JP2009231547A - Relay line structure for electronic components - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relay line structure for electronic components for improving reliability even for a relay line structure by ultrasonic bonding. <P>SOLUTION: Wires 7 and 8 are wound to a winding core 3 so as to have a two-layer bifilar structure where the wire 7 is wound to almost whole of the winding core 3 and further the wire 8 is wound to almost whole of the winding core 3 on the wire 7 wound to almost whole of the winding core 3. The wires 7 and 8 are insulating coat wires which consist of a core wire, and an insulating coat that carries out insulating coating around the core wire. The wire 7 is configured so as to have a winding part 7a, a relay line part 7b, and a lead part 7c. In addition, both ends of the wire 7 are electrically joined and relayed to a first metal terminal 5 and a second metal terminal 6 by ultrasonic bonding while excluding the insulating coat to configure the relay line part 7b. The lead part 7c consists of an insulating coat peeling part 7c1 which exists on a side following the relay line part 7b and at which the core wire is exposed, and an insulating coat part which exists on a side following a boundary part 7d and at which the insulating coat is coated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a connection structure for an electronic component.

2. Description of the Related Art Conventionally, a connection structure for connecting a terminal electrode and a terminal of a conductive wire is known as a connection structure for an electronic component such as a coil component. As a method of connecting the terminal electrode and the terminal of the conductive wire, bonding by ultrasonic bonding (diffusion fixation or fusion) is known in addition to solder connection, thermocompression bonding, and welding connection (for example, Patent Document 1). For example, when the conducting wire is a highly heat-resistant insulated wire such as a polyamide-imide copper wire, in order to connect the terminal electrode and the end of the conducting wire by solder connection, thermocompression bonding, or welding connection, the end of the conducting wire in advance It is necessary to peel off the insulation coating. On the other hand, when joining the lead wire and the terminal electrode by ultrasonic joining, even if the lead wire is a lead wire with insulation coating having high heat resistance such as polyamide imide, the insulation coating is formed between the lead wire and the terminal electrode by ultrasonic vibration. It is considered that it is not necessary to peel off the insulation coating from the end of the conducting wire because it can escape to the outside of the joint surface. Specifically, in ultrasonic bonding, energy of ultrasonic vibration is applied to a terminal electrode and a terminal of a conductive wire while applying pressure using a horn and an anvil, so that the terminal electrode and the terminal of the conductive wire are placed between the terminal electrode and the terminal of the conductive wire. It is believed that the existing insulation coating can be extruded out of the joint surface.
JP-A-9-153419

  However, even when the terminal electrode and the end of the conducting wire are joined by ultrasonic joining, when the diameter of the core wire of the coated conducting wire is small (in the experiment, the diameter of the core wire is less than 0.35 mm) Because the upper limit of the pressure that can be applied to the end of the lead wire and the terminal electrode by the horn and the anvil is less than the pressure required to extrude the insulation coating to the outside of the joint surface, the joint between the terminal electrode and the lead wire There was a problem that the insulation coating remained on the surface, resulting in poor connection.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a connection structure for an electronic component that improves reliability even with a connection structure by ultrasonic bonding.

  In order to achieve the above-mentioned object, the present invention provides a conductor wire comprising a conductor wire placement portion, a conductor wire disposed in the wire wire placement portion, and comprising a core wire and an insulating coating covering the peripheral surface of the core wire, and an end portion of the wire wire placement portion. And an electrode part electrically connected by ultrasonic bonding in a state in which both end portions of the conducting wire exclude the insulating coating, and the conducting wire extends from the conducting wire arranging part to the electrode part. And a connecting portion electrically connected to the electrode portion, and at least a part of the lead portion which is continuous with the connecting portion has an insulating coating peeling portion where the core wire is exposed. The present invention provides a connecting structure for electronic parts characterized by the following.

  According to such a connecting structure of an electronic component, both end portions of the conducting wire are electrically connected to the electrode portion by ultrasonic bonding in a state excluding the insulating coating, and continuous with the connecting portion of the lead-out portion. Since at least a part of the side forms an insulating coating peeling portion where the core wire is exposed, even when a lead wire having a small core wire diameter is connected to the electrode portion by ultrasonic bonding, the electrode portion and the connecting portion Thus, the insulating coating is not left on the bonding surface of the electrodes, and the electrode portion and the conductive wire can be connected well. That is, even when the diameter of the core wire of the conducting wire is small, the connection by ultrasonic bonding can be realized. Furthermore, since ultrasonic bonding is started in a state where there is no gap between the electrode portion and the connecting portion, good bonding can be performed. In addition, since the insulation coating is removed in the vicinity of the connecting portion of the lead portion of the conducting wire, the lead wire can be routed flexibly, and the lead portion is prevented from expanding due to the insulating coating in the vicinity of the connecting portion. it can.

  Moreover, it is preferable that the cross-sectional shape and cross-sectional area of the said core wire of this insulation coating peeling part are the same as the cross-sectional shape and cross-sectional area of this core wire of this conducting wire arrange | positioned at this conductor arrangement | positioning part.

  Moreover, it is preferable that the surface state of the core wire of the insulating coating peeling portion is the same as the surface state of the conductive wire disposed in the conductor placement portion.

  According to such a connection structure of an electronic component, the cross-sectional shape, cross-sectional area, and surface state of the core wire of the insulating coating peeling portion are the cross-sectional shape, cross-sectional area, and surface state of the core wire of the conductor arranged in the conductor placement portion. Since they are the same, no stress is applied to a part of the core wire, so that disconnection can be prevented. For example, the core wire between the conductor placement part and the insulation coating peeling part is the same even when the lead part is caught in the manufacturing process or the plate-like core or the mounting substrate is in contact with the lead part, Disconnection due to stress and friction can be prevented.

  Further, it is preferable that the insulating coating has an end surface that defines a boundary between the portion covered with the insulating coating in the lead-out portion and the insulating coating peeling portion, and the surface state of the end surface is flat.

  In general, when the insulation coating of a conductor is peeled off by mechanical peeling, the end surface of the insulation coating, which is the boundary between the portion coated with the insulation coating and the portion where the insulation coating is peeled, is raised and uneven, and the end surface is peeled off. An unpeeled piece of the insulation coating that could not be completed remains. Since the unpeeled piece is peeled off halfway from the core wire of the conducting wire, there is a possibility that the unpeeled piece will be peeled off when not intended by a small impact such as vibration, leaving a foreign substance in the electronic component. On the other hand, according to the connecting structure of the electronic component, it has an end surface of the insulating coating that defines the boundary between the portion coated with the insulating coating and the portion from which the insulating coating has been removed, and the end surface is flat. Therefore, there is no stripped piece of insulating coating on the end face, and it is possible to reliably prevent foreign matter from remaining in the common mode filter 1.

  Moreover, it is preferable to provide the plate-shaped core which opposes this connection part.

  According to the connection structure of such an electronic component, a closed magnetic circuit can be formed. Moreover, a connection part can be protected by a plate-shaped core.

  As described above, the present invention can provide a connection structure for an electronic component with improved reliability even with a connection structure by ultrasonic bonding.

  A coil component having a connection structure for an electronic component according to an embodiment of the present invention will be described with reference to FIGS. The coil component 1 is a common mode filter 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 FIG. 4, 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 positioned on the first side surface 4C and the second side surface 4D side in the y-axis direction, respectively, and the second top surface 4A-2 has 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 (the first surface 4A) are formed of a pair of slopes 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. And when the plate-shaped core 20 is mounted and the plate-shaped core 20 is about to be moved in the y-axis direction, the second regulating surface 4a comes into contact with a second convex portion 22 described later, thereby 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 composed of a core wire and an insulation coating that insulates the periphery of the core wire. For example, a polyamide-imide copper wire having a diameter of about 28 μm to 0.18 mm (the thickness of the insulation coating is 10 μm) including the insulation coating, etc. It is an insulation coated copper wire. The conducting wire 7 includes a winding part 7a, a connecting part 7b, and a lead part 7c. The winding portion 7 a corresponds to a portion of the conductive wire 7 that is wound around the core portion 3 from one flange portion 4 toward the other flange portion 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. The second metal terminal 6 located on the far side from the boundary portion 7d is electrically joined by ultrasonic joining in a state excluding the insulation coating, and is connected to form the connecting portion 7b. Yes. The lead portion 7c corresponds to a portion of the conducting wire 7 that is located between the boundary portion 7d and the connecting portion 7b. The lead portion 7c is a side that is continuous with the connecting portion 7b and the insulating coating is removed and the core wire is exposed, and the lead portion 7c is a side that is continuous with the boundary portion 7d and is covered with the insulating coating. The insulating coating portion 7c2 (see FIG. 2). 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 and on the side closer to the boundary portion 7d is electrically joined by ultrasonic joining in a state excluding the insulating coating, thereby forming the connecting portion 7b. is doing. The lead portion 7c corresponds to a portion located between the boundary portion 7d and the connecting portion 7b. As shown in FIG. 2, the insulating coating peeling portion 7 c 1 is located on the connecting portion 7 b side, and is a portion that occupies about 30 to 50 percent of the lead portion 7 c.

  Similarly to the conductive wire 7, the conductive wire 8 wound outside the conductive wire 7 is also composed of a core wire and an insulating coating that insulates the periphery of the core wire. For example, the diameter including the insulating coating is 28 μm to 0.18 mm. It is an insulation coating copper wire such as a polyamide-imide copper wire (the thickness of the insulation coating is 10 μm). The conducting wire 8 includes a winding part 8a, a connecting part 8b, and a lead part 8c. The winding portion 8 a corresponds to a portion wound around the winding core portion 3 from 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. The second metal terminal 6 located on the far side from the boundary portion 8d is electrically joined by ultrasonic joining in a state excluding the insulation coating, and is connected to form the connecting portion 8b. Yes. The lead portion 8c corresponds to a portion located between the boundary portion 8d and the connecting portion 8b. As shown in FIG. 2, the insulating coating peeling portion 8c1 is located on the connecting portion 8b side and occupies about 30 to 50% of the lead portion 8c. The lead-out portion 8c is an insulating coating peeling portion 8c1 where the core wire is exposed on the side continuous with the connecting portion 8b, and an insulating coating portion 8c2 which is on the side continuous with the boundary portion 8d and covered with the insulating coating. It consists of. 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 closer to the boundary portion 8d is electrically joined by ultrasonic joining in a state excluding the insulation coating, thereby forming the connecting portion 8b. is doing.

  When joining the conducting wires 7 and 8 to the first metal terminal 5 and the second metal terminal 6 by ultrasonic joining, both ends of the conducting wires 7 and 8 (the connecting portions 7b and 8b after the ultrasonic joining) The portions corresponding to the insulating coating peeling portions 7c1 and 8c1 (see FIG. 1) are peeled off by laser. Specifically, both ends of the conducting wires 7 and 8 are irradiated with a laser having a wavelength of about 532 nm to 1064 mm by a YAG laser irradiation apparatus. For example, when a laser having a wavelength that can pass through an insulating coating of about 1064 mm is irradiated, the laser passes through the insulating coating and is absorbed by the core wire, and the interface between the insulating coating and the core wire rises in temperature and thermally expands. The insulation coating is fragmented and scattered. When a laser with a wavelength of about 532 nm is irradiated, the energy of the laser is absorbed by the insulation coating, the surface temperature of the insulation coating rises, the surface of the insulation coating is melted by heat, the inside is heat-transfer melted and evaporated. Or vaporize. In this way, the insulation coating is peeled off at both ends of the conducting wires 7 and 8 and the core wire is exposed. Specifically, when both ends of the conducting wires 7 and 8 are electrically connected to the first metal terminal 5 and the second metal terminal 6, the insulating coating peeling portions 7c1 and 8c1 are 3 of the lead portions 7c and 8c. The insulating coating is peeled off by the laser so as to occupy about 50% of the portion. In addition, when the ratio which the insulation coating peeling parts 7c1 and 8c1 occupy in the drawer | drawing-out parts 7c and 8c is less than 30%, possibility that it will become a connection defect with the 1st metal terminal 5 and the 2nd metal terminal 6 is high. Moreover, when the ratio which the insulation coating peeling parts 7c1 and 8c1 occupy in the drawer parts 7c and 8c is larger than 50%, the first metal terminal 5 and the second metal terminal 6 provided in the same collar part 4 There is a high possibility that a short circuit will occur between the conducting wire 7 and the conducting wire 8 respectively connected. Therefore, when electrically connected to the first metal terminal 5 and the second metal terminal 6, the insulating coating peeling portions 7c1 and 8c1 occupy about 30 to 50% of the lead portions 7c and 8c. It is preferable to peel off the insulating coatings at both ends of the conducting wires 7 and 8.

  FIG. 3A is a photograph of the conductive wires 7 and 8 when the insulating coating is peeled off by the laser described above, and FIG. 3B is a photograph of the conductive wire when the insulating coating is peeled off by general mechanical peeling. . As shown in FIG. 3B, the core wire of the part where the insulation coating is peeled off by mechanical peeling is damaged at the time of peeling, and the core wire of the part where the insulation coating is not peeled is a cross-sectional shape and a cross-sectional area. It can be seen that the surface conditions are different. On the other hand, as shown in FIG. 3A, the conductors 7 and 8 peeled by the laser described above have an insulating coating without damaging the core wire, compared to peeling by mechanical peeling (FIG. 3B). It is made to peel. That is, the cross-sectional shape, cross-sectional area, and surface state of the core wire that has been exposed by peeling off the insulating coating are the same as the cross-sectional shape, cross-sectional area, and surface state of the core wire that is coated with the insulating coating. Therefore, since concentrated stress is not applied to a part of the core wires of the conducting wires 7 and 8, disconnection can be prevented. Specifically, even if the lead portions 7c and 8c are caught in the manufacturing process, or the plate-like core 20 or the mounting substrate is in contact with the lead portions 7c and 8c, the conductors 7 and 8 due to stress or friction are used. Disconnection can be prevented.

  In addition, as shown in FIG. 3B, when the insulation coating of the conductive wire is peeled off by mechanical peeling, the end face of the insulation coating that is the boundary between the portion covered with the insulation coating and the portion where the insulation coating is peeled off As a result, the ridged shape becomes uneven, and the unpeeled pieces of the insulating coating that could not be peeled off remain. Since this unpeeled piece is peeled off halfway from the core wire, it may be peeled off when not intended by a small impact such as vibration, leaving a foreign substance in the common mode filter. On the other hand, as shown in FIG. 3A, the conductors 7 and 8 peeled off by the laser described above are insulation that defines the boundary between the portion coated with the insulating coating and the portion removed by the laser. It has an end face of the coating, and the end face is flat without leaving an unpeeled piece of insulating coating or the like as in the case of peeling by mechanical peeling. Therefore, it is possible to reliably prevent foreign matter from remaining in the common mode filter 1.

  Both ends of the conductive wires 7 and 8 from which the insulation coating has been peeled off by the peeling method described above are joined and connected to the first metal terminal 5 and the second metal terminal 6 by ultrasonic bonding. Specifically, first, the flanges 4 and 4 having substantially the same shape provided with the first metal terminal 5 and the second metal terminal 6 are fixed to the anvil. Next, both ends of the conducting wires 7 and 8 are arranged so as to face the first metal terminal 5 and the second metal terminal 6, and the conducting wires 7 and 8 are directed toward the first metal terminal 5 and the second metal terminal 6 by a horn. Generates ultrasonic vibration while applying pressure. At this time, the first metal terminal 5 and the second metal terminal 6 are fixed to the anvil, and both ends of the conducting wires 7 and 8 vibrate in synchronization with the horn. Due to this vibration, the oxide film and dirt at the bonding interface between the first metal terminal 5 and the second metal terminal 6 and the conductive wires 7 and 8 are removed, and when the set oscillation time or energy is reached, the bonding is completed.

  According to such a connection structure of electronic parts, both ends of the conductive wires 7 and 8 are electrically connected to the first metal terminal 5 and the second metal terminal 6 by ultrasonic bonding in a state where the insulation coating is excluded. In addition, since at least a part of the lead portions 7c and 8c on the side continuous with the connecting portions 7b and 8b forms the insulation coating peeling portions 7c1 and 8c1 in which the core wire is exposed, a conductor having a small core wire diameter (core wire) Even when the first metal terminal 5 and the second metal terminal 6 are connected by ultrasonic bonding, the first metal terminal 5 and the second metal terminal 6 and the connecting portion 7b, The first metal terminal 5 and the second metal terminal 6 and the conductive wires 7 and 8 can be satisfactorily connected without leaving an insulating coating on the joint surface with 8b. That is, even when the diameters of the core wires of the conducting wires 7 and 8 are small, it is possible to satisfactorily realize the connecting by ultrasonic bonding. Furthermore, ultrasonic bonding can be satisfactorily performed in a state where there is no gap between the first metal terminal 5 and the second metal terminal 6 and the connecting portions 7b and 8b. Moreover, since the insulation coating peeling portions 7c1 and 8c1 from which the insulation coating has been removed are provided in the vicinity of the connection portions 7b and 8b of the lead portions 7c and 8c of the conducting wires 7 and 8, the lead portions 7c and 8c are connected to each other. It is possible to flexibly follow inclined surfaces 9 and 10 (to be described later) of the flange portions 4 and 4, and it is possible to prevent the lead portions 7c and 8c from expanding due to the insulation coating in the vicinity of the connecting portions 7b and 8b.

  As shown in FIG. 1 or FIG. 4, 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 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 second metal terminal 6 is provided. It is getting higher gradually. 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.

  As shown in FIG. 1 or FIG. 4, 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 FIGS. 1 and 5 to 7. FIG. 5 is a view of the plate core 20 as viewed from the drum type core 2 side in the z-axis direction. 6 is a cross-sectional view taken along the line V-V in FIG. 5, and FIG. 7 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, and 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. 5, the plate-shaped 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 convex portions 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-like 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 protrusions 22 are provided so as to protrude toward the drum type core 2 at the four corners of the plate-like core 20. Further, as shown in FIG. 7, the surfaces of the second convex portions 22 on the third convex portion 23 side each form an inclined surface 22 a, and spread toward each other in the direction of the drum type core 2, that is, downward in FIG. 7. 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 | abut 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. 5 and 6, 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 on the drum type core 2 side of the third convex portion 23 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.

  As shown in FIG. 8, when the plate-like 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.

  As shown in FIG. 9, 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. 9, the angle formed by the inclined surface 22a of the second convex portion 22 and the third side 20c and the fourth side 20d forms 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 corner formed by the second regulating surface 4a and the top surface 4A of the drum type core 2 and the corner 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. Further, since the concave portion 25 is formed, the plate-like core 20 may cause damage to these portions by directly contacting the lead portions 7c, 8c or the connecting portions 7b, 8b of the conducting wires 7, 8. Thus, the conductors 7 and 8 or the connecting portions 7b and 8b are protected. Moreover, a closed magnetic circuit can be formed.

  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. 5, 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 concave portion 25 remains formed, and it is avoided that the plate-like core 120 causes damage due to direct contact with the conducting wires 7 and 8 or the connecting portions 7b and 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, the portion where the conducting wires 7 and 8 are separated from the 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. Further, 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 further, the protruding end surface 22b of the second convex portion 22 is 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.

  In the present embodiment, the outermost surfaces of the first metal terminal 5 and the second metal terminal 6 are subjected to Au plating so as to correspond to the conductive paste. May be replaced with Pt plating, Ag plating, or Pd plating instead of Au plating. 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 wires 7 and 8 were the polyamide imide copper wires, you may be the insulation coating conducting wires by which other materials were insulation-coated. For example, a polyurethane copper wire may be used as the conducting wires 7 and 8.

  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. (A) The photograph which shows the state which the core wire of the conducting wire which concerns on embodiment of this invention exposed, (b) The photograph which shows the conducting wire by which the insulation coating was peeled by general mechanical peeling. 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 VI-VI line 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

DESCRIPTION OF SYMBOLS 1 ... Coil component 2 ... Drum type core 3 ... Core part 4 ... Eaves part 4A ... Top surface 4A-1 ... First top surface 4A-2 ... Second top surface 4B ... Bottom surface 4C ... First side surface 4D ... First Second side surface 4E ... outer end surface 4F ... first regulating surface 4G ... convex portion 4H ... concave portion 4a ... second regulating surface 5 ... first metal terminal 5a ... upper end surface 6 ... second metal terminals 7, 8 ... conducting wires 7a, 8a ... winding part 7b, 8b ... connecting line part 7c, 8c ... lead-out part 7c1, 8c1 ... insulating coating peeling part 7c2, 8c2 ... insulating coating part 7d, 8d ... boundary part 9 ... inclined surface 9a ... first inclined surface 9b ... 2nd inclined surface 10 ... inclined surface 20, 120 ... plate-like core 20a ... 1st side 20b ... 2nd side 20c ... 3rd side 20d ... 4th side 21 ... 1st convex part 22 ... 2nd convex part 22a ... inclined Surface 22b ... Projecting end surface 23 ... Third convex portion 23a ... Projecting end surface 24, 124 ... Fourth convex portion 25 ... Concave portion

Claims (5)

A conductor arrangement part;
A conductor that is disposed in the conductor arrangement portion and includes a core wire and an insulating coating that covers a peripheral surface of the core wire;
An electrode portion disposed at an end portion of the conductive wire placement portion and electrically connected by ultrasonic bonding in a state where both end portions of the conductive wire exclude the insulating coating;
The conducting wire has a lead-out portion extending from the lead-wire arranging portion to the electrode portion, and a connecting portion electrically connected to the electrode portion, and a side of the lead-out portion that is continuous with the connecting portion. A wiring structure for an electronic component, characterized in that at least a part forms an insulating coating peeling portion where the core wire is exposed.   2. The electron according to claim 1, wherein a cross-sectional shape and a cross-sectional area of the core wire of the insulating coating peeling portion are the same as a cross-sectional shape and a cross-sectional area of the core wire of the conductor arranged in the conductor arrangement portion. Connection structure of parts.   The surface connection state of the core wire of the insulating coating peeling portion is the same as the surface state of the conductive wire arranged in the conductor arrangement portion, The connection of electronic components according to claim 1 or claim 2, Construction.   The insulating coating has an end surface that defines a boundary between a portion of the lead-out portion covered with the insulating coating and the insulating coating peeling portion, and a surface state of the end surface is flat. The connection structure of the electronic component in any one of 1 thru | or 3.   The connecting structure for an electronic component according to claim 1, further comprising a plate-like core facing the connecting portion.

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