for assembling the primary coil element is not necessary, so that the assembling workability of the primary coil element can be improved,

A holding member for holding the fourteenth coil and the fourteenth coil is formed at the same time as the secondary coil is formed, thereby shortening the manufacturing process and reducing the cost of the product,

It is not necessary to separately provide a terminal block or a coil mount for connecting the primary coil to the main board and a terminal block for connecting the primary coil is integrally formed on the secondary coil to reduce the volume of the product (Charger or power supply), thereby enabling miniaturization to the volume of the finished product,

Sixteenth, it is not necessary to separately provide a terminal block or a coil mount for connecting the primary coil to the main board, and a terminal block for connecting the primary coil is integrally formed on the secondary coil, Reduce assembly costs and thus reduce the cost of products,

The seventeenth coil pattern portion is connected in series by a bridge so that the number of windings can be reduced to half compared with the conventional one,

In the eighteenth, since the number of turns can be reduced to half compared with the conventional one, the width and the cross-sectional area of the coil can be widened to allow a large current to flow,

It is possible to reduce the height of the transformer product by making it possible to reduce the volume of the transformer by half, so that the charger or the case of the adapter and the separation distance can be further secured, the product heat can be improved, leakage magnetic flux, improve efficiency,

It is possible to maintain the uniformity of the resistance without changing the resistance value as a whole so that the electromagnetic characteristics such as the EMI characteristics are improved And a primary coil element for a transformer and a transformer integrated with a primary coil element, which are suitable for making the transformer suitable for the transformer.

In order to achieve the above object, the primary coil device for a transformer according to the present invention includes: a main coaxial coil part formed by centering a first coaxial core, An upper shielded coil portion provided in contact with an upper surface of the coil core portion to form a first central hole at the center so as to communicate with the first air core and formed by winding insulation coated coil wires in a plate form, A lower shielded coil portion provided in contact with a lower surface of the first shield and having a second central hole formed at the center thereof so as to communicate with the first air hole and formed by winding insulating coated copper wires in contact with each other to form a flat plate, Between the main shield core part and the upper shielded coil part, or in contact with the main shield core part and the lower shielded coil part, And an auxiliary coil part for generating an induced voltage by electromagnetic induction and outputting the induction voltage.

According to an aspect of the present invention, there is provided a primary coil element, a primary coil element, and a secondary coil having an induced electromotive force generated by an electromagnetic induction action of the primary coil element, And a coil element, wherein the primary coil element is charged in the secondary coil element.

The primary and secondary coil elements integral transformer of the present invention is characterized in that the secondary coil element has a first terminal and a first flat plate coil constituted by a first coil pattern portion extending from the first terminal and formed into a flat spiral pattern, And a first insulation part made of a synthetic resin material having a first central hole and a first flat coil coil excluding the first terminal, a second coil, and a second coil, A second plate-shaped coil formed of a second coil pattern portion formed of a flat spiral pattern, and a second insulation portion made of a synthetic resin material having a second central hole formed therein and including a second flat plate coil excluding the second terminal And a holding part for holding the primary coil element so that the primary coil element is fixed between the first coils and the second coils facing each other without deviations or clearances, And the primary coil device is installed in the first and second coil assemblies 210 and 220 while the position of the primary coil device is fixed by the holding member.

According to another aspect of the present invention, there is provided a method of manufacturing an integrated transformer comprising a first coil pattern portion in which a first terminal is disposed and a second coil pattern portion in which a first terminal is disposed, Forming a bridge between the first coil pattern part and the second coil pattern part so that the second coil pattern part and the bridge connecting the first coil pattern part and the second coil pattern part are on the same plane; Bending the first terminal into a U-shape with a bridge and U-shape bending the second terminal with a bridge; and inserting a synthetic resin material into the synthetic resin so that the first coil pattern portion and the second coil pattern portion are respectively embedded. 1 to form an insulating portion and a second insulating portion; an inner protrusion protruding from the inner surface of the first coil body to hold the inner circumferential surface of the primary coil element; A step of inserting a primary coil element in an insertion space formed by the primary coil, the inner protrusion and the outer protrusion, and a step of inserting the primary coil element into the insertion space formed by the primary coil, the inner protrusion and the outer protrusion, Bending the bridge so that the first insulating portion and the second insulating portion face each other; and charging the primary coil element with the second insulating portion covering the insertion space.

The method of manufacturing a transformer with integrated primary and secondary coils according to the present invention is characterized in that the formation of the first insulation part and the second insulation part and the formation of the inner protrusion and the outer protrusion are performed simultaneously.

The method for manufacturing a transformer with integrated primary and secondary coils according to the present invention is characterized in that the bridge is bent so that the first insulating portion and the second insulating portion face each other and the second insulating portion covers the primary coil element.

The method of manufacturing a transformer with integrated primary and secondary coils according to the present invention is characterized in that the step of forming the first and second insulating portions, the inner protrusions and the outer protrusions comprises the step of forming the first coil pattern portion and the second coil pattern portion, The first insulation portion, the second insulation portion, the inner protrusion and the outer protrusion are simultaneously formed by injecting the synthetic resin after the insert is inserted into the cavity.

A method of manufacturing a transformer with integrated primary and secondary coils according to the present invention is characterized in that the step of bending the bridge includes the steps of bending the primary coil element between the first coils and the second coils facing each other, Respectively.

The primary coil element and the primary coil element integral transformer of the present invention having the above-described configuration have the following effects.

First, by implementing the primary coil device so that insulated coated copper wires are wound in a flat plate shape while contacting each other, unlike the conventional primary coil device of the PCB substrate type, the resistance is lowered and the heat generation is reduced There is an effect that the transmission efficiency to the secondary coil can be improved due to the skin effect in the copper wire.

Second, there is an effect that the size of the primary coil element itself can be reduced by fabricating the primary coil element with a plate-like shape of the air core without using a bobbin.

Third, the space between the coil parts can be narrowed, so that the size of the product can be further miniaturized.

Fourth, by providing a primary coil element for a transformer (hereinafter simply referred to as a primary coil) in the secondary coil element itself, there is an effect that the interval between the primary coil and the secondary coil can be minimized.

Fifth, it is possible to improve the efficiency of the transformer by increasing the magnetic coupling force between the primary coil and the secondary coil by minimizing the distance between the primary coil and the secondary coil.

Sixth, it is possible to reduce the loss magnetic field by minimizing the distance between the primary side coil and the secondary side coil, and as a result, the efficiency of the transformer can be improved.

Seventh, a holding member is formed at a predetermined position that is center-aligned between the secondary coil and the primary coil, and the center coil can be aligned by inserting the primary coil into the holding member. It is possible to reduce the time required for the center aligning operation, thereby improving the center aligning workability.

Eighth, a holding member is formed at a predetermined position that is center-aligned between the secondary coil and the primary coil, and the primary coil is provided in the holding member, whereby the efficiency of the transformer can be increased, There is an effect that can be.

Ninthly, there is an effect that the leakage magnetic field can be minimized by providing the primary side coil in the secondary coil element.

A holding member for holding the primary coil at the tenth coil element of the tenth secondary coil element is formed, and a second coil element of the secondary coil element serves as a secondary coil at the same time, The primary coil can be held and charged while minimizing the volume with a simple structure by using the former configuration, by simultaneously performing the role of covering the charging member with the holding member.

(11), the first coil unit and the second coil unit are connected in series by a bridge, the second coil unit is U-shaped bent to form a secondary coil unit, and the primary coil is fixed There is an effect that can be charged.

It is possible to form the secondary coil element by the U-shaped bending of the twelfth and the second coils and to fix (hold) and charge the primary coil, thereby reducing the number of manufacturing steps and improving workability, There is an effect that can be saved.

Since it is only necessary to insert the thirteenth coil element into the second coil body, there is no need for a separate step for assembling the primary coil element, and the assembling workability of the primary coil element can be improved.

The holding member for holding the fourteenth coil and the fourteenth coil is formed at the same time as the secondary coil is formed, thereby shortening the manufacturing process and reducing the cost of the product.

It is not necessary to separately provide a terminal block or a coil mount for connecting the primary side coil to the main PCB board and the terminal block for connecting the primary side coil is integrally formed on the secondary side coil, So that it is possible to reduce the space for use in the finished product (charger or power supply device), and as a result, it is possible to miniaturize the product to a volume of the finished product.

It is not necessary to separately provide a terminal block or a coil mount for connecting the primary coil to the main PCB board and the terminal block for connecting the primary coil is integrally formed on the secondary coil so that the number of parts And the manufacturing cost can be reduced by reducing the number of assembling steps.

By forming the coil pattern portion by the bridge in the tenth and seventeenth, there is an effect that the number of windings can be reduced to half as compared with the conventional one.

The eighteenth aspect of the present invention is that the number of turns can be reduced to a half of that of the prior art, thereby increasing the width and cross-sectional area of the coils and allowing a large current to flow therethrough.

By reducing the number of turns by half, it is possible to lower the height of the transformer product, thereby further securing the case and spacing of the charger or adapter, improving the product heat generation, flux is reduced, and efficiency is improved.

By forming both the bridge and the first and second coil pattern portions to have the same thickness and width, there is no change in the resistance value as a whole, resistance uniformity can be maintained, and as a result, electromagnetic characteristics such as EMI characteristics can be improved There is an effect that can be.

1 is a perspective view of a primary coil element 100 for a transformer according to an embodiment of the present invention.
2 is a sectional view taken along line BB of Fig.
3 is an exploded perspective view of Fig.
4 is an operation diagram of inserting the primary coil element 100 in the primary coil element integrated transformer A according to the embodiment of the present invention.
5 is a cross-sectional view of the primary and secondary coil-integrated transformer A in a state where the primary coil element 100 is inserted.
6 is a perspective view of a secondary coil element 200 in a primary-coil element integrated transformer A according to an embodiment of the present invention.
FIG. 7 is a rear perspective view of FIG. 6. FIG.
8 is a cross-sectional view of a secondary coil element 200 in a primary-coil element-integrated transformer A according to an embodiment of the present invention.
Fig. 9 is a side view of Fig. 6. Fig.
10 is a perspective view of a primary coil element integrated transformer A according to an embodiment of the present invention, before the secondary coil element 200 is bending.
11A and 11B are process flow diagrams for forming the first and second pattern units 211b and 221b in the first and second coil element integrated transformer A according to the embodiment of the present invention. The first coil pattern portion 211b in which the first terminal 211a is located and the second coil pattern portion 221b and the bridge 230 in which the second terminal 221a is located are both on the same plane 11 (b) is a plan view of the first terminal 211a and the second terminal 221a in U-shape in a state where the bridge 230 is present in FIG. 11 (a) 11 (c) is a plan view of the bridge 230 bent in FIG. 11 (b).
12 is a perspective view of a modified embodiment of a first coil assembly 210 according to an embodiment of the present invention.
Fig. 13 is a process diagram of a method of manufacturing the primary coil element integral type transformer (A).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a primary coil element for a transformer and a primary coil element integral transformer according to the present invention will be described in detail with reference to the accompanying drawings.

The primary coil element 100 for a transformer according to an embodiment of the present invention includes a first core portion 110a formed at the center and a main core portion formed by winding insulated coated copper wires in a plate- A first center hole 141a is formed at the center so as to be in contact with the upper surface of the main air core unit 110 and communicated with the first air core 110a, And a second central hole 142a communicating with the first air hole 110a so as to be in contact with the lower surface of the main air hole core part 110. [ A lower shielded coil part 142 formed by winding insulating coated copper wires in contact with each other to form a plate shape to shield the electromagnetic wave interference phenomenon generated between the primary coil and the secondary coil, 110 and the top shielded coil part 141, Or an auxiliary coil provided in contact with the main air core unit 110 and the lower shield core unit 142 to generate and output an induced voltage by electromagnetic induction with the main air core unit 110, And a part (130).

As described above, since the primary coil element is realized to be wound in a plate shape so that the insulated copper wires contact each other, unlike the conventional primary coil element of the PCB substrate type, resistance is lowered, , And the skin effect on the copper wire leads to an improvement in the efficiency of transfer to the secondary coil.

For example, in the case of the primary coil element of the conventional PCB substrate type, the transmission efficiency was 86%, but in the case of the primary coil element 100 according to one embodiment of the present invention, it was 89 to 90%.

In addition, as described above, the size of the primary coil element itself can be reduced by fabricating the primary coil element in the form of a flat plate of the air core without using a bobbin.

The induced voltage output from the auxiliary coil part 130 may be used to drive an IC element or the like mounted on a main board (not shown).

In the primary coil device 100 for a transformer according to an embodiment of the present invention, the first coil element 100 is provided in contact with the main coil portion 110 and the upper coil portion 141, An upper insulating sheet 121 having a first through hole 121a communicating with the first air hole 130a and communicating with the first air hole 121a and a second air hole 121b communicating with the first air hole 130a, The upper insulating sheet 121 and the upper shielding coil portion 122 are formed at the center of the upper insulating sheet 121 and the lower insulating sheet 122. The upper insulating sheet 121 and the upper shielding coil portion 122 are formed on the lower insulating sheet 122, Or between the lower insulating sheet 122 and the lower shielding coil part 142 so as to generate an induced voltage by electromagnetic induction with the main coaxial coil part 110, And outputs the output signal.

According to this structure, the breakdown voltage is further increased to narrow the interval between the coil portions, and the size of the product can be further miniaturized.

1 to 3, the auxiliary coil part 130 is shown in contact with the upper insulating sheet 121 and the upper shielding coil part 141, for example.

In the primary coil element 100 for a transformer according to an embodiment of the present invention, the upper and lower insulation sheets 121 and 122 are insulation films made of a synthetic resin material.

Next, a transformer A using the primary coil element 100 for a transformer according to an embodiment of the present invention will be described.

The transformer A using the primary coil element 100 for a transformer according to an embodiment of the present invention is constructed such that the primary coil element 100 is embedded (charged) inside the secondary coil element 200, As a result that the coil element 100 and the secondary coil element 200 are integrally formed, the entirety of this specification will be referred to as "primary coil element integral transformer A ".

Here, the "primary coil element integral transformer A" may be referred to as "primary coil element built-in transformer A"

The primary and secondary coil element integrated transformer A according to the embodiment of the present invention generates an induced electromotive force by the electromagnetic induction action of the primary coil element 100 and the primary coil element 100 And a secondary coil element 200 in which an induction current is generated. The primary coil element 100 is charged in the secondary coil element 200.

The primary coil element 200 includes a first terminal 211a and a second terminal 211b extending from the first terminal 211a and connected to the first terminal 211a, And a first coil pattern part 211b formed of a first helical pattern and a first coil pattern part 211b formed in a helical spiral pattern and a second coil part 211b having a first central hole 210a, A first coil 210 formed of a synthetic resin material having a first coil pattern 211 and a first coil pattern 211b embedded in the first coil pattern 211b, And a second coil pattern 221a extending from the second terminal 221a and formed of a second helical pattern in a flat spiral pattern and a second center hole 220a And a second insulation part 222 of a synthetic resin material which contains a second flat plate coil 221 excluding the second terminal 221a (thus incorporating only the second coil pattern part 221b) And a second coil unit 220 composed of a first coil unit 220 and a second coil unit 220.

In the primary coil element integrated transformer (A) according to an embodiment of the present invention, the secondary coil element (200) includes a first coil element (100) Further comprising holding members (231, 232, 233, 234) for holding the primary coil element (100) so that the first coil element (100) and the second coil element The coil element 100 is installed in the first and second coils 210 and 220 in a state where the coil elements 100 are fixed by the holding members 231, 232, 233 and 234.

The holding members 231, 232, 233, and 234 may be referred to as a guider, a holder, or a positioner since the positions of the holding members 231, 232, 233, and 234 are accurately positioned at predetermined positions.

The first and second coils 210 and 220 may face each other when the first coil 210 and the second coil 220 face each other, Or the inner surface 220b of the second coil unit 220 (the first coil unit 210) (the surface facing the second coil unit 220) of the first coil unit 210, And the first coil element 100 is held on at least one of the inner surfaces 210b and 220b.

The holding members 231, 232, 233 and 234 may be arranged such that the primary coil element 100 is connected to the first and second coil pattern portions 211b and 221b The first coil element 100 is held at the same position as the first and second coil pattern portions 211b and 221b in the up-and-down direction so as to be center-aligned without being eccentric .

Specifically, for example, the holding members 231, 232, 233, and 234 protrude from the inner surface 210b of the first coil unit 210 toward the second coil unit 220, Inner protrusions 231 and 233 that come into contact with the inner circumferential surface 100a 'of the inner coil 100a and hold the inner circumferential surface 100a' of the central through hole 100a of the primary coil element 100, And is protruded toward the second coil unit 220 on the inner surface 210b of the first coil unit 210 so as to be in contact with the outer circumferential surface 100b of the primary coil unit 100, And outer protrusions 232 and 234 for holding the outer circumferential surface 100b of the base 100.

At this time, the primary coil element 100 is mounted on the inner surface 210b of the first coil unit 210, and is held between the inner protrusions 231 and 233 and the outer protrusions 232 and 234.

Preferably, the inner protrusions 231 and 233 are protruded along the first central hole 210a.

As shown in the figure, the inner protrusion 231 is protruded in a tee shape. Similarly, the outer protrusions 232 are protruded in a tee shape.

Alternatively, the inner protrusions 233 may be discretely formed at intervals, and similarly, the outer protrusions 234 may be discretely formed at intervals with a distance of 1 The present invention belongs to the technical scope of the present invention in any case as long as it holds the car coil element 100.

The inner protrusions 231 and 233 and the outer protrusions 232 and 234 are integrally formed with the first insulation portion 212. The first and second insulation portions 212 and 213 may be formed integrally with the first and second insulation portions 212 and 213, .

Preferably, the inner protrusions 231 and 233 and the outer protrusions 232 and 234 are formed integrally with the first insulation portion 212 by insert molding.

Accordingly, the inner protrusions 231 and 233, the outer protrusions 232 and 234, and the first insulation portion 212 can be simultaneously formed by one injection process.

In another embodiment, the inner protrusions 231 and 233 and the outer protrusions 232 and 234 may be adhered to the inner surface of the first insulation portion 212 by adhesive means. At this time, the adhesive means may be, for example, an adhesive, a double-sided tape or the like.

In the transformer A with integrated primary and secondary coil according to the embodiment of the present invention, the terminal block 240 having the plurality of terminal holes 240a is formed in the first insulation portion 212 . Preferably, the terminal block 240 is formed at the front end of the first insulation portion 212 as shown in FIG. A primary terminal pin P1 is provided in the terminal hole 240a and the primary terminal pin P1 is connected to the primary coil element 100. [

In the first and second coil element integral type transformer (A) according to the embodiment of the present invention, the second coil unit 220 includes a first coil unit 231 and a second coil unit 232 interposed between the inner protrusions 231 and 233 and the outer protrusions 232 and 234 And serves as a cover so as to cover the car coil element 100.

The second coil unit 220 may cover the primary coil element 100 inserted between the inner protrusions 231 and 233 and the outer protrusions 232 and 234 so as to be pressed.

The primary coil element 100 is installed in the insertion space S1 formed by the first coil unit 210, the inner protrusions 231 and 233, the outer protrusions 232 and 234, and the second coil unit 220.

More preferably, the second coil 220 presses the primary coil element 100 to prevent clearance or flow of the primary coil element 100.

Although the holding members 231, 232, 233 and 234 are formed on the first coil unit 210 in the above embodiment, the holding members 231, 232, 233 and 234 may be formed on the second coil unit 220 Or may be formed simultaneously in the first coil unit 210 and the second coil unit 220, and it goes without saying that the scope of the present invention belongs to the technical scope of the present invention in any case.

In the first and second coil element integrated transformer (A) according to an embodiment of the present invention, the first insulation portion 212 is formed by inserting the first flat plate type coil 211 into an injection mold, And the second insulation portion 222 is formed by insert molding by resin injection after inserting the second flat plate type coil 221 into the injection mold.

In the first and second coil element integrated transformer A according to the embodiment of the present invention, the first insulation part 212 and the second insulation part 222 are formed by the first and second flat coil- 2 flat plate type coil 211 is inserted into an injection mold and is then formed by insert molding by resin injection.

More preferably, the first and second insulating portions 212 and 222 are simultaneously formed by insert injection molding.

Next, the configuration and operation of the primary coil element integral transformer A according to another embodiment of the present invention will be described.

In the transformer (A) integrated with a primary coil element according to another embodiment of the present invention, a bridge 250 connecting the first and second flat plate-type coils 211 and 221 in series .

One end of the bridge 250 is connected to the first coil pattern part 211b and the other end of the bridge 250 is connected to the second coil pattern part 221b so that the first coil pattern part 211b and the second coil pattern part And the bridge 250 is bent so that the first coil unit 210 and the second coil unit 220 face each other.

As described above, by connecting the first coil pattern portion 211b and the second coil pattern portion 221b in series by the bridge 250, the number of windings is reduced to half compared with the conventional case. For example, in the case of the present invention, two winding turns are sufficient if the winding is four winding turns.

As the number of windings is reduced to half as described above, there is an advantage that the width of the coil pattern portions 211b and 221b is increased and the cross-sectional area is widened to increase the magnitude of the current flowing under the condition that the width is fixed.

In addition, since the number of windings is reduced to half, the height of the first and second coils 210 and 220 is reduced. This is because, since the number of windings is reduced by half, the thickness of the winding can be made thinner by making it wider in manufacturing, and even if the thickness becomes thinner, the width can be widened so that the same amount of current can be passed as in the conventional case. Even if the same current is flown as described above, since the thickness is thinned, there is an advantage that the height is lowered.

If the height is lowered, the height of the transformer can be lowered, so that it is possible to secure the distance between the case and the case of the charger or the adapter, to improve the product heat generation, to reduce the leakage magnetic flux, There is an advantage.

According to the configuration of the bridge 250 as described above, the primary coil element 100 can be easily assembled and the assembly workability of the primary coil element 100 can be improved.

Further, since there is no need for center alignment for the pair of first and second coils 210 and 220, the time required for the center alignment operation can be reduced, thereby improving center alignment workability.

Conventionally, upper and lower sides should be separated and assembled, but there is an advantage that work for dividing upper and lower sides is not necessary.

In the first and second coil element integrated type transformer (A) according to another embodiment of the present invention, the bridge 250 is disposed between the first coil unit 210 and the second coil unit 220 facing each other And the primary coil elements 100 are formed at two positions inwardly.

The first and second coil pattern units 211b and 221b and the bridge 250 are simultaneously formed in the first and second coil element integrated transformer A according to another embodiment of the present invention.

According to this, the productivity of the product is improved. In addition, since the first and second coil pattern portions 211b and 221b and the bridge 250 are formed at the same time, there is an advantage in that a center alignment is not required for the pair of first and second coils 210 and 220 . In addition, there is an advantage in that it is not necessary to divide the upper and lower sides so that the mechanical work can be easily performed

The first and second coil pattern portions 211b and 221b may be formed to have the same thickness and width as the first and second coil pattern portions 211b and 221b of the first and second coil element integrated type transformers A and B according to another embodiment of the present invention. And are integrally formed at the same time.

According to this, there is no change in the resistance value as a whole, resistance uniformity can be maintained, and as a result, there is an advantage that the electromagnetic characteristics, such as EMI characteristics, are improved.

In the transformer (A) including the first and second coil elements according to another embodiment of the present invention, the bridge 250 is formed in a direction of a width w1 of the first coil pattern portion 211b, The first terminal 211a and the second terminal 221a are formed on the opposite sides of the bridge 250 with respect to the width w2 of the first terminal 221a and the second terminal 221a.

The first terminal 211a of the first coil pattern integral portion transformer A may be connected to the first coil pattern portion 211b so as not to be in contact with the first coil pattern portion 211b, And the second terminal 221a is bent in the backward direction after being bent downward in the first coil pattern 211b (the opposite direction to the side where the second coil unit 220 is present) (In the direction opposite to the side where the first coils 210 are present) in the second coil pattern portion 221b so as not to be bent, and then bent backward.

It is preferable that a folding line (not shown) is formed at two places for bending the bridge 250, for example, by a notching mold or the like.

In order to securely fix the primary coil element 100 inserted between the first and second coils 210 and 220 in the first-order coil element integrated transformer A according to another embodiment of the present invention, And locking members 215 and 225 for coupling the first coil unit 210 and the second coil unit 220 to each other.

According to such a configuration of the locking member, there is an advantage that the primary coil element 100 loaded in the insertion space S1 can be firmly fixed even though it can not come out.

On the other hand, when the bridge 250 is additionally constructed, according to the configuration of the locking members 215 and 225, the first and second coils 210 and 220 can also maintain the bent state.

And the locking member is detachably fitted.

The locking member is formed at one side of the first coil unit 210 so as to be removably fitted into the fitting groove 225. The locking member 225 is formed at one side of the second coil unit 220, And a fitting projection (215).

Although it is illustrated in the drawing that the fitting groove 225 is formed in the second coil unit 220 and the fitting protrusion 215 is formed in the first coil unit 210, And the case where the fitting groove 225 is formed in the first coin body 210 and the fitting projection 215 is formed in the second coin body 220 is also within the technical scope of the present invention Of course.

In the drawing, the fitting groove 225 is formed at the rear end of the second coil unit 220 and the fitting protrusion 215 is formed at the rear end of the first coil unit 210, for example, In other words, the fitting groove 225 is formed at the front end of the second coil unit 220, and the fitting protrusion 215 is formed at the front end of the first coil unit 210 Of course, fall within the technical scope of the present invention.

Next, a (used) transformer A having the above-described first-order coil element integral type transformer A will be described.

The primary and secondary coil integral transformer A according to an embodiment of the present invention includes the primary coil element integral transformer A and the primary coil 210 and the internal projections 231 and 233, And a primary coil element 100 provided in the insertion space S1 formed by the outer projections 232 and 234 and the second coil unit 220. [

In the primary and secondary coil integrated transformer A according to the embodiment of the present invention, a plurality of (for example, two or more) primary windings 240, which are provided in the terminal holes 240a of the terminal block 240 and are connected to the primary coil elements 100, And a primary side terminal pin (P1) of the secondary side terminal.

A method of fabricating a transformer integrated with primary and secondary coils according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

First, a conductive base material is prepared. The conductive base material may be a thin sheet-like copper plate.

Next, punching (S310, S312) of the conductive base material by the press die is performed to form the first and second coil pattern portions 211b and 221b and the bridge 250, which will be described in detail.

The first coil pattern portion 211b in which the first terminal 211a is located and the second coil pattern portion 221b in which the second terminal 221a is located are formed by punching the conductive base material with the press die, The first and second coil pattern portions 211b and 221b and the bridge 250 are connected to each other so that the bridges 250 connecting the first coil pattern portion 211b and the second coil pattern portion 221b are all on the same plane. (S310).

The first terminal 211a is U-shaped bent toward the bridge 250 and the second terminal 221a is U-bent toward the bridge 250 (S312).

Next, a first insulation part 212 and a second insulation part 222 made of synthetic resin are formed so that the first coil pattern part 211b and the second coil pattern part 221b are respectively embedded (S314).

An inner protrusion 231 protruding from the inner surface 210b of the first coil unit 210 along the first central hole 210a for holding the inner circumferential surface 100a of the primary coil element 100, An outer protrusion 232 protruding from the inner surface of the first coil unit 210 is formed outwardly from the inner protrusions 231 and 233 to hold the outer circumferential surface 100b of the coil coil element 100 (S316)

The step S314 of forming the first insulation part 212 and the second insulation part 222 and the step S316 of forming the inner protrusion 231 and the outer protrusion 232 may be carried out either visually But may be performed at the same time.

That is, the formation of the first insulation part 212 and the second insulation part 222 and the formation of the inner protrusions 231, 233 and the outer protrusions 232, 234 are performed at the same time. More preferably, The first insulation part 212, the second insulation part 222 and the inner protrusions 231 and 233 are formed by injecting the synthetic resin after inserting the pattern part 211b and the second coil pattern part 221b into the cavities of the injection mold, And outer protrusions 232 and 234 are simultaneously formed.

Next, the inner circumferential surface 100a 'of the primary coil element 100 is brought into contact with the inner protrusions 231 and 233 so that the outer circumferential surface 100b of the primary coil element 100 contacts the outer protrusions 232 and 234, The primary coil element 100 is inserted into the insertion space S1 formed by the coil element 100, the inner projections 231 and 233 and the outer projections 232 and 234 (S318).

The bridge 250 is bent so that the first insulation part 212 and the second insulation part 222 face each other at step S320 and then the second insulation part 222 is inserted into the insertion space S1 (S322) in which the primary coil element 100 is charged is carried out.

The above steps S320 and S322 are continuously performed so that the bridge 250 is bent so that the first insulation part 212 and the second insulation part 222 face each other and the second insulation part 222 ) Covers the primary coil element 100.

The step (S318) of bending the bridge 250 may be performed such that the primary coil element 100 is inserted between the first coil unit 210 and the second coil unit 220 facing each other It is preferable to bend inwardly at two places.

In the illustrated example, the secondary coil element 200 is described as a series coil element in which the first coil unit 210 and the second coil unit 220 are connected in series by the bridge 250, It is needless to say that the first coil unit 210 and the second coil unit 220 are not connected to each other by the bridge 250 and are connected to the main substrate of the finished product separately, It goes without saying that the present invention is also included in the technical scope of the present invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the appended claims. It is obvious 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 defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and range of the claims and their equivalents should be construed as being included in the scope of the present invention.

100: primary coil element for transformer according to one embodiment of the present invention
100a: central hole of the primary coil element
100a ': inner circumferential surface of the primary coil element 100b: outer circumferential surface of the primary coil element
110: main air core part 110a: first air core
121: upper insulating sheet 121a: first through hole
122: lower insulating sheet 122a: second through hole
130: auxiliary coil part 130a: second eccentric
141: upper shielded coil part 141a: first central hole
142: lower shielded coil part 142a: second central hole
A: According to an embodiment of the present invention, the primary coil element integral transformer
200: secondary coil element
210: first coil assembly 211: first flat plate coil
211a: first terminal 211b: first coil pattern portion
w1: width of the first coil pattern portion 210a:
210b: inner surface of the first coin body 212:
215:
220: second coil unit 221: second flat plate coil
221a: second terminal 221b: second coil pattern portion
w2: width of the second coil pattern portion 220a:
220b: inner surface of the second coil unit 222:
225: Fitting groove
231, 233:
232, 234: Outer projection S1: Insertion space
240: Terminal block 240a: Terminal block
250: Bridge
P1: Primary terminal pin

Claims (5)

A main coaxial core part 110 formed at the center of the first coaxial core 110a and formed by winding insulated coated copper wires into a plate shape,
A first center hole 141a is formed in the center so as to be in contact with the upper surface of the main air core unit 110 and communicated with the first air core 110a, An upper shielding coil part 141 formed by the upper shielding coil part 141,
A second center hole 142a is formed in the center so as to be in contact with the lower surface of the main air core unit 110 and communicated with the first air core 110a, A lower shielding coil portion 142 formed by the lower shielding coil portion 142,
The main air core unit 110 is provided in contact with the main air core unit 110 and the upper side shield core unit 141 or is in contact with the main air core unit 110 and the lower shield core unit 142, And an auxiliary coil part (130) for generating and outputting an induction voltage by electromagnetic induction with the part (110).
The method according to claim 1,
An upper insulating sheet 121 provided in contact with the main air core unit 110 and the upper shielding coil unit 141 and having a first through hole 121a communicating with the first air core 110a, Wow,
A lower insulating sheet 122 which is provided in contact with the main air core unit 110 and the lower shield core unit 142 and has a second through hole 122a communicating with the first air core 110a, And further comprises:
The auxiliary coil part 130 is provided in contact with the upper insulating sheet 121 and the upper shielded coil part 141 or between the lower insulating sheet 122 and the lower shielded coil part 142 , And generates and outputs an induced voltage by electromagnetic induction with the main co-axial coil part (110).
The method of claim 2,
Characterized in that the upper and lower insulation sheets (121, 122) are insulation films of a synthetic resin material.
A primary coil element (100) according to any one of claims 1 to 3,
And a secondary coil element (200) generating an induced electromotive force by electromagnetic induction with the primary coil element (100) to generate an induced current,
Wherein the primary coil element (100) is charged in the secondary coil element (200).
The method of claim 4,
The secondary coil element (200)
A first flat plate type coil 211 formed of a first terminal 211a and a first coil pattern portion 211b extending from the first terminal 211a and formed in a flat spiral pattern, A first coil 210 formed of a synthetic resin material and having a first plate 211a and a first plate 211c except for the first terminal 211a,
A second flat plate type coil 221 constituted by a second terminal 221a and a second coil pattern portion 221b extending from the second terminal 221a and formed in a flat spiral pattern, A second coil unit 220 formed of a synthetic resin material and including a second flat plate coil 221 except for the second terminal 221a,
The primary coil element 100 is held such that the primary coil element 100 is fixed between the first coil element 210 and the second coil element 220 facing each other without deviations or clearances The holding member 231, 232, 233, 234,
Wherein the primary coil element (100) is installed in the first and second coils (210, 220) while the position is fixed by holding members (231, 232, 233, 234).

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