JP2010034439A - Coil component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil component such that a coil is prevented from having scattered solder stuck or flawing. <P>SOLUTION: A cover 40 is made of an insulating material such as a resin, and includes a center portion 41 facing the lower end portion of a core portion of a bobbin in one direction, lower end portions of a pair of flange portions 21A, and the one-directional end portion of a conductor respectively, and a pair of both side portions 42 and 42 facing the lower surface of a contour extension portion of a core 10 and the lower surface 11C of a length-directional end portion of a base portion 11 of the core 10 respectively. An insulating wall is provided to a connection position between the center portion 41 and both side portions 42. When the cover 40 is fixed to the one-directional extension portions 21F and 21G of the bobbin, the insulating wall is disposed between the winding portion of the conductor and the contour extension portion of the core 10 to cover the winding portion from the contour extension portion. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a coil component, and more particularly, to a coil component including a bobbin having a substantially cylindrical winding shaft portion and a core having a coil having a conducting wire wound around the winding shaft portion.

The coil component is inserted into an inner space defined by a bobbin having a substantially cylindrical winding shaft portion, a coil having a conductive wire wound around the winding shaft portion, and an inner peripheral surface of the winding shaft portion. A configuration including a core having an insertion portion is conventionally known. Terminal blocks are provided at both ends of the winding shaft portion and closer to the mounting side mounted on the mounting substrate, and terminal pins are provided at the terminal block. One end or the other end of the conducting wire constituting the coil is electrically connected to the terminal pin. A portion of the winding shaft portion around which a part of the conducting wire constituting the coil is wound and which is closer to the non-mounting side is covered with a cover. Such a coil component is described in, for example, Japanese Utility Model Laid-Open No. 7-29812 (Patent Document 1).
Japanese Utility Model Publication No. 7-29812

  However, in the conventional coil parts, as described above, the part of the winding shaft part around which the part of the conducting wire constituting the coil is wound and the part near the non-mounting side is covered with the cover, but the mounting side Is not covered by a cover or the like. For this reason, for example, when a portion of a winding shaft portion in which a part of a conducting wire constituting a coil is wound on a substrate in which a through hole is formed and a portion closer to the mounting side is inserted, the through hole is inserted downstream in the insertion direction. On the side, the portion of the conductive wire wound around the winding shaft portion is exposed.

  When one end and the other end of the conducting wire constituting the coil are soldered to the terminal pin through the solder bath in an exposed state in this way, the portion of the conducting wire wound around the winding shaft portion is exposed from the through hole. Solder lands on the part where it is. In addition, when handling the substrate on which the coil component is mounted, the coil may be damaged by other objects coming into contact with the portion of the conductive wire wound around the winding shaft portion and exposed from the through hole. May be attached.

  Then, an object of this invention is to provide the coil components which can prevent that a solder scatters to a coil or a coil is damaged.

  To achieve the above object, the present invention provides a bobbin having a substantially cylindrical winding shaft portion, and a terminal block provided with terminal electrodes provided at both axial ends of the winding shaft portion and extending in one direction. A coil having a winding portion formed of a portion of a conductive wire wound around the winding shaft portion and a connecting portion formed of one end or the other end of the conductive wire and electrically connected to the terminal electrode, and the winding shaft And a core having an insertion portion inserted into an inner space defined by an inner peripheral surface of the portion, and the winding portion has a one-way end that forms an end in the one direction. A cover portion is inserted into a through-hole formed in the mounting substrate, and an extended end portion of the terminal electrode is electrically connected to the conductive pattern of the mounting substrate, and includes a cover that covers at least the one-way end portion. Provides a coil component fixed to the terminal block.

  The winding part has a unidirectional end that forms an end in one direction, and the unidirectional end is inserted into a through-hole formed in the mounting board, and the extended end of the terminal electrode becomes a conductive pattern of the mounting board. A cover that is electrically connected and covers at least one unidirectional end is provided, and the cover is fixed to the terminal block, so that the unidirectional end can be prevented from being exposed from the through hole formed in the substrate. . As a result, when the extended end portion of the terminal electrode is passed through the solder bath in order to electrically connect the conductive pattern of the mounting substrate, it is possible to prevent the solder from landing on the one-way end portion. In addition, when handling the mounting board on which the coil component is mounted, it is possible to prevent the coil from being damaged by another object coming into contact with the one-direction end.

  Here, a portion of the core other than the insertion portion has a conductor facing portion disposed opposite to the winding portion, and the cover is made of an insulating material and is wound from the conductor facing portion. It is preferable to have an insulating wall disposed between the conductor facing portion and the winding portion so as to shield the turning portion.

  A part of the core other than the insertion portion has a conductor facing portion arranged opposite to the winding portion, and the cover is made of an insulating material so as to shield the winding portion from the conductor facing portion. Since it has the insulation wall arrange | positioned between a part and a winding part, between a coil and a core can be reliably insulated by an insulation wall.

  Further, the coil has a lead-out portion that is drawn out from the winding portion and forms a portion of the conducting wire from the winding portion to the connecting portion, and is a part of the core and other than the insertion portion The portion has a height in the one direction that is smaller than the height of the winding portion in the one direction, the end surface in the one direction forms a lower surface, and the end surface in the one direction forms an upper surface. The terminal block has a thin width portion, and the terminal block has an upper portion of the thin width portion disposed on the upper surface of the thin width portion, and a one-way extension extending from the upper portion of the thin width portion in the one direction along the core. It is preferable that a drawer portion accommodating space for accommodating the drawer portion is formed in the upper portion of the thin width portion.

  A part of the core other than the insertion part has a height smaller than the height in one direction of the winding part in one direction, and the end face in one direction forms a lower surface and is in the opposite direction The terminal block has a thin width portion whose upper surface is the upper surface, and the terminal block is disposed on the upper surface of the thin width portion and extends in one direction along the core from the thin width portion upper portion. Since the lead portion accommodating space for accommodating the lead portion is formed in the upper portion of the thin width portion, the height of the thin portion in one direction includes the diameter of the lead wire in the lead portion. Compared with the case where the lead-out portion is arranged at a position facing the lower surface of the thin width portion, the height of the coil component can be reduced based on the upper surface of the mounting board on which the coil component is mounted. Can do.

  The core has a substantially rectangular plate-like base portion and a substantially rectangular shape extending from both ends of the base portion in parallel to the upper surface of the base portion and extending in parallel to each other perpendicular to the longitudinal direction of the base portion. A pair of E-shaped cores each having a pair of contour extending portions and a central extending portion which is substantially rectangular and extends in parallel with the contour extending portion from the center of the base, The extending end surfaces of the contour extending portion of the E-shaped core are connected to each other, and the central extending portions of the pair of E-shaped cores are respectively one end and the other end in the axial direction of the winding shaft portion The extension end faces are connected to each other by being inserted into the inner space, the central extension portion forms the insertion portion, the base portion forms the thin width portion, and the contour extension portion forms the conductive wire facing portion. None, the one-way extension preferably extends in the one direction along the longitudinal end face of the base. .

  The core has a substantially rectangular plate-like base portion and a pair of contours extending substantially parallel to the top surface of the base portion from both ends of the base portion and extending parallel to each other perpendicular to the longitudinal direction of the base portion. Consists of a pair of E-shaped cores each having a protruding portion and a central extending portion that is substantially rectangular and extends in parallel with the contour extending portion from the center of the base, and the contour extension of the pair of E-shaped cores The extended end faces of the two parts are connected to each other, and the central extension parts of the pair of E-shaped cores are inserted into the inner space from one end and the other end in the axial direction of the winding shaft part, respectively. Connected, the central extension portion is an insertion portion, the base portion is a thin width portion, the contour extension portion is a conductor-facing portion, and the one-way extension portion is one along the longitudinal end surface of the base portion. The terminal block extends in the direction opposite to the direction in which the contour extension extends from the base. It can be shaped not to protrude from the part.

  The cover has a fixing portion disposed between the one-way extending portion and a longitudinal end surface of the base portion of the core, and the fixing portion engages with the one-way extending portion. Is preferably fixed to the terminal block. Since the cover has a fixing portion disposed between the one-way extending portion and the longitudinal end surface of the base portion of the core, the fixing portion can be engaged with the one-way extending portion.

  As described above, the present invention can provide a coil component that can prevent solder from being attached to the coil or from being damaged.

  A coil component according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the coil component 1 includes a core 10, a bobbin 20, a conducting wire 30, and a cover 40.

  As shown in FIG. 5, the bobbin 20 has a core portion 21 having a substantially cylindrical shape. The winding core portion 21 corresponds to a winding shaft portion. Flange portions 21A are provided at both ends in the axial direction of the winding core portion 21 and are portions of the flange portion 21A and above the upper surface 10A (FIG. 3 and the like) of the core 10 to be described later in FIG. A pair of terminal blocks 21B and 21C extend from the positioned portions. The pair of terminal blocks 21B and 21C are curved after extending from the flange portion 21A in the axial direction of the core portion 21, and in a direction perpendicular to the axial direction and away from each other, that is, an upper surface of the core 10 described later. The direction is parallel to 10A and extends in the left-right direction in the figure. The portions of the terminal blocks 21B and 21C extending so far form thin-width portion upper portions 21D and 21E. Further, as shown in FIG. 5B from the thin-width portion upper portions 21D and 21E, 1, that is, unidirectionally extending portions 21 </ b> F and 21 </ b> G extending along a longitudinal end surface 11 </ b> B (FIG. 3, etc.) of the base portion 11 of the core 10 to be described later. The following description will be made assuming that the extending direction of the one-way extending portions 21F and 21G, that is, the direction from the upper side to the lower side in FIG.

  The thin-width portion upper portions 21D and 21E are disposed on the upper surface of the base portion 11 of the core 10 to be described later as shown in FIG. 3, and in the direction from the upper side to the lower side in FIG. It arrange | positions between the upper surface 11A of the base 11 of the core 10, and the upper end 21J of the flange part 21A. As shown in FIG. 2, grooves 21a and 21b having a width and depth larger than the diameter of the conductive wire 30 are formed on the upper end surfaces of the thin width portion upper portions 21D and 21E shown in FIG. It is formed up to the direction extending portions 21F and 21G. In the grooves 21a and 21b, a lead-out portion 32 of a conducting wire 30 described later is accommodated. The grooves 21a and 21b correspond to the drawer portion accommodating space.

  Pin terminals 22 as terminal electrodes are provided in the one-way extending portions 21F and 21G. As shown in FIG. 5 (b), the pin terminal 22 has an L-shape that is such that a straight pin is bent at a right angle in the middle. A portion extending downward from FIG. 5B from the portion bent at a right angle is an extended end portion 22A electrically connected to a conductive pattern (not shown) of the mounting substrate 2 (FIG. 3) by soldering. 5B, the portion extending rightward or leftward in FIG. 5B is electrically connected to one end or the other end of a conducting wire 30 described later by soldering. Conductive wire connecting portion 22B connected to the. The portion bent at a right angle and the vicinity thereof are fixedly arranged in the one-way extending portions 21F and 21G of the bobbin 20. Further, an engaging recess 21c is formed at a part of the one-way extending portions 21F and 21G and facing a longitudinal end surface of a base portion 11 of the core 10 described later.

  As shown in FIGS. 3 and 5B, core positioning pieces 23 are provided in the flange portion 21A corresponding to the axial end surface of the winding core portion 21, respectively. The core positioning pieces 23 are provided on the upper side and the lower side shown in FIG. 5B of the opening of the inner space 20a at the axial end of the core part 21, and the upper surface 10A of the core 10 described later and It extends parallel to the lower surface 10B (FIG. 3). As will be described later, when the central extension portion 13 of the core 10 is inserted into the inner space 20a defined by the inner peripheral surface of the core portion 21, the core positioning is performed on the upper surface 11A and the lower surface 11C of the base portion 11 of the core 10. When the pieces 23 are in contact with each other, positioning in the vertical direction in FIG. 5B is performed.

  A core insulating wall 21H that insulates a primary side coil and a secondary side coil of a later-described conductive wire 30 wound around the core part 21 is provided at the axial center position of the core part 21. Yes. At the left and right ends shown in FIG. 5 of the core insulating wall 21H, wall convex portions 21I extending in the vertical direction in FIG. 5B are provided.

  Each of the pair of cores 10 has a substantially E shape as shown in FIG. 7 and is made of a magnetic material (for example, ferrite). More specifically, the core 10 includes a base portion 11, a contour extending portion 12, and a central extending portion 13. The base 11 has a substantially rectangular plate shape. The contour extending portions 12 have a substantially rectangular shape, and are provided as a pair extending from both ends of the base portion 11 in parallel to the upper surface 11A of the base portion 11 and perpendicular to the longitudinal direction of the base portion 11 in the same direction. ing. The central extension 13 has a substantially rectangular shape, extends in the same direction as the contour extension 12 from the center of the base 11 and extends in the same direction as the contour extension 12 in the same direction. Is provided. The upper surface 11A of the base 11, the upper surface 12B of the contour extending portion 12, and the upper surface 13B of the central extending portion 13 are flush with each other, and they constitute the upper surface 10A of the core. Similarly, the lower surface 11C of the base portion 11, the lower surface of the contour extending portion 12, and the lower surface of the central extending portion 13 are in the same positional relationship, and they constitute the lower surface 10B of the core.

  The center extending portions 13 of the pair of cores 10 are inserted into the inner space 20a of the core portion 21 from one end and the other end in the axial direction of the core portion 21, respectively, and the contour extending portions 12 of the pair of cores 10. The extended end surfaces 12A are connected to each other by an adhesive, and the extended end surfaces 13A of the central extending portion 13 are connected to each other by an adhesive. In this state, the contour extending portion 12 is disposed opposite to a winding portion 31 of the conductive wire 30 described later as shown in FIG. The thicknesses of the base part 11, the contour extension part 12, and the center extension part 13 of the core 10 each having a plate shape, that is, the height in one direction from the front to the back of the paper surface of FIG. It has a value smaller than the height of the winding part 31 of the conducting wire 30 described later in the same direction. The central extension portion 13 corresponds to an insertion portion, the base portion 11 corresponds to a thin width portion, and the contour extension portion 12 corresponds to a conductor facing portion.

  The conducting wire 30 is wound around the winding core 21 to form a coil. As the conducting wire 30, for example, a copper wire having a surrounding insulation coating is used. As shown in FIG. 1 and FIG. 2, the conducting wire 30 is wound as a primary coil between one flange portion 21A and the core insulating wall 21H, and the other flange portion 21A and core insulating material. Another secondary coil is wound between the wall 21H and the wall 21H. The portion of the conducting wire 30 wound around the winding core portion 21 forms a winding portion 31, the portion of the conducting wire 30 drawn from the winding portion 31 forms a drawing portion 32, one end of the two conducting wires 30, etc. The end forms a connecting portion 33 soldered to the conducting wire connecting portion 22 </ b> B (FIG. 5B) of the pin terminal 22. Further, the end in one direction of the winding part 31, that is, the lower end located in the direction of the back side of the sheet of FIG. 2 with respect to the upper end 31A of the winding part 31 shown in FIG. The end portion in one direction corresponds to a cover 40 and a bobbin 20 described later in a through-hole 2a formed in the mounting substrate 2 when mounted on the mounting substrate 2 as shown in FIG. It is comprised so that it may be inserted and arrange | positioned with the lower part shown by FIG. The upper end portion 31A of the winding portion 31 is substantially flush with the upper end 21J of the flange portion 21A of the bobbin 20 and the upper ends of the terminal blocks 21B and 21C shown in FIG.

  The cover 40 is made of an insulating material such as a resin, and has a substantially H shape as shown in FIG. The cover 40 faces the lower end portion of the core portion 21 and the lower end portion of the pair of flange portions 21A of the bobbin 20 and the one end portion of the conducting wire 30 in the direction from the upper side to the lower side in FIG. And a pair of opposite side portions 42 and 42 respectively opposed to the lower surface of the contour extending portion 12 of the core 10 and the lower surface of the longitudinal end portion of the base portion 11 of the core 10. In one direction, the lower end portions of the pair of flange portions 21A of the bobbin 20 are in one direction lower in FIG. 3 than the lower surface 11C of the base portion 11 of the core 10 and the lower surface of the contour extending portion 12 as shown in FIG. Therefore, as shown in FIG. 6B, the central portion 41 also protrudes from the both side portions 42 in one direction.

  An insulating wall 43 having a substantially rectangular plate shape extending in a direction opposite to one direction, that is, upward in FIG. 6B, is provided at a connection position between the central portion 41 and the both side portions. Yes. A guide 43A is provided at the center in the vertical direction in FIG. 6A, which is the longitudinal direction of the insulating wall 43, and the wall convex portion 21I of the core insulating wall 21H is guided by the guide 43A, as will be described later. When the cover 40 is fixed to the one-way extending portions 21 </ b> F and 21 </ b> G of the bobbin 20, the insulating wall 43 extends between the winding portion 31 of the conducting wire 30 and the contour extending portion 12 of the core 10. The winding part 31 is configured to be shielded from the part 12.

  Bobbin locking walls 44 having a substantially rectangular plate shape extending in the direction opposite to one direction, that is, upward in FIG. The bobbin locking wall 44 is provided with an engaging convex portion 44A that can be engaged with the engaging concave portion 21c of the one-way extending portions 21F and 21G from one end to the other end in the longitudinal direction of the bobbin locking wall 44. It has been. The bobbin locking wall 44 is inserted and disposed between the one-direction extending portions 21F and 21G and the longitudinal end surface 11B of the base 11 of the core 10, and the engaging convex portion 44A is engaged with the engaging concave portion 21c. Thus, the cover 40 can be fixed to the one-way extending portions 21F and 21G of the bobbin 20, and the lower end portions of the pair of flange portions 21A of the bobbin 20 in one direction and the one-way end portions of the conducting wire 30 are connected. The cover 40 can be covered with the central portion 41, and the lower surface of the contour extending portion 12 of the core 10 and the lower surface of the longitudinal end portion of the base portion 11 of the core 10 can be covered with both side portions 42. ing. The bobbin locking wall 44 corresponds to a fixed portion.

  Since the cover 40 is provided to cover the unidirectional end, and the cover 40 is fixed to the terminal blocks 21B and 21C, the unidirectional end of the winding portion 31 of the conducting wire 30 extends from the through hole 2a formed in the mounting substrate 2. It is possible to prevent exposure. As a result, when the extended end portion 22A of the pin terminal 22 is passed through a solder bath in order to electrically connect to a conductive pattern (not shown) of the mounting substrate 2, solder is applied to one end portion of the winding portion 31. It is possible to prevent landing. Further, when the mounting substrate 2 on which the coil component 1 is mounted is handled, the conductive wire 30 constituting the coil may be damaged due to other objects coming into contact with one end portion of the winding portion 31. Can be prevented.

  Further, the cover 40 is made of an insulating material and has an insulating wall 43 disposed between the contour extension portion 12 and the winding portion 31 so as to shield the winding portion 31 from the contour extension portion 12. The wall 43 can reliably insulate between the lead wire 30 constituting the coil and the core 10.

  The base portion 11 of the core 10 has a height that is smaller than the height in one direction of the winding portion 31 in one direction, and the terminal blocks 21B and 21C are thinly arranged on the upper surface of the base portion 11. It has width part upper part 21D, 21E and one direction extension part 21F, 21G extended in one direction along the core 10 from thin part upper part 21D, 21E, and it is drawn out to thin part upper part 21D, 21E Since the drawer part accommodating space for accommodating the part 32 is formed, the diameter of the conductor 30 in the drawer part 32 can be included in the height of the thin width part upper parts 21D and 21E in one direction, and the lower surface of the base part 11 Compared with the case where the lead portion 32 of the conducting wire 30 is arranged at a position opposite to 11C, the height of the coil component 1 is reduced based on the upper surface 2A (FIG. 3) of the mounting substrate 2 on which the coil component 1 and the like are mounted. Can be achieved.

  The core 10 has a substantially rectangular plate-like base 11 and a substantially rectangular shape extending from both ends of the base 11 in parallel to the upper surface 11A of the base 11 and perpendicular to the longitudinal direction of the base 11 in parallel to each other. A pair of E-shaped cores each having a pair of contour extending portions 12 extending in parallel and a central extending portion 13 having a substantially rectangular shape and extending in parallel with the contour extending portion 12 from the center of the base portion 11. The extending end faces 12A of the contour extending portions 12 of the pair of E-shaped cores are connected to each other, and the central extending portions 13 of the pair of E-shaped cores are respectively axially of the winding shaft portions. The extension end faces 13A are connected to each other by being inserted into the inner space 20a from one end and the other end, and the one-direction extension portions 21F and 21G extend in one direction along the longitudinal end face 11B of the base portion 11. Therefore, the contour extension 12 from the base 11 Terminal block 21B to a direction extending in the opposite direction, 21C can be shaped not to protrude from the base portion 11.

  Moreover, since the cover 40 has a fixing portion disposed between the one-way extending portions 21F and 21G and the end face 11B in the longitudinal direction of the base portion 11 of the core 10, the fixing portion is changed to the one-way extending portions 21F and 21G. Can be engaged.

  The coil component according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, the bobbin, the conductive wire, the core 10, and the cover are not limited to the shape of the present embodiment.

  The present invention is useful in the field of coil components in which a part of a coil component is inserted into a through hole formed in the mounting substrate and mounted on the mounting substrate.

The perspective view which shows the coil components by embodiment of this invention. The top view which shows the coil components by embodiment of this invention. The front view which shows the coil components by embodiment of this invention. The bottom view which shows the coil components by embodiment of this invention. It is a figure which shows the bobbin of the coil components by embodiment of this invention, (a) is a top view, (b) is a front view. It is a figure which shows the cover of the coil components by embodiment of this invention, (a) is a top view, (b) is a front view. The top view which shows the core of the coil components by embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coil component 10 Core 11 Base 12 Contour extension part 12A Extension end surface 13 Center extension part 20 Bobbin 21 Core part 21B Terminal block 21D, 21E Thin width part upper part 21F, 21G Unidirectional extension part 21a Groove 22 Pin terminal 22A Extension end portion 30 Conductor 31 Winding portion 32 Drawer portion 33 Connection portion 40 Cover 43 Insulating wall 44 Bobbin locking wall

Claims (5)

A bobbin having a substantially cylindrical winding shaft portion and a terminal block provided with terminal electrodes provided at both ends in the axial direction of the winding shaft portion and extending in one direction;
A coil having a winding portion formed of a portion of a conductive wire wound around the winding shaft portion and a connecting portion formed of one end or the other end of the conductive wire and electrically connected to the terminal electrode;
A core having an insertion portion that is inserted into an inner space defined by the inner peripheral surface of the winding shaft portion,
The winding portion has a unidirectional end portion that forms an end portion in the one direction, the unidirectional end portion is inserted into a through hole formed in the mounting substrate, and an extended end portion of the terminal electrode is the mounting portion Electrically connected to the conductive pattern of the substrate,
A coil component comprising: a cover that covers at least the one-direction end portion; and the cover is fixed to the terminal block. A portion of the core other than the insertion portion has a conductor facing portion disposed to face the winding portion,
2. The cover according to claim 1, further comprising an insulating wall made of an insulating material and disposed between the conductor facing portion and the winding portion so as to shield the winding portion from the conductor facing portion. The coil component described. The coil has a lead portion that is drawn from the winding portion and forms a portion of the conducting wire from the winding portion to the connecting portion,
A portion of the core other than the insertion portion has a height in the one direction that is smaller than the height of the winding portion in the one direction, and an end surface in the one direction is a lower surface. The end face in the one direction has a thin width portion that forms the upper surface,
The terminal block has a thin-width portion upper portion disposed on the upper surface of the thin-width portion, and a unidirectional extension portion extending in the one direction along the core from the thin-width portion upper portion,
The coil component according to claim 1 or 2, wherein a drawer portion accommodating space for accommodating the drawer portion is formed in the upper portion of the thin width portion. The core has a substantially rectangular plate-like base portion and a substantially rectangular shape extending from both ends of the base portion in parallel to the upper surface of the base portion and extending in parallel to each other perpendicular to the longitudinal direction of the base portion. A pair of E-shaped cores each having a pair of contour extending portions and a central extending portion that is substantially rectangular and extends in parallel with the contour extending portion from the center of the base portion. The extending end faces of the contour extending part of the letter-shaped core are connected to each other, and the central extending parts of the pair of E-shaped cores are respectively connected from the one end and the other end in the axial direction of the winding shaft part. Inserted into the inner space, the extended end faces are connected to each other, the central extension portion forms the insertion portion, the base portion forms the thin width portion, the contour extension portion forms the conductor facing portion,
The coil component according to claim 3, wherein the one-way extending portion extends in the one direction along an end face in a longitudinal direction of the base portion.   The cover has a fixing portion disposed between the one-way extension portion and a longitudinal end surface of the base portion of the core, and the fixing portion engages with the one-way extension portion to thereby The coil component according to claim 4, wherein the coil component is fixed to a terminal block.

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