JP2014116336A - Coil component - Google Patents

Abstract

Provided is a coil component that can be easily reduced in size and height and can position a core with high accuracy, and thus can reliably obtain desired characteristics.
A cylindrical winding part 2 around which a wire 8a forming a coil 8 is wound on an outer periphery, and a terminal 6 integrally formed at both ends of the winding part 2 and having ends of the wire entangled. A pair of bobbins 1 having terminal blocks 3a and 3b in which are installed are opposed to each other with the axis of the winding portion 2 parallel to each other, and from each end side of the pair of winding portions 2 The leg 11a of the core 11 is inserted into the winding part 2, and the terminal blocks 3a and 3b are engaged with the other terminal blocks 3b and 3a facing each other in the axial direction and the relative direction. Engaging portions 4 and 5 that determine the position are formed.
[Selection] Figure 2

Description

  The present invention relates to a coil component used as a common mode choke coil or a normal mode choke coil.

  Conventionally, as can be seen in the following Patent Document 1, since the toroidal type and the U-shaped core used in the common mode choke coil are integrally formed, it takes time and effort to wind the wire. There was a problem of requiring.

  Therefore, as a core, a common mode in which a wire is wound around a pair of divided U-shaped or E-shaped cores and these are arranged opposite to each other to form a mouth-shaped core or a Japanese-shaped core. A choke coil is also used.

  However, in the common mode choke coil, since the winding space in each divided core is limited, the overall size and thickness are increased, and in recent years, the size and height have been reduced. There was a problem that it was difficult to respond to the request. In addition, there is a problem in that misalignment is likely to occur when positioning the pair of cores, and as a result, the characteristics are likely to deteriorate.

JP 2006-351860 A

  The present invention has been made in view of the above circumstances, and can easily achieve downsizing and low profile, and can position the core with high accuracy, and thus reliably obtain desired characteristics. It is an object of the present invention to provide a coil component that can be used.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a cylindrical winding portion around which a wire forming a coil is wound on the outer periphery, and the wire rod is integrally formed at both ends of the winding portion. A pair of bobbins provided with terminal blocks on which terminals of which the ends of the windings are entangled are arranged opposite to each other with the axes of the winding portions being parallel to each other, and at both ends of the pair of winding portions A U-shaped core is formed by inserting the leg portion of the U-shaped core into the winding portion, and the terminal block is engaged with the other terminal block facing each other. An engagement portion for determining a relative position in the axial direction and the facing direction is formed.

  The invention according to claim 2 is the invention according to claim 1, wherein the terminal block on the one end portion side of the bobbin has a short side portion extending from the one end portion of the winding portion in the axial direction; The terminal block on the other end side is formed in an L shape having a long side portion bent at right angles from the tip of the short side portion, and is orthogonal to the axis from the other end portion of the winding portion. Formed in an L shape having a long side portion extending in the direction and a short side portion extending in the axial direction from the base end portion of the long side portion, and the engagement portion is configured. The pair of bobbins abut the side surfaces of the long side portions of each other, and abut the front end surface of the long side portion of one of the terminal blocks to the side surface of the short side portion of the other terminal block Therefore, they are positioned with respect to each other.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, at the end of the winding portion, a first step portion having a larger outer dimension than the winding portion and the first step portion are provided. A second step portion having an outer dimension larger than that of the step portion is formed, the wire is wound between the first step portions in the winding portion to form a coil, and the second step portion is formed. An insulating tape covering the outer periphery of the coil is wound between the portions.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, the coil parts are arranged in a direction opposite to the pair of winding portions, and the wire rods are opposite to the square core. It is a common mode choke coil wound so that a magnetic flux is formed.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to third aspects, the coil parts are arranged in the same direction with the pair of winding portions, and the wire rods are in the same direction with the mouth-shaped core It is a normal mode choke coil wound so that a magnetic flux is formed.

  According to the invention according to any one of claims 1 to 5, since the wire forming the coil is wound around the pair of cylindrical winding portions, the winding work is easy and the winding Since the winding space can be provided over the entire length of the portion, it is possible to reduce the size and height.

  In addition, when forming the mouth-shaped core by inserting the leg portions of the U-shaped core from the both ends of the pair of winding portions, the other terminal block facing the terminal block is formed. Since the engaging portion for determining the relative position in the axial direction and the opposing direction is formed by engaging with each other, the U-shaped core can be positioned easily and reliably. As a result, the core can be positioned with high accuracy, and thus desired characteristics can be obtained with certainty.

  According to the second aspect of the present invention, the pair of bobbins having the same shape are brought into contact with the side surfaces of the long sides of the L-shaped engaging portions, and the length of one terminal block is Since the tip end surface of the side portion is brought into contact with the side surface of the short side portion of the other terminal block, the mutual positioning can be performed, so that the operation is easy and the economy is excellent.

  Furthermore, according to the invention described in claim 3, in addition to being able to reliably position the insulating tape, it is possible to cover the outer periphery of the coil without any gap by the insulating tape. Insulation with respect to the bobbin winding can be ensured.

  Therefore, the coil component of the present invention can be suitably used as a common mode choke coil by winding as in the invention described in claim 4, and can also be used as in the invention described in claim 5. By applying wires and connections, it can be suitably used as a normal mode choke coil.

It is a top view which shows the bobbin shape in one Embodiment of the coil components of this invention. It is an exploded view of the one embodiment. It is a top view which shows the said one Embodiment. It is the front view which looked at the core insertion part of FIG. 3 only in cross section. It is a wiring diagram at the time of applying the said one Embodiment to a common mode choke coil. It is a wiring diagram at the time of applying the said one Embodiment to a normal mode choke coil.

1 to 4 show an embodiment in which the coil component of the present invention is applied to a common mode choke coil, and reference numeral 1 in the figure denotes a bobbin.
The bobbin 1 is generally composed of a winding part 2 formed in a rectangular cylindrical shape and terminal blocks 3 a and 3 b integrally formed at both ends of the winding part 2. Here, the terminal blocks 3a and 3b are plate-like members formed so that the surface thereof is flush with the inner wall on the long side of the through hole of the winding part 2, and the long side part 4 and the short side part are formed. It is formed in the L-shape of the same dimension which consists of the side part 5. In FIG.

  However, the terminal block 3 a on one end side of the winding part 2 is formed such that the tip of the L-shaped short side part 5 is continuous with one side of the one end part of the winding part 2. As a result, the terminal block 3a is formed so that the short side portion 5 extends in the axial direction from one end portion of the winding portion 2, and is long as if bent at a right angle from the tip of the short side portion 5. Sides 4 are formed.

  On the other hand, the terminal block 3b on the other end side of the winding part 2 has a long side part 4 formed on one side of the other end part of the winding part 2 in a direction perpendicular to the axis. A short side portion 5 is formed at the base end portion of the side portion 4 so as to extend in the axial direction.

Further, the length dimension of the short side part 5 in the axial direction is formed to be equal to the width dimension of the long side part 4, and the long side part 4 and the short side part 5 form the adjacent bobbin 1. The engaging portion is formed.
And the terminal 6 which is the front-end | tip part of the short side part 5 of the terminal blocks 3a and 3b of both ends, and the edge part of a wire rod is entangled in the side surface 5b on the opposite side to the extension direction of the long side part 4, respectively. It has been planted.

  On both ends of the other winding part 2, first step parts 7 each having an outer dimension larger than that of the winding part 2 are formed over the entire circumference. The first step portion 7 is formed to have a height dimension substantially equal to the height dimension of the coil 8 formed by winding the wire 8 a around the winding portion 2. Further, a second step portion 9 having an outer dimension larger than that of the first step portion 7 is similarly formed on the end portion side of the first step portion 7 over the entire circumference. The height of the second step 9 with respect to the first step 7 is set to be approximately equal to the thickness of the insulating tape 10 wound around the outer periphery of the coil 8.

  And while the wire 8a is wound between the 1st step parts 7 of the coil | winding part 2, the coil 8 is formed, and the edge part of the wire 8a is each the terminal planted by the terminal block 3a, 3b 6 is entwined. An insulating tape 10 is wound around the outer periphery of the coil 8 across the second stepped portion 9.

  As shown in FIG. 2, the pair of bobbins 1 having the same shape on which the windings and the insulating tape 10 are applied as described above are obtained by rotating one bobbin 1 by 180 ° with respect to the other bobbin 1 in a plan view. Are arranged opposite to each other with their axes parallel to each other. And these bobbins 1 insert both the long side part 4 of each terminal block 3b between the long side part 4 of the terminal block 3a of the adjacent bobbin 1, and the 2nd step part 9, and thereby both terminals The front end surface 4a of the long side part 4 of the bases 3a and 3b is brought into contact with the side face 5a of the short side part 5 of the opposing terminal bases 3b and 3a, and the side faces 4b of the long side parts 4 are brought into contact with each other. Therefore, they are positioned in the axial direction and the opposing direction.

  The leg portions 11a of the U-shaped core 11 are inserted into the through-holes of the winding portion 2 from both ends of the winding portion 2 of the pair of bobbins 1, and as shown in FIG. The face-shaped core as a whole is formed by bonding and fixing the surfaces. Further, as shown in FIG. 4, these cores 11 are also fixed to the outer surface of the second step portion 9 of the winding portion 2 by an adhesive 12.

  Here, in the common mode choke coil according to the present embodiment, as shown in FIGS. 5A and 5B, the wire 8a is formed with a magnetic flux in the opposite direction on the mouth-shaped core in the winding portion 2, respectively. It is wound to be. More specifically, when viewed in the same axial direction, the wire 8a is wound around one winding part 2 in the clockwise direction and wound around the other winding part 2 in the counterclockwise direction. ing. Both ends of the wire 8a are connected to terminals 6 implanted in the terminal blocks 3a and 3b, respectively.

FIG. 5 shows another embodiment in which the coil component of the present invention is applied to a normal mode choke coil.
In this other embodiment, as shown in FIGS. 6 (a) and 6 (b), the wire 8a is formed in the pair of winding portions 2 so that the magnetic flux in the same direction is formed in the mouth-shaped core. It is wound around. That is, when viewed in the same axial direction, the wire 8a is wound around the two winding portions 2 in the same direction, and both ends are connected to the terminals 6 implanted in the terminal blocks 3a and 3b, respectively. And the terminal 6 of the terminal block 3a of one bobbin 1 is used as an input terminal, and the terminal 6 of the terminal block 3b of the bobbin 1 and the terminal 6 of the terminal block 3a of the other bobbin 1 are connected by a wire 8a. The terminal 6 of the terminal block 3b of the other bobbin serves as an output terminal.

  According to the common mode choke coil or the normal mode choke coil having the above configuration, since the wire 8a forming the coil 8 is wound around the pair of cylindrical winding portions 2, the winding work is easy. In addition, since the entire length of the winding portion 2 can be used as a winding space, it is possible to reduce the size and the height of the winding portion 2.

  In addition, when the leg portions 11a of the U-shaped core 11 are inserted into the through holes from both ends of the pair of winding portions 2, respectively, the terminal blocks 3a and 3b are formed. In addition, since the L-shaped engaging portions each composed of the long side portion 4 and the short side portion 5 are formed and the positioning in the axial direction and the opposing direction is performed, the U-shaped shape can be easily and reliably formed. The core 11 can be positioned. As a result, the core 11 can be positioned with high accuracy, and thus desired characteristics can be reliably obtained.

  Further, the pair of bobbins 1 having the same shape are brought into contact with the side surfaces 4b of the long side portions 4 in the L-shaped engaging portions, and are formed on the terminal blocks 3a and 3b of one bobbin 1. Since the front end surface 4a of the side portion 4 is brought into contact with the side surface 5a of the short side portion 5 of the terminal block 3a, 3b of the adjacent bobbin 1, the positioning can be performed, so that the operation is easy. In addition, since it can be constituted by one kind of bobbin 1, it is excellent in economic efficiency.

  Further, a first step portion 7 having an outer dimension larger than that of the winding portion 2 and a second step portion 9 having an outer dimension larger than that of the first step portion 7 are provided at the end of the winding portion 2. The coil 8 formed by winding the wire 8a between the first step portions 7 of the winding portion 2 is disposed, and the insulating tape 10 covering the outer periphery of the coil 8 is wound between the second step portions 9 Therefore, the insulating tape 10 can be reliably positioned, and the outer periphery of the coil 8 can be covered with the insulating tape 10 without a gap, so that the insulating property of the core 11 and the adjacent bobbin 1 with respect to the coil 8 can be ensured. Can be secured.

DESCRIPTION OF SYMBOLS 1 Bobbin 2 Winding part 3a, 3b Terminal block 4 Long side part 4a Tip surface 4b Side surface 5 Short side part 5a Side surface 6 Terminal 7 1st step part 8 Coil 8a Wire 9 Second step part 10 Insulating tape 11 Core

Claims (5)

  A cylindrical winding portion around which a wire forming a coil is wound on the outer periphery, and a terminal block in which terminals are integrally formed at both ends of the winding portion and the ends of the wire are entangled. A pair of bobbins having a pair of bobbins are arranged opposite to each other with the axis of the winding portion parallel to each other, and the leg portions of the U-shaped core from the both end sides of the pair of winding portions are in the winding portion. A mouth-shaped core is formed by being inserted, and an engaging portion is formed on the terminal block to engage the other opposing terminal block and determine the relative position in the axial direction and the opposing direction. Coil parts characterized by being made. The terminal block on one end side of the bobbin has a short side portion extending from the one end portion of the winding portion in the axial direction and a long side portion bent at a right angle from the tip of the short side portion. The terminal block formed in an L shape and on the other end side has a long side portion extending from the other end portion of the winding portion in a direction orthogonal to the axis, and a base end portion of the long side portion From the above, the engaging portion is formed in an L shape having a short side portion extending in the axial direction.
The pair of bobbins having the same shape abuts the side surfaces of the long side portions of each other, and the front end surface of the long side portion of one of the terminal blocks is a side surface of the short side portion of the other terminal block. The coil parts according to claim 1, wherein the coil parts are positioned to each other by being brought into contact with each other.   A first step portion having a larger outer dimension than the winding portion and a second step portion having a larger outer dimension than the first step portion are formed at the end of the winding portion, and A coil is formed by winding the wire between first step portions of a winding portion, and an insulating tape covering the outer periphery of the coil is wound between the second step portions. The coil component according to claim 1 or 2.   The coil component is a common mode choke coil in which the wire is wound around the pair of winding portions so that a magnetic flux in a reverse direction is formed on the mouth-shaped core. Item 4. The coil component according to any one of Items 1 to 3.   The coil component is a normal mode choke coil in which the wire is wound around the pair of winding portions so that a magnetic flux in the same direction is formed on the mouth-shaped core. Item 4. The coil component according to any one of Items 1 to 3.

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