KR102383096B1 - A planar transformer - Google Patents

Abstract

The present invention relates to a transformer, the mount (500); PCB-type primary coil element 110 which is provided standing between the left and right side walls 512 and 513 of the mount 500; The left secondary coil element 200 on a flat plate provided while being in close contact with the left surface 110b of the PCB-type primary coil element 110 and being erected on the mount 500; a right secondary coil element 300 provided while standing on the mount 500 while being in close contact with the right side surface 110c of the PCB-type primary coil element 110; The first middle foot 411 is formed, and the first outer foot 412 is formed so as to be spaced apart from the first middle foot 411 to surround the left secondary coil element 200 and the PCB-type primary coil element 110 , and the outer surface A left magnetic core 410 that is in close contact with the left wall 512 of the mount 500 and has an inner surface in close contact with the left secondary coil element 200 to stand up to be placed on the bottom 511 of the mount 500 . ; And a second middle foot 421 is formed and spaced apart from the second middle foot 421 so as to surround the right secondary coil element 300 and the PCB-type primary coil element 110, and a second outer foot 422 is formed. , the right magnetic core ( 420), and according to this, there is an advantage that can increase the occupancy efficiency by reducing the space occupied by the floor.

Description

A PLANAR TRANSFORMER

The present invention relates to a transformer, and more particularly, to a flat plate type transformer suitable for reducing production costs by reducing the number of parts and assembling man-hours.

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

Among transformers, a small transformer used in a mobile phone charger uses a coil wound with a triple insulated wire as a coil (particularly, it is used as a secondary coil).

However, the coil wound with the triple insulated wire has difficulties in mass production, such as the need to peel the wire directly by a person, and there was a problem with a high defect rate because the triple insulated wire was not wound evenly. As a coil that has solved some problems, there is a coil printed on a printed circuit board (PCB). This printed circuit board coil is easy to mass-produce, but has a low current capacity due to a narrow cross-sectional area and causes severe heat generation. There was a problem.

The technology proposed to solve this problem is "a transformer is disclosed by 10-1579427 (announcement date: December 22, 2015).

The technique according to No. 10-1579427 above forms a secondary coil of a transformer by insert molding a metal press, and inserts a PCB board, which is a primary coil element, in which a coil is stacked between a pair of secondary coils. is a technique to

However, the prior art as described above has the following problems.

The technique according to No. 10-1579427 installed the secondary side coil and the PCB board sideways, so there was a problem in that the floor space was widened. In addition, since a separate secondary terminal pin must be provided, there is a problem in that the number of parts increases. Also, there was a problem in that a separate terminal block for installing the primary side terminal pin had to be formed.

Document 1: Registered Patent Publication No. 10-1579427 (Announcement date: December 22, 2015) Document 2: Laid-Open Patent Publication No. 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 purpose of the flat plate type transformer according to the present invention is,

First, the PCB-type primary coil element and the left and right secondary coil elements are vertically erected on the mount so that they can be fitted,

Second, it enables efficient use of the occupied space in accordance with the specifications of the charger or adapter, which is the finished product on which the transformer is mounted, by allowing it to be installed vertically.

Third, the PCB-type primary coil element can be inserted from top to bottom between the left and right secondary coil elements, so that assembly workability can be improved,

Fourth, the primary terminal pin can be fixed by molding to the left and right insulating parts itself without the need to fix the primary terminal pin or form a separate terminal block for upright, and thus the primary terminal pin can be fixed by a simple configuration. make it possible,

Fifth, in the insert molding operation process of forming the left insulating part, the first molding fixing part is integrally formed with the left insulating part and part of the primary terminal pins [left primary terminal pins] in the first molding fixing part to be fixed,

Sixth, in the insert molding work process of forming the previous right insulating part, the second molding fixing part is integrally formed with the right insulating part, and the remainder of the secondary side terminal pins [right primary terminal pins] to the second molding fixing part By making it possible to fix it, it reduces the man-hours for fastening the primary side terminal pin and improves workability.

Seventh, it is possible to reduce material cost by molding and fixing only the head part rather than molding the entire primary terminal pin,

Eighth, there is no need to separately prepare the secondary terminal pin, and there is no need to connect the secondary terminal pin to the secondary coil element, so that the number of parts can be reduced and assembly man-hours and material costs can be reduced. The overall productivity is improved, so that the cost of the product can be reduced,

Ninth, to ensure insulation between the plurality of primary-side terminal pins to provide a flat-panel transformer suitable for improving insulation characteristics.

The flat-type transformer of the present invention for achieving the above object includes a plate-shaped bottom, a left wall formed upright upward from the left end of the bottom, and upright from the left end of the bottom to face the left wall. a mount comprising a formed right side wall;

a PCB-type primary coil element having a central through hole formed in the middle so as to penetrate left and right, and being erected between the left and right walls of the mount, and formed in the form of a printed circuit board (PCB);

A first central hole is formed in the center so as to communicate with the central hole, and is provided standing up on the mount while in close contact with the left side of the PCB-type primary coil element, and an induced current is generated by the PCB-type primary coil element a left secondary coil element on a flat plate;

A second central hole is formed in the middle so as to communicate with the central hole, and is provided standing up on the mount while in close contact with the right side of the PCB-type primary coil element, and an induced current is generated by the PCB-type primary coil element. the right secondary coil element of the phase;

A first midfoot is formed in the center to be interpolated into the first central hole and the central through hole, and the first midfoot is spaced up and down from the first midfoot to surround the upper and lower sides of the left secondary coil element and the PCB-type primary coil element. a left magnetic core having an outer foot, the outer surface of which is in close contact with the left wall of the mount, and the inner surface is in close contact with the left secondary coil element, so that it is erected to be placed on the bottom of the mount; and

A second midfoot is formed in the center to be interpolated into the second central hole and the central through hole, and is spaced up and down from the second midfoot to surround the upper and lower sides of the right secondary coil element and the PCB-type primary coil element. The outer foot is formed, the outer surface is in close contact with the right wall of the mount, and the inner surface is in close contact with the right secondary coil element, and it is configured to include a right magnetic core that is erected to be placed on the bottom of the mount,

In a state in which the left secondary coil element, the PCB-type primary coil element, and the right secondary coil element are in close contact sequentially from left to right, the left magnetic core is closely coupled to the left secondary coil element, and the right magnetic The core is closely coupled to the right secondary coil element, so that the left magnetic core and the right magnetic core are placed on the bottom part 511, the left magnetic core is in close contact with the left wall, and the right magnetic core is attached to the right wall It is characterized in that it stands up on the mount so as to be in close contact with it and is fitted.

The present invention flat-panel transformer having the above configuration has the following effects.

First, there is an effect that the PCB-type primary coil element and the left and right secondary coil elements can be vertically erected on the mount and fitted.

Second, there is an effect that the occupied space can be efficiently utilized according to the specifications of the charger or adapter, which is a finished product on which the transformer is mounted, by enabling it to be vertically erected.

Third, since the PCB-type primary coil element can be inserted from top to bottom between the left and right secondary coil elements, there is an effect that assembly workability can be improved.

Fourth, the primary terminal pins can be fixed by molding to the left and right insulating parts themselves without the need to fix the primary terminal pins or form a separate terminal block to stand upright, and as a result, the primary terminal pins can be fixed by a simple configuration. can have an effect.

Fifth, in the insert molding operation process of forming the left insulating part, the first molding fixing part is integrally formed with the left insulating part and part of the primary terminal pins [left primary terminal pins] in the first molding fixing part It has a fixed effect.

Sixth, in the insert molding work process of forming the previous right insulating part, the second molding fixing part is integrally formed with the right insulating part, and the remainder of the secondary side terminal pins [right primary terminal pins] to the second molding fixing part It can be fixed, and as a result, there is an effect of reducing the man-hours for fastening the primary side terminal pin and improving the workability.

Seventh, there is an effect of reducing material cost by molding and fixing only the head portion rather than molding the entire primary terminal pin.

Eighth, there is no need to separately prepare the secondary terminal pin, and there is no need to connect the secondary terminal pin to the secondary coil element, so it is possible to reduce the number of parts and reduce assembly man-hours and material costs, Overall, the productivity is improved, which has the effect of reducing the cost of the product.

Ninth, insulation between the plurality of primary-side terminal pins can be ensured, and as a result, insulation properties can be improved.

1 is a perspective view of a plate-type transformer (A) according to an embodiment of the present invention.
2 is a rear perspective view of a flat plate type transformer (A) according to an embodiment of the present invention.
3 is an exploded perspective view of a flat plate type transformer (A) according to an embodiment of the present invention.
4 is an exploded perspective view of a left flat plate coil 210 and a right flat plate coil 310 in a flat plate transformer A according to an embodiment of the present invention.
5 is a rear exploded perspective view of a flat plate type transformer (A) according to an embodiment of the present invention.
6 is a cross-sectional view of a plate-type transformer (A) according to an embodiment of the present invention.
7 is a cross-sectional view of the terminal hole 111 in the flat-panel transformer (A) according to an embodiment of the present invention.
8 is a front view of a flat plate type transformer (A) according to an embodiment of the present invention.

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

The plate-type transformer according to the present invention is a plate-type transformer for a charger or an adapter used by being mounted on the main PCB of a charger or adapter.

A flat-panel transformer according to an embodiment of the present invention includes a mount 500, a PCB-type primary coil element 110, a left secondary coil element 200 on a flat plate, a right secondary coil element 300 on a flat plate, and a left It is characterized in that it is configured to include a magnetic core 410 and a right magnetic core (420).

The mount 500 includes a plate-shaped bottom part 511 , a left wall 512 formed upwardly from the left end of the bottom part 511 , and the bottom part 511 to face the left wall 512 . ) is a configuration including a right wall 513 formed upright upward from the left end.

The PCB-type primary coil element 110 has a central through hole 110a formed in the center so as to penetrate left and right, and is provided standing up between the left wall 512 and the right wall 513 of the mount 500 and , the left secondary coil element 200 and the right secondary coil element 300 are inserted and provided, and printed circuit board (PCB) to generate an induced current in the left and right secondary coil elements 200 and 300 ) in the form of an element.

The PCB-type primary coil element 110 is a multilayer printed circuit board (MLB) in which a plurality of insulating substrates (not shown) on which a metallic conductor pattern is formed in a spiral shape are stacked.

The left secondary coil element 200 on the flat plate has a first central hole 200a formed in the center to communicate with the central through hole 110a, and the left side surface 110b of the PCB-type primary coil element 110. It is a coil element on a flat plate that is provided while being in close contact with the mount 500 and induced current is generated by the PCB-type primary coil element 110 .

The left magnetic core 410 has a second central hole 300a formed in the middle so that the right secondary coil element 300 on a flat plate communicates with the central through hole 110a, and the PCB type primary coil element 110 ) is a flat coil element that is erected on the mount 500 while closely adhering to the right side 110c, and in which an induced current is generated by the PCB-type primary coil element 110 .

A first middle foot 411 is formed in the center so as to be interpolated into the first central hole 200a and the central through hole 110a, and the left secondary coil element 200 is spaced up and down from the first middle foot 411. And the first outer foot 412 is formed to surround the upper and lower sides of the PCB-type primary coil element 110, the outer surface is in close contact with the left wall 512 of the mount 500, and the inner surface is the left secondary coil It is in close contact with the device 200 so as to be placed on the bottom 511 of the mount 500 and is provided.

A second midfoot 421 is formed in the center of the right magnetic core 420 to be interpolated into the second central hole 300a and the central through hole 110a, and is spaced up and down from the second midfoot 421 to the right side of the magnetic core 420 . The second outer foot 422 is formed to surround the upper and lower sides of the secondary coil element 300 and the PCB-type primary coil element 110 , and the outer surface is in close contact with the right wall 513 of the mount 500 and The inner surface is in close contact with the right secondary coil element 300 so as to be erected so as to be placed on the bottom part 511 of the mount 500 is provided.

In the flat-panel transformer according to an embodiment of the present invention, the left secondary coil element 200, the PCB-type primary coil element 110, and the right secondary coil element 300 are sequentially in close contact from left to right. In the present state, the left magnetic core 410 is closely coupled to the left secondary coil element 200 , and the right magnetic core 420 is closely coupled to the right secondary coil element 300 , so that the left The magnetic core 410 and the right magnetic core 420 are mounted on the bottom part 511, the left magnetic core 410 is in close contact with the left wall 512, and the right magnetic core 420 is attached to the right wall ( 513), it is characterized in that it is erected on the mount 500 and fitted.

According to the above configuration, there is an advantage in that the PCB-type primary coil element 110 and the left and right secondary coil elements 200 and 300 can be vertically erected and fitted to the mount 500 . As a result, there is an advantage that the occupied space can be efficiently utilized according to the specifications of the charger, which is a finished product.

In addition, since the primary side PCB-type primary coil element 110 can be inserted between the left and right secondary coil elements 200 and 300 from top to bottom, there is an advantage that assembly workability can be improved.

In the flat-panel transformer according to an embodiment of the present invention, the left secondary coil element 200 has a metal line that is not in contact with each other in a planar spiral pattern (in the drawing, wound twice, two turns) ] The formed left coil pattern part 211, the left first terminal 212a for connecting to the main PCB of the finished product (charger or adapter) by extending from one end of the left coil pattern part 211, and the left coil A left flat coil 210 comprising a left second terminal 212b extending from the other end of the pattern portion 211, a first central hole 200a is formed, and left first and second terminals 212a, 212b) except for the left side coil pattern portion 211 is characterized in that it is configured to include a left side insulating portion 220 made of a synthetic resin material.

In the flat plate transformer according to an embodiment of the present invention, the right secondary coil element 300 on the flat plate has a metal line that is not in contact with each other in a planar spiral pattern [in the drawing, two turns, two turns ( turn)] formed right coil pattern part 311, the right first terminal 312a extending from one end of the right coil pattern part 311 to connect to the main PCB of the finished product (charger or adapter), and the A right flat coil 310 consisting of a right second terminal 312b extending from the other end of the right coil pattern part 311, a second central hole 300a is formed, and the right first and second terminals ( Except for 312a and 312b), it is characterized in that it comprises a right insulating part 320 made of a synthetic resin material having a right coil pattern part 311 embedded therein.

A terminal hole 111 to which the primary terminal pins 121 and 122 are connected is formed on one side (front end in the drawing) of the PCB-type primary coil element 110 .

In the flat-panel transformer according to an embodiment of the present invention, a first molding fixing part 231 for fixing by partially molding the primary terminal pins 121 and 122 on one side (upper side of the front end) of the left insulating part 220 . ) is formed, and a second molding fixing part 331 for fixing the primary terminal pins 121 and 122 by partially molding the other side (lower front end) of the right insulating part 320 is formed, and a plurality of Some of the primary side terminal pins 121 (eg, the two left primary side terminal pins 121 ) are partially molded and fixed to the first molding fixing part 231 , and the plurality of primary side terminal pins 122 . ) (for example, the two right primary terminal pins 122) are partially molded and fixed to the second molding fixing part 331, and the primary terminal pins 121 and 122 are the first and second moldings. It is characterized in that it is partially molded to the fixing parts 231 and 331 and connected to the terminal hole 111 in a fixed state.

According to this, the primary side terminal pins 121 and 122 are molded and fixed to the left and right insulating parts 320 itself without the need to fix the primary terminal pins 121 and 122 or to form a separate terminal block for upright, so that the primary side by a simple configuration There is an advantage in that the terminal pins 121 and 122 can be fixed.

In addition, in the flat plate transformer according to an embodiment of the present invention, the left insulating part 220 is formed by insert molding by resin injection after inserting the left flat plate coil 210 into an injection mold, The right insulating part 320 is formed by insert molding by resin injection after inserting the right flat coil 310 into an injection mold, and the left insulating part 220 and the first molding fixing part 231 are At the same time, integrally injection-molded, and a portion of the primary side terminal pins 121 and 122 is injection-molded with the left insulating part 220 and the first molding fixing part 231 when the left flat coil 210 is insert-molded. It is partially insert-molded at the time and fixed to the first molding fixing part 231, and the rest 122 of the primary side terminal pins 121 and 122 is insulated on the right side when the right flat coil 310 is insert-molded. During injection molding of the part 320 and the second molding fixing part 331 , it is partially insert-molded and fixed to the second molding fixing part 331 .

According to this, in the previous insert molding operation process of forming the left insulating part 220, the first molding fixing part 231 is integrally formed with the left insulating part 220 and at the same time, 1 is applied to the first molding fixing part 231. Part of the secondary terminal pin (left primary terminal pin 121) can be fixed, and a second molding integrally with the right insulating part 320 in the insert molding operation process of forming the existing right insulating part 320 At the same time as the fixing part 331 is molded, the rest of the secondary terminal pins (right primary terminal pins 122) can be fixed to the second molding fixing part 331, so that the primary terminal pins 121 and 122 are fastened. There is an advantage in that the work man-hours can be reduced and workability can be improved.

In the flat-panel transformer according to an embodiment of the present invention, the primary side terminal pins 121 and 122 are molded and fixed to the first and second molding fixing parts 231 and 331 and a head part connected to the terminal hole 111 . It is characterized in that it is composed of (121a, 122a), and the tail parts (121b, 122b) that are bent downward to form a 'L' in the head parts 121a and 122a and are connected to the main PCB of the finished product.

According to this, since only the head parts 121a and 122a are molded and fixed instead of the entire primary terminal pins 121 and 122 being molded, there is an advantage that material costs can be reduced, and also the head parts 121a and 122a and the tail part 121b. ,122b), it is possible to connect to the terminal hole 111 of the PCB-type primary coil element 110 and at the same time connect to the main PCB of the finished product.

In the flat-panel transformer according to an embodiment of the present invention, the left-side flat-type coil 210 extends from the left-side first terminal 212a to form a first vertical bent portion 213 vertically bent outward in the horizontal direction. ) and the secondary-side left terminal pin 215 extending from the first vertical bent part 213 and vertically bent downwardly connected to the main PCB is further included.

In addition, in the flat-panel transformer according to an embodiment of the present invention, the right-side flat-type coil 310 extends from the right-side first terminal 312a and is vertically bent outwardly in the horizontal direction. (313) and the secondary-side right terminal pin 315 extending from the second vertical bent part 313 and vertically bent downwardly connected to the main PCB is further included.

According to the above configuration, since it is unnecessary to separately prepare the secondary terminal pin and connect the secondary terminal pin to the secondary coil element, the number of parts can be reduced, and the assembly man-hour and material cost can be reduced. There is an advantage, and there is an advantage in that the overall productivity is improved, so that the cost of the product can be reduced.

In the flat-panel transformer according to an embodiment of the present invention, the primary terminal pins 121 and 122 have a head part 121a molded to the first molding fixing part 231 connected to the terminal hole 111 and , two left primary terminal pins 121 bent to the left so that the tail portion 121b is disposed on the left side of the PCB type primary coil element 110 , and a head molded to the first molding fixing unit 231 . The part 122a is connected to the terminal hole 111 and the tail part 122b is formed by bending to the right so as to be disposed on the right side of the PCB-type primary coil element 110. It consists of two right primary side terminal pins 122, and , to divide the two left primary terminal pins 121 so that they do not contact each other, insulate between the two left primary terminal pins 121 , and to guide the wiring in the height direction on the inner surface of the left wall 512 . The first terminal insulating rib 523 formed up to the bottom part 511 along A second terminal insulating rib 524 formed on the inner surface of the right wall 513 along the height direction to the bottom portion 511 is further included to guide the structure.

According to this, since the insulation between the primary terminal pins 121 and 122 can be secured, there is an advantage in that the insulation characteristics are improved.

In the flat-panel transformer according to an embodiment of the present invention, the first terminal insulating rib 523 is interpolated by the left primary terminal pin 121 positioned outside of the two left primary terminal pins 121 . After protruding inward from the left wall 512 so that a left arrangement groove 523a for guiding the arrangement is formed, it is formed to protrude forward again, and is located outside of the two left primary side terminal pins 121 The left primary side terminal pin 121 is disposed to be inserted into the left arrangement groove 523a, and the left primary side terminal pin 121 located inside of the two left primary side terminal pins 121 is the first terminal. By being disposed outside the insulating rib 523 , the two left primary side terminal pins 121 are insulated from the first terminal insulating rib 523 .

And, in the flat-panel transformer according to an embodiment of the present invention, the second terminal insulating rib 524 is a right primary side terminal pin 122 located outside of the two right primary side terminal pins 122 . It protrudes inwardly from the right side wall 513 so as to form a right side arrangement groove 524a for guiding the arrangement by being interpolated, and then protrudes forward again, and is formed outside of the two right primary terminal pins 122 . The right primary side terminal pin 122 located inside the right primary side terminal pin 122 is disposed to be inserted into the right side arrangement groove 524a, and the right primary side terminal pin 122 located inside of the two right primary side terminal pins 122 is By being disposed outside the two-terminal insulating rib 524 , the two right primary side terminal pins 122 are insulated from the second terminal insulating rib 524 .

In the flat plate transformer according to an embodiment of the present invention, two terminal through holes 521 through which the two left primary side terminal pins 121 pass are formed on the left side of the front end of the bottom portion 511, , the first terminal insulating rib 523 is formed to terminate between the two terminal through-holes 521 .

In addition, two terminal through holes 522 through which the two right primary side terminal pins 122 pass are formed on the right side of the front end of the bottom part 511, and the second terminal insulating rib 524 is It is characterized in that it is formed so as to terminate between the two terminal through holes (522).

In the flat-panel transformer according to an embodiment of the present invention, it is spaced downward from the first molding fixing part 231 with a gap space g1 and is integrally formed below the front end of the left insulating part 220 and , to maintain the distance between the two left primary terminal pins 121, the left primary terminal pins 121 to maintain the bent state of the inner primary terminal pins among the left primary terminal pins 121 Among them, it is characterized in that a bending molding part 232 for fixing the inner primary terminal pins 121 and 122 in a bent state is further included.

According to this, it is possible to hold the left primary side terminal pin 121, so that stable mounting is possible.

The gap space g1 provides a space in which the head part 122a of the right primary side terminal pin 122 molded and fixed to the second molding fixing part 331 can be disposed. According to this, there is an advantage in that the right primary side terminal pin 122 can be mounted smoothly.

In the flat-panel transformer according to an embodiment of the present invention, a left shielding film 241 for securing an insulation distance to insulate a primary side and a secondary side is protruded from the left insulating part 220, and the A right shielding film 341 for securing an insulating distance for insulating the primary side and the secondary side is protruded from the right insulating part 320 .

In the flat-panel transformer according to an embodiment of the present invention, the mount 500 includes a first rear wall 514a formed by bending the inside at the rear end of the left wall 512, and the first rear wall 514a. ) and a second rear wall 514b bent inside at the rear end of the right wall 513 to be spaced apart from each other, and the left and right shielding films 241 and 341 can be inserted from the first and second rear walls 514a and 514b A first support end 531 formed to protrude upward from the rear end of the mount 500 and spaced apart from each other by a distance, and a second support end 532 formed to protrude upwardly from the first support end 531, and the first and a third support end 533 spaced apart from the rear wall 514a so that the left shielding film 241 can be inserted and formed with a step to protrude upward from the second support end 532 is further included. do it with

In the flat plate transformer according to an embodiment of the present invention, the left secondary coil element 200 is supported by the second support end 532 so as to be in close contact with the side surface of the third support end 533, It is formed to protrude outward from the outer surface of the left shielding film 241 and further includes a left support 251 for supporting the left secondary coil element 200 to the mount 500, and the right secondary coil element 300 ) is formed to protrude outward from the outer surface of the right shielding film 341 so as to be supported by the first support end 531 so as to be in close contact with the side surface of the second support end 532, so that the right secondary coil element 300 is formed. It is characterized in that it is configured to further include a right support 351 for supporting the mount (500).

According to the above configuration, there is an advantage in that the left and right secondary coil elements 200 and 300 can be stably installed without a gap or flow.

The left second terminal 212b is formed across the left coil pattern portion 211 by being bent outwardly (by bending U-shaped) at the inner end of the left coil pattern portion 211, and the right second terminal A 312b is formed across the right coil pattern part 311 by being bent outwardly (by being bent in a U shape) at the inner end of the right coil pattern part 311 .

In the flat plate transformer according to an embodiment of the present invention, the left flat coil 210 includes a left connection terminal 214 bent to the right from the left second terminal 212b, and the left connection terminal ( A fitting groove 214a having a concave recess formed at the end of 214 is further included, and the right flat coil 310 includes a right connection terminal 314 bent to the left from the right second terminal 312b, and the The fitting protrusion 314a protruding from the end of the right connection terminal 314 is further included, and the fitting groove 214a and the fitting protrusion 314a are defective to fit the left connection terminal 214 and the right connection terminal ( 314) is connected, and the left flat plate coil 210 and the right flat plate coil 310 are connected in series.

According to this, there is an advantage that the connection between the left connection terminal 214 and the right connection terminal 314 is strong and reliable without flow or play, so that a contact failure in the series connection can be prevented.

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: Flat plate transformer according to an embodiment of the present invention
110: PCB type primary coil element 110a: central hole
110b: left side 110c: right side
111: terminal hole
121: left primary terminal pin 122: right primary terminal pin
121a, 122a, : Head part of the primary terminal pin
121b, 122b, : Tail part of the primary terminal pin
200: left secondary coil element 200a: first central hole
210: left flat coil 211: left coil pattern part
212a: left first terminal 212b: left second terminal
213: first vertical bent part
214: left connection terminal 214a: fitting groove
215: secondary left terminal pin
220: left side insulation
231: first molding fixing part g1: gap space
232: bending molding part
241: left shield 251: left support
300: right secondary coil element 300a: second central hole
310: right flat coil 311: right coil pattern part
312a: right first terminal 312b: right second terminal
313: second vertical bent part 315: secondary side right terminal pin
320: right insulating part 331: second molding fixing part
341: right shield
410: left magnetic core
411: first middle foot 412: first outer foot
420: left magnetic core
421: first midfoot 422: first exofoot
500: mount 511: bottom
512: left wall 513: right wall
514a: first rear wall 514b: second rear wall
521,522: terminal through hole
523: first terminal insulating rib 523a: left arrangement groove
524: second terminal insulating rib 524a: right arrangement groove
531: first support end 532: second support end
533: third support group

Claims (4)

The plate-shaped bottom part 511, the left wall 512 formed upright upward from the left end of the bottom part 511, and the left end of the bottom part 511 so as to face the left wall 512, upward Mount 500 including a right wall 513 formed upright with;
A central through hole 110a is formed in the center so as to penetrate left and right, and it is provided standing between the left wall 512 and the right wall 513 of the mount 500, and printed circuit board (PCB) PCB-type primary coil element 110 formed in the form;
A first central hole 200a is formed in the center so as to communicate with the central through-hole 110a, and is placed on the mount 500 while in close contact with the left side surface 110b of the PCB-type primary coil element 110. a left secondary coil element 200 on a flat plate provided with an induced current by the PCB-type primary coil element 110;
A second central hole (300a) is formed in the middle so as to communicate with the central through hole (110a), and is provided standing on the mount (500) while in close contact with the right side surface (110c) of the PCB-type primary coil element (110) and a right secondary coil element 300 on a flat plate in which an induced current is generated by the PCB-type primary coil element 110;
A first middle foot 411 is formed in the center so as to be interpolated into the first central hole 200a and the central through hole 110a, and the left secondary coil element 200 is spaced up and down from the first middle foot 411. And the first outer foot 412 is formed to surround the upper and lower sides of the PCB-type primary coil element 110, the outer surface is in close contact with the left wall 512 of the mount 500, and the inner surface is the left secondary coil a left magnetic core 410 provided in close contact with the element 200 and standing up to be placed on the bottom 511 of the mount 500; and
A second middle foot 421 is formed in the center so as to be interpolated into the second central hole 300a and the central through hole 110a, and the right secondary coil element 300 is spaced up and down from the second middle foot 421. And the second outer foot 422 is formed to surround the upper and lower sides of the PCB-type primary coil element 110, the outer surface is in close contact with the right wall 513 of the mount 500, and the inner surface is the right secondary coil It is in close contact with the device 300 and is configured to include a right magnetic core 420 that is provided standing up to be placed on the bottom 511 of the mount 500,
In a state in which the left secondary coil element 200, the PCB-type primary coil element 110, and the right secondary coil element 300 are in close contact sequentially from left to right, the left magnetic core 410 is In close contact with the primary coil element 200, the right magnetic core 420 is closely coupled to the right secondary coil element 300, so that the left magnetic core 410 and the right magnetic core 420 are bottomed. It is placed on the part 511 , the left magnetic core 410 is in close contact with the left wall 512 , and the right magnetic core 420 is in close contact with the right wall 513 , so that it is erected on the mount 500 . Flat type transformer characterized in that it is fitted.
The method according to claim 1,
The left secondary coil element 200,
A left coil pattern portion 211 in which metal lines not in contact with each other are formed in a planar spiral pattern, a left first terminal 212a extending from one end of the left coil pattern portion 211, and the left coil pattern portion ( A left flat coil 210 comprising a left second terminal 212b extending from the other end of the 211 and
The first central hole 200a is formed and it is configured to include a left insulating part 220 made of a synthetic resin material for embedding a left coil pattern part 211,
The right secondary coil element 300 on the flat plate,
A right coil pattern part 311 in which metal lines not in contact with each other are formed in a planar spiral pattern, a right first terminal 312a extending from one end of the right coil pattern part 311, and the right coil pattern part ( A right flat coil 310 consisting of a right second terminal 312b extending from the other end of the 311,
The second central hole 300a is formed and it is configured to include a right side insulating part 320 made of synthetic resin for embedding a right side coil pattern part 311,
A terminal hole 111 to which the primary terminal pins 121 and 122 are connected is formed on one side of the PCB-type primary coil element 110,
A first molding fixing part 231 for partially molding and fixing the primary terminal pins 121 and 122 is formed on one side of the left insulating part 220,
A second molding fixing part 331 for fixing the primary terminal pins 121 and 122 by partially molding is formed on the other side of the right insulating part 320,
Some of the plurality of primary terminal pins 121 are partially molded and fixed to the first molding fixing part 231,
The remainder of the plurality of primary terminal pins 122 is partially molded and fixed to the second molding fixing part 331,
The primary terminal pins 121 and 122 are partially molded to the first and second molding fixing parts 231 and 331 and connected to the terminal hole 111 in a fixed state,
The left insulating part 220 and the first molding fixing part 231 are integrally injection-molded at the same time,
A part of the primary terminal pins 121 and 122 is partially insert-molded during injection molding of the left insulating part 220 and the first molding fixing part 231 and fixed to the first molding fixing part 231,
The rest of the primary terminal pins 121 and 122 are partially insert-molded during injection molding of the right insulating part 320 and the second molding fixing part 331 to be fixed to the second molding fixing part 331. Characterized by a flat plate type transformer.
3. The method according to claim 2,
The primary terminal pins 121 and 122 are
Head parts 121a and 122a connected to the terminal hole 111 by being molded and fixed to the first and second molding fixing parts 231 and 331;
Flat type transformer, characterized in that it is bent downward from the head part (121a, 122a) and is composed of tail parts (121b, 122b) connected to the main PCB of the finished product.
3. The method according to claim 2,
The left flat coil 210 is,
a first vertical bent portion 213 extending from the left first terminal 212a and bent outward in a horizontal direction;
It extends from the first vertical bent portion 213 and is vertically bent downwardly so as to further include a secondary-side left terminal pin 215 connected to the main PCB,
The right flat coil 310 is,
a second vertical bent portion 313 extending from the right first terminal 312a and bent outward in a horizontal direction;
A plate-type transformer, characterized in that it extends from the second vertical bent part (313) and is vertically bent downwardly and further includes a secondary-side right terminal pin (315) connected to the main PCB.

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