KR102383092B1 - A transformer - Google Patents

Abstract

The present invention relates to a transformer for a charger. According to the present invention, induction of the secondary-side first coil element 110 , the secondary-side second coil element 120 , and the secondary-side first and second coil elements 110 and 120 . A primary side coil element 10 for generating a current, a plurality of primary side terminal blocks 117 and 117' to which the primary side terminal pin P1 is fastened, and a secondary side first in which the primary side coil element 10 is charged, 2 A bottom portion 211 on which the coil elements 110 and 120 are mounted, a rear wall 212 formed vertically from the bottom portion 211 to hold the rear of the secondary side coil elements 110 and 120, and a bottom portion 211 The secondary side terminal block provided with the base 210 and the secondary side terminal pin P2 are formed vertically in the base 210 including the first side wall 213 to hold one side of the secondary side coil elements 110 and 120, 220 and the connector cover 230 for increasing the distance for insulation between the connector of the charger and the magnetic cores 21 and 22 by being integrally formed with the first side wall 213 and having a connector insertion space 230a ) and a lower insulating film 250 protruding downward from the lower surface of the bottom part 211 to insulate the primary circuit part and the secondary circuit part of the charger, and according to this, it is possible to improve the insulation characteristics There is an advantage.

Description

Transformer {A TRANSFORMER}

The present invention relates to a transformer, and more particularly, to a transformer for a charger suitable for improving insulation properties.

BACKGROUND ART In general, a transformer is a device for increasing or decreasing an AC voltage by using an electromagnetic mutual induction action, and includes a primary side coil, a secondary side coil, and a magnetic core (magnetic core).

On the other hand, in the case of adjoining a planar secondary coil to a planar primary coil constituting a transformer, it is necessary to firmly position the secondary coil in the molding using insert injection, etc. so that the transformer operates stably. there is.

Related prior art literature information: Registered Patent No. 10-0366241 (published on December 31, 2002) "Thin-film planar transformer" is known.

And, the technology proposed to improve the poor operating characteristics, which is a problem of the "thin film planar transformer" disclosed in No. 10-0366241, is a "transformer" by registration No. 10-1579427 (announcement date: December 22, 2015). is known

The "Transformer" according to the registration number 10-1579427 (announcement date: December 22, 2015) has a primary coil on both sides of a double-sided printed circuit board, and a lower secondary coil is inserted on the bottom of the double-sided printed circuit board. To provide a transformer for adjoining the lower secondary coil molding fixed therein by injection and adjoining the upper secondary coil molding in which the upper secondary coil is fixed inside by insert injection on the upper surface of a double-sided printed circuit board is doing

And, when the "transformer" according to the registration number 10-1579427 (announcement date: December 22, 2015) is finally provided in a charger or adapter, which is a finished product, a bobbin to be mounted on the main PCB of the charger or adapter. Alternatively, it is mounted using a terminal mount.

These bobbins [terminal mounts] are provided so as to wrap all magnetic cores (magnetic cores) and are mounted on the main PCB.

However, the "transformer" by 10-1579427 (announcement date: December 22, 2015) according to the prior art as described above had the following problems.

In the case of mounting on the main PCB of the finished product (charger, adapter) while using a bobbin [terminal mount] to cover both the magnetic core and the primary and secondary coil moldings, the insulation characteristic deteriorates due to the problem of insulation with the connector of the finished product. there was a problem with

Document 1: Registered Patent Publication No. 10-1579427 (Announcement date: 2015.12.22.) Document 2: Registered Patent Publication No. 10-1655970 (Announcement date: 2016.09.08.)

The present invention was created to solve the problems of the prior art as described above, and the purpose of the transformer according to the present invention is,

First, by adopting a connector cover, it is possible to solve the insulation problem between the metal connector of the charger and the transformer,

Second, by integrally forming the connector cover on the base, it is possible to reduce the space occupied by the charger, which is a finished product, so that it can be miniaturized, and it is possible to reduce the manufacturing cost of the product by reducing assembly man-hours and improving productivity,

Third, by adopting the upper insulating film, the insulation between the connector of the charger, which is a finished product, and the transformer (A) can be made more reliable,

Fourth, by integrally forming the lower insulating film, it is possible to insulate the primary circuit part and the secondary circuit part of the charger, which is a finished product, and thus to provide a transformer suitable for improving the insulation characteristics of the charger, which is a finished product. .

The transformer of the present invention for achieving the above object includes a first terminal and a first flat coil consisting of a first coil pattern portion extending from the first terminal and formed in a flat spiral pattern, and a first central hole a secondary-side first coil element formed of a first insulating part made of synthetic resin and having a first flat coil except for the first terminal; A second flat coil comprising a second terminal, a second coil pattern portion extending from the second terminal to form a flat spiral pattern, and a second flat coil having a second central hole and excluding the second terminal a secondary-side second coil element comprising a second insulating part made of a synthetic resin material for embedding a coil; a primary-side coil element inserted between the secondary-side first coil element and the secondary-side second coil element and configured to generate an induced current in the secondary-side first and second coil elements; a plurality of primary terminal blocks formed integrally with the first insulating part at the front end of the first insulating part and to which primary terminal pins are fastened; a plurality of primary-side terminal pins coupled to the primary-side terminal block and connected to the primary-side coil element; A terminal through hole through which the plurality of primary side terminal pins pass is formed at the front end, and a plate-shaped bottom portion on which the first and second secondary side coil elements in which the primary side coil elements are charged are placed, and the rear end of the bottom portion vertical A first first that is formed of a through hole through which the secondary side coil element passes, a rear wall that holds the rear of the secondary side coil element, and is vertically formed on one side of the bottom part to hold one side of the secondary side coil element a base configured to include a side wall to mount the secondary-side first and second coil elements in which the primary-side coil elements are loaded; a secondary terminal block formed at the rear end of the bottom and provided with a plurality of secondary terminal pins; A connector cover for increasing the distance for insulation between the connector of the charger and the magnetic core by covering the connector of the charger as it is integrally formed on the first side wall and has a connector insertion space into which the connector of the charger, which is a finished product, is inserted ; and a lower insulating film protruding downward from the lower surface of the bottom part to insulate the primary circuit part and the secondary circuit part of the charger, which is a finished product.

The transformer of the present invention having the above configuration has the following effects.

First, by adopting a connector cover, there is an effect that can solve the insulation problem between the metal connector of the charger and the transformer.

Second, by integrally forming the connector cover on the base, there is an effect of reducing the space occupied by the charger, which is a finished product, and thus can be miniaturized. there is

Third, by the adoption of the upper insulating film, there is an effect that can make the insulation between the transformer and the connector of the charger, which is a finished product, more reliable.

Fourth, by integrally forming the lower insulating film, it is possible to insulate the primary circuit part and the secondary circuit part of the charger, which is a finished product, and as a result, there is an effect that can improve the insulation characteristics of the charger, which is a finished product.

1 is a front perspective view of a transformer (A) according to an embodiment of the present invention.
FIG. 2 is a rear perspective view of FIG. 1 ;
3 is an exploded perspective view of FIG. 2 ;
4 is an exploded perspective view of FIG. 1 ;
5 is an exploded perspective view of the primary side coil element 10 in the transformer (A) according to an embodiment of the present invention.
6 is a perspective view of the first and second plate-type coils 111 and 121 molded into the secondary-side first and second coil elements 110 and 120 in the transformer A according to an embodiment of the present invention.
FIG. 7 is a front view of FIG. 1 ;
FIG. 8 is a rear view of FIG. 1 ;
FIG. 9 is a left side view of FIG. 1 ;
FIG. 10 is a right side view of FIG. 1 ;
11 is a plan view of FIG. 1 ;
12 is a bottom view of FIG. 1 ;

Hereinafter, a preferred embodiment of the present invention of the transformer will be described in detail with reference to the accompanying drawings.

A transformer according to an embodiment of the present invention relates to a small transformer for a charger and an adapter used in a charger or adapter of a portable terminal.

The transformer A according to an embodiment of the present invention includes a first terminal 111a and a first coil pattern portion 111b extending from the first terminal 111a and formed in a planar spiral pattern. A first insulating part 112 made of synthetic resin in which a first flat coil 111 and a first central hole 110a are formed and a first flat coil 111 excluding the first terminal 111a is built in. ) of the secondary-side first coil element 110 consisting of; A second flat coil 121 comprising a second terminal 121a, a second coil pattern portion 121b extending from the second terminal 121a and formed in a flat spiral pattern, and a second central hole a secondary-side second coil element 120 having a second insulating portion 122 formed of a synthetic resin material having a second flat coil 121 excluding the second terminal 121a and having a 120a formed therein; A primary-side coil element ( 10); a plurality of primary terminal blocks 117 and 117' formed integrally with the first insulating part 112 at the front end of the first insulating part 112 and to which the primary terminal pins P1 are fastened; a plurality of, for example, four primary terminal pins (P1) coupled to the primary side terminal blocks (117, 117') and connected to the primary side coil element (10); A terminal through hole 211a through which the plurality of primary side terminal pins P1 passes is formed at the front end, and the secondary side first and second coil elements 110 and 120 in which the primary side coil element 10 is loaded are mounted. A plate-shaped bottom part 211 is formed vertically at the rear end of the bottom part 211, and a through hole 212a through which the rear side of the secondary side coil elements 110 and 120 passes is formed, and the secondary side coil element ( The rear wall 212 for holding the rear of 110 and 120, and the second side (eg, the right side) of the secondary side coil elements 110 and 120 formed vertically from one side (eg, the right side) of the bottom part 211 to hold the first side (eg, the right side) The first side wall 213 and the second side wall (eg, the left side) formed vertically on the other side (eg, the left side) of the bottom part 211 to hold the other side (eg, the left side) of the secondary side coil elements 110 and 120 ( a base 210 for mounting the secondary-side first and second coil elements 110 and 120 in which the primary-side coil element 10 is charged by including 214; a secondary terminal block 220 formed at the rear end of the bottom portion 211 and provided with a plurality of (eg, two) secondary terminal pins P2; In the finished product (eg, charger) on which the transformer A is mounted, the primary circuit and the secondary circuit are insulated from each other, and this insulation must be kept within a set distance (safety distance) to limit the effect to the maximum. It is integrally formed on the side wall 213, and a connector insertion space 230a into which a connector (not shown) (eg, a USB connector) of a charger (not shown), which is a finished product, is inserted, is formed inside the charger (not shown). A connector cover 230 made of a synthetic resin material for increasing the distance for insulation between the connector of the charger and the magnetic cores 21 and 22 by covering a connector (not shown) (eg, a USB connector); and a lower insulating film 250 protruding downward from the lower surface of the bottom part 211 to insulate the primary circuit part and the secondary circuit part of the charger, which is a finished product.

As described above, by adopting the connector cover 230, there is an advantage that can solve the insulation problem between the metal connector of the charger and the transformer.

In addition, since the connector cover is integrally formed with the base, it is possible to reduce the space occupied by the charger, which is a finished product, and thus can be miniaturized.

And, by integrally forming the lower insulating film, it is possible to insulate the primary circuit part and the secondary circuit part of the charger, which is a finished product, and as a result, there is an advantage in that the insulation characteristics of the charger, which is a finished product, can be improved.

In the transformer (A) according to an embodiment of the present invention, the connector cover 230 is integrally protruded from the outer surface of the first side wall 213 to be perpendicular to the horizontal direction, and is a connector of a finished product. A loop ( 233), a connector insertion space 230a is formed by the left and right cover parts 231,232 and the loop 233, and the first side wall 213 is higher than the loop 233. It is characterized in that the left and right cover parts 231,232 and the loop 233 are integrally formed on the first side wall 213 to be high.

In the transformer (A) according to an embodiment of the present invention, it is formed in the horizontal direction on the outer surface of the first side wall 213, upward from the loop 233 at the position of the right cover part 232 The first upper insulating film 241 that is formed to protrude and insulates between the transformer A and the connector of the charger, which is a finished product, and the first upper insulating film 241, facing the first upper insulating film 241, and the left cover part of the connector cover 230 ( 231), a second upper insulating film 242 formed by bending vertically at the front end of the first side wall 213 to insulate the transformer A from the connector of the charger, which is a finished product, and the second upper insulating film It is characterized in that the third upper insulating film 243 is further included to insulate between the transformer (A) and the connector of the charger which is a finished product by being vertically bent forward in 242 .

According to this, there is an advantage in that the insulation between the connector and the transformer (A) of the charger, which is a finished product, can be further reliably ensured.

In the transformer (A) according to an embodiment of the present invention, the lower insulating film 250,

Strictly at the boundary between the connector cover 230 and the bottom 211, the first side wall 213 is formed to protrude downward from the position of the connector cover 230 and the bottom part 211, and the product insulates the primary circuit part and the secondary circuit part of the charger, which is a finished product. 1 A lower insulating film 251, a lower inclined insulating film 252 bent at an angle from the first lower insulating film 251 to protrude downward to insulate the primary circuit part and the secondary circuit part of the finished charger; A second lower insulating film formed integrally with the second upper insulating film 242 so as to escape from the bottom portion 211 and coincide with the second upper insulating film 242 at the same time to insulate the primary circuit part and the secondary circuit part of the charger as a finished product. 253 and the second lower insulating film 253 are vertically bent forward and are integrally formed on the third upper insulating film 243 to coincide with the third upper insulating film 243, so that the primary circuit part of the charger as a finished product and a third lower insulating film 254 that insulates the secondary-side circuit unit.

In the transformer (A) according to an embodiment of the present invention, the primary side coil element 10 has a first air core 11a formed in the center and is formed in a flat plate shape by contacting insulating coated conductive wires with each other. The main air core coil unit 11 formed by winding, and the second air core 13a provided above or below the main air core coil unit 11 and communicated with the first air core 11a of the main air core coil unit 11 ) is formed in the center, and is formed by winding an insulating-coated conductive wire in contact with each other in a flat plate shape, and generating and outputting an induced voltage by electromagnetic induction with the main air-core coil unit ( 11 ). 13) is characterized in that it is configured to include.

As described above, the size of the primary coil element 10 can be reduced by implementing the insulation-coated copper wire to be wound in a flat plate shape so as to be in contact with each other.

In addition, the induced voltage output from the auxiliary coil unit 13 may be used to drive an IC device mounted on a main board (not shown) of the finished product.

In the transformer (A) according to an embodiment of the present invention, it is provided in contact with the main air core coil unit 11, and the center holes 14a and 14'a are formed to communicate with the first air core 11a, It is characterized in that it is formed in a flat plate shape and further includes conductive shielding members 14 and 14' for shielding EMI.

The shielding members 14 and 14' are provided in contact with the upper surface of the main air core coil unit 11, and a central hole 14a is formed in the center to communicate with the first air core 11a, and has a flat plate shape. A conductive upper shielding member 14 for shielding EMI and provided in contact with the lower surface of the main air-core coil unit 11, and a central hole 14'a to communicate with the first air-core 11a. It is formed in the center and is formed in a flat plate shape and is composed of a conductive lower shielding member 14' that shields EMI, and the auxiliary coil part 13 includes the main air-core coil part 11 and the upper shielding member. It is characterized in that it is provided in contact between or provided in contact between the main air-core coil unit 11 and the lower shielding member to generate and output an induced voltage by electromagnetic induction with the main air-core coil unit 11 .

The upper shielding member 14 is provided in contact with the upper surface of the main air core coil unit 11, and a first central hole 14a is formed in the center to communicate with the first air core 11a, and is coated with insulation. It is an upper shielding coil part 14 that shields EMI formed by winding wires in contact with each other in a flat shape, and the lower shielding member 14' is provided in contact with the lower surface of the main air-core coil part 11, A second central hole 142a is formed in the center to communicate with the first air core 11a, and the lower shielding coil unit 14' shields EMI formed by winding insulated wires in contact with each other to form a flat plate. ) is characterized as

On the other hand, the upper shielding member and the lower shielding member may be formed by winding the insulating coated wire into a flat plate as described above, but is not limited thereto. For example, a shielding copper foil sheet having a central hole formed in the center and shielding EMI [For example, it may be composed of a thin copper plate or copper tape [copper foil tape]], or may be composed of a shielding fiber sheet (not shown) having a central hole and shielding EMI.

In addition, the primary side coil element 10 is provided in contact between the main air core coil unit 11 and the upper shielding member, and a first through hole 121a communicating with the first air core 11a is located in the center A second through hole 122a communicating with the first air core 11a is provided in contact between the formed upper insulating sheet 12 and the main air core coil unit 11 and the lower shielding member is formed in the center A lower insulating sheet 12' is further included, and the auxiliary coil unit 13 is provided in contact between the upper insulating sheet 12 and the upper shielding member, or with the lower insulating sheet 12' It is provided in contact between the lower shielding member, characterized in that the output by generating an induced voltage by electromagnetic induction with the main air-core coil unit 11 .

According to this, the dielectric breakdown voltage is further increased, so that the gap between the coil parts can be further narrowed, and there is an advantage that the size of the product can be further reduced.

In the disclosed drawings, the auxiliary coil unit 13 is provided in contact between the upper insulating sheet 121 and the upper shielding coil unit 14, for example.

The upper and lower insulating sheets 12 and 12' may be formed of an insulating film made of a synthetic resin material.

In the transformer (A) according to an embodiment of the present invention, wire passage grooves 118a and 118b are formed between the plurality of primary terminal blocks 117 and 117' and the primary terminal blocks 117 and 117', and the main The wire 11k of the air-core coil unit 11 and the wire 13k of the auxiliary coil unit 13 pass through the wire passage grooves 118a and 118b and are connected to the terminal pin P1. .

As described above, since the wires 11k and 13k of the main air-core coil unit 11 and the auxiliary coil unit 13 are connected to the primary terminal pin P1 through the wire passage grooves 118a and 118b, respectively, the wire 11k ,13k) can prevent contact or short circuit, and also has the advantage of making the wiring work easy and convenient.

The plurality of primary side terminal blocks 117 and 117' are two primary side terminal blocks 117 in the center and two primary side terminal blocks 117' formed on both sides of the central two primary side terminal blocks 117. is composed

The wire passage grooves 118a and 118b are a first wire passage groove 118a formed between the two primary side terminal blocks 117 in the center, and two second wire passage grooves 118a formed on both sides of the first wire passage groove 118a. It is composed of a wire through groove (118b).

On the other hand, the wires of the upper and lower shielding coil units 14 and 14 ′ may be connected to, for example, a primary terminal pin to which the auxiliary coil unit 13 is connected or a primary terminal pin to which the main air core coil unit 11 is connected. .

And, in the transformer (A) according to an embodiment of the present invention, in the first insulating part 112 to be located in the first wire passage groove (118a) between the central primary side terminal block (117) It is formed to protrude upward, and the wire 11k of the main air-core coil unit 11 and the wire 13k of the auxiliary coil unit 13 are guided to be connected to the adjacent primary terminal pin P1, but do not contact each other. It is characterized in that it further includes a guide protrusion 119 for guiding the connection to the primary terminal pin P1 through the first wire passage groove 118a to be spaced apart.

According to this, there is an advantage that the wire 11k of the main air-core coil unit 11 and the wire 13k of the auxiliary coil unit 13 can be safely connected without contact with each other while being spaced apart.

And, the primary terminal pin (P1), the two main coil terminal pins to which the wire 11k of the main air-core coil unit 11 is connected, and the wire 13k of the auxiliary coil unit 13 are connected to two It is preferable that the auxiliary coil is composed of terminal pins.

In the transformer (A) according to an embodiment of the present invention, the rear fitting 113 is formed to protrude rearward from the rear end of the first insulating part 112, and the rear fitting groove 113a is recessed therein. And, it is formed to protrude downward from the rear fitting 113, and the insulation distance between the secondary terminal pin P2 and the primary side (meaning the primary coil element 10 and the magnetic cores 21 and 22) A plate-shaped first shielding plate 114 for securing a rear fitting protrusion 123 formed to protrude downwardly on the rear side of the second insulating part 122 so as to be fitted into the rear fitting groove 113a, and the At the rear end of the second insulating part 122, it is formed perpendicular to the second insulating part 122 to connect the secondary terminal pin P2 and the primary side (the primary coil element 10 and the magnetic cores 21 and 22). Meaning] It is characterized in that the plate-shaped second shielding plate 124 for shielding the magnetic field is further included.

In the transformer (A) according to an embodiment of the present invention, a front fastening protrusion 127 is formed to protrude forward at one side (front end) of the second insulating part 122, and the front fastening protrusion 127 is formed. is fastened to the wire passage groove 118a (specifically, the first wire passage groove 118a) of any one of the wire passage grooves 118a and 118b, and a front fastening projection ( 127) can be fastened, so there is no need to form a separate fastening groove at the front end of the secondary-side first coil element 110, so that manufacturing costs can be reduced.

In the transformer (A) according to an embodiment of the present invention, a pair of adjacent left and right forming a wire passage groove 118a (first wire passage groove 118a) to which the front fastening protrusion 127 is fastened In the primary terminal block 117, the locking end 117a is stepped in a direction opposite to each other, and it protrudes from the left and right sides of the front fastening protrusion 127 to the left and right to be hooked to the locking end 117a. A locking protrusion 127a is formed, and a guide surface 127b is inclined at the tip of the front fastening protrusion 127 so that the front fastening protrusion 127 is hooked and fastened in a hook type, and the front fastening protrusion ( 127) is characterized in that it is fastened to the wire through groove (118a) in a hook type by elasticity.

Since it adopts an elastic and hook-type fastening method, only the front fastening protrusion 127 can be elastically fastened with a click and there is an advantage in that it can be fastened conveniently, quickly and firmly. .

In the transformer (A) according to an embodiment of the present invention, the front fitting protrusion 128 is formed to protrude apart from the front fastening protrusion 127, and the front fitting protrusion 128 is the wire passing groove ( It is characterized in that it is fitted into another wire passage groove 118b (second wire passage groove 118b) among 118a and 118b.

According to this, there is an advantage that the front side of the second insulating part can be detachably fastened by using the previously formed wire passage groove 118b.

형태가 되도록 중앙에 중족(21a,22b)이 형성되어 있고, 상기 중족(21a,22b)이 제1,2 중앙공(110a,120a)과 중앙통공(10a)에 내삽되어서 1차측 코일소자(10)와 2차측 코일 소자(110,120) 간의 자기결합력을 높이기 위한 즉 누설자계를 최소로 하기 위한 자기코어(21,22)가 더 포함될 수 있다.And, in the transformer (A) according to an embodiment of the present invention, the cross section in the transverse direction

The middle feet 21a and 22b are formed in the center to have a shape, and the middle feet 21a and 22b are interpolated into the first and second center holes 110a and 120a and the central through hole 10a to form the primary coil element 10 ) and the magnetic cores 21 and 22 for increasing the magnetic coupling force between the coil elements 110 and 120, ie, for minimizing the leakage magnetic field, may be further included.

The magnetic cores 21 and 22 are separated into a lower magnetic core 21 having a midfoot 21a and an upper magnetic core 22 having a midfoot 22a formed therein.

As described above, preferred embodiments according to the present invention have been reviewed, and it is common knowledge in the technical field that the present invention can be implemented in other specific forms without changing the technical spirit or essential features in addition to the above-described embodiments. It is self-evident to those who have Therefore, it should be understood that the above-described embodiments are illustrative and not restrictive.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

A: Transformer according to an embodiment of the present invention
110: secondary side first coil element 111: first flat coil
111a: first terminal 111b: first coil pattern part
110a: first central hole 110b: inner surface of the first coil body
112: first insulating part 113: rear fitting
113a: rear fitting groove 114: first shielding plate
115: inner protrusion 116: outer protrusion
118a: first wire through groove 118b: second wire through groove
119: turn guide
120: secondary side second coil element 121: second flat coil
121a: second terminal 121b: second coil pattern part
120a: second central hole
120b: inner surface of the second coil body 122: second insulating part
123: rear fitting projection 124: second shielding plate
140: primary terminal block 140a: primary terminal hole
P1: Primary terminal pin P2: Secondary terminal pin
210: base 211: bottom
211a: terminal through hole 212: rear wall
212a: through hole 213: first side wall
214: second side wall 220: secondary terminal block
230: connector cover 231: left cover part
232: right cover part 233: loop
241: first upper insulating film 242: second upper insulating film
243: third upper insulating film
250: lower insulating film 251: first lower insulating film
252: lower inclined insulating film 253: second lower insulating film
254: third lower insulating film
10: primary side coil element 10a: primary side coil element central hole
10a': the inner peripheral surface of the primary side coil element 10b: the outer peripheral surface of the primary side coil element
11: main air core coil part 11a: first air core
11k: wire of main air core coil part
12: upper insulating sheet 12a: first through hole
12': lower insulating sheet 12'a: second through hole
13: auxiliary coil unit 13a: second air core
13k: wire of auxiliary coil
14: upper shielding coil unit 14a: first central hole
14': lower shielding coil part 14'a: second central hole
21: lower magnetic core 21a: midfoot of the lower magnetic core
22: upper magnetic core 22a: midfoot of upper magnetic core

Claims (4)

A first flat coil 111 comprising a first terminal 111a, a first coil pattern portion 111b extending from the first terminal 111a and formed in a flat spiral pattern, and a first central hole a secondary-side first coil element 110 having a first insulating portion 112 formed of a synthetic resin material having a first flat coil 111 excluding the first terminal 111a and having a 110a formed therein;
A second flat coil 121 comprising a second terminal 121a, a second coil pattern portion 121b extending from the second terminal 121a and formed in a flat spiral pattern, and a second central hole a secondary-side second coil element 120 having a second insulating portion 122 formed of a synthetic resin material having a second flat coil 121 excluding the second terminal 121a and having a 120a formed therein;
A primary-side coil element ( 10);
a plurality of primary terminal blocks 117 and 117' formed integrally with the first insulating part 112 at the front end of the first insulating part 112 and to which the primary side terminal pins P1 are fastened;
a plurality of primary side terminal pins (P1) fastened to the primary side terminal blocks (117, 117') and connected to the primary side coil element (10);
A terminal through hole 211a through which the plurality of primary side terminal pins P1 passes is formed at the front end, and the secondary side first and second coil elements 110 and 120 in which the primary side coil element 10 is loaded are mounted. The plate-shaped bottom 211 is formed vertically at the rear end of the bottom 211, so that a through hole 212a through which the secondary coil elements 110 and 120 passes is formed, and the secondary coil elements 110 and 120 are formed vertically. A rear side wall 212 to hold the rear, and a first side wall 213 formed vertically from one side of the bottom part 211 to hold one side of the secondary side coil elements 110 and 120. a base 210 for mounting the secondary-side first and second coil elements 110 and 120 in which the primary-side coil element 10 is charged;
a secondary terminal block 220 formed at the rear end of the bottom portion 211 and provided with a plurality of secondary terminal pins P2;
A connector insertion space 230a formed integrally with the first side wall 213 and into which a connector of a charger, which is a finished product, is inserted, is formed therein to cover the connector of the charger and the connector and magnetic cores 21 and 22 of the charger. ) connector cover 230 for increasing the distance for insulation between; and
and a lower insulating film (250) protruding downward from the lower surface of the bottom part (211) to insulate the primary circuit part and the secondary circuit part of the charger, which is a finished product.
The method according to claim 1,
The connector cover 230 is
Left and right cover parts 231,232 which are integrally projecting from the outer surface of the first side wall 213 so as to be perpendicular to the horizontal direction and cover the connector of the charger, which is a finished product, from left and right;
and a loop 233 integrally protruding from the outer surface of the first side wall 213 in the horizontal direction to connect the upper portions of the left and right cover portions 231,232,
A connector insertion space 230a is formed by the left and right cover parts 231,232 and the loop 233,
Transformer, characterized in that the left and right cover parts (231,232) and the loop (233) are integrally formed on the first side wall (213) so that the first side wall (213) has a higher height than the roof (233) .
3. The method according to claim 2,
It is formed in the horizontal direction on the outer surface of the first side wall 213, and is formed to protrude upward from the loop 233 at the position of the right cover part 232, so that between the connector of the finished product charger and the transformer (A) a first upper insulating film 241 that insulates the
It faces the first upper insulating film 241 and is vertically bent at the front end of the first side wall 213 so as to be spaced apart from the left cover part 231 of the connector cover 230, so that the connector of the charger as a finished product and a second upper insulating film 242 that insulates between the transformer A and the
Transformer characterized in that it further includes a third upper insulating film 243 that is vertically bent forward in the second upper insulating film 242 to insulate between the connector of the charger and the transformer A, which is a finished product.
4. The method according to claim 3,
The lower insulating film 250 is
a first lower insulating film 251 protruding downward from the boundary between the connector cover 230 and the bottom 211 to insulate the primary circuit part and the secondary circuit part of the charger, which is a finished product;
A lower inclined insulating film 252 bent at an angle from the first lower insulating film 251 to protrude downward to insulate the primary circuit part and the secondary circuit part of the finished charger;
The second lower part is formed integrally with the second upper insulating film 242 so as to escape from the bottom part 211 and coincide with the second upper insulating film 242 at the same time to insulate the primary circuit part and the secondary circuit part of the charger as a finished product. an insulating film 253;
The second lower insulating film 253 is vertically bent forward and is integrally formed on the third upper insulating film 243 to coincide with the third upper insulating film 243, so that the primary circuit part and the secondary circuit part of the charger which is a finished product. Transformer, characterized in that it is composed of a third lower insulating film (254) to insulate.

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