KR200312344Y1 - Choke coil - Google Patents

Abstract

The present invention relates to a choke coil. According to an aspect of the present invention, a choke coil includes: a base; and a drum core fixed to an upper portion of the base and having a plurality of windings disposed in a vertical direction; A plurality of wires wound on the respective winding parts and electrically insulated from each other; And a plurality of leads provided below the base and electrically connected to each end of the plurality of wires one by one. According to the choke coil according to the present invention, since two choke coils can be replaced with one choke coil, the total volume of the product in which the choke coil is used can be reduced, and the production cost and workmanship of the relative choke coils are reduced. Due to the reduction, the manufacturing cost of the product in which the choke coil is used can be reduced.

Description

Choke Coils

The present invention relates to a choke coil, and more particularly to a choke coil capable of replacing a plurality of choke coils with one choke coil.

In general, choke coils are used to eliminate noise in many electronics, such as speaker-side circuits in DVD receivers or digital amplifiers. In the conventional choke coil, one wire of copper is wound around one winding part provided in a drum-shaped core, and leads are electrically connected to both ends of the wire and mounted on a circuit board.

By the way, for example, the DVD receiver which is widely used as an example, in the case of the 5.1-channel DVD receiver, 12 conventional choke coils are used, 14 for the 6.1 channel, 16 for the 7.1 channel, the size of the product and the number of parts It is difficult to reduce the manufacturing cost of the product because it is an obstacle to the recent electronic products in pursuit of minimization and also requires a lot of work for the assembly of the product.

An object of the present invention is to provide a choke coil capable of winding a plurality of wires in an insulated state on one drum core, respectively.

1 is a schematic perspective view of a choke coil according to an embodiment of the present invention,

FIG. 2 is a schematic separation perspective view of line II-II of the choke coil shown in FIG. 1;

3 is a perspective view from below of the choke coil shown in FIG. 1;

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

1 ... choke coil 10 ... base

22 ... upper windings 23 ... lower windings

32 ... upper wire 34 ... lower wire

42 ... first lead 44 ... second lead

46 ... 3rd Lead 48 ... 4th Lead

50 ... cover

In order to achieve the above object, the choke coil according to the present invention includes: a base; and a drum core fixed to an upper portion of the base and having a plurality of winding parts disposed in an up and down direction; and wound around the winding parts, and electrically connected to each other. A plurality of insulated wires; And a plurality of leads provided below the base and electrically connected to each end of the plurality of wires one by one.

According to the present invention, it is preferable that it further comprises a cover portion surrounding the drum core and fixed to the base.

According to this invention, it is preferable that the said some lead is a pin-shaped lead.

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

1 is a schematic perspective view of a choke coil according to an embodiment of the present invention, FIG. 2 is a schematic cross-sectional view taken along line II-II of the choke coil shown in FIG. 1, and FIG. 3 is a bottom view of the choke coil shown in FIG. 1 from below. It is a schematic perspective view when seen.

The choke coil of this embodiment is composed of a base 10, a drum core 20, a plurality of wires and a plurality of leads.

The base 10 has a cylindrical shape in which a lower diameter is slightly larger than an upper diameter, and includes a base groove 12 and a protrusion 14.

All four base grooves 12 are provided along the periphery of the base 10 at intervals of 90 degrees from each other. Each base groove 12 functions to accommodate the wire 30 to be described later.

The protrusions 14 are formed at the bottom of the base to protrude downward four out of each other 90 degrees apart. The protrusion 14 is fitted into a groove provided in the circuit board (not shown) corresponding to the protrusion 14 to guide the choke coil 1 on the circuit board, and to be firmly mounted on the circuit board. To help.

The drum core 20, which is used as a magnetic core, is made of nickel-zn (Ni-Zn) -based ferrite for high frequency in the present embodiment, and is made of epoxy or the like on top of the base 10. The upper winding part 22 and the lower winding part 23 which are fixed by the adhesive agent and arranged in the up-down direction are provided.

An upper flange 24 is provided above the upper winding part 22, and an intermediate flange 26 is provided between the upper winding part 22 and the lower winding part 23. The lower flange 28 is formed in the lower portion of the lower winding part 23 to the same thickness as the upper flange 24. At this time, it is preferable that the intermediate flange 26 is formed thicker than the upper and lower flanges 24 and 28 in order to reduce mutual interference of electric fields generated in the upper winding portion 22 and the lower winding portion 23, respectively. .

The upper flange 24, the middle flange 26, and the lower flange 28 each have four grooves 25, 27, and 29 spaced apart from each other by 90 degrees so as to correspond to the base grooves 12 of the base. In each case, when the drum core 20 is fixed to the upper portion of the base 10, the base grooves 12 of the base and the grooves 25, 27, 29 of the drum core 20 are the same position. Are placed to come in. In this case, the groove 25 formed in the upper flange 24 may not be provided, but in the present embodiment, it is advantageous to simultaneously form grooves in the upper, middle, and lower flanges 24, 26, 28 in manufacturing. It is.

The plurality of wires in the present embodiment consists of an upper wire 32 and a lower wire 34, the surface of which is polyurethane enamelled copper, respectively, the upper winding part 22 and the lower winding part. It is wound around (23). The upper and lower wires 32 and 34 are wound around the respective winding parts so as not to contact each other and are electrically insulated.

As shown in FIGS. 1 and 3, the upper wire 32 starts to be wound on the upper winding part 22 in a state in which a predetermined length of one end portion is exposed to the outside and wound to a desired degree. . That is, both ends are wound so that they can protrude outward and extend. Thus, both end portions exposed to the outside of the upper wire 32 wound around the upper winding part 22 are formed in the intermediate flange 26 and formed in the groove 27 and the lower flange 28. 29) and extends downward through the base grooves 12 formed in the base 10, respectively.

In addition, the lower wire 34 wound around the lower winding section 23 is also wound in such a manner that the upper wire 32 is wound, and both end portions thereof extend downward.

The plurality of leads are provided in the lower portion of the base 10, and are pin-shaped leads that can be fixed by soldering or the like after being inserted into holes provided in the circuit board. In this embodiment, the first lead 42 and the second lead ( 44), the third lead 46 and the fourth lead 48 are all composed of four.

Each of the first lead 42 and the second lead 44 has a lower portion via the groove 27 of the intermediate flange 26, the groove 29 of the lower flange 28, and the groove 12 of the base. Both ends of the upper wire 32 extending down to the connecting portions 43 and 45, which are portions close to the base 10 of the first and second leads 42 and 44, are each bent in a hooked state, and then soldered. And the like are electrically connected and fixed. That is, one end of the upper wire 32 is connected to the first lead 42, and the other end of the upper wire 32 is connected to the second lead 44.

In addition, as in the case of the first and second leads 42 and 44, one end of the lower wire 34 is connected to the third lead 46, and the lower wire 34 is connected to the fourth lead 48. The other end of is connected.

The cover part 50 is made of nickel-zinc (Ni-Zn) -based ferrite, and has a cylindrical structure having the same diameter as that of the lower part of the base 10, as shown in FIGS. 1 and 2. Likewise assembled to the base 10 is fixed with an adhesive such as epoxy. The cover part 50 protects the wire 30 wound around the drum core 20 and the winding parts 22 and 24 of the drum core 20 from the outside, and serves to electrically reduce interference with the outside. .

On the other hand, although not shown, a flame-resistant PVC tube is wrapped over the outer surface of the cover 50 of the choke coil 1 of the present embodiment and a part of the base 10 exposed to the outside, the outer surface of the PVC tube choke The electrical specifications of the coil are printed.

The effect of the choke coil 1 by this Example is demonstrated.

The choke coil 1 is wound on the drum core 20 having two winding parts 22 and 23 in a state in which upper and lower wires 32 and 34 are electrically insulated from each other. 22, the upper wire 32 wound at its both ends electrically connected to the leads 42 and 44, respectively, serves as a choke coil in which one wire is wound around one conventional winding, and the lower winding The lower wire 34 wound on the part 23 and electrically connected at both ends thereof to the leads 46 and 48 also serves as a choke coil in which one wire is wound on a conventional winding part.

That is, one choke coil 1 according to the present embodiment occupies an area similar to the area occupied by one conventional choke coil in a circuit board as compared with the conventional one, but may serve as two conventional choke coils in an electric circuit. will be.

Since the choke coil 1 of this embodiment is provided with two winding parts 22 and 24 up and down in one choke coil 1, it can wind and use the wire 32 and 34 made of copper, respectively, It is possible to obtain an effect that two choke coils, which are separately mounted and used on a circuit board, can be replaced with one choke coil 1. As a result, it is possible to reduce the total volume of the product using multiple choke coils and to reduce the manufacturing cost of the product using the choke coil due to the reduction of the production cost and the labor cost of the choke coil itself. have.

In addition, the choke coil 1 of the present embodiment is provided with a cover part 50, so that the upper and lower wires 32 and 34 wound around the upper and lower winding parts 22 and 24, respectively, can be blocked and protected from the outside. In addition, due to the electromagnetic waves generated from the upper and lower wires (32, 34) can also reduce the damage that may occur to other external components.

In addition, since the plurality of leads of the choke coil 1 of this embodiment has a pin shape, there is an effect that it is easy to attach to the circuit board.

In this embodiment, the winding portion of the drum core 20 is assumed to be two as the upper and lower winding portions 22 and 24. However, the present invention is not limited thereto. When the internal conditions of the product to which the choke coil is mounted allow, the wire It can also be a drum core that can be wound three or four, in this case, the number of windings and leads can be increased accordingly.

In addition, in this embodiment, although the cover part 50 was mentioned as an example, in some cases, the cover part 50 may not be provided. In this case, other effects other than those obtained by the cover part 50 can be sufficiently obtained.

In the present embodiment, the plurality of leads are described as being pin-shaped, but the present invention is not limited thereto. In the case where the size of the choke coil is relatively large, other shapes may be formed, for example, SMD type.

As described above, according to the choke coil according to the present invention, since a conventional choke coil may be replaced with a single choke coil, a total volume of a product in which multiple choke coils are used may be reduced. The production cost of choke coils can be reduced due to the reduction of manufacturing cost and workmanship of the choke coil material.

Claims (3)

Base; A drum core fixed to an upper portion of the base and having a plurality of windings disposed in a vertical direction; A plurality of wires wound on the respective winding parts and electrically insulated from each other; And And a plurality of leads provided below the base and electrically connected to each end of the plurality of wires one by one. The method of claim 1, The choke coil, characterized in that it further comprises a cover portion surrounding the drum core and fixed to the base. The method of claim 1, And said plurality of leads is a pin-shaped lead.