KR200423579Y1 - A Terminal Structure for Transformer Module - Google Patents

Abstract

The present invention relates to a terminal structure of a bobbin for a transformer divided into a first coil winding part and a second coil winding part around a coil partition, particularly, a buried terminal part having a predetermined shape and size of a metal material; A surface mount terminal portion which is integrally exposed with the buried terminal portion and which contacts a printed circuit board with a predetermined thickness and length in a three-dimensional shape; And bent integrally with the buried terminal and bent first in the transverse direction of the transformer bobbin, and then bent second to the bottom of the bobbin at predetermined intervals, and then the end thereof is bent in the third direction in the axial direction of the transformer bobbin again. Providing a transformer bobbin terminal structure, characterized in that it is composed of a soldering terminal portion can not only facilitate the operation of the winding machine, but also has a two-dimensional structure can be designed to thin thickness around the terminal of the bobbin.

Transformers, Bobbins, Transformers, Wires, Terminals

Description

Bobbin terminal structure for transformers {A Terminal Structure for Transformer Module}

1 is an exploded perspective view of a transformer using a bobbin according to the prior art

2 is a front view of a bobbin for a coil wound transformer according to the prior art

3 is a perspective view for explaining a bobbin terminal structure for a transformer according to the present invention;

<Explanation of symbols for the main parts of the drawings>

120: coil winding 150: terminal board

151: coil terminal 151a: surface mount terminal portion

151b: soldering terminal portion 151c: buried terminal portion

170: protrusion

The present invention relates to a transformer bobbin used in a backlight unit for an LCD TV or LCD monitor, and in particular, a bobbin terminal for a transformer for reducing the mounting height of the bobbin and the smooth operation of the winding machine for winding a coil to the bobbin. It's about structure.

Recently, with the development of display devices, LCD monitors and LCD TVs are widely used. LCDs have fluorescent tubes driven at high voltages for a back light system, typically an inverter with a drive circuit is used to drive the fluorescent tube and the inverter has a high voltage transformer.

Therefore, the transformer used to minimize the size needs to have a thin plate type structure.

A transformer is a device that increases or decreases the voltage of an alternating current. In general, primary and secondary coils on the low and high voltage sides are wound around a bobbin whose core is inserted into the hollow portion of the bobbin. Is produced.

One low voltage coil called the primary coil is connected to the input circuit to change the voltage, and the other high voltage coil called the secondary coil is connected to the output circuit using the changed (converted) voltage. When the light passes through the primary coil, a magnetic field is generated in which intensity and direction change in response to the AC current. The change in magnetic flux induces an alternating voltage in the secondary coil and the winding ratio in each coil determines the transformer ratio.

In the case of such a thin plate type high voltage transformer, the number of windings of the high voltage coil is much larger than that of the low voltage coil, so the current flowing in the high voltage coil is very small compared to the current flowing in the low voltage coil. Much thinner than low pressure coils.

In addition, the high-voltage coil winding portion of the bobbin is wound in one continuous coil is spatially separated by a number of slits to facilitate the heat dissipation generated from the coil, so that both ends of the coil are spaced to some extent When the coil is connected to the high voltage terminal of the transformer formed on one side of the bobbin, one end of the coil is connected to one terminal of the high voltage terminal by a lead wire extending from the first end of the coil. . At this time, the leader line is spaced apart from the high voltage coil by a length of the terminal board to prevent a short circuit with a part of the high voltage coil.

A thin plate type high voltage transformer according to the related art will be described with reference to FIGS. 1 and 2 as follows.

As shown in the drawing, the conventional transformer 1 integrally forms the low voltage terminal board 13 and the high voltage terminal board 11 having the low voltage coil terminal 14 and the high voltage coil terminal 12 on both sides. The bobbin body part which formed the core insertion hollow part 17 so that the "E" type core 5 of the same width as the horizontal length of a terminal board can be inserted in both directions between the board | substrates 11 and 13, and A coil partition 15 that divides the outer circumferential surface of the bobbin body portion into a low pressure coil winding portion 19 and a high pressure coil winding portion 18, and a plurality of slits 16 that divide the high pressure coil winding portion 18 at regular intervals. It consists of a combination of the bobbin 10 and the middle core inserted into the core insertion hollow portion 17 of the bobbin 10 and the "E" type core 5 formed of the external core integral with the heavy core.

Referring to FIG. 2, the bobbin 10 has a high pressure coil 2 and a low pressure coil 3 below the terminal boards 11 and 13 on both sides of the low pressure coil terminal 14 and the high pressure coil terminal 12. The lead-out path 20 to which each of the high-pressure coil lead-out line 2-1 and the low-pressure coil lead-out line 3-1 is guided so as to be electrically connected to each other is connected to the terminal boards 11 and 13 at a predetermined depth. It is formed in the rear part.

The low voltage coil terminal 14 and the high voltage coil terminal 12 may be divided into terminal parts 12a and 14a for soldering and terminal parts 12b and 14b for surface mounted devices (SMDs) on a printed circuit board. The terminal portions 12a and 14a for soldering may protrude in a shape having a predetermined length.

Therefore, the soldering terminal portion 12a of the high voltage coil terminal 12 to which the high pressure coil is connected has a straight end, so that after the drawn high pressure coil 2-1 is wound, there is a problem of slipping out before soldering, and the high pressure coil 2 Since 1) is a thin coil, there is a fear that the high pressure coil (2-1) is disconnected due to the heating temperature generated when soldering by soldering.

Accordingly, these problems must always be taken into account in the manufacture of the transformer 1, thus reducing the efficiency of the process and the time required for the process.

In order to solve this problem, the proposed technique is to bend a soldering terminal part which is soldered by binding with the high voltage coil drawn out of the high voltage coil terminals formed on both terminal boards in the bobbin structure of the transformer used in the inverter at a predetermined angle. It is a technique as described in the Republic of Korea Utility Model Registration Application No. 20-2005-0020647 to change the shape so that the high-pressure coil can be tightly bound without falling out.

However, since the bobbin terminal structure of the prior art has a three-dimensional shape, the winding operation of the winding machine needs to be large, and the height of the vicinity of the final terminal of the bobbin is increased.

An object of the present invention for solving the above-mentioned problems is to provide a transformer bobbin terminal structure for reducing the mounting height of the bobbin and the smoothness of the winding operation of the winding machine winding the coil to the bobbin.

Characteristic of the transformer bobbin terminal structure according to the present invention for achieving the above object, is divided into the first coil winding portion and the second coil winding portion centered on the coil partition wall is provided with a drawer of the coil wound on the bottom A terminal structure of a transformer bobbin having a projecting portion projecting to a predetermined size on the lead-out path, comprising: a buried terminal portion having a predetermined shape and size of a metal material; A surface mount terminal portion which is integrally exposed with the buried terminal portion and which contacts a printed circuit board with a predetermined thickness and length in a three-dimensional shape; And bent integrally with the buried terminal and bent first in the transverse direction of the transformer bobbin, and then bent second to the bottom of the bobbin at predetermined intervals, and then the end thereof is bent in the third direction in the axial direction of the transformer bobbin again. It consists of a soldering terminal part.

An additional feature of the transformer bobbin terminal structure according to the present invention for achieving the above object is that the tertiary bent portion of the solder terminal portion is formed in the exposure direction on the same plane line with the protrusion.

The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

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

3 is a main part perspective view for explaining the bobbin terminal structure for a transformer according to the present invention, and description of the bobbin terminal according to the present invention will be described only by omitting description of a general bobbin.

As shown in the drawing, the terminal board 150 is formed integrally with the coil winding 120 and includes a coil terminal 151 of a predetermined length embedded in a predetermined depth. In addition, a groove of a predetermined depth is formed on a lower surface of the terminal board 150 so that a coil (not shown) may be wound around each coil terminal 151 and the groove may support the drawn high pressure coil. It serves as a drawer 160.

In addition, the coil terminal 151 is buried in the terminal portion 151a which is surface-mounted (SMD) when the bobbin is mounted on the printed circuit board, the soldering terminal portion 151b and the terminal substrate 150 which are bound and soldered to the coil. It can be divided into the terminal portion 151c.

The buried terminal portion 151c is a portion embedded in the terminal substrate 150 and is integrally formed with a metal with the surface mount terminal portion 151a and the solder terminal portion 151b protruding to the outside of the terminal substrate 150. Is formed to form a single coil terminal 151.

The surface-mount terminal portion 151a is a portion where one side of the buried terminal portion 151c protrudes to the outside with a predetermined thickness and length. The terminal portion is a wide terminal portion, and the end portion is formed in a “b” shape and directly on the printed circuit board. In contact with the formed pattern is soldered (soldered).

In addition, the lower surface of the rear terminal substrate 150 in a line with the solder terminal portion 151b includes a protrusion 170 protruding to a predetermined size on the lead-out path 160, which is a coil with the protrusion 170 The soldering terminal portion 151b is wound together to further solidify the binding and to be drawn out to the coil winding 120 to allow the coil to be wound in accordance with the turns ratio.

At this time, the soldering terminal portion 151b is formed so that one side of the buried terminal portion 151c protrudes out of the terminal substrate 150 in the same direction as the surface mount terminal portion 151a, and is spaced a predetermined distance from the terminal substrate 150. It is preferably formed to be bent in the transverse direction of the terminal substrate 150 at an angle of 90 ㅀ, and then a part of the member of the bent terminal is bent at an angle of 90 ㅀ back to the bottom of the second bent shape A portion of the end portion is formed to be bent at an angle of 90 degrees again in the protruding direction on the same plane line with the protrusion 170.

Therefore, the coil wound together with the protrusion 170 so as not to fall out.

While the invention has been shown and described in connection with specific embodiments, it is understood that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

Providing the transformer bobbin terminal structure according to the present invention as described above not only facilitates the operation of the winding machine, but also has a two-dimensional structure can be designed to thin thickness around the terminal of the bobbin.

Claims (2)

In the terminal structure of the bobbin for transformers, which is divided into a first coil winding part and a second coil winding part around a coil partition wall, and has a drawing path of a coil wound on a bottom thereof, and has a protrusion projecting to a predetermined size on the drawing path. : A buried terminal portion having a predetermined shape and size of a metallic material; A surface mount terminal portion which is integrally exposed with the buried terminal portion and which contacts a printed circuit board with a predetermined thickness and length in a three-dimensional shape; And It is exposed integrally with the buried terminal part and is first bent in the transverse direction of the transformer bobbin, and then secondly bent to the bottom of the bobbin at a predetermined interval, and then the end thereof is bent in the third direction in the axial direction of the transformer bobbin. A bobbin terminal structure for a transformer, characterized by comprising a terminal portion. The method of claim 1, The tertiary bent portion of the solder terminal portion is characterized in that the bobbin terminal structure for the transformer, characterized in that formed in the exposure direction on the same plane line and the projection.

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