JP2012089804A - Coil component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil component capable of securing a large contact area of a flange part of a drum core and a flange part of a planar core at a part where the flange part of the drum core and the flange part of the planar core face each other.SOLUTION: At a part between a first side face 12C and a mounting surface 12B of a flange part 12 in a roughly rectangular parallelepiped shape and a part between a second side face 12D and the mounting surface 12B, a recess 12a is formed respectively. The recess 12a is composed of a notched part. One each of one end part and the other end part of conductors 31, 32 is arranged near the total of four recesses 12a, and electrically connected with metal terminals 41, 42 at positions facing the recess 12a in an X-axis direction near the recess 12a to form connection parts 31A, 32A. At the connection parts 31A, 32A, one end and the other end of the conductors 31, 32 are laser-welded to the metal terminals 41, 42 to configure weld balls.

Description

  The present invention relates to a coil component, and more particularly to a coil component having a drum core and a plate-like core.

  2. Description of the Related Art Conventionally, a coil component configured by winding a conductive wire around a drum core is known. The drum core has a core part and flanges provided at both ends thereof. A conductive wire, which is a copper wire with insulation coating, is wound around the core. An electrode is provided in the collar portion, and one end portion and the other end portion of the conducting wire are electrically connected and connected to the electrode. In addition, there is provided a plate-like core disposed so as to face a portion of the flange portion at both ends of the core portion, where one end portion and the other end portion of the conducting wire are electrically connected and connected. Yes. Such a coil component is described in, for example, Japanese Patent Application Laid-Open No. 2006-4979 (Patent Document 1).

Japanese Patent Laid-Open No. 2006-4979

  The larger the contact area between the flange portion and the plate core at the portion where the flange portion of the drum core and the plate core are opposed, the greater the inductance characteristics and impedance characteristics of the coil component. However, in the above-described conventional coil component, an electrode is disposed on a part of the flange portion and facing the plate-like core, and one end portion and the other end portion of the conducting wire are electrically connected to the electrode. Since it was connected, there was a limit in increasing the contact area between the collar and the plate-like core.

  Then, an object of this invention is to provide the coil components which can ensure large the contact area of the collar part and plate-shaped core in the part which the collar part and plate-shaped core of a drum core oppose.

  In order to achieve the above object, the present invention provides a pair of flange portions each having a mounting surface that can be opposed to a mounting substrate and a plate-shaped core facing surface that is disposed opposite to the mounting surface, and the pair of flange portions. A drum core having a winding core portion connected to each other, a plate-like core having a substantially plate shape and having both ends in the longitudinal direction fixed to the plate-like core facing surfaces of the pair of flanges, and a terminal fitting. A metal terminal disposed on the flange, and a conductive wire wound around the core and having one end and the other end electrically connected to the metal terminal to form a connecting portion, The mounting surface is formed with a recess recessed in the direction of the plate-shaped core facing surface, and the metal terminal is mounted on the mounting surface of the flange, and the mounting portion is inserted into the recess. And a conductor holding portion that is disposed in the recess and holds the conductor, and all the connecting portions are in or near the recess. It provides a coil component that is location.

  A recess recessed in the direction of the plate-shaped core facing surface is formed on the mounting surface of the flange portion, and the metal terminal is mounted on the mounting surface of the flange portion, and extends from the mounting portion into the recess and extends into the recess. A conductor holding part for holding the conductor, and all the connecting parts are arranged in the recess or in the vicinity of the recess, so that the connecting part of the conductor is not arranged on the plate core facing surface. Therefore, it is possible to avoid a reduction in the area of a part of the plate-core facing surface that is fixed to and contacts the plate-like core due to the presence of the connecting portion.

  Here, it is preferable that the conducting wire holding part is constituted by a bent piece that is formed integrally with the mounting part and is formed of a part of a terminal fitting that is bent in the recess.

  Since the conducting wire holding part is constituted by a bent piece that is formed integrally with the mounting part and is formed by a part of the terminal fitting bent in the recess, the conducting wire can be held with a simple structure that is formed by the bent piece.

  Further, it is preferable that the bent piece is bent on the surface of the collar portion that defines the concave portion and connected to the mounting surface.

  Since the bent piece is bent on the surface of the flange portion that defines the concave portion and is connected to the mounting surface, the bent piece can be disposed in the concave portion, and the concave portion defines the concave portion. It can be arranged on the surface of the part and connected to the mounting surface. For this reason, the bent piece can be arranged without worrying about the crossing of dimensions, and a gap is not formed between the bent piece and the flange portion, and thus the conductor can be stably held.

  Moreover, it is preferable that this metal terminal has an end surface part arrange | positioned at the end surface of this collar part in the axial direction of this core part.

  Since the metal terminal has an end surface portion disposed on the end surface of the flange portion in the axial direction of the winding core portion, a solder fillet can be formed on the end surface portion when the coil component is mounted on the mounting substrate.

  In addition, the metal terminal has a locked portion that is connected to the end surface portion and locked to the plate core facing surface of the flange portion, and the area of the locked portion is larger than the area of the mounting portion. Is preferably small.

  The metal terminal has a locked portion that is connected to the end surface portion and locked to the plate-shaped core facing surface of the flange portion, and since the area of the locked portion is smaller than the area of the mounting portion, the locked portion It is possible to avoid as much as possible that the area of a portion of the plate-shaped core facing surface that is fixed to and contacts the plate-shaped core is reduced due to the presence of.

  Further, it is preferable that an opposing surface recess recessed in the direction of the mounting surface is formed on the surface of the flange facing the plate-like core, and the locked portion is accommodated in the opposing surface recess.

  Since the opposing surface concave portion that is depressed in the direction of the mounting surface is formed on the plate core facing surface of the flange portion, and the locked portion is accommodated in the concave portion of the opposing surface, the locking portion is provided in the direction of the plate core. Protruding from the plate-like core facing surface can be prevented. For this reason, it is a part of plate-shaped core opposing surface, and it can contact a plate-shaped core in the whole part other than a counter surface recessed part.

  The end surface portion includes an end surface portion base portion extending in one direction on the end surface of the flange portion, and an end surface portion extension portion extending from the end surface portion base portion in a direction intersecting the end surface portion base portion. It is preferable to have.

  The end surface portion has an end surface portion base portion extending in one direction on the end surface of the flange portion, and an end surface portion extension portion extending from the end surface portion base portion in a direction intersecting the end surface portion base portion. The area can be further increased, and the adhesion area with the end face of the collar portion can be further increased. For this reason, a metal terminal can be more firmly fixed to a collar part.

  Moreover, it is preferable that the part which was a part of this metal terminal, and was connected by this connection part being electrically connected consists of the part of this metal terminal extended from this edge part extension part.

  A part of the metal terminal that is connected with the connecting portion electrically connected to it is composed of a portion of the metal terminal that extends from the end surface extension portion, so that the metal terminal is complicated and complicated Can be avoided. For this reason, it can be set as the structure by which the metal terminal was stably arrange | positioned with respect to a mounting part, and when connecting one end part and other end part of a conducting wire to a metal terminal by laser welding and connecting The welded portion can be formed stably.

  Moreover, it is preferable that the part which was a part of this metal terminal, and was connected by this connection part being electrically connected consists of the part of the metal terminal extended from this mounting part.

  A part of the metal terminal that is connected to the connecting portion electrically connected to the connecting portion is composed of a portion of the metal terminal extending from the mounting portion. Can be disposed in the recess, and the welding ball formed by melting the electrically connected portion and the connecting portion and the connecting portion are melted.

  Further, a part of the end surface of the flange portion other than the portion where the end surface portion of the metal terminal is disposed is in a direction away from the core portion in the axial direction of the core portion. It is preferable that it protrudes.

  The entire portion of the end surface of the collar portion other than the portion where the end surface portion of the metal terminal is disposed protrudes in a direction away from the core portion in the axial direction of the core portion. Accordingly, the area of the plate-shaped core facing surface increases, and the contact area of the plate-shaped core facing surface with the plate-shaped core can be increased. In addition, the volume of the core can be increased. Further, the protruding portion can be a portion for positioning the metal terminal.

  Further, the flange portion has a rectangular cross section cut by a plane perpendicular to the axial direction of the winding core portion, and one side of the rectangle constitutes the mounting surface, and the concave portion corresponds to one side of the rectangle. It is preferable to have a shape in which corners at both ends are notched.

  The collar part has a rectangular cross-section cut by a plane perpendicular to the axial direction of the core part, one side of the rectangle forms the mounting surface, and the concave part has a shape in which the corners of one side of the rectangle are cut off at both ends. Therefore, the conducting wire can be drawn out from the core portion to the metal terminal through the notched portion, and the operation of drawing out the conducting wire from the core portion to the metal terminal can be facilitated.

  As described above, the present invention provides a coil component capable of ensuring a large contact area between the drum core collar and the plate core collar in a portion where the drum core collar and the plate core collar face each other. be able to.

The perspective view which shows the coil components by the 1st Embodiment of this invention. The perspective view which shows the drum core of the coil components by the 1st Embodiment of this invention. The perspective view which shows the metal terminal of the coil components by the 1st Embodiment of this invention. It is a figure which shows a mode that a conducting wire is welded to the metal terminal of the coil components by the 1st Embodiment of this invention, (a) is a side view, (b) is a bottom view. The front view which shows a mode that the solder fillet was pulled by the metal terminal of the coil components by the 1st Embodiment of this invention. The perspective view which shows the coil components by the 2nd Embodiment of this invention. It is a figure which shows the drum core of the coil components by the 2nd Embodiment of this invention, (a) is a top view, (b) is a side view, (c) is a front view. It is a figure which shows the metal terminal of the coil components by the 2nd Embodiment of this invention, (a) is a front view, (b) is a side view, (c) is a bottom view. The perspective view which shows the modification of the coil components by the 1st Embodiment of this invention. It is a figure which shows the modification of the metal terminal of the coil components by the 1st Embodiment of this invention, (a) is a front view, (b) is a right view, (c) is a left view, (d). Is a plan view (e) is a bottom view. The perspective view which shows the modification of the metal terminal of the coil components by the 1st Embodiment of this invention.

  A coil component according to a first embodiment of the present invention will be described with reference to FIGS. The coil component 1 according to the first embodiment is an in-vehicle common mode filter that is specifically downsized. As shown in FIG. 1, the coil component 1 includes a drum core 10 and a plate-like core 20 disposed so as to cover the drum core 10.

  As shown in FIG. 2, the drum core 10 includes a winding core portion 11 having a substantially rectangular cross section perpendicular to the longitudinal direction, and a pair of flange portions 12 and 12 having the same shape provided at both longitudinal ends of the winding core portion 11. Have. Two conducting wires 31 and 32 are wound around the core part 11. Since the flanges 12 and 12 located at both ends of the drum core 10 have the same shape, only one flange 12 will be described below unless otherwise specified. In addition, a longitudinal direction that is a direction in which the axis of the core part 11 is oriented is defined as an X-axis direction, and a substantially rectangular longitudinal direction that is a cross-sectional shape orthogonal to the longitudinal direction of the core part 11 is defined as a Y-axis direction. The direction orthogonal to the X-axis direction and the Y-axis direction will be described as the Z-axis direction. Further, a direction from approximately lower left to approximately upper right in FIG. 1 is defined as an X axis + direction, and the opposite direction is defined as an X axis−direction. In addition, a direction from approximately lower right to approximately upper left in FIG. 1 is defined as a Y-axis + direction, and the opposite direction is defined as a Y-axis-direction. Also, the direction from the bottom to the top of FIG. 1 is defined as the Z-axis + direction, and the opposite direction is defined as the Z-axis-direction. The dimension of the drum core 10 in the X-axis direction is about 3.2 mm, the dimension of the drum core 10 in the Y-axis direction is about 2.5 mm, and the dimension of the drum core 10 in the Z-axis direction is about 1.5 mm. .

  The flange portions 12 are provided integrally with the core portion 11 at both ends of the core portion 11 in the X-axis direction. The flange portion 12 has a substantially rectangular parallelepiped shape, and has six surfaces: a plate-like core facing surface 12A, a mounting surface 12B, a first side surface 12C, a second side surface 12D, an outer end surface 12E, and an inner end surface 12F. Yes. The plate-like core facing surface 12A and the mounting surface 12B have a parallel positional relationship and a positional relationship parallel to the XY plane. The first side surface 12C and the second side surface 12D have a parallel positional relationship and a positional relationship parallel to the XZ plane. Further, the outer end surface 12E and the inner end surface 12F have a parallel positional relationship and a positional relationship parallel to the YZ plane.

  Concave portions 12a are formed at both ends in the Y-axis direction of the mounting surface 12B. More specifically, the recess 12a is formed of a notch, and is a connecting portion between the first side surface 12C and the mounting surface 12B that defines the outer surface of the substantially rectangular parallelepiped, from the outer end surface 12E to the inner end surface 12F, and the second side surface. The connection portions between 12D and the mounting surface 12B are cut out. That is, a shape in which the corners of both sides of one side of the rectangle corresponding to the mounting surface 12B of the flange portion 12 having a substantially rectangular cross section cut by a surface orthogonal to the axial direction of the core portion 11 are cut out. I am doing. A part of the flange 12 that defines the recess 12a is constituted by a vertical wall 12G and a horizontal wall 12H, and the vertical wall 12G is in a positional relationship parallel to the first side surface 12C and the second side surface 12D. The horizontal wall 12H has a positional relationship parallel to the plate-like core facing surface 12A and the mounting surface 12B.

  Further, a T-shaped protruding portion 12I is provided on the outer end surface 12E of the flange portion 12. As shown in FIG. 2, the T-shaped protruding portion 12I protrudes in a direction away from the core portion 11 in the X-axis direction, and the protruding amount in the same direction is in all the portions that are T-shaped. Are the same. The amount of protrusion is an amount that is flush with the surface of the end surface portions 41B and 42B of the metal terminals 41 and 42 described later and opposite to the surface bonded to the flange portion 12 as described later, or It is an amount that protrudes away from the core part 11 in the X-axis direction from the opposite surface.

  The conducting wires 31 and 32 are each made of a copper wire with insulation coating, and the core portion 11 is a so-called two-layer winding in which the conducting wire 32 is wound on the conducting wire 31 wound around the winding core portion 11. It is wound around. The conducting wires 31 and 32 are part of the core portion 11 and are drawn out from the vicinity of the connecting portion connected to the flange portion 12, and extend toward the concave portion 12a. One end and the other end of each of the conducting wires 31 and 32 are disposed in the vicinity of a total of four recesses 12a, respectively, and a metal terminal 41 to be described later at a position near the recess 12a and facing the recess 12a in the X-axis direction. , 42 are electrically connected to each other to form the connecting portions 31A, 32A. The connecting portions 31A and 32A constitute welding balls together with a part of the metal terminals 41 and 42 by laser welding one end and the other end of the conducting wires 31 and 32 to the metal terminals 41 and 42 described later.

  The flange portion 12 is provided with metal terminals 41 and 42, respectively. The metal terminals 41 and 42 are disposed across the outer end surface 12E and the mounting surface 12B of the flange portion 12. The metal terminal 41 and the metal terminal 42 are each composed of a terminal metal fitting formed by punching and bending a single plate-like metal plate made of phosphor bronze. Therefore, when the metal terminal 41 and the metal terminal 42 are returned to the state before being bent, they become a single plate-like metal plate. One surface of the metal terminal 41 and the metal terminal 42 is joined to a mounting substrate (not shown), and the one surface is plated with nickel and tin. Moreover, the other surface with respect to one surface is adhere | attached on the collar part 12, and phosphor bronze is exposed as it is in the other surface. Since the metal terminal 41 and the metal terminal 42 are mirror-symmetrical, only the metal terminal 41 will be described below unless otherwise specified, and the description of the metal terminal 42 is omitted.

  As shown in FIG. 3, the metal terminals 41, 42 have mounting portions 41 </ b> A, 42 </ b> A and end surface portions 41 </ b> B, 42 </ b> B each having a plate shape. The mounting portions 41A and 42B have a substantially rectangular shape, are part of the mounting surface 12B of the flange portion 12 and are arranged at the end portion in the Y axis + direction and the end portion in the Y axis − direction, and are attached to the flange portion 12 by an adhesive. It is fixed.

  The mounting portion 41A is provided with a conducting wire holding portion 41C integrally with the mounting portion 41A. The conducting wire holding portion 41 </ b> C is configured by a bent piece made of a part of a terminal metal fitting constituting the metal terminal 41. More specifically, the bent piece extends from the mounting portion 41A into the recess 12a and extends on the vertical wall 12G in the Z-axis + direction, and from the extended end to the substantially Z-axis. It is comprised by the part 41C-2 turned back to-direction, and is accommodated in the recessed part 12a. The portion extending in the Z-axis + direction and the portion folded in the Z-axis-direction sandwich and hold near the one end and the other end of the conducting wire 32.

  The end surface portion 41B is provided integrally with a portion of one side of the mounting portion 41A having a substantially rectangular shape, and has a positional relationship orthogonal to the mounting portion 41A. The end surface portion 41B has a substantially rectangular end surface portion base portion 41D whose longitudinal direction is oriented in the Z-axis direction, and a substantially rectangular end surface portion extending portion 41E extending from the end surface portion base portion 41D in the Y-axis direction. is doing. The end surface base portion 41D and the end surface portion extending portion 41E have a substantially L-shaped shape, and as shown in FIG. 1, the end surface portion 41B surrounds the periphery of the recess 12a on the outer end surface 12E. 12E is adhered and arranged.

  An electrode connecting portion 41F is provided at a part of the end surface portion extending portion 41E directed in the Y-axis direction and at the end portion in the Z-axis-direction. The electrode connecting portion 41F is provided so as to extend from the portion in a direction away from the core portion 11, and the tip is bifurcated before welding the one end and the other end of the conducting wires 31, 32. It is branched and has a substantially Y shape. As shown in FIG. 4, the conducting wire 32 is disposed between the portion 41C-1 and the portion 41C-2 of the conducting wire holding portion 41C, and the portion 41C-2 of the conducting wire holding portion 41C is bent so as to sandwich the conducting wire 32. Thus, the conducting wire 32 is sandwiched between the portion 41C-1 and the portion 41C-2. And in the electrode connection part 41F, as shown with the arrow of FIG. 4 (a) with respect to the location enclosed with (circle) of the dashed-two dotted line of FIG.4 (b), it is to the conducting wire 32 and the electrode connection part 41F. By simultaneously performing laser irradiation and laser welding, one end or the other end of each of the conducting wires 31 and 32 is electrically connected and connected to the electrode connecting portion 41F one by one.

  The plate-like core 20 has a substantially rectangular plate shape having a thickness in the Z-axis direction. Accordingly, the plate-like core 20 has an end face 20A on the drum core 10 side, and the end face 20A has a positional relationship parallel to the XY plane. In a state where the plate core 20 is placed on the drum core 10, the end surface 20 </ b> A and the entire surface of the plate core facing surface 12 </ b> A are in contact with each other via an adhesive and are fixed to each other.

  When the coil parts 1 are mounted on the mounting substrate 2 (FIG. 5) by soldering the metal terminals 41 and 42 of the coil component 1 to the conductive pattern of the mounting substrate (not shown) as shown in FIG. As shown, the solder fillet 2A is drawn not only to the end face portion 42B of the metal terminal 42 but also to the periphery of the conducting wire holding portion 42C and the conducting wire holding portion 42C. The same applies to the metal terminal 41.

  The mounting surface 12B of the flange portion 12 is formed with a recess 12a that is recessed in the direction of the plate-like core facing surface 12A, and the metal terminals 41 and 42 are mounted on the mounting portion 41A disposed on the mounting surface 12B of the flange portion 12, Because it has a conductor holding portion 41C that extends from the portion 41A into the recess 12a and is arranged in the recess 12a and holds the conductors 31, 32, all the connecting portions 31A, 32A are arranged in the vicinity of the recess 12a. The connecting portions 31A and 32A of the conducting wires 31 and 32 do not have to be disposed on the plate-shaped core facing surface 12A, and are part of the plate-shaped core facing surface 12A due to the presence of the connecting portions 31A and 32A. It is possible to avoid a reduction in the area of the portion that is fixed and in contact with the core 20.

  In addition, since the lead wire holding portion 41C is formed of a bent piece that is formed integrally with the mounting portion 41A and is formed of a part of the terminal fitting that is bent in the recess 12a, the lead wires 31 and 32 have a simple structure including the bent pieces. Can be held.

  Further, since the bent piece is bent on the vertical wall 12G, the bent piece can be arranged in the recess 12a and can be arranged on the vertical wall 12G. For this reason, the bent piece can be arranged without worrying about the crossing of dimensions, and no gap is formed between the bent piece and the flange portion 12, and the conductive wires 31 and 32 can be stably held by these. .

  Moreover, since the metal terminal 41 has the end surface part 41B arrange | positioned at the outer end surface 12E of the collar part 12 in the axial direction of the core part 11, when the coil component 1 is mounted in a mounting board, it is solder fillet to the end surface part 41B. Can be formed.

  The end surface portion 41B has an end surface portion base portion 41D extending in the Z-axis direction on the outer end surface 12E of the flange portion 12, and an end surface portion extending portion 41E extending from the end surface portion base portion 41D in the Y-axis direction. Therefore, the area of the end surface portion 41B can be further increased, and the adhesion area between the flange portion 12 and the outer end surface 12E can be further increased. For this reason, the metal terminal 41 can be more firmly fixed to the flange 12.

  Further, since the T-shaped protruding portion 12I protrudes in the direction away from the core portion 11 in the axial direction of the core portion 11, the area of the plate-shaped core facing surface 12A is increased by the amount of protrusion, and the plate shape The contact area of the core facing surface 12A with the plate-like core 20 can be increased. As a result, desired inductance characteristics and impedance characteristics required for the coil component 1 can be obtained. Further, the volume of the drum core 10 can be increased. Further, when the coil component 1 is manufactured, the protruding portion can be used as a portion for positioning the metal terminal 41.

  In addition, the flange portion 12 has a rectangular cross section cut by a surface orthogonal to the axial direction of the core portion 11, and one side of the rectangle constitutes the mounting surface 12 </ b> B, and the recess 12 a has both ends of one side of the rectangle. Therefore, the conductors 31 and 32 can be drawn from the core part 11 to the metal terminals 41 and 42 through the notched part, and the conductors 31 and 32 can be extracted from the core part 11 to the metal. The operation of pulling out to the terminals 41 and 42 can be facilitated.

  Further, portions of the metal terminals 41 and 42 which are connected by connecting the connecting portions 31A and 32A are connected to the metal terminals 41 and 42 extending from the end surface extending portions 41E and 42E. Therefore, it can be avoided that the metal terminals 41 and 42 have a complicated and complicated structure. For this reason, it can be set as the structure by which the metal terminals 41 and 42 were stably arrange | positioned with respect to the mounting parts 41A and 42A, and the one end part of the conducting wires 31 and 32 and the other end part were laser-welded to the metal terminals 41 and 42. Thus, the welded portion can be formed stably when connecting and connecting electrically.

  Next, a coil component according to a second embodiment of the present invention will be described with reference to FIGS. In the coil component 101 according to the second embodiment, the shape of the flange 112 and the shape of the metal terminals 141 and 142 are the same as the shape of the flange 12 and the metal terminals 41 and 42 of the coil component 1 according to the first embodiment. The shape is different. Since the configuration other than this is the same as the configuration of the coil component 1 according to the first embodiment, the same configuration is denoted by the same reference numeral and the description thereof is omitted.

  On the outer end surface 112E of the collar portion 112, instead of the T-shaped protruding portion 12I in the first embodiment, as shown in FIG. 7, an I-shaped long protruding portion 112I and a pair of I-shaped short protruding portions 112J , 112J. The I-shaped long projecting portion 112I is provided from the − side end portion of the flange portion 112 in the Z-axis direction to the + side end portion at the center position of the flange portion 112 in the Y-axis direction. In addition, the pair of I-shaped short protrusions 112J and 112J are respectively located at the + side end position and the − side end position of the flange portion 112 in the Y axis direction from the + side end portion of the flange portion 112 in the Z axis direction to the Z axis. It is provided until reaching the recess 12a in the negative direction. As shown in FIG. 6, the I-shaped long protruding portion 112I and the I-shaped short protruding portion 112J protrude in a direction away from the core portion 11 in the X-axis direction. It is the same in all the parts forming the letter shape.

  On the plate-shaped core facing surface 112A of the flange portion 112, facing surface recesses 112b and 112b that are recessed toward the mounting surface 12B are formed. The facing surface recesses 112b and 112b are a part of the plate-like core facing surface 112A, and face the portion of the mounting surface 12B where mounting portions 141A and 142A of metal terminals 141 and 142 described later are arranged in the Z-axis direction. Each part is formed. One engaging recess 112c, 112c, which is further recessed in the direction of the mounting surface 12B, is formed in the center of the opposing surface recess 112b, 112b. Further, a portion of the mounting surface 12B of the flange portion 112 and a portion facing the mounting portions 141A and 142A of the metal terminals 141 and 142, which will be described later, is recessed not shown in the direction of the plate-shaped core facing surface 112A. A concavity is formed.

  As shown in FIG. 8, the metal terminals 141 and 142 have mounting portions 141A and 142A, end surface portions 141B and 142B, and locked portions 141G and 142G, respectively, each having a plate shape. The mounting parts 141A and 142A have a substantially rectangular shape, and are part of the mounting surface 12B of the flange part 112, and are disposed on the end part in the Y-axis + direction and on the end part in the Y-axis-direction.

  In the mounting portions 141A and 142A, holding portion connecting portion base portions 141H and 142H, conducting wire holding portion tip portions 141C and 142C, and electrode connecting portions 141F and 142F are integrally provided with the mounting portions 141A and 142A. The holding portion connecting portion base portions 141H and 142H extend from the mounting portions 141A and 142A into the recess 12a, and extend in the Z-axis + direction on the vertical wall 12G. And it branches into two and becomes conducting wire holding | maintenance part front-end | tip part 141C, 142C and electrode connection part 141F, 142F, these are return | folded by the Z-axis negative direction and are accommodated in the recessed part 12a.

  Lead wire holding part front-end | tip parts 141C and 142C and holding | maintenance part connection part base part 141H and 142H hold | maintain and hold | maintain the one end part vicinity of the conducting wires 31 and 32, and the other end part vicinity. Lead wire holding portion tip portions 141C and 142C and holding portion connecting wire base portions 141H and 142H correspond to a lead wire holding portion and a bent piece. In addition, the electrode connecting portions 141F and 142F in a state before being welded to one end and the other end of the conducting wires 31 and 32 are configured to be longer in the X-axis direction than the leading end portions 141C and 142C of the conducting wire holding portions. One end or the other end of each of the conducting wires 31 and 32 is laser-welded one by one to the electrode connecting portions 141F and 142F so that one end or the other end of the conducting wires 31 and 32 is electrically connected. It is lined. Further, convex portions 141K and 142K are provided on the surfaces of the mounting portions 141A and 142A on the Z axis + direction side, and convex when the mounting portions 141A and 142A are arranged on the mounting surface 12B of the flange portion 112. The portions 141K and 142K are engaged with engagement recesses (not shown) of the flange portion 112.

  The end surface portions 141B and 142B are integrally provided on one side of the mounting portions 141A and 142A having a substantially rectangular shape, and have a positional relationship orthogonal to the mounting portions 141A and 142A. The end surface portions 141B and 142B are formed by end surface base portions 141D and 142D having a substantially rectangular shape whose longitudinal direction is directed in the Z-axis direction, respectively, and from the Z-axis direction end portion of the outer end surface 112E of the flange portion 112 to the Z-axis + direction. It is arranged in a strip shape on the outer end surface 112E up to the end. On the outer end surface 112E of the collar portion 112, the aforementioned I-shaped long protruding portion 112I and the I-shaped long protruding portion 112I are disposed at portions other than the portion where the end surface portions 141B and 142B are disposed.

  The locked portions 141G and 142G are provided integrally with the end surface portions 141B and 142B at the end portions in the Z-axis + direction of the end surface portions 141B and 142B. The locked portions 141G and 142G extend from the end surface portions 141B and 142B in the X axis direction and in a direction approaching the core portion 11, and the convex portions 141L and 142L are provided on the surface on the Z axis negative direction side. It has been. The convex portions 141L and 142L are engaged with the engagement concave portions 112c of the flange portion 112 when the locked portions 141G and 142G are engaged with the opposing surface concave portions 112b and 112b of the plate-shaped core opposing surface 112A of the flange portion 112, respectively. 112c is engaged. The metal terminals 141 and 142 are locked to and fixed to the flange 112 by this and the protrusions 141K and 142K engaging with an engagement recess (not shown) of the flange 112.

  The to-be-latched portions 141G and 142G are part of the plate-shaped core facing surface 112A and do not protrude in the Z axis + direction from portions other than the portions where the facing surface recesses 112b and 112b are formed. It is accommodated in the recesses 112b and 112b. Further, the widths of the locked portions 141G and 142G in the Y-axis direction are smaller than the widths of the end surface portions 141B and 142B in the same direction, and the areas of the locked portions 141G and 142G are the mounting portions 141A and 142A on the mounting surface 12B. Is smaller than the area.

  In addition, the metal terminals 141 and 142 have locked portions 141G and 142G, and the area of the locked portions 141G and 142G is smaller than the area of the mounting portions 141A and 142A, so that the locked portions 141G and 142G exist. Thus, it is possible to avoid as much as possible that the area of a part of the plate-shaped core facing surface 112A that is fixed to and contacts the plate-shaped core 20 is reduced.

  In addition, facing plate recesses 112b and 112b that are recessed toward the mounting surface 12B are formed on the plate-shaped core facing surface 112A of the flange 112, and the locked portions 141G and 142G are accommodated in the facing surface recesses 112b and 112b. Therefore, it is possible to prevent the locked portions 141 </ b> G and 142 </ b> G from projecting from the plate core facing surface 112 </ b> A in the direction of the plate core 20 and coming into contact with the plate core 20. For this reason, it is possible to come into contact with the plate-shaped core 20 in a part of the plate-shaped core facing surface 112A and the entire portion other than the facing surface recesses 112b and 112b.

  Further, a part of the metal terminals 141 and 142 that is connected to the connecting portions 31A and 32A is connected from the portions of the metal terminals 141 and 142 extending from the mounting portions 141A and 142A. Therefore, the welding balls formed by melting the electrode connecting portions 141F and 142F and the connecting portions 31A and 32A, the lead wire holding portion tip portions 141C and 142C, and the holding portion connecting portion base portions 141H and 142H are recessed. 12a.

  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 metal terminals 41 and 42 of the coil component 1 according to the first embodiment did not have the locked portions 141G and 142G as in the second embodiment, but as shown in FIG. Similarly to the second embodiment, the end surface bases 241D and 242D of the end surfaces 241B and 242B are on the outer end surface 212E from the Z-axis-direction end to the Z-axis + direction end of the outer end surface 212E of the flange portion 212. The coil component 201 may be configured to be provided in a band shape, and the locked portions 241G and 242G are integrally provided with the end surface portions 241B and 242B at the Z axis + direction end portions of the end surface portions 241B and 242B. As in the second embodiment, the locked portions 241G and 242G extend from the end surface portions 241B and 242B in the X-axis direction and in a direction approaching the core portion 11, and are not illustrated. It engages with a concave portion of the opposing surface (not shown), and is locked and fixed to the flange portion 212.

  Further, the shape of the metal terminal is not limited to the shape of the metal terminals 41, 42, 141, 142 described above. For example, like the metal terminal 241 shown in FIG. 10, it is good also as a structure which replaces with the electrode connection part 41F of the metal terminal 41 in 1st Embodiment, and extends the electrode connection part 241F from the mounting part 41A. .

  More specifically, as shown in FIG. 11 and the like, the conductor holding portion 241C is configured to have a short width in the X-axis direction, and is a part of the mounting portion 41A that is closer to the end portion in the X-axis direction. The electrode connecting portion 241F extends in the Z axis + direction. The electrode connecting portion 241F is bent so as to be parallel to the XY plane, and the portion on the extended end side from the bent portion further extends in the X-axis direction, and is more than the end surface portion 41B. It branches into two at the position in the X axis direction, and further extends in the X axis direction and the Z axis direction.

  When the conducting wire 32 is connected to the electrode connecting portion 241F, the conducting wire 32 is disposed between the portion 241C-1 and the portion 241C-2 of the conducting wire holding portion 241C, and the conducting wire holding portion is sandwiched between the conducting wires 32. The conductor 32 is sandwiched between the portion 241C-1 and the portion 241C-2 by bending the 241C. In addition, the conducting wire 32 is disposed to face the Z-axis-side portion of the electrode connecting portion 241F and parallel to the XY plane, and, as in the first embodiment, one of the electrode connecting portions 241F. When the laser beam is simultaneously applied to the two branched portions and the conductor 32 and laser welding is performed, one end or the other end of each of the conductors 31 and 32 is connected to the electrode joint one by one. It is electrically connected and connected to the line portion 241F.

  Moreover, one end part and other end part of conducting wire 31 and 32 are electrically connected with the metal terminals 41 and 42 in the position which is near the recessed part 12a, and opposes the recessed part 12a in a X-axis direction, and is connected part 31A, 32A. However, the connecting portions 31A and 32A may be formed by being electrically connected to the metal terminals 41 and 42 in the recess 12a.

  Further, nickel and tin are plated on one surface of the metal terminals 41 and 42, and phosphor bronze is exposed as it is on the other surface, but the present invention is not limited to this configuration. For example, the entire surface of the terminal fitting constituting the metal terminals 41 and 42 may be plated in advance.

  Moreover, although the one end part and other end part of the conducting wires 31 and 32 were electrically connected and connected to the metal terminals 41 and 42 by laser welding, the method of electrically connecting and connecting them is this method. It is not limited. For example, arc welding may be used.

  Moreover, although the conducting wires 31 and 32 were wound around the core part 11 by what is called two-layer winding by which the conducting wire 32 was wound around the conducting wire 31 wound around the winding core part 11, this winding The method is not limited. For example, a winding method in which two conductive wires are wound around the core portion 11 in parallel at the same time may be used.

  Further, the convex portions 141L and 142L are engaged with the engagement concave portions 112c and 112c of the flange portion 112, and the convex portions 141K and 142K are engaged with the engagement concave portion (not shown) of the flange portion 112, whereby the metal terminal 141, 142 is locked and fixed to the collar part 112, but the metal terminals 141 and 142 may be further firmly fixed to the collar part 112 using an adhesive.

  The present invention is particularly useful in the field of small coil components that are fixed in such a manner that the plate-like core is in contact with the flange portion of the drum core.

DESCRIPTION OF SYMBOLS 1 Coil component 10 Drum core 11 Winding core part 12, 112 Edge part 12A Plate-shaped core opposing surface 12B Mounting surface 12E Outer end surface 12G Vertical wall 12I T-shaped protrusion part 12a Recess 20 Plate-shaped core 31, 32 Conductor 31A, 32A Connection Portions 41, 42, 141, 142, 241 Metal terminals 41A, 141A, 142A Mounting portions 41B, 141B, 142B End surface portions 41C, 141C, 142C, 241C Conductive wire holding portions 41D End surface portion base portions 41E End surface portion extending portions 41F, 141F, 142F, 241F Electrode connecting portions 112b, 112b Opposite surface recess 112I I-shaped long protruding portion 112J, 112J I-shaped short protruding portion 141C, 142C Lead wire holding portion distal end portion 141G, 142G Locked portion

Claims (11)

A drum core comprising: a pair of flange portions each having a mounting surface that can be opposed to the mounting substrate; and a plate-shaped core facing surface disposed opposite to the mounting surface; and a winding core portion that connects the pair of flange portions to each other; ,
A plate-like core having a substantially plate shape and having both longitudinal ends fixed to the plate-like core facing surfaces of the pair of flanges;
A metal terminal made of a terminal fitting and disposed on the flange,
A conducting wire wound around the core and having one end and the other end electrically connected to the metal terminal to form a connecting portion;
On the mounting surface of the flange portion, a recess is formed that is recessed in the direction of the plate-like core facing surface,
The metal terminal includes a mounting portion disposed on the mounting surface of the flange portion, and a conductor holding portion that extends from the mounting portion into the recess and is disposed in the recess to hold the conductor. ,
All the connecting portions are arranged in the recess or in the vicinity of the recess.   2. The coil component according to claim 1, wherein the conducting wire holding portion is formed of a bent piece that is formed integrally with the mounting portion and is formed of a part of a terminal fitting that is bent in the recess.   3. The coil component according to claim 2, wherein the bent piece is bent on a surface of the flange portion that defines the concave portion and connected to the mounting surface.   The coil component according to any one of claims 1 to 3, wherein the metal terminal has an end surface portion disposed on an end surface of the flange portion in the axial direction of the core portion.   The metal terminal has a locked portion that is connected to the end surface portion and locked to the surface facing the plate-like core of the flange portion, and the area of the locked portion is smaller than the area of the mounting portion. The coil component according to claim 4.   6. The opposed surface concave portion that is recessed in the direction of the mounting surface is formed on the surface of the flange portion facing the plate-like core, and the locked portion is accommodated in the opposed surface concave portion. The coil component described.   The end surface portion has an end surface portion base portion extending in one direction on the end surface of the flange portion, and an end surface portion extending portion extending from the end surface portion base portion in a direction intersecting the end surface portion base portion. The coil component according to any one of claims 4 to 6, wherein:   A part of the metal terminal, which is connected to the connecting portion by electrical connection, includes a portion of the metal terminal that extends from the end surface portion extending portion. Item 8. The coil component according to Item 7.   The part of the metal terminal, which is connected by connecting the connecting portion electrically, includes a portion of the metal terminal extending from the mounting portion. The coil component according to claim 7.   The entire portion of the end portion of the flange portion other than the portion where the end surface portion of the metal terminal is disposed protrudes in a direction away from the core portion in the axial direction of the core portion. The coil component according to any one of claims 4 to 9, wherein the coil component is provided.   The flange portion has a rectangular cross section cut by a plane perpendicular to the axial direction of the winding core portion, and one side of the rectangle constitutes the mounting surface, and the concave portion is formed at both ends of the one side of the rectangle. The coil component according to any one of claims 1 to 10, wherein the coil component has a shape with a corner cut away.

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