KR102399391B1 - Flat type transformer - Google Patents

Abstract

The present invention has excellent insulation, durability, and noise shielding properties by introducing a molding method for components requiring insulation, and can be applied to thin and high-load products because it is slim and high-capacity can be applied to secure product competitiveness. A flat-type transformer that can automate some processes, significantly increasing manufacturability and productivity, and can improve economic feasibility by lowering the manufacturing cost as it does not require a printed circuit board (PCB) for the configuration of the primary coil is about According to the present invention, a primary coil mounting unit provided with a primary coil and a secondary coil mounting unit provided with a secondary coil are formed, and a primary coil connecting pin and a secondary coil connecting pin are formed in the same direction from both ends, respectively. bobbin assembly; a molding cover member molded to surround and insulate the bobbin assembly, the molding cover member being molded to expose the primary coil connection pin and the secondary coil connection pin; an upper and lower core member provided on the molding cover member; an insulating tape provided while surrounding the upper and lower core members; and a base member coupled to one side of the molding cover member.

Description

Flat type transformer {FLAT TYPE TRANSFORMER}

The present invention relates to a flat-type transformer, and more particularly, by introducing a molding method for a component requiring insulation, has excellent insulation, durability, and noise shielding properties. Product competitiveness can be secured because it can be applied to It relates to a flat-type transformer that can improve economic efficiency by lowering the

A variety of electronic devices such as TV (Television), monitor (Monitor), PC (Personal computer), OA (Office automation) devices and the like require various types of power sources.

Therefore, such electronic devices are generally provided with a device for converting AC power supplied from the outside into power required for each electronic application device, and a switching transformer is mainly used.

In general, switching transformers convert 85-265V AC power to 3-30V DC power by high-frequency oscillation of 25-100KHz. Therefore, it is possible to significantly reduce the size of the core and bobbin compared to a general transformer that converts 85-265V AC power to 3-30V AC power with frequency oscillation of 50-60Hz. Since it can stably supply low-voltage, low-current DC power to electronic application devices, it is widely used in electronic application devices that are in the trend of miniaturization in recent years.

1 is an exploded perspective view of a transformer according to the prior art, FIG. 2 is a partially exploded perspective view of FIG. 1, and FIG. 3 is an assembled perspective view of FIG.

The conventional transformer 1 is as shown in FIGS. 1 to 3, the transformer 1 according to the prior art, the lower and upper cores 10a and 10b, the primary coil 40, and the lower and upper secondary It is configured to include coils 30a and 30b, and lower and upper brackets 20a and 20b.

Here, the lower and upper brackets 20a and 20b serve as a bobbin body for holding and fixing each coil.

Specifically, the lower and upper cores 10a and 10b are provided with a central leg portion 12 and an outer leg portion 11 . And the primary coil 40 is made in the form of a substrate, an insertion hole 41 to be inserted into the central leg portion 12 is formed, and an external lead protrudes to the outside of the lower and upper cores 10a and 10b. An insertion hole 42 into which a pin (not shown) is inserted is formed.

In addition, the lower and upper secondary coils 30a and 30b may be insulated by being surrounded by at least two insulators of a conductor wire 31 having an insulation distance from the conductor pattern of the primary coil 40 therein. made of an insulated wire (32). And the multi-insulated wire 32 is disposed in the space formed between the central leg part 12 and the outer leg part 11 of the lower and upper cores 10a and 10b, and the central leg part 12 is the center can be wound with

In addition, in the lower and upper brackets 20a and 20b serving as a bobbin body, an insertion hole 21 is formed so as to be inserted into the central leg portion 12, and the insertion hole 21 is bent forward and backward (22). is formed so that the wires 31 and 32 of the lower and upper secondary coils 30a and 30b are drawn out when the lower and upper secondary coils 30a and 30b are inserted and assembled into the lower and upper cores 10a and 10b. and the lower and upper secondary coils 30a and 30b are maintained in an assembled state at their original positions.

The transformer 1 according to the prior art having the lower and upper brackets 20a and 20b configured as described above has the lower and upper secondary coils 30a and 30b thin and flexible, so it is easily deformed during assembly. loses its original form.

Accordingly, the lower and upper secondary coils 30a and 30b maintain their original shapes and are difficult to assemble, and even after assembly, they cannot be accurately fixed in the lower and upper cores 10a and 10b, so they are deformed or separated from their original positions. easy to become Furthermore, the lower and upper brackets 20a and 20b contribute to the improvement of the assembly properties of the lower and upper secondary coils 30a and 30b in terms of their structure, or the lower and upper secondary coils 30a and 30b are located in the original assembly position or It does not contribute much to maintaining the posture.

In addition, since the primary coil 40 is composed of a substrate, a separate process for manufacturing the substrate for the primary coil is required, which has a problem of increasing the manufacturing cost.

In addition, as shown in FIGS. 1 and 2 , the transformer 1 including each of the components as described above is provided on the central leg portion 12 of the lower core 10a, a lower bracket 20a, The lower secondary coil 30a, the primary coil 40, the upper secondary coil 30b, and the upper bracket 20b are inserted and installed to obtain an assembled state as shown in FIG. 2, and then, as shown in FIG. 3, the upper The assembly is completed by covering the upper part of the upper bracket 20b with the core 10b.

As described above, since the transformer 1 according to the prior art is assembled in the form of sequentially stacking all parts, the original shape of the lower and upper secondary coils 30a and 30b is changed while each part is stacked. It can be deformed, and it is difficult to assemble all the parts in place. In particular, in the case of the upper secondary coil 30b and the upper bracket 20b, as shown in FIG. 2, since they cannot be inserted into the central leg portion 12 of the lower core 10a, the upper secondary coil 30b ) and the upper bracket (20b) are separated from their original positions.

Accordingly, it is not easy to assemble the upper core 10b, and it is difficult to realize the original performance of the transformer 1 assembled in this way.

As a part of solving this problem, as another conventional technique, Korean Utility Model Publication No. 20-2018-0000677 proposes a transformer (transformer) capable of increasing installation compatibility by slimming the appearance of the product.

However, in the transformer of Korean Utility Model Publication No. 20-2018-0000677, the components constituting the bobbin part and the fixing part are divided into a plurality of parts, so the assembly man-hour increases and the assembling property decreases, the productivity is significantly reduced, and also As a plurality of components are assembled with each other, there is a problem in that durability is deteriorated.

Republic of Korea Public Utility Model Publication 20-2018-0000677 (published on March 8, 2018) Korean Patent Laid-Open Publication No. 10-2008-0031481 (published on 2008.04.08.) Republic of Korea Patent Publication No. 10-1851653 (2018.04.25. Announcement) Republic of Korea Patent Publication No. 10-1240865 (2013.03.11. Announcement)

Therefore, the present invention for solving the above problems of the prior art has excellent insulation, durability, and noise shielding properties by introducing a molding method for a component that requires insulation, and has a slim and high capacity, so that it is thin and high load. Its purpose is to provide a flat-type transformer that can be applied to products and can secure product competitiveness.

In addition, the present invention can automate some processes such as the coil installation process and the molding cover member forming process, thereby significantly increasing the manufacturability and productivity, and does not require a printed circuit board (PCB) for the configuration of the primary coil. An object of the present invention is to provide a flat-type transformer capable of improving economic feasibility by lowering the manufacturing cost.

The problems to be solved of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to one aspect of the present invention for achieving the above objects and other features of the present invention, a primary coil mounting unit provided with a primary coil and a secondary coil mounting unit provided with a secondary coil are formed, and both ends are provided in the same direction a bobbin assembly in which a primary coil connecting pin and a secondary coil connecting pin are formed, respectively; a molding cover member molded to surround and insulate the bobbin assembly, the molding cover member being molded to expose the primary coil connection pin and the secondary coil connection pin; an upper and lower core member provided on the molding cover member; an insulating tape provided while surrounding the upper and lower core members; and a base member coupled to one side of the molding cover member.

In the present invention, the bobbin assembly is formed with a primary coil mounting part having a primary coil wound in the central part and a secondary coil mounting part having a pair of secondary coils mounted on the upper and lower parts, and on the lower surface of one end. a bobbin body provided with a plurality of primary coil connecting pins spaced apart; a secondary coil connection bracket having one end coupled to the other end of the bobbin body and having a plurality of secondary coil connecting pins spaced apart from each other on a lower surface of the other end; and coupling means formed between the bobbin body and the secondary coil connection bracket and configured to couple the bobbin body and the secondary coil connection bracket.

In the present invention, the bobbin body, the central body of the cylindrical shape; Upper and lower flanges including an upper flange and a lower flange extending outward from each of the upper and lower ends of the central body; and a secondary coil mounting slot formed in each of the upper flange and the lower flange, wherein the secondary coil mounting slot is formed as an annular mounting slot of a predetermined depth radially outward from the inner side of each of the upper flange and the lower flange It is composed of an outer flange portion and an inner flange portion, respectively, and one end may be opened so that the secondary coil is inserted and mounted.

In the present invention, a cutout of a predetermined size may be formed in the upper and lower flanges on the opening side of the upper and lower flanges.

In the present invention, a guide slot for guiding the end of the primary coil is formed in the lower flange between the primary coil connecting pins, and one end of the primary coil wound on the primary coil mounting unit is hooked and fixed to one end of the upper flange. A plurality of coil end fixing protrusions may be formed to be spaced apart.

In the present invention, the bobbin body, one or more mold fixing protrusions formed on the outer periphery of at least one of the upper flange and the lower flange, one or more pressing protrusions formed on the surface facing the outside from the upper and lower flanges, and the upper and lower flanges It may further include at least one of the distance maintaining protrusions formed on the surface facing outward in the.

In the present invention, the pressing protrusion is formed with a plurality of gaps on the upper surface of the inner edge in at least one of the upper flange and the lower flange, and the distance maintaining protrusion is the upper surface of the outer edge in at least one of the upper flange and the lower flange. It may be formed in plurality with a gap therebetween.

In the present invention, the secondary coil connection bracket includes a body block, a coupling block integrally protruding from one end surface of the block body and fitted to the primary coil mounting portion at one end of the bobbin body; The protruding walls for the left and right stoppers that protrude orthogonally from the boundary of the body block and the coupling block and are formed with a distance from each other, and the body block are integrally formed, and one side is formed with a gap between the protruding walls for the left and right stoppers It includes a "C"-shaped coil short prevention partition wall, a secondary coil guide groove is formed in the body block in contact with the vertical wall of the partition wall, and the secondary coil connecting pin is connected to the body with respect to the vertical wall. It may be formed on both sides of the lower surface of the block.

In the present invention, the coupling means may include: a hook protrusion protruding from one end of the secondary coil connection bracket; and a hook fastening hole formed in a flange portion of an opening side of the secondary coil mounting slot.

In the present invention, the molding cover member, exposing the primary coil connection pin and the secondary coil connection pin, has a central penetrating portion in the central portion, is molded on the outside of the bobbin assembly, and extends outwardly on one side of the outer surface A base member coupling piece is formed, and the upper and lower core members have an insertion portion fitted to the central penetration portion of the molding cover member, and a pair of upper and lower core members coupled to upper and lower sides of the molding cover member. may be absent.

In the present invention, the base member has an upper surface, a front surface, and a rear surface open, and is formed in the form of an enclosure in which a part of the side surface is cut, and a guide slot in which the base member coupling piece of the molding cover member is fitted to one end of the base member. can be formed.

In the present invention, the guide slot is formed between a pair of rails formed along one end of the base member, and an outer rail facing the outside of the pair of rails may be formed to extend more than the inner rail.

According to the flat type transformer according to the present invention, the following effects are provided.

First, the present invention has the effect of providing a transformer having excellent insulation, durability, and noise (transformation) shielding properties by introducing a molding method for a component requiring insulation.

Second, the present invention has the effect of providing an ultra-slim and high-capacity transformer capable of satisfying electrical insulation standards by securing a distance for insulation reinforcement at the same time as the molding cover member is formed.

Third, the present invention can be made slim as a whole, enabling the implementation of a thin transformer, and also having a high capacity, so that it can be applied to products of high load (high capacity transformer).

Fourth, the present invention can automate some processes such as a coil installation process and a molding cover member forming process, thereby significantly increasing manufacturability and productivity.

Fifth, the present invention does not require a printed circuit board for forming the primary coil (that is, the primary coil), thus excluding a separate manufacturing process for this, lowering the manufacturing cost of the transformer and improving economic efficiency, , it has the effect of increasing product competitiveness.

Sixth, the coil terminal connecting pins to which the primary coil and the secondary coil are connected and fixed can be configured in the same direction, thereby facilitating the operation.

Effects of the present invention are not limited to those mentioned above, and other solutions not mentioned will be clearly understood by those skilled in the art from the following description.

1 is an exploded perspective view of a transformer according to the prior art.
FIG. 2 is a partially exploded perspective view of FIG. 1 ;
3 is an assembled perspective view of FIG. 1 ;
4 is a perspective view showing a flat-type transformer according to the present invention.
5 is a disassembled perspective view of a base member, which is a part constituting a flat-type transformer according to the present invention.
6 is an exploded perspective view illustrating a molding cover member and upper and lower cores constituting a flat-type transformer according to the present invention.
8 is a perspective view of the bobbin assembly constituting the flat-type transformer according to the present invention as viewed from one side.
9 is a perspective view of the bobbin assembly constituting the flat-type transformer according to the present invention as viewed from the other side.
10 is a perspective view of the bobbin body of the bobbin assembly constituting the flat-type transformer according to the present invention as viewed from one side.
11 is a perspective view of the bobbin body of the bobbin assembly constituting the flat-type transformer according to the present invention as viewed from the other side.
12 is a perspective view of the secondary coil connection bracket of the bobbin assembly constituting the flat-type transformer according to the present invention as viewed from one side.
13 is a perspective view of the secondary coil connection bracket of the bobbin assembly constituting the flat-type transformer according to the present invention as viewed from the other side.
13 is a perspective view of a state in which a secondary coil is provided in a bobbin assembly constituting a flat-type transformer according to the present invention as viewed from one side.
14 is a perspective view of a state in which a secondary coil is provided in a bobbin assembly constituting a flat-type transformer according to the present invention as viewed from the other side.
15 is a perspective view of the molding cover member constituting the flat-type transformer according to the present invention as viewed from the upper side.
16 is a perspective view of the molding cover member constituting the flat-type transformer according to the present invention as viewed from the lower side.
17 is a perspective view illustrating a base member constituting a flat-type transformer according to the present invention.

Additional objects, features and advantages of the present invention may be more clearly understood from the following detailed description and accompanying drawings.

Prior to the detailed description of the present invention, the present invention can make various changes and can have various embodiments, and the examples described below and shown in the drawings are not intended to limit the present invention to specific embodiments. No, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

When an element is referred to as being “connected” or “connected” to another element, it is understood that it may be directly connected or connected to the other element, but other elements may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

In addition, terms such as "...unit", "...unit", "...module", etc. described in the specification mean a unit that processes at least one function or operation, which includes hardware or software or hardware and It can be implemented by a combination of software.

In addition, in the description with reference to the accompanying drawings, the same components are given the same reference numerals regardless of the reference numerals, and the overlapping description thereof will be omitted. In describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, throughout this specification, when a step is located “on” or “before” another step, this means not only a case in which a step is in a direct time-series relationship with another step, but also a step of mixing after each step and Likewise, the order of two stages includes the same rights as in the case of an indirect time series relationship in which the time series order can be changed.

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

4 is a perspective view showing a flat-type transformer according to the present invention, FIG. 5 is an exploded perspective view showing a base member constituting a part of the flat-type transformer according to the present invention, and FIG. 6 is a flat-type transformer according to the present invention It is a perspective view showing the disassembled molding cover member and the upper and lower cores constituting the . 8 is a perspective view of the bobbin assembly constituting the flat-type transformer according to the present invention as viewed from one side, FIG. 9 is a perspective view of the bobbin assembly constituting the flat-type transformer according to the present invention as viewed from the other side, and FIG. 11 is a perspective view of the bobbin body of the bobbin assembly constituting the flat-type transformer according to the present invention as viewed from one side, and FIG. A perspective view of the secondary coil connection bracket of the bobbin assembly constituting the flat type transformer according to the present invention as viewed from one side, and FIG. 13 is a perspective view of the secondary coil connection bracket of the bobbin assembly constituting the flat type transformer according to the present invention as viewed from the other side. 13 is a perspective view of a state in which a secondary coil is provided in a bobbin assembly constituting a flat type transformer according to the present invention, as viewed from one side, and FIG. 14 is a secondary coil in the bobbin assembly constituting the flat type transformer according to the present invention. It is a perspective view viewed from the other side in the provided state. 15 is a perspective view of the molding cover member constituting the flat-type transformer according to the present invention as viewed from the upper side, and FIG. 16 is a perspective view of the molding cover member constituting the flat-type transformer according to the present invention as viewed from the lower side, and FIG. 17 is a perspective view showing a base member constituting a flat-type transformer according to the present invention. For reference, in FIG. 5, the primary coil connecting pin and the secondary coil connecting pin are omitted.

In the description of the bobbin assembly to be described below, the primary coil (primary coil) and the secondary coil (secondary coil) are coils divided by a radix expression for distinguishing coils constituting the transformer.

A flat-type transformer according to the present invention, as shown in FIGS. 4 to 17, largely includes bobbin assemblies (A: 100, 200. 250); Molding cover member 300; Upper and lower core members 400: 400A, 400B; insulating tape 450; and a base member 500 .

Specifically, the flat type transformer according to the present invention, as shown in Figs. 8 to 17, a primary coil (primary coil) (not shown) and a secondary coil (secondary coil) (C2) each provided with 1 A bobbin assembly (A: 100, 200) in which a primary coil mounting unit 101 and a secondary coil mounting unit 102 are formed, and a primary coil connecting pin P1 and a secondary coil connecting pin P2 are provided in the same direction, respectively 250); a molding cover member 300 formed by molding while exposing the primary coil connection pin P1 and the secondary coil connection pin P2 to surround and insulate the bobbin assembly (A); Upper and lower core members 400: 400A, 400B provided on the molding cover member 300; an insulating tape 450 provided to surround and fix the upper and lower core members 400; and a base member 500 coupled to the molding cover member 300 on the side where the primary coil connecting pin P1 and the secondary coil connecting pin P2 are provided; characterized in that it comprises a do.

The bobbin assembly (A) is provided with a plurality of layers of primary coils wound around the primary coil mounting unit 101 in the central part, and a donut-shaped secondary coil mounting unit 102 on the upper and lower sides of the primary coil. A secondary coil (C2) is provided, and the secondary coil (C2) is assembled with the upper and lower parts provided, and a secondary coil connecting pin ( It is configured to include a secondary coil connection bracket having a P2), and will be described in more detail with reference to FIGS. 8 to 14 .

The bobbin assembly (A) is largely a bobbin body 100; Secondary coil connection bracket (200); and coupling means 250 .

Specifically, as shown in FIGS. 8 to 14, the bobbin assembly (A) includes a primary coil mounting part 101 having a primary coil (primary coil) wound in the central part, and a pair of upper and lower parts. The secondary coil (secondary coil) (C2) is provided with a secondary coil mounting portion 102 is mounted, a plurality of primary coil connecting pins (P1) on the lower surface of one end is provided with a spaced apart bobbin body 100; a secondary coil connection bracket 200 having one end coupled to the other end of the bobbin body 100 and having a plurality of secondary coil connection pins P2 spaced apart from each other on a lower surface of the other end; and a coupling means 250 configured between the bobbin body 100 and the secondary coil connection bracket 200 and configured to couple the bobbin body 100 and the secondary coil connection bracket 200 to each other; characterized in that

The bobbin body 100 is formed in the form of a pulley as a whole, and a primary coil mounting part 101 having a primary coil (primary coil) wound therein is formed in the central part, and the primary coil mounting part 101 is formed. A secondary coil mounting unit 102 having a pair of secondary coils (secondary coils) C2 mounted on the upper and lower sides of the primary coil mounted on the The pins P1 are configured to be provided to be spaced apart.

More specifically, the bobbin body 100 has a cylindrical central body 110 formed in a cylindrical or polygonal cross-section, and extends outward from the top and bottom of the central body 110, and has a predetermined thickness. and upper and lower flanges 120 (upper flange 120A, lower flange 120B) having a secondary coil mounting slot 102 formed inwardly from one end of each of the upper and lower flanges 120 . .

The space formed between the central body 110 and the upper and lower flanges 120 is a primary coil mounting part 101 in which a primary coil is wound, and the secondary coil mounting slot 102 is a secondary coil, respectively. It becomes a secondary coil mounting part that is inserted.

The secondary coil mounting slot 102 is formed in a direction perpendicular to the thickness direction of the upper and lower flanges 120 , and the inner wall surface is opened. In other words, the secondary coil mounting slot 102 is formed as an annular mounting slot formed to a predetermined depth radially outward from the inside of each of the upper flange 210A and the lower flange 210B, and the secondary coil ( One end is opened so that C2) is inserted and mounted.

Accordingly, the upper and lower flanges 120 are formed of a pair of flange portions, that is, an outer flange portion 121 and an inner flange portion 122 by the formation of the secondary coil mounting slot 102, and these outer flanges The inner wall between the branch portion 121 and the inner flange portion 122 is formed to be opened.

In addition, the outer flange portion 121 has a cutout portion 121a of a predetermined size based on the center line thereof, and also at the other end side of the upper and lower flange portions 120, that is, a secondary coil mounting slot ( 102), the outer side of the outer flange portion 121 and the inner flange portion 122 at the inlet side is formed with a part of the opening.

Accordingly, the outer flange portion 121 can be elastically displaced with respect to the inner flange portion 122 , and in particular, the outer flange portion 121 and the inner flange portion 122 at the inlet side of the secondary coil mounting slot 102 . Both the inner and outer sides of the is formed to be opened, so that elastic displacement of the outer flange portion 121 with respect to the inner flange portion 122 is easily made, and accordingly, the coupling of the coupling means 250 to be described below can be made more easily. can

Here, the primary coil provided in the primary coil mounting part 101 is made of a plurality of coil layers laminated by winding in the radial direction, and the secondary coil provided in the secondary coil mounting slot 102 ( C2) consists of a donut-type bonding coil that is laminated and wound in a spiral shape on a plane.

The stacked winding of the primary coil may be automated, and the secondary coil formed in the spiral shape may be automatically inserted into the secondary coil mounting slot 102 through an automated device.

Each of the primary coil connecting pins (P1) is formed on the lower surface of the end of the lower flange (120), and in the lower flange (120) between these primary coil connecting pins (P1), a guide slot ( 123) is formed.

In addition, a coil end fixing protrusion 124 capable of fixing the input side coil end when the primary coil is wound on the primary coil mounting unit 101 is formed at one end of the upper flange 120A.

Here, a protrusion 124a is formed on the upper surface and/or the lower surface of the end of the coil end fixing protrusion 124 so as not to deviate to the outside when the input side coil end of the primary coil is hung and fixed.

The coil end fixing protrusion 124 is configured in plurality, and is provided to be spaced apart from each other.

The coil end fixing protrusion 124 not only allows the input side coil end of the primary coil to be hooked and fixed, but also prevents wiring cross and provides an extra space for preventing short circuit.

Subsequently, in the bobbin body 100 , a mold fixing protrusion 125 is formed on the outer periphery of at least one of the upper flange 120A and the lower flange 120B.

Specifically, in the bobbin assembly of the present invention, the bobbin assembly (A) is put into a mold in a state in which the primary coil and the secondary coil (C2) are installed and molded to insulate and fix the primary coil and the secondary coil, The molding cover member 300 surrounding the outer side of the bobbin assembly is formed while exposing the lower ends of the primary coil connection pin P1 and the secondary coil connection pin P2. At this time, the mold fixing protrusion 125 is the bobbin The assembly (A) is fixed to the mold (molding mold) (for example, by force fitting contact or by seating and fixing in a seating groove of a shape corresponding to the mold) to maintain a stable fixed state even by the molding pressure during molding. do.

It is preferable that the mold fixing protrusions 125 are formed with a plurality of intervals therebetween.

In addition, the bobbin body 100 is molded on the outer surface (outward-facing surface) of the outer flange portion 121 of the upper and lower flanges 120 of the bobbin body 100 to form the molding cover member 300 . When pressed by the mold, a plurality of pressing protrusions 126 protruding from the outer surface are formed to prevent the coil (secondary coil) C2 from being separated by the molding pressure.

Here, since the inner side of the outer flange portion 121 is opened and a certain amount of elastic displacement is possible, the pressing protrusion 126 is preferably formed along the outer surface of the inner edge side of the outer flange portion 121 . .

In addition, a plurality of distance maintaining protrusions 127 may be formed on the outer surface of the outer flange portion 121 to maintain a predetermined distance from the molding mold during molding.

Here, since the outer flange portion 121 is formed with an open inner side and a closed outer side, the outer side of the outer flange portion 121 has relatively little displacement (elastic deformation), and thus the distance maintaining protrusion 127 is formed on the outer flange portion. It is preferable to be formed along the outer surface of the outer edge side of (121).

The bobbin body 100 may be formed by injection molding in a state in which the primary coil connecting pin P1 is inserted, that is, by insert injection molding.

Next, the secondary coil connection bracket 200 is provided by being coupled to the other end of the bobbin body 100 in a state in which the primary coil and the secondary coil C2 are provided in the bobbin body 100 .

Specifically, as shown in FIGS. 11 and 12, the secondary coil connection bracket 200 is integrally formed with a cubic body block 210 and one end surface of the block body 210, and the At one end of the bobbin body 100, a coupling block 220 that is fitted between the upper flange 120A and the lower flange 120B (that is, the primary coil mounting unit 101), and the body block 210 and At the boundary of the coupling block 220, it protrudes orthogonally from the upper surface and the lower surface of the body block 210, and is formed with an interval from each other to contact the ends of the upper and lower flanges 120 when the coupling block 220 is inserted and coupled. The left and right stopper protruding walls 230 serving as a stopper, and the left and right stopper protruding walls 230 are formed with a gap between them, and the body block 210 is symmetrically partitioned and the body block 210 is It includes a "C"-shaped coil short protection partition wall 240 that is integrally formed.

Secondary coil connection pins P2 are respectively formed on the left and right lower surfaces of the body block 210 with respect to the vertical wall 241 of the partition wall 240 . The secondary coil connection bracket 200 having the secondary coil connection pin P2 may also be formed by insert injection molding.

A secondary coil guide groove 211 is formed in the body block 210 in contact with the vertical wall 241 of the partition wall 240, and at this time, as shown in FIG. 10, the partition wall 240 and the protruding wall for the stopper The gap between the 230 also serves as a passage through which the secondary coil is guided.

Subsequently, the coupling means 250 is formed between the bobbin body 100 and the secondary coil connection bracket 200 to assemble and fix the secondary coil connection bracket 200 to the bobbin body 100 . .

The coupling means 250 may be configured in a coupling method of a hook and a hook groove.

Specifically, the coupling means 250 is at one end of the secondary coil connection bracket 200, that is, the front side of each of the protruding walls 230 for the left and right stoppers of the secondary coil connection bracket 200 (bobbin body 100). It may be formed of a hook protrusion 251 protruding from the surface facing), and a hook fastening hole 252 formed in the outer flange portion 121 of the upper and lower flanges 120 .

The coupling means 250 configured in this way fits the coupling block 220 of the secondary coil connection bracket 200 into the space between the top flange 120A and the bottom flange 120B, and at the same time, the hook protrusion 251 ) is inserted into the hook fastening hole 252, and the bobbin body 100 and the secondary coil connection bracket 200 are assembled and integrated.

Next, the molding cover member 300 exposes the primary coil connection pin P1 and the secondary coil connection pin P2 as described above, and has a central penetrating portion 301 in the center of the bobbin. Molding is formed on the outside of the assembly (A) is made to surround and insulate the bobbin assembly (A).

At this time, the molding cover member 300 is configured such that a base member coupling piece 310 extending outwardly is formed on an outer surface of one side.

The base member coupling piece 310 is fitted into a guide slot 510 formed in a base member 500 to be described later so that the molding cover member 300 and the base member 500 are stably mounted and coupled.

Here, the base member coupling piece 310 also provides a function of satisfying the regulations required in various standards by increasing the creepage distance, which is the insulation distance between conductors in the transformer.

Next, the upper and lower core members 400 are formed of a pair of upper and lower core members 400A and 400B coupled to the upper and lower sides of the molding cover member 300 as shown in FIG. 6 . is done

The upper core member 400A and the lower core member 400 are formed in the same manner, and are formed in the inner central portion to correspond to the central penetrating portion 301 of the molding cover member 300 and the central penetrating portion 301 . An insertion part 410 is formed to be inserted into the The central edge portion of the molding cover member 300 is seated between the 400A) and the lower core member 400B.

The upper core member 400A and the lower core member 400 have a shape surrounding the central portion of the molding cover member 300 .

In this case, the upper core member 400A and the lower core member 400B may be more stably fixed to the molding cover member 300 using an adhesive such as epoxy.

In addition, the insulating tape 450 surrounds the outer sides of the upper core member 400A and the lower core member 400 provided to surround the central portion of the molding cover member 300 to cover the upper core member 400A and the lower core member. (400) is made to fix.

The insulating tape 450 may be formed in the form of a sheet having insulation, and an adhesive layer may be formed on an inner surface of the insulating tape 450 .

Subsequently, as shown in FIGS. 5 and 17, the base member 500 is the molding cover member 300 on the side where the primary coil connection pin P1 and the secondary coil connection pin P2 are provided. Doedoe coupled to, the primary coil connecting pin (P1) and the secondary coil connecting pin (P2) is provided coupled to the molding cover member 300 in a state exposed to the outside.

Specifically, the base member 500 is formed in the form of an enclosure in which an upper surface, a front surface, and a rear surface are opened, and a part of the side surface is cut off.

A guide slot 510 into which the base member coupling piece 310 of the molding cover member 300 is fitted is formed at one end of the base member 500 .

Specifically, the guide slot 510 may be formed between a pair of rails 511 formed along one end of the base member 500 .

Here, the outer rail 511a facing the outside of the pair of rails 511 is formed to be relatively extended to strengthen the coupling of the base member coupling piece 310 and the base member coupling piece 310 . By more reliably isolating between the outside and the inside as a reference, the insulation is further ensured, and the creepage distance by the base member coupling piece 310 can be further extended.

According to the flat-type transformer according to the present invention as described above, it is possible to provide a transformer having excellent insulation, durability, and noise (transformation) shielding properties by introducing a molding method for a component requiring high insulation, and a molding cover It is possible to secure a distance for insulation reinforcement at the same time as the member is formed, so that it is possible to provide an ultra-slim and high-capacity transformer that can satisfy electrical insulation standards.

In addition, according to the present invention, it is possible to make the whole slim (slim) so that a thin transformer can be realized, and it can be applied to high-load (high-capacity transformer) products because of high capacity, coil installation process, molding cover member forming process, etc. Some processes can be automated, which has the advantage of significantly increasing manufacturability and productivity.

In addition, according to the present invention, since the primary coil (ie, the primary coil) provided in the bobbin assembly is not configured in the form of a printed circuit board, a separate manufacturing process for this is excluded, thereby lowering the overall manufacturing cost of the transformer and improving economic efficiency There is an advantage of facilitating the operation because the coil terminal connecting pins to which the primary coil and the secondary coil are connected and fixed can be configured in the same direction.

Although the above-described embodiments have been described with reference to the limited drawings, a person skilled in the art may apply various technical modifications and variations based on the above. For example, the described techniques are performed in an order different from the described method, and/or the described components of the system, structure, apparatus, circuit, etc. are combined or combined in a different form than the described method, or other components Or substituted or substituted by equivalents may achieve an appropriate result.

The embodiments described in this specification and the accompanying drawings are merely illustrative of some of the technical ideas included in the present invention. Accordingly, since the embodiments disclosed in the present specification are for explanation rather than limitation of the technical spirit of the present invention, it is obvious that the scope of the technical spirit of the present invention is not limited by these embodiments. Modifications and specific embodiments that can be easily inferred by those skilled in the art within the scope of the technical spirit included in the specification and drawings of the present invention should be interpreted as being included in the scope of the present invention.

C2: secondary coil
P1: Primary coil connection pin
P2: secondary coil connection pin
A: Bobbin assembly
100: bobbin body
101: primary coil mounting part
102: secondary coil mounting part (secondary coil mounting slot)
110: central body
120: flange
120A: top flange
120A: bottom flange
121: outer flange portion
121a: cutout
122: inner flange portion
123: guide slot
124: coil end fixing projection
124a: protrusion
125: mold fixing projection
126: push button
127: distance keeping turn
200: secondary coil connection bracket
210: body block
220: bonding block
230: protrusion wall for stopper
240: coil short protection partition wall
241: vertical wall
250: coupling means
251: hook turn
252: hook coupling hole
300: molding cover member
301: central penetration
310: base member coupling piece
400: upper and lower core members
400A: upper core member
400B: lower core member
410: insertion part
420: seating part
450: insulation tape
500: base member
510: guide slot
511: rail
511a: outer rail

Claims (12)

a bobbin assembly in which a primary coil mounting part having a primary coil and a secondary coil mounting part having a secondary coil are formed, and a primary coil connecting pin and a secondary coil connecting pin are formed in the same direction at both ends, respectively; a molding cover member molded to surround and insulate the bobbin assembly, the molding cover member being molded to expose the primary coil connection pin and the secondary coil connection pin; an upper and lower core member provided on the molding cover member; an insulating tape provided to surround the upper and lower core members; and a base member coupled to one side of the molding cover member,
The bobbin assembly includes a primary coil mounting unit having a primary coil wound in a central portion and a secondary coil mounting unit having a pair of secondary coils mounted thereon at upper and lower portions, and a plurality of primary coils on a lower surface of one end. a bobbin body having connecting pins spaced apart; a secondary coil connection bracket having one end coupled to the other end of the bobbin body and having a plurality of secondary coil connecting pins spaced apart from each other on a lower surface of the other end; and coupling means formed between the bobbin body and the secondary coil connection bracket and configured to couple the bobbin body and the secondary coil connection bracket;
The bobbin body, the central body of the cylindrical shape; Upper and lower flanges including an upper flange and a lower flange extending outward from each of the upper and lower ends of the central body; and a secondary coil mounting slot formed in each of the upper flange and the lower flange, wherein the secondary coil mounting slot is formed as a ring-shaped mounting slot of a predetermined depth radially outward from the inner side of each of the upper flange and the lower flange It is composed of an outer flange portion and an inner flange portion, respectively, characterized in that one end is opened so that the secondary coil is inserted and mounted.
Flat type transformer.
delete delete According to claim 1,
The upper and lower flanges on the opening side of the upper and lower flanges are characterized in that a cutout of a predetermined size is formed.
Flat type transformer.
According to claim 1,
A guide slot through which the end of the primary coil is guided is formed in the lower flange between the primary coil connecting pins,
At one end of the upper flange, a plurality of coil end fixing protrusions to which one end of the primary coil wound on the primary coil mounting unit are hooked and fixed are formed to be spaced apart.
Flat type transformer.
According to claim 1,
The bobbin body may include one or more mold fixing protrusions formed on the outer periphery of at least one of the upper flange and the lower flange, one or more pressing protrusions formed on a surface facing outward from the upper and lower flanges, and a surface facing outward from the upper and lower flanges Characterized in that it further comprises at least one of the distance maintaining protrusions formed in one or more
Flat type transformer.
7. The method of claim 6,
In at least one of the upper flange and the lower flange, the pressing protrusion is formed with a plurality of intervals on the upper surface of the inner edge side,
The distance maintaining protrusion is characterized in that at least one of the upper flange and the lower flange is formed with a plurality of intervals on the upper surface of the outer periphery.
Flat type transformer.
According to claim 1,
The secondary coil connection bracket includes a body block, a coupling block integrally protruding from one end surface of the body block and fitted to the primary coil mounting portion at one end of the bobbin body, and the body block and the coupling block The left and right stopper protruding walls protruding orthogonally from the boundary of Including a coil short prevention partition wall,
A secondary coil guide groove is formed in the body block in contact with the vertical wall of the partition wall,
Characterized in that the secondary coil connecting pins are formed on both sides of the lower surface of the body block with respect to the vertical wall.
Flat type transformer.
9. The method of claim 8,
The coupling means,
a hook protrusion protruding from one end of the secondary coil connection bracket; and
characterized in that it comprises a hook fastening hole formed in the flange portion of the opening side of the secondary coil mounting slot
Flat type transformer.
According to claim 1,
The molding cover member, exposing the primary coil connection pin and the secondary coil connection pin, has a central penetrating portion in a central portion and is molded on the outside of the bobbin assembly, and a base member coupling piece extending outwardly on one outer surface is formed becomes,
The upper and lower core members include a pair of upper and lower core members having an insertion portion fitted to a central penetration portion of the molding cover member and coupled to upper and lower sides of the molding cover member.
Flat type transformer.
11. The method of claim 10,
The base member is formed in the form of an enclosure in which the upper surface, the front and the rear are open, and a part of the side is cut,
A guide slot into which the base member coupling piece of the molding cover member is fitted is formed at one end of the base member
Flat type transformer.
12. The method of claim 11,
The guide slot is formed between a pair of rails formed along one end of the base member,
The outer rail facing the outside of the pair of rails is formed to extend more than the inner rail
Flat type transformer.

Images