JP4844843B2 - Coil parts - Google Patents

Description

  The present invention relates to a coil component.

  Conventionally, coil components used for common mode filters and the like are known. And this coil component is wound around the core part which has a core part and the collar part provided at the both ends, the electrode provided in each collar part of the core, and the core part. Both ends are each configured to have a conducting wire connected to an electrode. In some cases, two conductive wires are wound around the winding core portion. In this case, the end portions of the respective conductive wires are connected to and electrically connected to the respective electrodes on the upper surface of the flange portion.

  The eaves portion has a rectangular shape, and the upper surface of the eaves portion and the side surface of the eaves portion are usually formed at right angles. Therefore, in order for the end part of the conducting wire drawn out from the core part to be positioned on the upper surface of the flange part, the drawn-out lead wire is bent at the boundary between the side surface of the flange part and the upper surface of the flange part. And, since the bending of the conductive wire in this way also leads to the damage of the conductive wire or the fact that it is not stably arranged, there have been several methods for avoiding such disadvantages so far. Has been adopted.

For example, in the invention described in Patent Literature 1 below, an inclined surface that is inclined along the axial direction of the core portion is provided across the upper surface of the flange portion and the side surface of the flange portion, and the conductor is disposed on the inclined surface. A possible arrangement is disclosed. According to such a configuration, it is possible to avoid bending at least at the boundary between the side surface of the buttocks and the top surface of the buttocks.
Japanese Patent Laid-Open No. 2003-77730

  However, even with such a configuration in which the inclined surface is provided, the inconvenience that the drawn lead wire is bent at a somewhat steep angle has not been solved. That is, even if the inconvenience of bending at the boundary between the upper surface of the buttock and the side surface of the buttock is eliminated, there is a corner at the boundary between the inclined surface and the side surface of the buttock. Therefore, the inconvenience that the lead wire is bent at a steep angle at the corner still remains, and in the state where the lead wire is bent at such a steep angle, the drawn lead wire is held in an unstable state. It will be.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a coil component in which a drawn lead wire is not bent at a steep angle, is less likely to be damaged, and is stably held.

In order to achieve the above object, the present invention provides a drum type core having a core part and flanges provided at both ends in the axial direction of the core part, and one surface and one surface of each of the flange parts. A pair of first metal terminal and second metal terminal provided across the opposing other surface, a winding portion wound around the core portion, and one end and the other end of the first metal terminal and the second metal terminal A wire portion electrically connected to the two-metal terminal, and two conductors including the winding portion and a lead portion between the wire portions, the wire portion being on the one surface The first metal terminal portion and the second metal terminal portion on the one surface are provided at a boundary portion between the winding portion and the lead portion rather than the first metal terminal. was located far from the winding core side of the side surface of the collar portion, the axis of the winding core portion extending from the boundary portion up to the inclined said second metal terminal toward a portion of the second metal terminal An inclined surface formed by parallel flat surfaces countercurrent, the cited fat is on the inclined surface is Ri Do straight when viewed from the one surface perpendicular direction, the winding core portion perpendicular to the axial direction a cross-section has a substantially square shape, the beginning of the inclined surface is providing coil component that is located on one of the near corner of the winding core.

A pair of first metal terminals and second metal terminals provided across one surface of each of the flange portions and the other surface facing the one surface, a winding portion wound around the core portion, and one end Two conducting wires each having a connecting portion electrically connected to the first metal terminal and the second metal terminal at the other end, and a lead portion between the winding portion and the connecting portion. The connecting portion is provided at a portion of the first metal terminal on the one surface and a portion of the second metal terminal on the one surface, and the second metal terminal is more than the first metal terminal. It is located far from the boundary portion between the winding portion and the lead-out portion, and the side surface of the flange portion on the side of the winding core portion has an inclined surface that is inclined from the boundary portion toward the portion of the second metal terminal. However, since the lead-out portion is linear on the inclined surface as viewed from the direction perpendicular to the one surface, the lead-out lead wire is less likely to be damaged without bending at a steep angle. , Drawn-out portion is stably held. In addition, the core part has a substantially square cross section perpendicular to the axial direction, and since the start end of the inclined surface is located near one corner of the core part, the drawer becomes smoother and the drawer part becomes more It will be held stably.

  The inclined surface has a first inclined surface located on the boundary portion side and a second inclined surface located on the connecting portion side following the first inclined surface, It is preferable that the inclination angle is smaller than the inclination angle of the first inclined surface.

  The inclined surface has a first inclined surface located on the boundary portion side and a second inclined surface located on the connecting portion side following the first inclined surface, and the inclination angle of the second inclined surface is the first inclined surface. Therefore, it is possible to prevent the conductor from being bent suddenly at the connection position between the inclined surface and one surface.

  Moreover, it is preferable that a substantially rectangular plate-like core is placed on the one surface of each of the flange portions so as to cover the core portion.

  Since a substantially rectangular plate-like core is placed on the one surface of each of the flange portions so as to cover the core portion, the conductor is damaged by protecting the connecting portion. Can be prevented.

  Moreover, it is preferable that the recessed part for preventing a contact with this conducting wire is formed in the surface of the plate-shaped core facing this winding core part.

  Since the concave portion for preventing contact with the conductive wire is formed on the surface of the plate-shaped core facing the winding core portion, the conductive wire can be retracted into the concave portion, thereby preventing contact between the conductive wire and the plate-shaped core. be able to.

  Further, the plate-like core is provided with a convex portion, the flange portion is provided with a position restricting portion, and when the plate-like core is placed on the one surface of the flange portion, the convex portion Is preferably related to the position restricting portion.

  The plate-like core is provided with a convex portion, the flange portion is provided with a position restricting portion, and when the plate-like core is placed on the one surface of the flange portion, the convex portion is positioned at the position. Since it is related to the restricting portion, the position of the plate-like core is restricted and stabilized with respect to the drum type core, and contact between the conductive wire and the plate-like core can be prevented.

  As described above, the present invention can provide a coil component that is not stably bent at a steep angle, is less likely to be damaged, and is stably held.

  A coil component according to an embodiment of the present invention will be described with reference to FIGS. It is assumed that the coil component of the present invention is used for in-vehicle use, for example. As shown in FIG. 1, the coil component 1 includes a drum-type core 2 and a plate-like core 20 that is placed on the drum-type core 2 so as to cover the core portion.

  The drum-type core 2 includes a core portion 3 having a substantially rectangular cross section perpendicular to the longitudinal direction, and flanges 4 and 4 that are provided at both ends in the longitudinal direction of the core portion 3 and have substantially the same shape. Yes. Two conducting wires 7 and 8 are wound around the core portion 3. Hereinafter, since the flanges 4 positioned on both sides of the drum type core 2 have the same shape, only one side will be described unless otherwise specified. The longitudinal direction of the core part 3 is defined as the x-axis direction, the width direction of the core part 3 is defined as the y-axis direction, and the direction orthogonal to the x-axis direction and the y-axis direction is defined as the z-axis direction. In FIGS. 3 and 7, the conductive wires 7 and 8 are not shown for convenience of explanation.

  The pair of flange portions 4 are provided integrally with the core portion 3 at both ends of the core portion 3 in the X-axis direction. The axis of the core part 3 is arranged eccentrically closer to the plate core 20 than the center of the flange part 4 in the z-axis direction. The collar portion 4 has a substantially rectangular parallelepiped shape and has six surfaces 4A to 4F. The top surface 4A and the bottom surface 4B face each other in the Z-axis direction. The first side surface 4C and the second side surface 4D face each other in the Y-axis direction. Further, the outer end surface 4E and the first restriction surface 4F are opposed to each other in the X-axis direction. Moreover, the collar part 4 has the below-mentioned inclined surface 9 and the inclined surface 10 in the 1st regulation surface 4F side.

  The first restriction surface 4F is a surface located on the core part 3 side. When the plate-like core 20 is placed on the drum type core 2 and the plate-like core 20 is about to be moved in the x-axis direction, the first regulating surface 4F comes into contact with a first convex portion 21 described later. This serves to regulate the movement of the plate-shaped core 20 in the x-axis direction.

  The top surface 4A is a surface on which the plate-like core 20 is placed, and includes two types of top surfaces, a first top surface 4A-1 and a second top surface 4A-2. The two first top surfaces 4A-1 are respectively located on the first side surface 4C and the second side surface 4D side in the y-axis direction, and the second top surface 4A-2 is two first top surfaces 4A-1. Located between. The first top surface 4A-1 is located closer to the bottom surface 4B side in the z-axis direction than the second top surface 4A-2. Therefore, the collar part 4 has a structure in which the peripheral part of the second top face 4A-2, which is near the center part of the top face 4A, has a convex portion that protrudes relatively to the plate core 20 side. Therefore, the description will be continued below assuming that the convex portion having the top surface 4A-2 is the convex portion 4G.

  The convex part 4G has a three-dimensional structure in which the cross section cut along the xz plane is substantially rectangular, and the cross section cut along the yz plane is substantially trapezoidal. For this reason, the second regulating surface 4a and the top surface 4A (first surface) composed of a pair of inclined surfaces located on the outer side (the first side surface 4C side or the second side surface 4D side of the flange portion 4) of the convex portion 4G. The first top surface 4A-1 and the second top surface 4A-2) are each configured to form an obtuse angle. The second restricting surface 4a comes into contact with a second convex portion 22 described later when the plate-like core 20 is placed and the plate-like core 20 is about to be moved in the y-axis direction. It plays a role of regulating the movement of the cylindrical core 20 in the y-axis direction.

  A concave portion 4H is formed between the first metal terminal 5 and the second metal terminal 6 which will be described later, as shown in the figure, at the center position of the bottom surface 4B of the flange portion 4 in the y-axis direction. When the coil component 1 is mounted on the substrate, a conductive paste may be used. In this case, a short circuit is caused between a plurality of metal terminals provided on one collar by a metal dendrid generated by ion migration. Cheap. However, since the recess 4H is formed, it is possible to prevent occurrence of a short circuit between the first metal terminal 5 and the second metal terminal 6.

  The first metal terminal 5 and the second metal terminal 6 are respectively baked in a strip shape from the top surface 4A-2 of the convex portion 4G to the bottom surface 4B and the outer end surface 4E, and Ni plating is applied thereon. Further, Au plating is provided thereon.

  Here, the conducting wires 7 and 8 electrically connected to the first metal terminal 5 and the second metal terminal 6 will be described. The conducting wires 7 and 8 are formed on the conducting wire 7 that is wound over substantially the entire core portion 3 after the conducting wire 7 is wound over the entire entire core portion 3 and then over substantially the entire core portion 3. The conductor 8 has a two-layer bifilar structure wound around the core portion 3. The conducting wire 7 is made of, for example, an insulating coated copper wire that is a conducting wire having a surrounding insulation coating, and includes a winding portion 7a, a connecting portion 7b, and a lead portion 7c. The winding part 7 a corresponds to a part wound around the core part 3 from the one collar part 4 toward the other collar part 4. Further, one end of the conducting wire 7 extends from one end of the winding portion 7a (hereinafter referred to as “boundary portion 7d”), on the top surface 4A-2 of the convex portion 4G of one flange portion 4 and an inclined surface 9 described later. It is electrically connected by ultrasonic bonding to the second metal terminal 6 located on the far side from the boundary portion 7d and connected to form a connecting portion 7b. The lead portion 7c corresponds to a portion located between the boundary portion 7d and the connecting portion 7b. Further, the other end of the conducting wire 7 extends from the other end of the winding portion 7a (hereinafter referred to as “boundary portion 7d”), on the top surface 4A-2 of the convex portion 4G of the other flange portion 4 and an inclination described later. The first metal terminal 5 located on the surface 10 on the side closer to the boundary portion 7d is electrically joined and connected by ultrasonic joining to constitute the connecting portion 7b. The lead portion 7c corresponds to a portion located between the boundary portion 7d and the connecting portion 7b.

  Similarly to the conductive wire 7, the conductive wire 8 wound around the conductive wire 7 is made of, for example, an insulating coated copper wire that is a conductive wire having an insulation coating around the conductive wire 7, and includes a winding portion 8a, a connecting portion 8b, and a lead portion 8c. It is comprised. The winding portion 8 a corresponds to a portion wound around the winding core portion 3 from the one flange portion 4 toward the other flange portion 4. Further, one end of the conducting wire 8 extends from one end of the winding portion 8a (hereinafter referred to as “boundary portion 8d”), on the top surface 4A-2 of the convex portion 4G of the other flange portion 4 and an inclined surface 9 described later. It is electrically connected by ultrasonic bonding to the second metal terminal 6 located on the far side from the boundary portion 8d and connected to form a connecting portion 8b. The lead portion 8c corresponds to a portion located between the boundary portion 8d and the connecting portion 8b. Further, the other end of the conducting wire 8 extends from the other end of the winding portion 8a (hereinafter referred to as “boundary portion 8d”), on the top surface 4A-2 of the convex portion 4G of one flange portion 4 and an inclination described later. The first metal terminal 5 located on the surface 10 and on the side closer to the boundary portion 8d is electrically joined by ultrasonic joining and connected to form a connecting portion 8b. The lead portion 8c corresponds to a portion located between the boundary portion 8d and the connecting portion 8b.

  As shown in FIG. 1 or FIG. 3, the inclined surface 9 is substantially at the center position of the flange portion 4 in the y-axis direction so as to be inclined from the first regulating surface 4F of the flange portion 4 toward the top surface 4A-2. And it is formed between the core part 3 and the top surface 4A-2. The inclined surfaces 9 each have a triangular shape when viewed from a direction perpendicular to the top surface 4A and the first regulating surface 4F. The inclined surface 9 gradually extends in the z-axis direction so as to connect the portion of the first regulating surface 4F near the boundary portion 7d in the y-axis direction and the portion of the top surface 4A-2 on which the metal terminal 6 is provided. It is high. Furthermore, the lead portion 7c at one end of the conducting wire 7 and the lead portion 8c at the other end of the conducting wire 8 are mounted on the inclined surface 9 formed as described above.

  More specifically, the inclined surface 9 is composed of two types of inclined surfaces, a first inclined surface 9a and a second inclined surface 9b having different angles. The first inclined surface 9a is a portion near the boundary portions 7d and 8d, and the second inclined surface 9b is a portion near the connecting portions 7b and 8b. The angle formed between the top surface 4A and the first inclined surface 9a is larger than the angle formed between the top surface 4A and the second inclined surface 9b. By doing in this way, the lead | wires 7 and 8 will be drawn more stably by the angle which the drawer | drawing-out parts 7c and 8c near the connection parts 7b and 8b bend becomes small.

  For example, in the coil component in which the inclined surface is not provided in the flange portion and the lead wire is arranged to extend from the surface connected to the winding core portion to the top surface in the flange portion as in the past, The conducting wire was bent at the boundary with the surface connected to the core. On the other hand, a coil component is manufactured in which an inclined surface is provided on the flange portion in a direction along the core axis (corresponding to the x-axis direction). In this case, the coil component is connected to the core portion. For the time being, the shortcomings of bending the conductor from the top to the top were avoided. However, the metal terminal to which the connecting portion of the conducting wire is connected is disposed at a position far from the boundary portion of the conducting wire in a direction that forms a predetermined angle with the extending direction of the core portion (corresponding to the X-axis direction). In this case, the lead wire is bent at a steep angle at the end of the inclined surface on the winding core side. That is, even if an inclined surface is provided, a state in which the conducting wire bends inevitably occurs at the boundary between the inclined surface and the surface connected to the core portion. Such a state also leads to damage to the conductor, leaving room for improvement.

  On the other hand, in the coil component 1, the above inconveniences are eliminated. That is, the inclined surface 9 is inclined along the y-axis direction, and the conductors 7 and 8 are placed on the inclined surface 9 inclined in this way. Therefore, even if it is a case where it sees from the direction perpendicular | vertical to 4 A of top surfaces, and the 1st control surface 4F, it turns out that the conducting wire 7 and the conducting wire 8 which are located in the drawer | drawing-out part 7c are substantially linear form. That is, since the conductor does not bend at a steep angle at the boundary between the inclined surface 9 and the surface connected to the core portion (the first regulating surface 4F) as in the past, smooth drawing is executed. be able to. In particular, the inclined surface 9 in the coil component 1 has one end located in the vicinity of the boundary portion 7d and the other end located in the vicinity of the connecting portion 7b. Therefore, since a smoother drawer can be realized by simply providing the inclined surface on the collar portion 4, damage and the like are less likely to occur. Furthermore, since the lead-out part 7c and the lead-out part 8c are placed on the inclined surface 9, and the lead-out part 7c and the lead-out part 8c are linear when viewed from the direction perpendicular to the top surface 4A, the lead wires 7 and 8 It is possible to prevent an increase in the separation distance.

  As shown in FIG. 1 or FIG. 3, the inclined surface 10 is inclined from the first regulating surface 4F of the flange portion 4 toward the first metal terminal 5 on the top surface 4A-2 of the convex portion 4G. It is formed at the position of the convex portion 4G in the y-axis direction. The inclined surface 10 has a rectangular shape when viewed from a direction perpendicular to the top surface 4A and the side surface 4F. The inclined surface 10 gradually increases in the z-axis direction so as to connect the first regulating surface 4F and the surface of the first metal terminal 5 on the top surface 4A-2 of the convex portion 4G in the x-axis direction. Furthermore, the lead portion 7c at one end of the conducting wire 7 and the lead portion 8c at the other end of the conducting wire 8 are placed on the inclined surface 10 formed in this way.

  Next, the plate core 20 placed on the drum type core 2 will be described with reference to FIG. 1 and FIGS. FIG. 4 is a view of the plate core 20 as viewed from the drum type core 2 side in the z-axis direction. 5 is a cross-sectional view taken along the line VV in FIG. 4, and FIG. 6 is a side view of the plate-like core 20 viewed from the x-axis direction. The plate-like core 20 has a substantially rectangular outer shape, and has a first side 20a and a second side 20b, a third side 20c and a fourth side 20d. The first side 20a and the second side 20b each extend in the x-axis direction, and the length thereof is equal to or shorter than the length between the outer end surfaces 4E and 4E of the flange portion 4. The third side 20c and the fourth side 20d each extend in the y-axis direction, and the length thereof is equal to or shorter than the length of the entire top surface 4A of the flange portion 4 in the y-axis direction.

  As shown in FIG. 4, the plate-like core 20 includes a first convex portion 21, a second convex portion 22, a third convex portion 23, and a fourth convex portion 24. The first protrusions 21 are provided so as to protrude from the first side 20a and the second side 20b to the drum type core 2 side, respectively. The length of the first convex portion 21 in the x-axis direction is substantially the same as the length of the core portion 3 in the axial direction (x-axis direction), and the width of the first convex portion 21 in the y-axis direction (to the center side). Is a relatively thick width, for example, approximately 1/6 of the length of the third side 20c or the fourth side 20d. When the plate-shaped core 20 is placed on the drum type core 2 and is about to be moved in the x-axis direction, the end surface in the x-axis direction of the first convex portion 21 comes into contact with the first regulating surface 4F.

  The second convex portions 22 are provided at the four corners of the plate-like core 20 so as to protrude toward the drum type core 2. Further, as shown in FIG. 6, the surfaces of the second convex portion 22 on the third convex portion 23 side each form an inclined surface 22a, and spread toward each other in the direction of the drum type core 2, that is, downward in FIG. Abbreviated C-shape. More specifically, the angle formed by the inclined surface 22a, the third side 20c, and the fourth side 20d is an obtuse angle. And the 2nd convex part 22 has a magnitude | size which can contact the inclined surface 22a and the 2nd control surface 4a in the y-axis direction, when the plate-shaped core 20 is mounted on the drum type core 2. As shown in FIG. . Further, the surface on the drum type core 2 side of the second convex portion 22 forms a protruding end surface 22b.

  As shown in FIGS. 4 and 5, the third convex portion 23 is provided in the vicinity of the center portion of the third side 20 c and the fourth side 20 d so as to protrude toward the drum type core 2. Further, the surface of the third convex portion 23 on the drum type core 2 side forms a protruding end surface 23a. The 4th convex part 24 is located in the center part of the plate-shaped core 20, and plays the role which increases the thickness of the plate-shaped core 20 and raises rigidity. And the recessed part 25 relatively depressed with respect to the 1st convex part 21 and the 2nd convex part 22 is formed in the surface at the side of the drum type core 2 of the plate-shaped core 20 as FIG. Yes. The recess 25 is formed so that the conductive wire 7 and the conductive wire 8 do not come into contact with the plate-shaped core 20 as will be described later when the plate-shaped core 20 is placed on the drum type core 2.

  And the coil component 1 is comprised when the plate-shaped core 20 demonstrated above is mounted on the drum type core 2 demonstrated previously, and becomes integral. Regarding such a coil component 1, FIG. 7 shows a view in the y-axis direction, and FIG. 8 shows a view in the x-axis direction.

  As shown in FIG. 7, when the plate-shaped core 20 is placed on the drum type core 2, there is a slight gap between the both end surfaces of the first convex portion 21 in the x-axis direction and the first regulating surface 4 </ b> F. When a gap is formed and the plate-shaped core 20 is about to be moved in the x-axis direction with respect to the drum type core 2, both end surfaces of the first convex portion 21 in the x-axis direction and the first regulating surface 4 </ b> F are It comes into contact, and movement in the x-axis direction is restricted. That is, since the first convex portion 21 having a considerable length in the x-axis direction is provided on the plate-shaped core 20 itself, the first convex portion 21 is formed without increasing the outer dimension of the coil component 1. It can be set as the structure which is hard to be damaged and has structural stability.

  Further, as shown in FIG. 8, when the plate-shaped core 20 is placed on the drum type core 2, a slight gap is formed between the inclined surface 22a of the second convex portion 22 and the second regulating surface 4a. When the plate-shaped core 20 is about to be moved in the y-axis direction with respect to the drum type core 2, the inclined surface 22a of the second convex portion 22 and the second regulating surface 4a come into contact with each other, and y The movement in the axial direction is restricted. Further, the protruding end surface 23a comes into contact with the top surface 4A-2 via the adhesive, and the movement in the z-axis direction is restricted. As shown in FIG. 8, the angle formed by the inclined surface 22a of the second convex portion 22 and the third side 20c and the fourth side 20d is an obtuse angle, and the angle formed by the second regulating surface 4a and the top surface 4A is an obtuse angle. The inclined surface 22a and the second regulating surface 4a are inclined so as to spread in a substantially C shape toward the first side surface 4C and the second side surface 4D, so that the plate-like core 20 is inclined. Even when it is placed shifted in the y-axis direction, it moves smoothly and settles in a stable position. Therefore, the corners formed by the second regulating surface 4a and the top surface 4A of the drum type core 2 and the corners formed by the inclined surface 22a of the plate-shaped core 20 and the third side 20c and the fourth side 20d collide with each other and are damaged. Such a possibility can be reduced. In addition, since the concave portion 25 is formed, the plate-like core 20 is brought into direct contact with the lead wire 7, the lead portion 7c of the lead wire 8, the lead portion 8c or the joint portion 7b, and the joint portion 8b. Damage to the conductor 7 and the conductor 8, the conductor 8, or the connecting portion 7b and the connecting portion 8b are protected.

  The coil component 1 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, in the present embodiment, as shown in FIG. 4, the place between the two first convex portions 21 and the fourth convex portion 24 located at the center of the plate-like core 20 is along the x-axis direction. Although the concave portion 25 is formed, the fourth convex portion 124 may be provided between the first convex portions 21 and 21 as shown in FIG. By doing in this way, the rigidity of the plate-shaped core 20 can further be raised. Even in this case, the recess 25 remains formed, and it is avoided that the plate-like core 120 causes damage due to direct contact with the conducting wire 7, the conducting wire 8, or the connecting portion 7b, and the connecting portion 8b. .

  Further, in the present embodiment, the cross section perpendicular to the longitudinal direction of the core part 3 is substantially rectangular, but is not limited to such a shape, for example, the cross section perpendicular to the longitudinal direction of the core part 3 is It may be substantially circular. In this case, a portion where the conducting wire 7 and the conducting wire 8 are separated from the winding core portion 3 in the tangential direction may be the boundary portion 7d.

  Further, in the present embodiment, the movement in the Z-axis direction is fixed when the protruding end surface 23a of the third convex portion 23 comes into contact with the top surface 4A-2, but for example, instead of the protruding end surface 23a. You may make it the protrusion end surface 22b of the 2nd convex part 22 contact | abut on top surface 4A-1. The protruding end surface 22b of the second convex portion 22 may be in contact with the top surface 4A-1, and the protruding end surface 23a of the third convex portion 23 may be in contact with the top surface 4A-2. In this case, the movement in the z-axis direction is further stably fixed.

  Further, in the present embodiment, the protruding end surface 23a of the third convex portion 23 is fixed to the top surface 4A-2 by an adhesive, but the protruding end surface 22b of the second convex portion 22 is further fixed to the top surface 4A by an adhesive. It may be fixed to -1. By doing so, the plate-shaped core 20 is more firmly fixed to the drum type core 2.

  In the present embodiment, the inclined surface 9 is composed of two types of inclined surfaces, the first inclined surface 9a and the second inclined surface 9b, but the inclined surface 9 is composed of one type of inclined surface. Also good.

  Although the outermost surfaces of the first metal terminal 5 and the second metal terminal 6 are subjected to Au plating so as to be compatible with the conductive paste, the outermost surface is replaced with Au plating instead of the Pt plating. , Ag plating, Pd plating may be applied. Moreover, although the 1st metal terminal 5 and the 2nd metal terminal 6 decided to be comprised by baking and plating, it may replace with this and may be comprised with the metal fitting. However, even in that case, the outer surface is preferably subjected to Au plating.

Moreover, in this Embodiment, although the two conducting wires 7 and 8 were wound by the core part 3, the number of conducting wires is not restricted to two. In this case, the number of metal terminals corresponding to the number of conductive wires is provided. Moreover, in this Embodiment, although the conducting wire 7 and the conducting wire 8 were electrically joined to the 1st metal terminal 5 and the 2nd metal terminal 6 by ultrasonic bonding, they were connected, but ultrasonic bonding Instead, it may be connected by thermocompression bonding, soldering, laser welding, or arc welding.
Moreover, although the axial center of the winding core part 3 is eccentrically arranged closer to the plate-like core 20 than the center of the flange part 4 in the z-axis direction, it does not have to be eccentric.

The disassembled perspective view of the coil components which concern on embodiment of this invention. The top view of the drum type core of the coil components which concerns on embodiment of this invention. Sectional drawing of the drum type core along the III-III line of FIG. The bottom view of the plate-shaped core which concerns on embodiment of this invention. Sectional drawing along the VV line | wire of FIG. The front view of the plate-shaped core which concerns on embodiment of this invention. The side view which shows a mode that the plate-shaped core was combined with the drum type core of the coil components which concern on embodiment of this invention. The front view which shows a mode that the plate-shaped core was combined with the drum type core of the coil components which concern on embodiment of this invention. The bottom view of the plate-shaped core which concerns on the modification of embodiment of this invention.

Explanation of symbols

1 ... Coil parts,
2 ... Drum type core,
3 ... core part,
4 ... Buttocks,
4A ... top,
4A-1, first top surface 4A-2, second top surface 4B, bottom surface,
4C ... 1st side surface,
4D ... the second side,
4E ... outer end surface,
4F ... The first regulatory aspect,
4G ... convex part,
4H ... recess,
4a ... second regulatory aspect,
5 ... 1st metal terminal,
5a ... upper end surface,
6 ... second metal terminal,
7, 8 ... Lead wire,
7a, 8a ... winding part,
7b, 8b ... connecting part,
7c, 8c ... drawer part,
7d, 8d ... boundary,
9 ... Inclined surface,
9a ... first inclined surface,
9b ... the second inclined surface,
10 ... inclined surface,
20, 120 ... plate-shaped core,
20a ... first side,
20b ... the second side,
20c ... the third side,
20d ... 4th side,
21 ... 1st convex part,
22 ... 2nd convex part,
22a ... inclined surface,
22b ... protruding end surface,
23. Third convex part,
23a ... protruding end surface,
24, 124 ... fourth convex part,
25 ... concave,

Claims (5)

A drum type core having a winding core part and flanges provided at both ends in the axial direction of the winding core part;
A first metal terminal and a second metal terminal provided as a pair across one surface of each of the flanges and the other surface facing the one surface;
A winding portion wound around the winding core portion, a connecting portion in which one end and the other end are electrically connected to the first metal terminal and the second metal terminal, and the winding portion and the connecting portion Two lead wires each having a lead portion between the two portions, and the connecting portion is provided at a portion of the first metal terminal on the one surface and a portion of the second metal terminal on the one surface. ,
The second metal terminal is located farther from the boundary between the winding part and the lead-out part than the first metal terminal,
The side surface of the flange portion on the core portion side is a flat surface that is inclined from the boundary portion toward the second metal terminal and extends to the second metal terminal and is parallel to the axial direction of the core portion. an inclined surface formed by, the cited fat is in the inclined surface, Ri Do straight when viewed from the one surface perpendicular direction,
Take-core has a substantially square shape is a cross-section perpendicular to the axial direction, a coil component beginning of the inclined surface is characterized that you have located on one corner near the take-core.   The inclined surface has a first inclined surface located on the boundary portion side and a second inclined surface located on the connecting portion side following the first inclined surface, and an inclination angle of the second inclined surface The coil component according to claim 1, wherein is smaller than an inclination angle of the first inclined surface.   2. The coil component according to claim 1, wherein a substantially square plate-like core is placed on the one surface of each of the flange portions so as to cover the core portion. 4. The coil component according to claim 3, wherein a concave portion for preventing contact with the conductive wire is provided on a surface of the plate-shaped core facing the core portion. The plate-like core is provided with a convex portion, the collar portion is provided with a position restricting portion, and when the plate-shaped core is placed on the one surface of the collar portion, the convex portion is The coil component according to claim 3, wherein the coil component is related to a position regulating portion.

Images