JP4793663B2 - Coil parts - Google Patents

Description

  The present invention relates to a coil component, and more particularly, to a coil component including a drum core around which a conducting wire is wound and an outer peripheral core disposed to face a peripheral surface of the drum core.

2. Description of the Related Art Conventionally, a coil component is known that includes a drum core around which a conducting wire is wound and an outer peripheral core disposed to face the peripheral surface of the drum core. The drum core includes a pair of substantially disk-shaped flanges and a core part that connects the pair of flanges to each other, and a conductive wire is wound around the core part. As the outer core, for example, a ring-shaped ring core having a through-hole formed in the center is used, the drum core is inserted into the through-hole of the ring core, and the inner peripheral surface of the ring core is disposed so as to face the peripheral surface of the drum core. The The ring core is provided with a pair of terminal fittings having a substantially plate shape so as to sandwich the flange portion of the drum core, and one end and the other end of the conducting wire are electrically connected and connected. A part of the terminal fitting is disposed between the peripheral surface of the flange portion of the drum core and the inner peripheral surface of the ring core, and a gap (gap) having a predetermined width is formed between the ring core and the drum core by a part of the terminal fitting. Is formed. Such a coil component is described in, for example, Japanese Patent Application Laid-Open No. 2007-234485 (Patent Document 1).
JP 2007-234485 A

  In the conventional coil component, since a part of one terminal fitting is arranged between the ring core and the drum core, the ring core and the drum core are arranged in a direction in which the terminal fittings arranged in pairs are connected to each other. The drum core abuts against the terminal fitting placed between the two, and the movement of the drum core in the same direction can be restricted, but the direction perpendicular to the same direction and perpendicular to the axis of the core portion It is difficult to restrict the movement of the drum core in the case where only two terminal fittings are provided. Moreover, it has been difficult to reliably ensure a desired gap between the drum core and the ring core in the same direction. If it is difficult to reliably secure the gap between the drum core and the ring core to a desired value in this way, there arises a problem that it is difficult to set the DC superposition characteristics to a desired value.

  Therefore, the present invention restricts the movement of the drum core even in the direction perpendicular to the direction in which the two terminal fittings are connected, and the coil component can reliably ensure the gap between the drum core and the outer peripheral core in the same direction at a desired value. The purpose is to provide.

In order to achieve the above object, the present invention provides a drum core comprising a pair of flange portions and a core portion that connects the pair of flange portions to each other, and a wire wound around the core portion of the drum core; An outer peripheral core that is configured separately from the drum core and has an inner surface that is disposed opposite to the peripheral surface of the flange portion of the drum core via a predetermined gap; and at least two ends of the conducting wire provided on the outer peripheral core or the other end and a substantially plate-shaped terminal fitting is connecting wire is electrically connected, at least one of the terminal fitting has at least two claws arranged at a position separated from one another, said at least The portions near the tip of the two claw portions are bent with respect to the portion near the base end of the claw portion so as to be substantially along the inner surface of the outer core and are locked to the inner surface of the outer core. The portion near the tip is the peripheral surface of the flange of the drum type core Can contact, claw portion is bent so as wherein the at least tip side of the portions of the two claw portions toward the distal end of the claw portion extending spaced apart from each other in a substantially circumferential direction of the drum core It provides a coil component you are.

At least two terminal fittings provided on the outer peripheral core and connected to one end or the other end of the conducting wire are electrically connected to each other, and at least one of the terminal fittings is disposed at a position separated from each other. It has two claw portions, and at least the two claw portions near the tip are bent with respect to the portion near the base end of the claw portion so as to be substantially along the inner surface of the outer core and locked to the inner surface of the outer core. Since the portion near the tip of the claw portion can contact the peripheral surface of the flange portion of the drum core, the drum core is in both directions, the direction connecting the two terminal fittings and the direction orthogonal to the direction connecting the two terminal fittings. Can be restricted. In addition, the gap between the drum core and the outer peripheral core in both directions can be reliably ensured to a desired value. In addition, since the claw portions are bent so that the portions near the front ends of the at least two claw portions are spaced apart from each other in the substantially circumferential direction of the drum core toward the tip of the claw portion, they are separated from each other in the substantially circumferential direction of the drum core. The claw portion can be brought into contact with the peripheral surface of the flange portion of the drum core at the position, and the gap can be secured more reliably.

  Here, the part of the boundary line between the proximal portion and the distal portion defined by bending the proximal portion of the claw portion with respect to the proximal portion of the claw portion, A bent portion connecting one end edge in the width direction of the claw portion and the other end edge is formed, and the portion of the bent portion at one end edge in the width direction of the claw portion is formed on the inner peripheral surface of the outer peripheral core. It is preferable that the bent portion at the other edge in the width direction of the claw portion is in contact with the inner peripheral surface of the outer peripheral core.

  The portion of the boundary line between the proximal portion and the distal portion defined by bending the proximal portion of the claw portion to the proximal portion of the claw portion is one side in the width direction of the claw portion. A bent portion connecting one end edge of the nail portion to the other end edge, and the portion of the bent portion at one end edge in the width direction of the claw portion contacts the inner peripheral surface of the outer core, and the other end portion in the width direction of the nail portion Since the portion of the bent portion at the end edge is separated from the inner peripheral surface of the outer peripheral core, the other end in the width direction of the nail portion can be adjusted by adjusting the bending direction as the boundary line direction with respect to the width direction of the nail portion. It is possible to adjust the separation distance at which the portion of the bent portion at the edge is separated from the inner peripheral surface of the outer core, and thereby, the portion of the claw portion that contacts the peripheral surface of the drum core from the inner peripheral surface of the outer core. The distance can be adjusted. As a result, the gap can be reliably secured in a state where the gap between the drum core and the outer core is adjusted to a desired value.

  Moreover, it is preferable that each said collar part has comprised the substantially disk shape. Since each of the collar portions has a substantially disk shape, it is not necessary to provide a corner portion on the collar portion. For this reason, the claw portion does not need to contact the corner portion. As a result, it is possible to prevent a problem that the claw portion comes into contact with the corner portion and the corner portion of the collar portion is broken.

  Moreover, it is preferable that the conducting wire is connected to a portion of the terminal fitting other than the claw portion. Since the lead wire is connected to the terminal metal part other than the claw part, the part of the lead wire drawn out from the core part to the terminal metal part or the part of the lead wire connected to the terminal metal part is connected to the claw. It can arrange | position in the position spaced apart from the position in which the part is provided.

  In addition, the outer peripheral core is formed of a ring core provided so as to wrap around the drum core, and the ring core forms a polygon having a predetermined thickness in the axial center direction of the core portion of the drum core. At least one corner of the terminal fitting has a chamfered chamfered portion, a part of the terminal fitting is disposed on the chamfered portion, and the conductive wire is disposed on the portion of the terminal fitting disposed on the chamfered portion. It is preferable that it is connected.

  The outer peripheral core is composed of a ring core provided so as to wrap around the drum core. The ring core has a polygon having a predetermined thickness in the axial direction of the core of the drum core, and at least one corner of the polygon is chamfered. Since a part of the terminal fitting is arranged on the chamfered portion and the conductor is connected to the portion of the terminal fitting arranged on the chamfered portion, it is connected to the terminal fitting. It can be set as the coil component which the connection part which is a part of the conducting wire which does not protrude from the polygon which makes the external shape of a ring core.

  Moreover, it is preferable that the expansion | deployment shape makes this square nail | claw part before bending. Since the unfolded claw portion has a square shape, the terminal fitting can be easily manufactured. For this reason, the dimensional accuracy of a terminal metal fitting can be raised.

  Moreover, it is preferable that the portion of the claw portion near the tip is bent at an acute angle with respect to the portion of the claw portion near the base end. Since the portion near the tip of the claw is bent at an acute angle with respect to the portion near the base end of the claw, the acute angle is adjusted by adjusting the folding position of the claw, and the outer core and the drum core It is possible to adjust the distance from the inner surface of the outer peripheral core to the bent portion in the direction connecting the two. As a result, the gap between the drum core and the outer peripheral core can be adjusted more easily.

  As described above, the present invention regulates the movement of the drum core even in the direction perpendicular to the direction connecting the two terminal fittings, and can reliably ensure the gap between the drum core and the outer peripheral core in the same direction at a desired value. Parts can be provided.

  A coil component according to an embodiment of the present invention will be described with reference to FIGS. In the following embodiments, when a coil component is mounted on a circuit board, the circuit board is positioned vertically below the coil component and the mounting surface of the circuit board extends in the horizontal direction. A direction and a horizontal direction are defined, and the vertical upper direction will be described below as a direction indicated by an arrow of the axis Z in the drawing.

  The coil component 1 includes a drum core 10 around which a conducting wire 20 is wound, a ring core 30 that includes the drum core 10 and forms a magnetic path together with the drum core 10, and is mounted on the outer peripheral surface 31 of the ring core 30 and the conducting wire 20 is connected to the coil component 1. This is an inductance element composed of two terminal electrodes 40, 40.

  As shown in FIG. 1B, the drum core 10 includes a cylindrical core part 11 extending in the direction of the axis Z, and provided at both ends of the core part 11 in a direction perpendicular to the direction of the axis Z. The upper flange portion 12 and the lower flange portion 13 extend, and the core portion 11, the upper flange portion 12, and the lower flange portion 13 are integrally formed in a bobbin shape with a ferromagnetic material such as ferrite. Yes. A conducting wire 20 is wound around the winding core 11 in a coil shape. The conducting wire 20 is made of an insulation-coated copper wire, and is constituted by a so-called pair wire in which two wires that are insulated and coated with each other are paired.

  Each of the upper flange portion 12 and the lower flange portion 13 has a circular disk shape having a thickness in the direction of the axis Z and a radius of about 7.7 mm. The upper flange portion 12 is located between the inner surface 12a connected to the core portion 11, the outer surface 12b opposite to the inner surface 12a, and the inner surface 12a and the outer surface 12b, and is in the direction of the axis Z, that is, the thickness direction. And the peripheral surface 12c. Similarly, the lower flange 13 is positioned between the inner surface 13a connected to the core 11, the outer surface 13b opposite to the inner surface 13a, and the inner surface 13a and the outer surface 13b in the direction of the axis Z, That is, it consists of a peripheral surface portion 13c extending in the thickness direction.

  The ring core 30 has an outer peripheral surface 31 and an inner peripheral surface 32, and both ends in the direction of the axis Z which is the axial center direction thereof, that is, one end 33 and the other end 34 in the vertical direction in FIG. It is formed of the same ferromagnetic material as that of the drum core 10. The inner peripheral surface 32 corresponds to the inner surface of the outer peripheral core. Further, as shown in FIG. 1A, the ring core 30 has a square shape whose outer shape has a predetermined thickness in the direction of the axis Z and whose side is approximately 10 mm, and is located on one diagonal line. A pair of corners forms an R chamfered portion 35 that has been subjected to R machining, and a pair of corners located at other diagonal lines forms a C chamfered portion 36 that has been subjected to C surface machining. The first side 30a, the second side 30b, the third side 30c, and the fourth side 30d, which are the four sides of the square before chamfering, remain as they are in a portion between the R chamfered portion 35 and the C chamfered portion 36 in plan view. ing.

  The ring core 30 is formed with notches 30A and 30B. The notches 30A and 30B are formed from approximately the center position of the two C chamfered portions 36 of the ring core 30 having a square shape in plan view to approximately the center position of the first side 30a and the third side 30c of the square, and the axis Z Opening is made in the end surface 33 a of the one end portion 33 of the ring core 30 in the direction, the outer peripheral surface 31, and the inner peripheral surface 32. The conducting wire 20 wound around the core portion 11 of the drum core 10 through the notches 30A and 30B can be drawn out to the electrode connecting portion 44 disposed on the C chamfered portion 36 of the terminal electrode 40 described later. It is configured. In FIG. 1 and FIG. 2, illustration of the portion of the conductive wire 20 drawn through the notches 30A and 30B is omitted for convenience of explanation.

  The inner peripheral surface 32 of the ring core 30 has a cylindrical shape. The diameter of the inner peripheral surface 32 is formed to be slightly larger than the diameters of the upper flange portion 12 and the lower flange portion 13 of the drum core 10, and the drum core 10 is housed substantially coaxially within the inner peripheral surface 32. Further, as shown in FIG. 1B, the height of the drum core 10 in the axis Z direction is slightly higher than the height of the ring core 30 in the same direction, and most of the drum core 10 is within the ring core 30. It is configured to be accommodated in the peripheral surface 32. The ring core 30 corresponds to an outer peripheral core.

  As shown in FIG. 3, the terminal electrode 40 is constituted by a terminal fitting formed by bending a conductive metal piece having a substantially plate shape with a thickness of about 0.1 mm. The terminal electrode 40 is disposed on the end face of the other end 34 of the ring core 30 and extends in the horizontal direction. The terminal electrode 40 is adjacent to the bottom piece 41 and extends in the axis Z direction. And a side piece portion 42 disposed on a portion corresponding to the second side 30b and the fourth side 30d having a square shape in plan view, and an upper portion disposed on the end surface 33a of the one end portion 33 of the ring core 30. A piece portion 43 and an electrode connecting portion 44 disposed on the C chamfered portion 36 adjacent to the side piece portion 42 are provided.

  The bottom piece 41 extends inward in the radial direction of the drum core 10 and is disposed in the vicinity of the edge in the radial direction of the lower flange portion 13 of the drum core 10 as shown in FIG. It is in contact with the flange 13. The side piece portion 42 is disposed from one end portion 33 to the other end portion 34 of the outer peripheral surface 31 of the ring core 30 in the axis Z direction.

  As shown in FIG. 2, the electrode connecting portion 44 has a width of about one third from the one end portion 33 to the other end portion 34 of the outer peripheral surface 31 of the ring core 30 in the axis Z direction. The ring core 30 extends from the side piece 42 onto the C chamfered portion 36 of the ring core 30 at a substantially central position of the outer peripheral surface 31 of the ring core 30. As shown in FIG. 1A, the electrode connecting portion 44 has a folded portion 44 a that is bent in a J shape at a substantially central position of the C chamfered portion 36. One end and the other end of the conducting wire 20 are disposed in the folded portion 44a, and the conducting wire 20 and the electrode connecting portion 44 are electrically connected and connected by welding or soldering. Actually, a weld ball by welding or the like is formed on the folded portion 44a, but in FIG. 1 and FIG. 2, illustration is omitted for convenience of explanation.

  As shown in FIG. 3A, the upper piece 43 has a developed state in a state before being arranged on the ring core 30, that is, in a state before the claw portion 43a is bent as described later. It has a U shape. A pair of claw portions 43a, 43a having a rectangular shape in which the U-shapes are spaced apart from each other and extend in parallel with each other in the longitudinal direction, and the base ends with respect to the distal ends of the pair of claw portions 43a, 43a are respectively long. When considered as a configuration comprising a rectangular upper piece base portion 43b connected to one end and the other end of the direction, the upper piece base portion 43b is formed by the one end portion 33 of the ring core 30 as shown in FIG. It arrange | positions on the end surface 33a.

  The pair of claw portions 43a and 43a are located on the end surface 33a of the one end portion 33 of the ring core 30 and inwardly in the radial direction of the drum core 10 and with one terminal electrode 40 (the right terminal electrode 40 in FIG. 1A). It extends in a direction connecting the other terminal electrode 40 (the terminal electrode 40 on the left side in FIG. 1A), and is in a substantially axial direction of the drum core 10 at a substantially central position between the proximal end and the distal end of the claw portion 43a. As shown in FIG. 3 (b), the drum core 10 is bent at a right angle in a direction toward the substantially lower collar portion. The bent portion forms a bent portion 43c that is a portion of a boundary line that divides the claw portion 43a into a proximal end side portion 43g that is a portion closer to the proximal end and a distal end side portion 43f that is a portion closer to the distal end. The bent portion 43c is provided in a straight line connecting one end edge 43d in the left-right direction in FIG. 3A, which is the width direction of the claw portion 43a, and the other end edge 43e, and the direction in which the bent portion 43c is directed. As shown in FIG. 3A, an angle of about 25 ° is formed with respect to the width direction of the claw portion 43a so that the distal end side portion 43f spreads in a substantially reverse letter C shape. That is, the front end side portions 43f of the claw portions 43a and 43a are bent so as to spread apart from each other in the substantially circumferential direction of the drum core 10.

  Each of the one metal terminal and the other metal terminal is bent at one end edge 43d in the width direction of the pair of claw portions 43a and 43a corresponding to the inner edge of the upper piece 43 having a substantially U-shape. The portion 43 c is in contact with the inner peripheral surface 32 of the ring core 30. On the other hand, the portion of the bent portion 43c at the other end edge 43e in the width direction of the pair of claw portions 43a and 43a corresponding to the outer edge of the upper piece portion 43 having a substantially U-shape is the ring core 30. It is spaced apart from the inner peripheral surface 32. For this reason, the tip of the pair of claws 43a and 43a in contact with the inner peripheral surface 32 of the ring core extends from the bent portion 43c at one end edge 43d in the width direction to the tips of the claws 43a and 43a. The one end edge 43 d of the side portion 43 f is in contact with the inner peripheral surface 32 of the ring core 30 and is locked to the inner peripheral surface 32 of the ring core 30.

  Further, the direction in which the bent portion 43c is directed is approximately 25 ° with respect to the width direction of the claw portions 43a and 43a so that the distal end side portion 43f spreads in a substantially inverted C shape as shown in FIG. Coupled with the angle, the tip side portions 43f of the claw portions 43a and 43a are configured such that the distance away from the inner peripheral surface 32 of the ring core 30 gradually increases as the tip is approached.

  The tip portions of the claw portions 43a and 43a can be brought into contact with the peripheral surface of the upper flange portion 12 of the drum core 10, and the direction connecting the two terminal electrodes 40 by this contact, that is, the left-right direction in FIG. The movement of the drum core 10 is restricted, and a gap of about 0.221 mm is reliably ensured between the inner peripheral surface 32 of the ring core 30 and the peripheral surface of the upper flange 12 of the drum core 10 in the same direction. Further, the claw portions 43a and 43a are bent so that the front end portions 43f of the claw portions 43a and 43a are separated from each other in the substantially circumferential direction of the drum core 10 and the front end side portions 43f and 43f of the claw portions 43a and 43a approach the front end. As the distance away from the inner peripheral surface 32 of the ring core 30 gradually increases, as shown in FIG. 1A, the claw portions 43a, 43a, the tip side portions 43f of the claw portions 43a, 43f is supported so that the upper flange 12 of the drum core 10 is substantially sandwiched from the direction perpendicular to the direction connecting the two terminal electrodes 40, that is, the vertical direction of FIG. 1A. The movement of the drum core 10 in the direction is restricted, and a gap of about 0.130 mm is formed between the inner peripheral surface 32 of the ring core 30 and the peripheral surface of the upper flange 12 of the drum core 10 in the same direction. Surely it is ensured.

  Two ring cores 30 are provided with a substantially plate-like terminal electrode 40 which is connected to one end or the other end of the conducting wire 20 electrically connected to each other, and the terminal electrodes 40 are arranged at two positions separated from each other. The claw portions 43a and 43a have claw portions 43a and 43a, and the claw portions 43a and 43a have their distal side portions 43f and 43f bent with respect to the portions near the base ends of the claw portions 43a and 43a so as to substantially follow the inner peripheral surface 32 of the ring core 30. Thus, the front end side portions 43f and 43f of the claw portions 43a and 43a can be brought into contact with the peripheral surface of the collar portion of the drum core 10, so that the two terminal electrodes 40 and 40 are locked. The movement of the drum core 10 can be restricted in both the direction connecting the two terminal electrodes 40 and 40 and the direction orthogonal to the direction connecting the two terminal electrodes 40, 40. In addition, the gap between the drum core 10 and the ring core 30 in both directions can be reliably ensured to a desired value.

  Further, the base end side portions 43g, 43g and the tip end side portion 43f, which are defined by bending the tip end side portions 43f, 43f of the claw portions 43a, 43a with respect to the base end side portions 43g, 43g of the claw portions 43a, 43a, The part of the boundary line with 43f comprises bent portions 43c, 43c that connect one end edge 43d, 43d in the width direction of the claw portion 43a, 43a and the other end edge 43e, 43e, of the claw portion 43a, 43a. The bent portions 43c and 43c at one end edge 43d and 43d in the width direction are in contact with the inner peripheral surface 32 of the ring core 30, and the bent portion 43c at the other end edge 43e and 43e in the width direction of the claw portions 43a and 43a. , 43c are separated from the inner peripheral surface 32 of the ring core 30, so that the claw portion 43a can be adjusted by adjusting the bending direction as the boundary line direction with respect to the width direction of the claw portions 43a, 43a. The distance at which the bent portions 43c and 32c of the other edge 43e and 43e in the width direction of 43a are separated from the inner peripheral surface 32 of the ring core 30 can be adjusted. It is possible to adjust the distance from the inner peripheral surface 32 of the ring core 30 at the claw portions 43a and 43a that are in contact with the surface. As a result, the gap can be reliably secured in a state where the gap between the drum core 10 and the ring core 30 is adjusted to a desired value.

  Further, since each of the collar portions has a substantially disk shape, it is not necessary to provide a corner portion on the collar portion. Therefore, the claw portions 43a and 43a do not need to contact the corner portion. As a result, it is possible to prevent a problem that the claw portions 43a and 43a come into contact with the corner portion and the corner portion of the collar portion is broken.

  Further, the claw portions 43a and 43a are bent so that the front end side portions 43f and 43f of the at least two claw portions 43a and 43a spread away from each other in the substantially circumferential direction of the drum core 10 toward the front ends of the claw portions 43a and 43a. Therefore, the claw portions 43a and 43a can be brought into contact with the peripheral surface of the flange portion of the drum core 10 at positions separated from each other in the substantially circumferential direction of the drum core 10, and a gap can be secured more reliably.

  Moreover, since the conducting wire 20 is connected to the electrode connecting portion 44 which is a portion of the terminal electrode 40 other than the claw portions 43a and 43a, the portion of the conducting wire 20 drawn from the winding core portion 11 to the terminal electrode 40 or the terminal electrode The connecting portion that is a part of the conducting wire 20 connected to 40 can be arranged at a position separated from the position where the claw portions 43a and 43a are provided.

  The outer peripheral core is composed of a ring core 30 provided so as to wrap around the drum core 10, and the ring core 30 forms a square having a predetermined thickness in the axial center direction of the core part 11 of the drum core 10. The corner has a C chamfered portion 36 that has been chamfered, a part of the terminal electrode 40 is disposed on the C chamfered portion 36, and the conductor 20 is a portion of the terminal electrode 40 disposed on the C chamfered portion 36. Therefore, the coil part 1 that does not protrude from the square that forms the outer shape of the ring core 30 can be obtained as a part of the conductor 20 that is connected to the terminal electrode 40.

  Further, since the unfolded claw portions 43a and 43a have a square shape, the terminal electrode 40 can be easily manufactured. For this reason, the dimensional accuracy of the terminal electrode 40 can be improved.

  Further, since the distal end side portions 43f and 43f of the claw portions 43a and 43a are bent at an acute angle with respect to the proximal end side portions 43g and 43g of the claw portions 43a and 43a, the folding positions of the claw portions 43a and 43a are adjusted. Thus, the acute angle can be adjusted, and the distance from the inner peripheral surface 32 of the ring core 30 to the bent portion 43c in the direction connecting the ring core 30 and the drum core 10 can be adjusted. As a result, the gap between the drum core 10 and the ring core 30 can be adjusted more easily.

  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 outer peripheral core is composed of the ring core 30, but is not limited to the ring core 30. For example, the ring core 30 may be divided into a plurality of parts, and the peripheral core may be formed by combining the parts of the ring cores 30 thus divided.

  Further, the pair of claw portions 43a and 43a are bent at a right angle in a direction substantially toward the axial center of the drum core 10 and toward a substantially lower collar portion of the drum core 10 at a substantially central position between the base end and the distal end. However, it is not limited to a right angle. For example, it may be bent at an acute angle. In this case, the other edge 43e in the width direction of the pair of claws 43a and 43a spaced from the inner peripheral surface 32 of the ring core 30 is adjusted by adjusting the angle of bending. The distance from the bent portion 43c to the inner peripheral surface 32 of the ring core 30 can be adjusted. As a result, the gap from the inner peripheral surface 32 of the ring core 30 to the peripheral surface of the upper flange portion 12 of the drum core 10 can be adjusted. Can be adjusted.

  In addition, the drum core 10 has a substantially disk shape, but is not limited thereto. For example, the drum core 10 may have a polygonal shape having a predetermined thickness in the axial direction of the drum core 10. Further, the number of the terminal electrodes 40 and the claw portions 43a is not limited to the number of the present embodiment, and may be two or more. The ring core 30 has a square shape whose outer shape has a predetermined thickness in the direction of the axis Z, but is not limited to a square shape.

  The coil component of the present invention is extremely useful in the field of coil components that include a drum core and an outer peripheral core and in which a gap is formed between the drum core and the outer peripheral core.

It is a figure which shows the coil components by this Embodiment, (a) is a top view, (b) is sectional drawing. The side view which shows the coil components by this Embodiment. It is a figure which shows the terminal fitting of the coil components by this Embodiment, (a) is a top view, (b) is the figure seen from the right side of (a) toward the left side, (c) is the bottom of (a) The figure seen from the side toward the upper side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coil component 10 Drum core 11 Core part 12 Upper collar part 13 Lower collar part 20 Conductor 30 Ring core 32 Inner peripheral surface 36 C chamfering part 40 Terminal electrode 44 Electrode connection part 43a Claw part 43c Bending part 43d One edge 43e The other Edge of

Claims (7)

A drum core comprising a pair of collars and a core that connects the pair of collars to each other;
A conducting wire wound around the core of the drum core;
An outer peripheral core that is configured separately from the drum core, and has an inner surface that is disposed to face the peripheral surface of the flange portion of the drum core with a predetermined gap therebetween;
A substantially plate-like terminal fitting provided at least two on the outer core and connected to one end or the other end of the conducting wire electrically connected;
At least one of the terminal fittings has at least two claw portions arranged at positions separated from each other,
Tip-sided portion of the at least two claw portions are bent with respect to the base end side of the portion of the claw portion along substantially the inner surface of the outer circumferential core is engaged with the inner surface of the outer circumferential core, the claw The portion of the portion near the tip can contact the peripheral surface of the flange portion of the drum type core,
The claw portion is bent so that portions of the at least two claw portions near the tip end are spread away from each other in a substantially circumferential direction of the drum core toward the tip end of the claw portion. Coil parts.   A portion of a boundary line between the proximal portion and the distal portion defined by bending a portion near the distal end of the claw portion with respect to a portion near the proximal end of the claw portion is defined by the claw. Forming a bent portion connecting one edge in the width direction of the portion and the other edge, and the portion of the bent portion at one edge in the width direction of the claw portion contacts the inner peripheral surface of the outer peripheral core. 2. The coil component according to claim 1, wherein a portion of the bent portion at the other end edge in the width direction of the claw portion is separated from an inner peripheral surface of the outer peripheral core.   2. The coil component according to claim 1, wherein each of the flange portions has a substantially disk shape.   2. The coil component according to claim 1, wherein the conducting wire is connected to a portion of the terminal fitting other than the claw portion. The outer circumferential core includes a ring core provided so as to wrap around the drum core, and the ring core has a polygonal shape having a predetermined thickness in the axial direction of the core portion of the drum core, and at least the polygonal shape. One corner has a chamfered portion that is chamfered, and a portion of the terminal fitting is disposed on the chamfered portion.
5. The coil component according to claim 4, wherein the conducting wire is connected to a portion of the terminal fitting disposed on the chamfered portion.   2. The coil component according to claim 1, wherein the claw portion before being bent has a square developed shape.   The coil component according to claim 1, wherein a portion of the claw portion near the tip is bent at an acute angle with respect to a portion of the claw portion near the base end.

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