Coil component and guide member

Abstract

A coil (10) includes a coil portion (12) and a lead-out portion (14). The coil portion (12) is a part of the coil (10) in which a linear member is formed in a helical shape. The lead-out portion (14) is one end portion of the linear member extending from the coil portion (12). A guide member (20) is a member attached to the lead-out portion (14). The guide member (20) has a bending rigidity greater than that of the lead-out portion (14). The guide member (20) extends along at least a partial length region of the lead-out portion (14). Also, the guide member (20) covers at least a part of a surface of the partial length region.

Description

Coil component, guide member 【0001】 The present invention relates to a coil component and a guide member. 【0002】 In the case of a coil component, there may be a situation where a linear member such as a coil wire is drawn out from the coil and the tip of the linear member is to be connected to another component. Patent Document 1 below discloses a power conversion device including a high-frequency boost transformer (37) and a circuit board (20) on which the high-frequency boost transformer (37) is disposed. The lead wires (37A) of a pair of primary windings of the high-frequency boost transformer (37) are connected to a switching element (Q34) on the circuit board (20). 【0003】 Japanese Unexamined Patent Application Publication No. 2010-213478 【0004】 However, for example, the linear member may have low rigidity and it may be difficult to maintain it in a state having a predetermined shape. In this case, when connecting the linear member drawn out from the coil to another component, it is necessary to hold the linear member in a desired shape, and the work efficiency may decrease. 【0005】 The present invention has been made in view of the above problems, and provides a coil component capable of holding the shape of a linear member drawn out from a coil. 【0006】 The coil component of the present invention includes a coil including a coil portion in which a linear member is formed in a spiral shape and a lead-out portion that is one end portion of the linear member extending from the coil portion, and a guide member attached to the lead-out portion. The guide member has a bending rigidity greater than the bending rigidity of the lead-out portion, and the guide member extends along at least a partial length region of the lead-out portion and covers at least a part of the surface of the partial length region. 【0007】The guide member of the present invention is a guide member attached to the lead wire of a coil, and is formed in a cylindrical shape having an internal space extending in the longitudinal direction, and includes a first member and a second member having end faces along the longitudinal direction and extending in the longitudinal direction, and is characterized in that the first member and the second member are combined to form the cylindrical shape such that the end faces of the first member and the end faces of the second member face each other. 【0008】 According to the coil component of the present invention, the guide member has greater bending rigidity than the drawing portion, extends along a portion of the length of the drawing portion, and covers the surface of that portion, thereby enabling the guide member to maintain the shape of the drawing portion. Therefore, it is possible to provide a coil component that can maintain the shape of a linear member drawn from the coil. 【0009】 The aforementioned objectives, as well as other objectives, features, and advantages, will become even clearer from the preferred embodiments described below and the accompanying drawings. 【0010】Figure 2 is a perspective view showing an example of a coil component according to the first embodiment of the present invention. Figure 8(a) is an exploded perspective view of a coil component according to the first embodiment. The resin material is not shown in Figure 2. Figure 8(b) is a cross-sectional view showing an example of a coil component according to the first embodiment. The coil, bobbin, and core inside the case are shown by dotted lines. Figure 6(a) is a cross-sectional view of a part of the front end of the cross section along the dashed line in Figure 3, viewed in the direction of arrow VI-VI. Figure 6(b) is an enlarged view of the vicinity of the bend in Figure 6(a). Figure 6(c) is an enlarged view of the vicinity of the through hole in the case in Figure 6(a). Figure 8(a) is a bottom view of a coil component according to the first embodiment. Figure 8(a) is an exploded perspective view showing an example of a guide member according to this embodiment. Figure 8(b) is a cross-sectional view showing an example of a guide member according to this embodiment. Figure 6(a the vicinity of the through hole in the case of a coil component according to the second embodiment of the present invention, along the dashed line in Figure 3, viewed in the direction of arrow VI-VI. Figure 10(a) is a perspective view showing an example of a guide member according to a modified example. Figure 10(b) is a cross-sectional view of the guide member shown in Figure 10(a). Figure 10(c) is a perspective view showing another example of a guide member according to a modified example. Figure 10(d) is a cross-sectional view of the cross section shown by the dashed line in Figure 10(c) in the direction of the arrow Xd-Xd. 【0011】 The various components of the coil component and guide member of the present invention do not need to be independent entities; it is permissible for multiple components to be formed as a single member, for one component to be formed from multiple members, for one component to be part of another component, for parts of one component to overlap with parts of another component, and so on. Furthermore, the method of attaching the guide member described later may be explained using multiple steps described in order, but the order of description does not limit the order or timing of the execution of the multiple steps. For this reason, when implementing the above attachment method, the order of the multiple steps can be changed to the extent that it does not impede the content, and some or all of the execution timing of the multiple steps may overlap with each other. 【0012】 Embodiments of the present invention will be described below with reference to the drawings. In each drawing, corresponding components are denoted by the same reference numeral, and redundant explanations will be omitted as appropriate. In this embodiment, the directions of front, back, left, right, up, and down are defined and described as shown in the figures. However, this is defined for convenience in order to briefly explain the relative relationships of the components and does not limit the direction during manufacturing or use of the product implementing the present invention. In this embodiment, the up and down direction is the direction perpendicular to the main surface of the substrate when the coil component is placed on the substrate. In the up and down direction, the lower side is the side close to the substrate, and the upper side is the direction away from the substrate. In this embodiment, the up and down direction coincides with the winding axis direction, which will be described later. The up and down direction may also be called the vertical direction, and the direction perpendicular to the up and down direction (for example, the front and back direction or the left and right direction) may be called the horizontal direction. Furthermore, in this invention, a plane means a shape that is physically formed with a plane as the target, and it is not necessary for it to be a geometrically perfect plane. 【0013】 <First Embodiment> (Coil Component) Figure 1 is a perspective view showing an example of a coil component 1 according to the first embodiment of the present invention. 【0014】First, an overview of the coil component 1 of this embodiment will be described. The coil component 1 comprises a coil 10 and a guide member 20. The coil 10 includes a coil portion 12 and an extension portion 14. The coil portion 12 is a part of the coil 10 in which a linear member 16 is formed in a spiral shape. The extension portion 14 is one end of the linear member 16 extending from the coil portion 12. The guide member 20 is a member attached to the extension portion 14. The guide member 20 has a bending rigidity greater than that of the extension portion 14. The guide member 20 extends along at least a portion of the length region (covered region 14a) of the extension portion 14. The guide member 20 also covers at least a portion of the surface of the said length region (covered region 14a). According to the above configuration, the guide member 20 has greater bending rigidity than the draw-out portion 14, extends along a portion of the length of the draw-out portion 14, and covers the surface of that portion of the length, thereby enabling the guide member 20 to maintain the shape of the draw-out portion 14. Therefore, it is possible to provide a coil component 1 that can maintain the shape of the linear member 16 (draw-out portion 14) drawn out from the coil 10. 【0015】Here, the ability of the guide member 20 to maintain the shape of the linear member 16 (pull-out portion 14) means that the deformation of the pull-out portion 14 is restricted by the guide member 20, and the linear member 16 (pull-out portion 14) maintains a certain shape. The present invention is not limited to the linear member 16 (pull-out portion 14) being fixed in a predetermined shape that does not deform at all. Even while the shape of the pull-out portion 14 is maintained by the guide member 20, there may be some room for the shape of the pull-out portion 14 to deform slightly within a certain range. For example, within the internal space 22 of the guide member 20, which will be described later, the pull-out portion 14 may move slightly (may be misaligned) within the width direction of the internal space 22. Because the pull-out portion 14 is maintained in a certain shape by the guide member 20 in this way, when connecting the tip of the pull-out portion 14 (the terminal 60 fixed to the tip, which will be described later) to another part, it is easy to position the tip of the pull-out portion 14 at a desired position on the other part (hereinafter referred to as the connection target 70). This eliminates the need to deform the drawer portion 14 so that its tip is positioned at a desired location on the connection target 70, and then maintain the shape of the drawer portion 14. 【0016】In this embodiment, the pull-out section 14 is supported by the guide member 20 so that, in its natural state, the tip of the pull-out section 14 is positioned at a predetermined position or height. The natural state is a state in which the guide member 20 is not supported by means other than the coil component 1, such as a hand or jig. In other words, the pull-out section 14 maintains a desired posture by the guide member 20. To put it another way, the pull-out section 14 is not unexpectedly bent at its base end (especially the part exposed from the guide member 20). By maintaining the desired posture of the pull-out section 14 in this way, it becomes easier to position the tip of the pull-out section 14 at a desired position on the connection target 70. This is because, in its natural state, the tip of the pull-out section 14 is positioned at the approximate location on the connection target 70 where the pull-out section 14 (terminal 60) will connect, provided that the desired posture of the pull-out section 14 is maintained. Alternatively, the shape of the pull-out portion 14 (especially the covering area 14a) may be maintained in a constant shape by the guide member 20, but the tip of the pull-out portion 14 may not be maintained in a desired position in its natural state. That is, the shape of a part of the pull-out portion 14 that is not supported by the guide member 20 (for example, a part other than the covering area 14a) may not be maintained by the guide member 20, and this part may be deformable. Even in this case, the fact that the shape of at least a part of the pull-out portion 14 is maintained in a constant shape makes it easy to position the tip of the pull-out portion 14 at a desired position on the connection target 70. 【0017】 Furthermore, in this embodiment, since the guide member 20 is attached to the pull-out section 14, the guide member 20 does not depend as much on the shape of the coil component 1, including the shape of the case 30, compared to the case where the guide member 20 is attached to the case, thereby increasing the design freedom of the coil component 1. For example, when the guide member 20 is attached to the case 30, it may be necessary to provide a structure for attaching the guide member 20 (for example, a structure for engaging the guide member 20) in the case 30. By attaching the guide member 20 to the pull-out section 14, the design freedom of the case 30 can be increased. 【0018】Next, the coil component of this embodiment will be described in detail. The coil component 1 is a component having a coil 10. The coil component 1 is placed on a substrate (not shown, such as a mounting substrate) as described later, and is electrically connected to other components (connection targets 70) on the substrate or another substrate, and together with the connection targets 70, constitutes an electronic circuit. In this embodiment, the coil component 1 has a mounting surface on which the coil component 1 can be mounted. Here, the mounting surface is the surface of the coil component 1 that faces the upper surface of the substrate (the surface facing the coil component 1). In other words, the mounting surface is the surface of the coil component 1 that is in surface contact with the upper surface of the substrate, or the surface that is spaced apart from the upper surface of the substrate and faces the upper surface. To put it another way, the coil component 1 is mounted on the substrate so that the mounting surface is substantially parallel to the upper surface of the substrate. In this embodiment, the coil component 1 is placed on the substrate so that the lower surface of the coil component 1 (the lower surface 30a of the case 30 described later) is in contact with the upper surface of the substrate. In this embodiment, the mounting surface of the coil component 1 is the lower surface of the coil component 1 (the lower surface 30a of the case 30). 【0019】As shown in Figure 2, the coil 10 is a part of the coil component 1 having a coil section 12 in which a conductive linear member 16 is formed in a spiral shape. The coil 10 includes the coil section 12 and the lead section 14. The coil section 12 is the part in which the linear member 16 is formed in a spiral shape. In this embodiment, the coil section 12 is formed in a spiral shape by winding the linear member 16 around the bobbin 13. In this embodiment, the linear member 16 is wound around the bobbin 13 with the winding axis in the vertical direction. Here, the linear member 16 being formed in a spiral shape means that the linear member 16 forms at least one loop. The lead section 14 is one end of the linear member 16 that extends outward from the coil section 12. Specifically, the lead section 14 in the coil 10 is one end of the linear member 16 that forms the coil section 12 of the coil 10. In other words, the lead section 14 is the lead wire of the coil 10. The lead wires are conductors for connecting the coil 10 (coil portion 12) to the circuit. That is, the lead portion 14, which is the lead wire, is formed from the same material (linear member 16) as the coil portion 12 and is electrically connected to the coil portion 12. In this embodiment, the linear member 16 that forms the coil portion 12 extends from the circumferential surface of the coil portion 12 toward the side of the coil portion 12 (radially outward from the coil portion 12). A portion of the length of the linear member 16 protruding from the circumferential surface of the coil portion 12 is the lead portion 14. The direction of the lead portion 14 from the coil portion 12 may be lateral, as in this embodiment, or it may be upward or downward. 【0020】The linear member 16 is conductive. In this embodiment, the circumferential surface of the conductive main body of the linear member 16 is covered with an insulating material. That is, the outermost circumferential surface of the linear member 16 is the insulating material. More specifically, the linear member 16 in this embodiment is a Litz wire, as will be described later, and the insulating material is an insulating tube. The material of the insulating tube in this embodiment is enamel containing a resin such as polyester. Furthermore, the linear member 16 (its main body) in this embodiment is a Litz wire formed by bundling together a plurality of conductive wires. More specifically, the linear member 16 in this embodiment has a main body formed by bundling together a plurality of conductive wires, and an insulating tube that houses the main body inside. Each conductive wire may have an insulating coating so that the plurality of conductive wires are insulated from each other, or each conductive wire may not have an insulating coating. Instead of this embodiment, the linear member 16 may be just one conductive coil wire (single wire). In this case, the coil wire may be covered with an insulating coating, which is an insulating material, or it may be a wire with an exposed coil core. The cross-sectional shape of the linear member 16 in this embodiment is circular, but it may be a polygon including a rectangle, an ellipse, or any other shape. 【0021】As described later, the linear member 16 in this embodiment has a bending rigidity smaller than that of the guide member 20. In other words, the linear member 16 in this embodiment has higher flexibility than the guide member 20. On the other hand, the linear member 16 in this embodiment has spring properties. The linear member 16 in this embodiment has higher spring properties than the guide member 20. Specifically, when an external force is applied to try to bend or deflect the linear member 16, the linear member 16 tries to return to its original shape (for example, a straight line) due to its own elastic restoring force. For this reason, the linear member 16 is not easily plastically deformed, and even if an external force is applied to the linear member 16 and it is bent, it is difficult to maintain the bent shape of the linear member 16. In this embodiment, the linear member 16 has a greater elastic restoring force than the case 30 (case body 31 or holder 30f) or the guide member 20. Instead of this embodiment, the linear member 16 may be a member that can be shaped into a desired shape. For example, if an external force is applied to bend or deflect the linear member 16, the linear member 16 may be able to maintain approximately the desired bent shape. In such a case, the tip of the pull-out portion 14 (linear member 16) can be positioned at a desired location by supporting it with the guide member 20. 【0022】The coil component 1 may have only one linear member 16, or it may have two or more linear members 16. As shown in Figure 2, in this embodiment, multiple linear members 16 are wound around a bobbin 13. In other words, the coil component 1 has a primary coil and a secondary coil. Specifically, in this embodiment, two linear members 16 are wound around a bobbin 13. Both ends of the first linear member 16 are pulled forward, and both ends of the second linear member 16 are pulled backward. When the coil component 1 has multiple linear members 16, guide members 20, which will be described later, may be attached to all of the linear members 16, or guide members 20 may be attached to only some of the linear members 16. In this embodiment, a guide member 20, which will be described later, is attached only to the first linear member 16, and no guide member 20 is attached to the second linear member 16. Furthermore, in this embodiment, guide members 20 are attached to both ends of the first linear member 16, but it is also possible that a guide member 20 is attached to only one end of the linear member 16, and not to the other end.Hereafter, when simply referred to as the linear member 16 or simply as the pull-out section 14, it refers to the linear member 16 or pull-out section 14 to which the guide member 20 is attached.In addition, in this embodiment, as described above, both ends of one linear member 16 are pulled out in the same direction.Alternatively, both ends of one linear member 16 may be pulled out in different directions. 【0023】 In this embodiment, the lead portion 14 has a terminal 60 at its tip. Here, the tip of the lead portion 14 is the end distal to the coil portion 12 in the extending direction of the lead portion 14. The base end of the lead portion 14 is the end opposite to the tip in the extending direction of the lead portion 14. In other words, the base end of the lead portion 14 is the end in the lead portion 14 that is close to the circumferential surface of the coil portion 12 in the length region of the lead portion 14 from the circumferential surface of the coil portion 12 to the tip. In this embodiment, the rear end of the lead portion 14 is the base end, and the front end is the tip. The terminal 60 is a component for electrically connecting to the connection target 70. The terminal 60 is made of a conductive material such as metal. 【0024】 As shown in Figure 2, the terminal 60 is electrically connected to the lead portion 14. In this embodiment, the terminal 60 is joined to the lead portion 14 by a soldering agent (not shown). Alternatively, the terminal 60 may be electrically connected to the lead portion 14 by other methods such as welding. Specifically, at a part of the tip side of the lead portion 14, the main body of the lead portion 14 is exposed from the insulating tube. The main body of the lead portion 14 is soldered to the terminal 60. In this case, if each conductive wire in the litz wire has an insulating coating, it is preferable that the insulating coating is removed at a part of the tip side of the conductive wire to expose the coil core. As shown in Figure 4, the terminal 60 has a flat connection surface 62 that connects to the connection target 70. In this embodiment, the connection surface 62 is a part of the surface of the terminal 60 that faces downward. The terminal 60 is positioned and fixed so that its connecting surface 62 makes surface contact with the surface 71 of the object to be connected 70, thereby electrically connecting the coil component 1 to the object to be connected 70 via the terminal 60. More specifically, in this embodiment, the terminal 60 is placed on the object to be connected 70 so that its connecting surface 62 makes contact with the surface 71 of the object to be connected 70. The terminal 60 is supported by the object to be connected 70. More specifically, in this embodiment, the load of the terminal 60 is supported by the object to be connected 70, and the loads of the lead-out portion 14 and the guide member 20 are also supported by the object to be connected 70 via the terminal 60. In this embodiment, as shown in Figure 6, a hole is formed in both the terminal 60 and the object to be connected 70 that penetrates in the vertical direction. The terminal 60 is placed on the object to be connected 70 so that the hole in the terminal 60 and the hole in the object to be connected 70 overlap in the vertical direction, and a screw shaft is inserted into the two holes and the terminal 60 is fixed to the object to be connected 70 by screw fastening. Alternatively, the terminal 60 may be fixed to the connection target 70 by welding, brazing, or other methods. 【0025】As shown in Figure 2, the coil component 1 of this embodiment further has a core 40. The core 40 is made of a magnetic material. The core 40 of this embodiment includes a first core 41 and a second core 42. The first core 41 and the second core 42 are combined to form a closed magnetic circuit. Specifically, both the first core 41 and the second core 42 in this embodiment are PQ cores, and these PQ cores are combined vertically. The middle legs of the first core 41 and the second core 42 are inserted into the inside of the bobbin 13 (inside the coil portion 12). The outer legs of the first core 41 and the second core 42 are arranged to cover the outside of the outer circumferential surface of the coil portion 12. Alternatively, the coil component 1 may not have a core 40. 【0026】As shown in Figure 1, in this embodiment, the coil component 1 further comprises a case 30. The case 30 is a member that houses the coil portion 12 inside. The interior of the case 30 is a space defined by side portions 30b or a bottom plate 30e (see Figure 7) that cover at least a portion of the front, back, left, right, top, and bottom. In this embodiment, the case 30 has side portions 30b that surround and cover the coil portion 12, and also has a bottom plate 30e that covers the bottom of the coil portion 12. In this embodiment, the case 30 is open at the top. Alternatively, the case 30 may be open on a part of the side, and may not have a bottom plate 30e. When a part of the case 30 covers the coil portion 12, it means that the part of the case 30 overlaps with at least a part or all of the coil portion 12 in a direction perpendicular to the main surface of the part. At least a part of the coil portion 12 is located inside the case 30 (within the enveloping volume of the case 30). In this embodiment, the entire coil portion 12 is located inside the case 30. Alternatively, only a portion of the coil section 12 may be placed inside the case 30. Also, the case 30 is a separate component from the guide member 20, which will be described later. The case 30 being a separate component from the guide member 20 means that the case 30 is a distinct component from the guide member 20. The material forming the case 30 may be the same as the material forming the guide member 20, or it may be different from the material forming the guide member 20. In this embodiment, the case 30 (particularly the case body 31 and the bottom plate 30e) is mainly made of metal, but the case 30 may be made of other materials such as resin. 【0027】As shown in Figure 2, the case 30 in this embodiment has a case body 31 and a holder 30f. The case body 31 is a housing that accommodates at least part or all of the coil section 12 in the case 30. The holder 30f is a separate component from the case body 31 and is attached to the case body 31 to hold the pull-out section 14. A notch 32 is formed in the case body 31, and the holder 30f is attached so as to fit into the notch 32. As will be described later, the pull-out section 14 is inserted through a through hole 30c provided in the holder 30f, and the holder 30f holds the pull-out section 14. Specifically, the holder 30f defines the direction in which the pull-out section 14 is drawn out. Because the holder 30f is a separate component from the case body 31, the pull-out section 14 can be inserted through the through hole 30c of the holder 30f outside the case body 31 before the coil section 12 is housed in the case body 31. This facilitates the placement of the coil 10 into the case 30. In this embodiment, the holder 30f is made of resin, but it may be made of other materials such as metal. Alternatively, the holder 30f and the case body 31 may be integrally formed from the same material. 【0028】As shown in Figure 4, in this embodiment, where the coil component 1 has a case 30, the pull-out portion 14 is pulled out to the outside of the case 30. More specifically, as shown in Figure 4 or Figure 5, in this embodiment, a through hole 30c is formed in the side portion 30b of the case 30 that covers the side of the coil portion 12, and the through hole 30c penetrates through in the thickness direction. The pull-out portion 14 is pulled out from the coil portion 12 housed inside the case 30 through the through hole 30c to the outside of the case 30. At least a portion of the side portion 30b of the case 30 covers the side of the coil portion 12. In other words, the coil portion 12 and the side portion 30b overlap in the lateral direction (front-to-back direction or left-to-right direction). In this embodiment, the pull-out portion 14 is pulled out laterally (forward), and the side portion 30b covers the outside (front side) of the coil portion 12 in the direction of pull-out of the pull-out portion 14. The case 30 in this embodiment includes the case body 31 and the holder 30f as described above. Therefore, the side portion 30b of this embodiment is composed of the case body 31 and the holder 30f. In this embodiment, the through hole 30c is formed in the holder 30f. In this embodiment, the through hole 30c has a larger shape and dimensions than the cross-section of the pull-out portion 14, as will be described later. In this embodiment, the shape of the through hole 30c is circular, but it may be a polygon including a rectangle, an ellipse, or any other shape. In this embodiment, the pull-out portion 14 is pulled forward from the circumferential surface of the coil portion 12 and pulled out from the inside of the case 30 to the outside of the case 30 through the through hole 30c of the holder 30f. In this embodiment, the pull-out portion 14 is loosely inserted into the through hole 30c. Specifically, the wire diameter of the pull-out portion 14 is smaller than the diameter of the through hole 30c, and as will be described later, there is a gap between the circumferential surface of the pull-out portion 14 and the inner wall surface 30d of the through hole 30c. This makes it easy to insert the pull-out portion 14 into the through hole 30c. Alternatively, the pull-out portion 14 may be pressed into the through hole 30c. That is, the cross-sectional shape of the pull-out portion 14 may be substantially the same as the shape of the through hole 30c, or smaller in shape and dimensions than the through hole 30c. 【0029】As shown in Figure 6(a), in this embodiment, the coil component 1 further comprises a resin material 50 disposed inside the case 30. In other words, the inside of the case 30 is filled with resin material 50. More specifically, the resin material 50 is filled as a potting material in the space inside the case 30 where the coil 10, core 40, bobbin 13, etc., are not disposed. The resin material 50 is in close contact with adjacent members (for example, the case 30, bobbin 13, core 40, and coil 10). Here, the inside of the case 30 in which the resin material 50 can be filled is the space inside the outer surface of the case 30. That is, the inside of the case 30 in which the resin material 50 can be filled may include not only the space inside the case 30 beyond the main inner surface of the side portion 30b and the bottom plate, but also the space inside the through hole 30c. In this embodiment, the resin material 50 disposed in the space inside the case 30 beyond the main inner surface (inner wall surface) of the side portion 30b and the bottom plate is called the main body portion 51. The protruding portion 52 (see Figure 6(c)) that protrudes from the main body portion 51 and is positioned inside the through hole 30c will be described later. At least a part of the resin material 50 (main body portion 51) is positioned between the side portion 30b and the coil portion 12. Specifically, as shown in Figure 6(a), the main body portion 51 is positioned so as to be sandwiched between the circumferential surface of the coil portion 12 and the inner main surface of the side portion 30b. In this embodiment, as shown in Figure 3, the resin material 50 is positioned to surround the coil 10 (see Figure 2) and the core 40. Also, as shown in Figure 6(a), in this embodiment, the upper surface of the resin material 50 is located on the same plane as the upper surface of the core 40 (first core 41), and the lower surface of the resin material 50 is located on the same plane as the lower surface of the core 40 (second core 42) and the upper surface of the bottom plate 30e, respectively. Examples of resins constituting the resin material 50 in this embodiment include silicone resins, urethane resins, or epoxy resins. In this embodiment, the resin material 50 has less rigidity than the case 30. 【0030】The guide member 20 is a member attached to the drawer section 14. The guide member 20 being attached to the drawer section 14 means that the guide member 20 is physically connected to the drawer section 14 and is held in a desired position relative to the drawer section 14. Specifically, the guide member 20 is positioned around the drawer section 14, and its relative position to the drawer section 14 is maintained within a certain range due to its physical relationship with the drawer section 14. In this embodiment, the cylindrical guide member 20 covers the outer circumferential surface of a portion of the length of the drawer section 14, and a certain amount of friction is generated between the outer circumferential surface of the drawer section 14 and the inner wall surface of the guide member 20, thus maintaining the relative position of the guide member 20 to the drawer section 14 within a certain range. Furthermore, in this embodiment, as will be described later, the drawer section 14 has a curved portion 14b, and the guide member 20 covers the curved portion 14b in a manner that conforms to the curved shape of the curved portion 14b. As a result, the pull-out section 14 is less likely to come off the guide member 20, and the relative position of the guide member 20 with respect to the pull-out section 14 is sufficiently maintained within a certain range. Alternatively, the relative position of the guide member 20 with respect to the pull-out section 14 may be maintained within a certain range by the pull-out section 14 engaging with the guide member 20, for example. 【0031】In this embodiment, the guide member 20 is supported by the pull-out section 14 in its natural state. Specifically, all or part of the load (self-weight) of the guide member 20 is directly supported by the pull-out section 14. Part of the load of the guide member 20 may be directly supported by a member other than the pull-out section 14 (for example, the case 30), but in this case, the load of the guide member 20 directly supported by the pull-out section 14 is greater than the load of the guide member 20 directly supported by a member other than the pull-out section 14. That is, the load of the guide member 20 is mainly supported by the pull-out section 14. More specifically, in this embodiment, the entire load (self-weight) of the guide member 20 is directly supported by the pull-out section 14. In this embodiment, the guide member 20 is spaced apart from the case 30, and the load (self-weight) of the guide member 20 is not directly supported by the case 30. Here, the natural state is a state in which the guide member 20 is not supported by an object other than the coil component 1, such as a hand, a jig, or a substrate on which the coil component 1 is placed. 【0032】 As shown in Figure 6(a) or Figure 9 illustrating the second embodiment described later, the guide member 20 in this embodiment is positioned outside the case 30, beyond the inner wall surface of the case 30. More specifically, the entire guide member 20 (the entire length region from the base end to the tip) is positioned outside the case 30, beyond the inner wall surface of the case 30 (particularly the side portion 30b). By attaching the guide member 20 to the drawer portion 14 approximately outside the case 30 in this way, the guide member 20 can be attached to the drawer portion 14 regardless of the shape of the case 30. In this embodiment, as shown in Figure 6(a), the guide member 20 is positioned outside the case 30, beyond the outer wall surface of the case 30. 【0033】As described above, the guide member 20 has greater bending rigidity than the bending rigidity of the extension portion 14. Here, bending rigidity refers to the rigidity when attempting to bend the extension portion 14 or the guide member 20 in the direction of extension of the extension portion 14. Because the guide member 20 has greater bending rigidity than the bending rigidity of the extension portion 14, the guide member 20 can hold the extension portion 14 in the desired shape. In addition, on the substrate on which the coil component 1 is placed, other electronic components (including components of the connection target 70) may be arranged around the coil component 1. Because the guide member 20 can hold the extension portion 14 in the desired shape, interference between the extension portion 14 and other electronic components on the substrate can be reduced. 【0034】As described above, the guide member 20 extends along at least a portion of the length region (covered region 14a) of the pull-out portion 14. The guide member 20 being along the pull-out portion 14 means that the guide member 20 extends along the direction of extension of the pull-out portion 14 and is positioned close to the pull-out portion 14. Preferably, the guide member 20 extends substantially parallel to the direction of extension of the pull-out portion 14. The guide member 20 being close to the pull-out portion 14 means that the distance between the guide member 20 and the pull-out portion 14 is less than a predetermined value. In this embodiment, the distance between the guide member 20 and the pull-out portion 14 is less than the width dimension of the guide member 20 (the dimension of the guide member 20 in a direction perpendicular to the direction of extension of the guide member 20). Also in this embodiment, the distance between the guide member 20 and the pull-out portion 14 is less than the width dimension of the pull-out portion 14 (the dimension of the guide member 20 in a direction perpendicular to the direction of extension of the pull-out portion 14; the wire diameter of the pull-out portion 14). As described above, in this embodiment, the guide member 20 extends along the extending direction of the pull-out portion 14. In other words, the entire guide member 20 has the same shape as the entire pull-out portion 14 (covered area 14a) (here, "same" includes substantially the same, meaning a shape that can be generally considered identical), and the overall shape of the guide member 20 and the overall shape of the pull-out portion 14 are positioned to overlap each other. Specifically, when the shape of the pull-out portion 14 (covered area 14a) is linear, the shape of the guide member 20 is also linear. Furthermore, when the pull-out portion 14 (covered area 14a) has a bent shape (when it has a curved portion 14b, which will be described later), the guide member 20 also has a bent shape. Specifically, when the pull-out portion 14 has a curved portion 14b that curves in a predetermined direction (curving direction), a part of the guide member 20 that accommodates the curved portion 14b (a bent portion 24, which will be described later) is bent along that curving direction. 【0035】In this embodiment, the guide member 20 has a bent portion 24, which will be described later, and has multiple length regions (for example, a first length region 20a, a second length region 20b, and a third length region 20c) with different extending directions on either side of the bent portion 24. In this embodiment, two adjacent partial length regions on either side of the bent portion 24 are adjacent to each other at one end of each partial length region, with the bent portion 24 in between. Also, these two adjacent partial length regions on either side of the bent portion 24 are spaced apart from each other at the center of each of the two partial length regions. In this way, the long guide member 20 has substantially the same shape as the curved linear extension portion 14. Specifically, for example, as shown in Figure 6(a), the first length region 20a and the second length region 20b are adjacent to each other with the bent portion 24 (first bent portion 24a) in between. The first length region 20a and the second length region 20b are adjacent to each other with the bent portion 24 in between at the tip of the first length region 20a and the base of the second length region 20b. On the other hand, the central part of the first length region 20a (the central part in the direction of extension of the first length region 20a) is neither adjacent to nor connected to the central part of the second length region 20b (the central part in the direction of extension of the second length region 20b), and is separated from it. 【0036】The covered area 14a is the length region of the pull-out portion 14 along which the guide member 20 follows. In this embodiment, the covered area 14a is a portion of the total length region of the pull-out portion 14. Specifically, in this embodiment, a portion of the tip side and a portion of the base side of the pull-out portion 14 are exposed from the guide member 20. More specifically, of the portion of the length region of the pull-out portion 14 that extends outside the case 30, a portion of the tip side and a portion of the base side are exposed from the guide member 20. In other words, the covered area 14a in this embodiment is the portion of the length region of the pull-out portion 14 that extends outside the case 30, sandwiched between a portion of the tip side and a portion of the base side. Alternatively, the entire length region of the pull-out portion 14 may be the covered area 14a, or the entire portion of the covered area 14a that extends outside the case 30 may be the covered area 14a. Alternatively, as shown in the modified example described later, only a relatively short portion of the length of the pull-out section 14 (for example, the curved section 14b) may be covered by the guide member 20, and this portion may be locally covered by the guide member 20. 【0037】As described above, the guide member 20 covers at least a portion of the surface of the covered area 14a. The surface of the covered area 14a covered by the guide member 20 is the surface region of the covered area 14a that faces outward in the radial direction of the covered area 14a. In other words, the surface of the covered area 14a covered by the guide member 20 is the circumferential surface of the covered area 14a. The radial direction of the covered area 14a (the radial direction of the pull-out portion 14) is the radial direction from the central axis of the pull-out portion 14 toward the circumferential surface of the pull-out portion 14. This radial direction is also called the radial direction. When we say that the guide member 20 covers at least a portion of the surface of the covered area 14a, we mean that the guide member 20 overlaps with at least a portion of the circumferential surface of the covered area 14a in the radial direction of the pull-out portion 14. In this embodiment, the guide member 20 is a cylindrical member that surrounds the covered area 14a and covers the entire (approximately entire) circumferential surface of the covered area 14a. Alternatively, the guide member 20 may cover only a portion of the circumferential surface of the covered area 14a. For example, as will be explained in the modified example described later, the guide member 20 with an open annular cross-section does not cover a portion of the lateral side of the covered area 14a, but covers only a portion of the radial circumferential surface of the covered area 14a. 【0038】 The guide member 20 in this embodiment is made of an insulating material. Examples of insulating materials include thermoplastic resins containing polyvinyl chloride or thermosetting resins containing phenolic resin. Because the guide member 20 is made of an insulating material, it is possible to effectively insulate the lead portion 14 from other electronic components arranged around the coil component 1 on the substrate. 【0039】As shown in Figure 4, the guide member 20 is a long member extending in a predetermined direction. Here, the direction in which the guide member 20 extends is simply called the length direction. The guide member 20 extends in this length direction from the base end to the tip end. The base end is the end of the guide member 20 that is close to the coil 10 in the length direction. The tip end is the end of the guide member 20 in the length direction opposite to the base end. In this embodiment, the end on the rear end side of the guide member 20 is the base end, and the end on the front end side is the tip end. The guide member 20 is said to be long if the dimensions of the guide member 20 in the length direction are larger than the dimensions of the guide member 20 in the direction perpendicular to the length direction (width direction). Because the guide member 20 is a long member in this way, the shape of the pull-out portion 14 can be maintained over a predetermined length area. The length direction of the guide member 20 coincides with the shape of the long guide member 20. For example, if the guide member 20 is straight, the length direction of the guide member 20 is straight. If the guide member 20 is bent or curved, then the length of the guide member 20 is bent or curved. 【0040】 As shown in Figure 6(a), the shape of the pull-out section 14 is maintained by a guide member 20 that is more rigid than the pull-out section 14. Specifically, the shape of the pull-out section 14 is controlled by the inner wall that defines the interior (internal space 22) of the guide member 20. In other words, the shape of the pull-out section 14 is maintained by the guide member 20 because the inner wall of the guide member 20 is pressed against or in contact with part or all of the pull-out section 14. As a result, the shape of the pull-out section 14 substantially coincides with the shape of the internal space 22 due to the inner wall that defines the internal space 22. In other words, the pull-out section 14 is bent or curved at the same position as the guide member 20. Furthermore, if the guide member 20 is bent or curved, the degree of bending or curvature in the pull-out section 14 (for example, the degree of curvature of the curved section 14b) is approximately the same as the degree of bending or curvature in the guide member 20 (for example, the bending angle of the bent section 24). 【0041】In this embodiment, the pull-out section 14 is curved, and the curved shape (bent shape) of the pull-out section 14 is maintained by the guide member 20. Specifically, as shown in Figure 6(a), the guide member 20 has a bent portion 24 which is a part of the curved section. The pull-out section 14 in this embodiment has a curved portion 14b which is more curved than other parts of its length. For example, the bent portion 24 is formed in a curved shape having a radius of curvature smaller than the radius of curvature of the first length area 20a, the second length area 20b, or the third length area 20c, which will be described later. Furthermore, the curved portion 14b is formed in a curved shape having a radius of curvature smaller than the radius of curvature of a part of the length area of ​​the pull-out section 14 that is located inside the first length area 20a, the second length area 20b, or the third length area 20c, which will be described later. The curved portion 14b is located inside the bent portion 24, and the shape of the curved portion 14b is maintained by the bent portion 24 of the guide member 20. Specifically, the shape of the curved portion 14b is defined and maintained by the bent portion 24 because a part or all of the outer surface of the curved portion 14b abuts against or is pressed against the inner wall of the bent portion 24. In this way, since at least the curved portion 14b of the pull-out portion 14 is covered by the guide member 20 (bent portion 24), the shape of the pull-out portion 14 can be maintained in the desired shape by the guide member 20. 【0042】As shown in Figure 8(a), in this embodiment, the guide member 20 includes a first member 25 and a second member 26. Each of the first member 25 and the second member 26 has an end face (first end face 25a or second end face 26a) along its length and extends in that length direction. The guide member 20 is formed in a cylindrical shape by combining the first member 25 and the second member 26 so that the end face of the first member 25 (first end face 25a) and the end face of the second member 26 (second end face 26a) face each other. The pull-out portion 14 (covered area 14a) is housed inside the guide member 20 (internal space 22). As described above, since the guide member 20 is cylindrical and the pull-out portion 14 is housed inside the cylindrical part, approximately the entire circumference of the pull-out portion 14 is covered and held by the guide member 20. As a result, the insulating effect of the guide member 20 between the pull-out portion 14 and other electronic components on the substrate is better achieved. Furthermore, when housing the pull-out section 14 in the cylindrical guide member 20, the fact that the guide member 20 is divided into two in the direction of its extension makes it easier to house the pull-out section 14 in the guide member 20. Specifically, for example, the pull-out section 14 is first fitted into the first member 25, and then the second member 26 is combined with the first member 25 into which the pull-out section 14 is fitted, thereby easily housing the pull-out section 14 in the guide member 20. 【0043】As shown in Figure 8(a), the first member 25 and the second member 26 are combined vertically or horizontally to form a cylindrical guide member 20. In other words, the first member 25 and the second member 26 are formed by dividing the cylindrical guide member 20 so that it passes through the central axis of the guide member 20. In this embodiment, the first member 25 and the second member 26 are formed by dividing the guide member 20 in the left-right direction so that it passes through the axial center of the guide member 20. Specifically, the first member 25 and the second member 26 are formed by dividing the guide member 20 in a single plane that includes the axial center of the guide member 20. In this embodiment, the single plane is a virtual plane that follows the cross-section shown in Figure 6(a). In other words, the end faces of the first member 25 and the second member 26 are located on this single plane. The first member 25 and the second member 26 in this embodiment have a mirror-symmetric shape in this single plane. Alternatively, the first member 25 and the second member 26 may be formed by dividing the guide member 20 into two vertical sections so as to pass through the axial center of the guide member 20. That is, the first member 25 and the second member 26 may be formed by dividing the first length region 20a and the third length region 20c, which will be described later, into two sections along a plane along the lateral direction, and dividing the second length region 20b, which will be described later, into two sections along a plane along the vertical direction. 【0044】 As shown in Figure 8(b), in this embodiment, the first end face 25a and the second end face 26a are in surface contact. Alternatively, the first end face 25a and the second end face 26a may be spaced apart from each other to the extent that the guide member 20 can be recognized as cylindrical. For example, if the recessed or protruding engagement portion 21, which will be described later, is formed on the first end face 25a and the second end face 26a, then a portion of the first end face 25a and a portion of the second end face 26a may be spaced apart from each other, as long as the recesses or protrusions formed on the first end face 25a and the second end face 26a are engaged with each other. Furthermore, if the first member 25 and the second member 26 are joined by an adhesive, then a portion of the first end face 25a and a portion of the second end face 26a may be spaced apart from each other, as long as the first end face 25a and the second end face 26a are joined by the adhesive and the space between the first end face 25a and the second end face 26a is filled with the adhesive. 【0045】 As shown in FIG. 6(a), in the present embodiment, the first member 25 and the second member 26 (see FIG. 8(a)) are formed along the bending direction of the bending portion 14b. The end surface of the first member 25 (the first end surface 25a) and the end surface of the second member 26 (the second end surface 26a) are along a plane including the bending direction of the bending portion 14b. The said plane is a single plane including the bending direction, and in the present embodiment, it is a virtual plane along the cross-section shown in FIG. 6(a). The bending portion 14b is arranged in the cylindrical interior (the internal space 22) formed by combining the first member 25 and the second member 26. With the above configuration, the bending shape of the drawing portion 14 (the bending portion 14b) can be held by the guide member 20, and thus the overall shape of the drawing portion 14 can be approximately held by the guide member 20. In the present embodiment, since the end surfaces of the first member 25 and the second member 26 are each along a plane including the bending direction of the bending portion 14b, each of the first member 25 and the second member 26 covers both the inner bending side peripheral surface and the outer bending side peripheral surface of the bending portion 14b. Since the first member 25 and the second member 26 are respectively arranged on the outer bending side and the inner bending side of the bending portion 14b, even if the space between the first member 25 and the second member 26 is unexpectedly separated, the bending shape of the bending portion 14b is maintained. In the bending shape or the buckling shape, the inner bending side is the side close to the bending center in the bending shape or the buckling shape, and the outer bending side in the bending shape or the buckling shape is the side away from the bending center in the bending shape or the buckling shape. 【0046】As shown in Figure 8(b), in this embodiment, the end faces (first end face 25a and second end face 26a) of the first member 25 and the second member 26 are formed with interlocking recessed and concave engaging portions 21 that engage with each other. This allows the first member 25 and the second member 26 to maintain their assembled state. The interlocking and concave engaging portion 21 includes a recess 21a and a projection 21b corresponding to the recess 21a. In this embodiment, the projection 21b is formed on the end face (first end face 25a) of the first member 25, and the recess 21a is formed on the end face (second end face 26a) of the second member 26. In this embodiment, the projection 21b is a projection that extends in the longitudinal direction of the guide member 20. Also, in this embodiment, the recess 21a is a groove that extends in the longitudinal direction of the guide member 20. Alternatively, the projection 21b may be a plurality of projections that are aligned and spaced apart from each other in the longitudinal direction of the guide member 20. Also, the recess 21a may be a plurality of recesses 21a that are aligned and spaced apart from each other in the longitudinal direction of the guide member 20. Alternatively, in this embodiment, the end face (first end face 25a) of the first member 25 may have a recess 21a and a projection 21b formed thereon, and the end face (second end face 26a) of the second member 26 may have projections 21b and recesses 21a corresponding to the recesses 21a and projections 21b formed on the first end face 25a, respectively. Alternatively, the first member 25 and the second member 26 may be combined by other methods, such as bonding with an adhesive or clamping with other members, to form a cylindrical guide member 20. 【0047】As shown in Figure 6(b), the dimensions of the interior (internal space 22) of the guide member 20 in the width direction perpendicular to the length direction are larger than the dimensions of the pull-out portion 14 (covered area 14a) in the width direction. Therefore, at least a portion of the inner wall surface of the guide member 20 and at least a portion of the surface (circumferential surface) of the pull-out portion 14 are spaced apart from each other. In other words, there is a gap between at least a portion of the inner wall surface of the guide member 20 and at least a portion of the surface (circumferential surface) of the pull-out portion 14. This makes it easier to attach the guide member 20 to the pull-out portion 14. Specifically, it makes it easier to fit or insert the guide member 20 into the pull-out portion 14. The dimensions of the internal space 22 in the width direction are the maximum dimensions of 22 in the width direction. For example, if the cross-sectional shape of the internal space 22 is elliptical, the dimensions of the internal space 22 in the width direction are the major axis of the ellipse. The dimensions of the pull-out portion 14 in the width direction are the maximum dimensions of the pull-out portion 14 in the width direction. In this embodiment, where the guide member 20 is cylindrical in shape, the dimension of the internal space 22 in the width direction is the inner diameter of the guide member 20. Also, as described above, in this embodiment, where the guide member 20 includes a first member 25 and a second member 26 (see Figure 8(a)), each of the first member 25 and the second member 26 has an opening in the direction that their respective end faces face. In this embodiment, the dimension of the internal space 22 in the width direction is the dimension of the opening of the first member 25 or the second member 26 in the width direction. 【0048】As shown in FIG. 6(b), in the present embodiment, a part (curved portion 14b) of the lead-out portion 14 disposed inside the bent portion 24 is in contact with a part on the inner bending side of the bent portion 24. Further, the part (curved portion 14b) is spaced apart from a part on the outer bending side of the bent portion 24. Specifically, a part on the inner bending side of the bent portion 24 is the inner wall on the inner bending side (inner bending side first wall portion 20d) of the bent portion 24, and a part on the outer bending side of the bent portion 24 is the inner wall on the outer bending side (outer bending side second wall portion 20e) of the bent portion 24. Thus, since the curved portion 14b is in contact with a part on the inner bending side of the bent portion 24, the curved portion 14b is bent while abutting or pressing against the inner wall on the inner bending side of the bent portion 24. On the other hand, since the curved portion 14b is spaced apart from the inner wall on the outer bending side of the bent portion 24, it is easy to attach the curved portion 14b to the bent portion 24. In the present embodiment, the radius of curvature of the curved portion 14b is larger than the radius of curvature of the inner wall on the inner bending side of the bent portion 24. Thereby, the curved portion 14b can be brought into contact with the inner wall on the inner bending side of the bent portion 24. Further, in the present embodiment, the radius of curvature of the curved portion 14b is larger than the radius of curvature of the inner wall on the outer bending side of the bent portion 24. Thereby, the curved portion 14b is spaced apart from the inner wall on the outer bending side of the bent portion 24. Instead of the present embodiment, the curved portion 14b may be spaced apart from a part on the inner bending side of the bent portion 24. Further, the curved portion 14b may be in contact with a part on the outer bending side of the bent portion 24. 【0049】As shown in Figure 6(b), in this embodiment, a portion of the extension portion 14 adjacent to the curved portion 14b (adjacent portion 14c) at either the tip or base end in the extending direction of the extension portion 14 is in contact with a region (adjacent region 23) of the inner wall of the guide member 20 that is adjacent to a portion of the inner wall on the outer bending side of the bent portion 24 in the extending direction (length direction) of the guide member 20. Here, the adjacent region 23 is a portion of the inner wall of a straight portion adjacent to the bent portion 24, while in the axial direction it is adjacent to the inner wall on the outer bending side of the bent portion 24 (outer bending side second wall portion 20e). Therefore, the adjacent region 23 (adjacent region 23a and adjacent region 23b) can be described as "the inner wall on the outer bending side of a portion of the length region adjacent to the bent portion 24 (a portion of the length region of a straight line)". More specifically, as will be described later, in this embodiment the guide member 20 has a first bent portion 24a and a second bent portion 24b that bend in opposite directions to each other. The adjacent portion 14c1, which is a portion of the length adjacent to the base end side of the curved portion 14b (first curved portion 14b1) housed in the first curved portion 24a, is in contact with the adjacent region 23a, which is a region adjacent to the base end side of a portion of the outer bend side of the first curved portion 24a (outer bend side second wall portion 20e). Similarly, the adjacent portion 14c2, which is a portion of the length adjacent to the tip side of the curved portion 14b (second curved portion 14b2) housed in the second curved portion 24b, is in contact with the adjacent region 23b, which is a region adjacent to the tip side of a portion of the outer bend side of the second curved portion 24b (outer bend side second wall portion 20e). Thus, the pull-out portion 14, which is curved in multiple stages (specifically two stages), is in contact with the inner wall (inner bend side first wall portion 20d) on the inner bend side of each curved portion 24 and the inner wall (adjacent region 23) on the outer bend side of a portion of the length adjacent to the curved portion 24 (a linear portion of the length). More specifically, the pull-out section 14, which has multiple curved sections 14b, is in contact with the first wall section 20d on the inner bending side of each bent section 24, and with an adjacent region 23 adjacent to the inner wall of the bent section 24 on the distal side (base end side or tip end side) away from the multiple curved sections 14b (bent section 24). As a result, the pull-out section 14 is positioned inside the two-stage bent guide member 20 so as to be in pressure contact with the inner wall of the guide member 20.Specifically, the pull-out portion 14 is pressed against the inner walls of the inner bends of the two bent portions 24 and the adjacent regions 23a and 23b by the elastic restoring force of the pull-out portion 14 itself. In this way, because the pull-out portion 14 is pressed against the inner wall of the guide member 20 and positioned inside the guide member 20, displacement of the pull-out portion 14 in the direction of extension of the guide member 20 within the guide member 20 is suppressed. Furthermore, as described above, because the pull-out portion 14 is pressed against the inner wall of the guide member 20, the shape of the pull-out portion 14 is better maintained. 【0050】As shown in Figure 6(a), in this embodiment, the guide member 20 has two bent portions 24 (a first bent portion 24a and a second bent portion 24b) in the length region between the base end and the tip end. Specifically, the first bent portion 24a and the second bent portion 24b are bent on the same plane (a virtual plane along the cross-section in Figure 6(a)). Furthermore, the first bent portion 24a and the second bent portion 24b are bent so as to protrude in opposite directions. That is, in Figure 6(a), the first bent portion 24a is bent so as to protrude to the lower left in the figure, and the second bent portion 24b is bent so as to protrude to the upper right in the figure. The bending angle of the bent portions 24 in this embodiment is approximately 90 degrees. The first length region 20a, which is the length region of the guide member 20 from the base end to the first bent portion 24a, extends in a first direction along the mounting surface. The second length region 20b of the guide member 20, which is the length region from the first bent portion 24a to the second bent portion 24b, extends in a direction intersecting the first direction. The third length region 20c of the guide member 20, which is the length region from the second bent portion 24b to the tip, extends in the first direction. In this embodiment, the first direction is the lateral direction (particularly the front-to-back direction). This first direction coincides with the pulling-out direction of the pull-out portion 14. The extending direction of the second length region 20b may be a direction perpendicular to the first direction (up-down direction or left-to-right direction), or it may be a direction inclined with respect to the direction perpendicular to the first direction. As described above, because the guide member 20 has a zigzag shape (approximately a Z shape), the tip of the pull-out portion 14 can be positioned and maintained at a desired position in the up-down and lateral directions. That is, because the second length region 20b extends in a direction having a vertical component, the tip of the pull-out portion 14 can be positioned at a desired position in the up-down direction. Furthermore, because the second length region 20b extends in a direction having a left-right component, the tip of the pull-out portion 14 can be positioned at a desired location in the left-right direction. Also, because the tip of the guide member 20 (third length region 20c) extends in the lateral direction, it is easy to place on the connection target 70 and easy to connect to the connection target 70. In this embodiment, the first bent portion 24a is bent upward from the first length region 20a to the second length region 20b.Alternatively, the first bent portion 24a may be bent downward, to the right, to the left, or diagonally from the first length region 20a to the second length region 20b. 【0051】 In this embodiment, the dimension of the first length region 20a in the longitudinal direction (the direction in which the guide member 20 extends) is larger than the dimension of the third length region 20c in the longitudinal direction. This makes it easier to attach the pull-out portion 14 to the guide member 20 having the bent portion 24. Because the first length region 20a is long, the pull-out portion 14 can be curved at a position away from the coil portion 12 or case 30, and the guide member 20 (especially the bent portion 24) can be attached to the pull-out portion 14. As a result, the worker's hand or jig is less likely to interfere with the coil portion 12 or case 30. This makes it easier to attach the guide member 20 to the pull-out portion 14. Alternatively, the dimension of the first length region 20a in the longitudinal direction may be smaller than the dimension of the third length region 20c in the longitudinal direction. This would cause the second length region 20b to be located closer to the base end of the guide member 20. As a result, the center of gravity of the guide member 20 is shifted towards the base end of the guide member 20, which prevents the pull-out portion 14 from unexpectedly breaking at the base end due to the weight of the guide member 20. 【0052】As shown in Figure 6(c), in this embodiment, one end (base end) of the guide member 20 is spaced apart from the case 30 (the outer wall surface of the side portion 30b). In other words, a portion of the length region of the pull-out section 14 that extends to the outside of the case 30 is exposed from the guide member 20. The distance D1 between the base end of the guide member 20 and the case 30 is smaller than the dimensions of the pull-out section 14 in the width direction perpendicular to the length direction. Specifically, the distance D1 is the distance between the base end of the guide member 20 and the side portion 30b (its outer wall surface) of the case 30 in the lateral direction (the direction in which the pull-out section 14 is pulled out). In this embodiment, the distance D1 is smaller than the dimensions of the pull-out section 14 in the vertical direction. Because the above-mentioned separation distance D1 is less than or equal to the width dimension of the pull-out portion 14, even if the guide member 20 is not supported by the case 30 or the like, the pull-out portion 14 is prevented from unexpectedly bending on the base end side of the guide member 20. As a result, the posture of the guide member 20 (a state in which a part of the base end side of the guide member 20 extends laterally) is maintained, and the tip of the pull-out portion 14 can be kept in the desired position. Alternatively, the separation distance D1 may be greater than the dimension of the pull-out portion 14 in the width direction. This allows the pull-out portion 14 to be deliberately bent on the base end side of the guide member 20. This makes it possible to reduce the dimensions of the coil component 1 in the front-rear direction and reduce the overall envelope volume of the coil component 1. 【0053】As shown in Figure 6(c), in this embodiment, there is a gap between the inner wall surface 30d defining the through hole 30c and the pull-out portion 14 (its circumferential surface). That is, in the radial direction of the pull-out portion 14, the inner wall surface 30d of the through hole 30c is spaced apart from the circumferential surface of the pull-out portion 14. In this embodiment, the entire inner wall surface 30d of the through hole 30c is spaced apart from the circumferential surface of the pull-out portion 14. Alternatively, a part of the inner wall surface 30d of the through hole 30c may be in contact with the circumferential surface of the pull-out portion 14, and another part may be spaced apart from the circumferential surface of the pull-out portion 14. In addition to the main body portion 51 described above, the resin material 50 includes a protruding portion 52 that protrudes from the main body portion 51 in the direction of penetration through the through hole 30c. The protruding portion 52 protrudes from the side surface of the main body portion 51 toward the inside of the through hole 30c (forward). The protruding portion 52 is positioned in the gap between the inner wall surface 30d and the pull-out portion 14 and covers at least a part of the surface (circumferential surface) of the pull-out portion 14. That is, in the radial direction of the pull-out portion 14, the protruding portion 52 overlaps with the circumferential surface of the pull-out portion 14. In this embodiment, the protruding portion 52 covers the circumferential surface of the pull-out portion 14 so as to surround the pull-out portion 14 which is positioned inside the through hole 30c. Alternatively, the protruding portion 52 may cover only a part of the upper, lower, or lateral side of the pull-out portion 14. With the above configuration, compared to the case in which the pull-out portion 14 is pressed into the through hole 30c, the risk of the pull-out portion 14 unexpectedly breaking sharply near the outer wall surface of the case 30 due to the load of the guide member 20 or the weight of the pull-out portion 14 is suppressed. Specifically, because a resin material 50 (protruding portion 52) that is more flexible than the case 30 is positioned between the inner wall surface 30d of the through hole 30c and the circumferential surface of the pull-out portion 14, the load of the guide member 20 or the weight of the pull-out portion 14 is less likely to concentrate near the outer wall surface of the case 30 in the pull-out portion 14. In other words, the load of the guide member 20 or the weight of the pull-out portion 14 is distributed over a certain length region located inside the through hole 30c in the pull-out portion 14. As a result, the pull-out portion 14 is less likely to break sharply near the outer wall surface of the case 30. 【0054】 (Guide Member) The guide member 20 of this embodiment may be provided without including the coil 10, etc. For example, the guide member 20 may be provided on its own for attachment to the lead wire of the coil component 1, which is provided via a different route than the guide member 20. 【0055】 A guide member 20, provided without the coil 10, etc., will now be described. The guide member 20 is a member that is attached to the lead wires of the coil 10. The guide member is formed in a cylindrical shape having an internal space 22 that extends in the longitudinal direction. As described above, the guide member 20 has a first member 25 and a second member 26. Each of the first member 25 and the second member 26 has an end face (first end face 25a or second end face 26a) that is along the longitudinal direction and extends in that longitudinal direction. The guide member 20 is formed in a cylindrical shape by combining the first member 25 and the second member 26 such that the end face of the first member 25 (first end face 25a) and the end face of the second member 26 (second end face 26a) face each other. 【0056】 <Second Embodiment> Figure 9 is a longitudinal cross-sectional view showing an example of a coil component 1 according to this embodiment. First, an overview of the coil component 1 of this embodiment will be described. 【0057】 In the coil component 1 of this embodiment, similar to the first embodiment, the guide member 20 covers at least a portion of the surface of the pull-out portion 14. The coil component 1 of this embodiment differs from the first embodiment in that the guide member 20 is attached to the case 30 by fitting one end (base end) of the guide member 20 into the through hole 30c of the case 30. 【0058】Details of the coil component of this embodiment will now be described. As described in the first embodiment, the coil component 1 further includes a case 30. The case 30 houses the coil portion 12 inside and is a separate component from the guide member 20. In the case 30, a through hole 30c is formed in the side portion 30b that covers the side surface of the coil portion 12, and penetrates through in the thickness direction. The pull-out portion 14 is pulled out from the coil portion 12 housed inside the case 30 through the through hole 30c to the outside of the case 30. As shown in Figure 9, in this embodiment, one end (base end) of the guide member 20 covers the periphery of the pull-out portion 14 and is fitted into the through hole 30c. This allows the base end of the pull-out portion 14 to be protected by the guide member 20. Furthermore, by fitting the base end of the guide member 20 into the through hole 30c, the guide member 20 can be supported by the case 30. 【0059】 Furthermore, in this embodiment, the guide member 20 is inserted into the through hole 30c through which the pull-out portion 14 passes in the case 30. That is, the guide member 20 is attached to the pull-out portion 14, while also being attached to the case 30. On the other hand, since the part of the case 30 to which the guide member 20 is attached is the through hole 30c through which the pull-out portion 14 is pulled out, it is less likely that a special structure will be required in the case 30 to attach the guide member 20. This increases the design freedom of the case 30, and consequently, the design freedom of the coil component 1. 【0060】When the base end of the guide member 20 is said to be fitted into the through hole 30c, it means that the base end of the guide member 20 is positioned inside the through hole 30c. More specifically, the base end of the guide member 20 is positioned inside the through hole 30c, and the pull-out portion 14 is positioned inside the guide member 20 which is positioned inside the through hole 30c. In this embodiment, the diameter of the base end of the guide member 20 is the same as or larger than the inner diameter of the through hole 30c. As a result, the circumferential surface of the base end of the guide member 20 abuts against or presses against the inner wall surface 30d of the through hole 30c. In other words, the base end of the guide member 20 is inserted into or press-fitted into the through hole 30c. In this embodiment, the diameter of the base end of the guide member 20 may be smaller than the inner diameter of the through hole 30c, and the base end of the guide member 20 may be loosely inserted into the through hole 30c. In this case, it is preferable that the gap between the base end of the guide member 20 and the inner wall surface of the through hole 30c is filled with a material such as an adhesive. 【0061】 In this embodiment, the base end of the guide member 20 is inserted into the through hole 30c up to the middle in the depth direction (front-to-back direction). That is, the base end of the guide member 20 is located on the outside side (front end side) of the case 30, relative to the inner wall surface of the side portion 30b. More specifically, in the through hole 30c in this embodiment, a portion of the outside side of the case 30 (large diameter portion 30c1) is large in diameter, and a portion of the inside side of the case 30 (small diameter portion 30c2) is smaller in diameter than the portion on the outside side. The inner diameter of the small diameter portion 30c2 is the same as or greater than that of the pull-out portion 14, and smaller than the outer diameter of the guide member 20. As a result, the base end of the guide member 20 is inserted only on the outside side of the case 30 in the through hole 30c. Alternatively, the diameter of the through hole 30c may be uniform. In this case, the base end of the guide member 20 may be inserted to the middle of the through hole 30c in the depth direction of the through hole 30c, or it may be inserted all the way to the back of the through hole 30c. That is, the base end of the guide member 20 may be inserted until it reaches the inner wall surface of the side portion 30b. 【0062】It should be noted that the present invention is not limited to the embodiments described above, and includes various modifications, improvements, and other forms as long as the objectives of the present invention are achieved. The following modifications can be combined as appropriate. 【0063】 In the embodiments described above, the case in which the guide member 20 covers substantially the entire length of the pull-out section 14 (particularly the length region of the pull-out section 14 that extends outside the case 30) has been described, but the present invention is not limited to this. For example, the guide member 20 may be an L-shaped member that locally covers only the curved section 14b. If the pull-out section 14 has a plurality of curved sections 14b, the guide member 20 may be attached to each of the plurality of curved sections 14b. That is, the guide member 20 may be composed of a plurality of members. Alternatively, the guide member 20 may be a straight member that covers only a portion of the length region of the pull-out section 14. Specifically, only the portion of the pull-out section 14 that is to be held in a straight line may be held by the straight guide member 20. In this case, the portion of the pull-out section 14 whose shape is not held by the straight guide member 20 can be easily bent. This makes it easy to bend the pull-out section 14 at a desired location. 【0064】 In the above-described embodiment, the case in which the guide member 20 is Z-shaped was explained, but this embodiment is not limited to this. For example, the guide member 20 may be a straight member that extends diagonally from the through hole 30c of the case 30 to the terminal 60. Also, in the above-described embodiment, the case in which the bending angle of the bent portion 24 is approximately 90 degrees was explained, but the bending angle of the bent portion 24 may be obtuse or acute. 【0065】In the above-described embodiment, the guide member 20 was described as having a cylindrical shape, but it is not limited to this. For example, as shown in Figures 10(a) and 10(b), the guide member 20 may be composed of a single member with an open annular (C-shaped) cross-section. In this case, it is preferable that the width of the open annular portion of the guide member 20 (the distance between the ends of the C-shape) is smaller than the diameter of the pull-out portion 14. This allows the pull-out portion 14 to be press-fitted into the open annular portion of the guide member 20 and attached to the pull-out portion 14. Furthermore, after the pull-out portion 14 is press-fitted into the guide member 20, the pull-out portion 14 is less likely to come off the guide member 20. Also, as shown in Figure 10(c), the guide member 20 may be a member that opens to the side and has a locking portion 27 (locking claw) in the opening. 【0066】 In the embodiment described above, the coil component 1 does not need to have a case 30. In this case, the lead-out portion 14 extends from the circumferential surface of the coil portion 12 to the outside of the coil portion 12. 【0067】The above embodiments encompass the following technical concepts: (1) A coil component comprising a coil portion in which a linear member is formed in a spiral shape and a lead portion which is one end of the linear member extending from the coil portion, and a guide member attached to the lead portion, wherein the guide member has a bending rigidity greater than that of the lead portion, and the guide member extends along at least a portion of the length region of the lead portion and covers at least a portion of the surface of the length region. (2) The coil component according to (1), wherein the guide member comprises a first member and a second member that extend in the length direction having end faces along the length direction in which the guide member extends, the guide member is formed in a cylindrical shape by combining the first member and the second member such that the end faces of the first member and the end faces of the second member face each other, and the lead portion is housed inside the guide member. (3) The coil component according to (2), wherein the pull-out portion has a curved portion that is more curved than other parts of the length region, the first member and the second member are formed along the curvature direction of the curved portion, the end face of the first member and the end face of the second member are along a plane including the curvature direction of the curved portion, and the curved portion is located inside the cylindrical shape formed by combining the first member and the second member. (4) The coil component according to (2) or (3), wherein the end faces of the first member and the second member each have interlocking protrusions and recesses that engage with each other. (5) The coil component according to any one of (2) to (4), wherein the internal dimensions of the guide member in the width direction perpendicular to the length direction are greater than the dimensions of the pull-out portion in the width direction. (6) The coil component according to any one of (2) to (5), wherein the guide member has a bent portion which is a bent part, and a portion of the pull-out portion located inside the bent portion is in contact with a portion on the inner bending side of the bent portion and is spaced apart from a portion on the outer bending side of the bent portion. (6-1) The coil component according to (6), wherein the radius of curvature in the curved portion is greater than the radius of curvature of the inner wall on the inner bending side of the bent portion, and the radius of curvature in the curved portion is greater than the radius of curvature of the inner wall on the outer bending side of the bent portion.(6-2) The coil component according to (6), wherein the guide member extends from a base end, which is one end in the longitudinal direction close to the coil, to a tip end, which is one end in the longitudinal direction opposite to the base end, and has two bent portions in the longitudinal region between the base end and the tip end, and the adjacent portion adjacent to the base end side of the curved portion housed in the first bent portion in the pull-out portion is in contact with an adjacent region adjacent to the base end side of a part of the outer bend side of the first bent portion in the longitudinal direction, and the adjacent portion adjacent to the tip side of the curved portion housed in the second bent portion in the pull-out portion is in contact with an adjacent region adjacent to the tip side of a part of the outer bend side of the second bent portion in the longitudinal direction. (7) The coil component according to any one of (2) to (6), wherein the coil component has a mounting surface on which the coil component can be mounted, the guide member extends from a base end which is one end adjacent to the coil in the longitudinal direction to a tip end which is one end opposite to the base end in the longitudinal direction, and has two bent portions which are a part that is bent in the length region between the base end and the tip, the first length region of the guide member which is the length region from the base end to the first bent portion extends in a first direction along the mounting surface, the second length region of the guide member which is the length region from the first bent portion to the second bent portion extends in a direction intersecting the first direction, and the third length region of the guide member which is the length region from the second bent portion to the tip extends in the first direction. (7-1) The coil component according to (7), wherein the dimension of the first length region in the longitudinal direction is greater than the dimension of the third length region in the longitudinal direction. (8) The coil component according to any one of (2) to (7), further comprising a case which houses the coil portion inside and is a separate component from the guide member, the pull-out portion which is pulled out to the outside of the case, one end of the guide member which is spaced apart from the case, and the distance between the one end of the guide member and the case which is smaller than the dimension of the pull-out portion in the width direction which is perpendicular to the length direction.(9) The coil component according to (8), wherein the side portion covering the side of the coil portion in the case has a through hole formed therethrough in the thickness direction, the pull-out portion is pulled out from the coil portion housed inside the case through the through hole to the outside of the case, there is a gap between the inner wall surface defining the through hole and the pull-out portion, the coil component further comprises a resin material disposed inside the case, the resin material includes a main body disposed between the side portion and the coil portion, and a protruding portion protruding from the main body in the direction of penetration of the through hole, the protruding portion is disposed in the gap and covers at least a part of the surface of the pull-out portion. (10) The coil component according to (2), further comprising a case which houses the coil portion inside and is a separate member from the guide member, wherein a through hole extending in the thickness direction is formed in the side portion of the case which covers the side of the coil portion, the pull-out portion is pulled out from the coil portion housed inside the case through the through hole to the outside of the case, and one end of the guide member covers the periphery of the pull-out portion and is fitted into the through hole. (11) A guide member attached to the lead wire of a coil, which is formed in a cylindrical shape having an internal space extending in the longitudinal direction, and includes a first member and a second member which extend in the longitudinal direction and have end faces along the longitudinal direction, wherein the first member and the second member are combined to form the cylindrical shape such that the end face of the first member and the end face of the second member face each other. (1-1) The coil component according to any one of (1) to (10), wherein the guide member is a long member which extends in the longitudinal direction with the extension direction of the pull-out portion as the longitudinal direction. (1-2) The coil component according to any one of (1) to (10), wherein the guide member is a long member that extends in the longitudinal direction with the extension direction of the pull-out portion as the longitudinal direction, the pull-out portion has a curved portion that is curved more than other parts of length, the curved portion is curved in the direction of curvature, and a part of the pull-out portion that covers the surface of the curved portion is a bent portion, and the bent portion is bent along the direction of curvature.(1-3) The coil component according to any one of (1) to (10), wherein the guide member is a long member that extends in the longitudinal direction with the extension direction of the pull-out portion as the longitudinal direction, the guide member has a bent portion which is a bent part, two adjacent partial length regions on either side of the bent portion extend in different directions, the two partial length regions are adjacent to the bent portion at one end of each of the two partial length regions, and the two partial length regions are spaced apart from each other at the center of each of the two partial length regions. (1-4) The coil component according to any one of (1) to (10), wherein the coil component further has a case which is a separate member from the guide member and houses the coil portion inside, the entire guide member is positioned outside the case beyond the inner wall surface of the side portion of the case. (1-5) The coil component according to any one of (1) to (10), further comprising a case which houses the coil portion inside and is a separate member from the guide member, wherein the entire guide member is positioned outside the case beyond the outer wall surface of the side portion of the case. (1-6) The coil component according to any one of (1) to (10), wherein the pull-out portion includes a curved portion which is curved more than other parts of the length region of the pull-out portion, and the guide member which houses the curved portion inside and extends in the direction of the extension of the curved portion. 【0068】1 Coil component 10 Coil 12 Coil section 13 Bobbin 14 Lead-out section 14a Covered area 14b Curved section 14b1 First curved section 14b2 Second curved section 14c, 14c1, 14c2 Adjacent section 16 Linear member 20 Guide member 20a First length area 20b Second length area 20c Third length area 20d First wall section on inner bend 20e Second wall section on outer bend 21 Concave and concave engagement section 21a Recess 21b Protrusion 22 Internal space 23, 23a, 23b Adjacent area 24 Bent section 24a First bend section 24b Second bend section 25 First member 25a First end face 26 Second member 26a Second end face 27 Locking section 30 Case 30a Bottom surface 30b Side surface 30c Through hole 30c1 Large diameter section 30c2 Small diameter section 30d Inner wall surface 30e Bottom plate 30f Holder 31 Case body 32 Notch 40 Core 41 First core 42 Second core 50 Resin material 51 Main body section 52 Protruding section 60 Terminal 62 Connection surface 70 Connection target

Claims

1. A coil component comprising: a coil portion in which a linear member is formed in a spiral shape and an extension portion which is one end of the linear member extending from the coil portion; and a guide member attached to the extension portion, wherein the guide member has a bending rigidity greater than that of the extension portion, and the guide member extends along at least a portion of the length of the extension portion and covers at least a portion of the surface of the length of the extension portion.

2. The coil component according to claim 1, wherein the guide member includes a first member and a second member that extend in the longitudinal direction, each having an end face along the longitudinal direction in which the guide member extends, the guide member is formed in a cylindrical shape by combining the first member and the second member such that the end face of the first member and the end face of the second member face each other, and the pull-out portion is housed inside the guide member.

3. The coil component according to claim 2, wherein the extension portion has a curved portion that is more curved than other parts of its length, the first member and the second member are formed along the curvature direction of the curved portion, the end face of the first member and the end face of the second member are along a plane including the curvature direction of the curved portion, and the curved portion is disposed inside the cylindrical shape formed by the combination of the first member and the second member.

4. The coil component according to claim 2 or 3, wherein the end faces of the first member and the second member each have interlocking protrusions and recesses that engage with each other.

5. The coil component according to any one of claims 2 to 4, wherein the internal dimensions of the guide member in the width direction perpendicular to the length direction are greater than the dimensions of the pull-out portion in the width direction.

6. The coil component according to any one of claims 2 to 5, wherein the guide member has a bent portion which is a bent part, and a portion of the pull-out portion disposed inside the bent portion is in contact with a portion on the inner bend side of the bent portion and is separated from a portion on the outer bend side of the bent portion.

7. The coil component according to any one of claims 2 to 6, wherein the coil component has a mounting surface on which the coil component can be mounted, the guide member extends from a base end which is one end adjacent to the coil in the longitudinal direction to a tip end which is one end opposite to the base end in the longitudinal direction, and has two bent portions which are a part that is bent in the length region between the base end and the tip, the first length region of the guide member which is the length region from the base end to the first bent portion extends in a first direction along the mounting surface, the second length region of the guide member which is the length region from the first bent portion to the second bent portion extends in a direction intersecting the first direction, and the third length region of the guide member which is the length region from the second bent portion to the tip extends in the first direction.

8. The coil component according to any one of claims 2 to 7, further comprising a case that houses the coil portion internally and is a separate component from the guide member, the pull-out portion being pulled out to the outside of the case, one end of the guide member being spaced apart from the case, and the distance between the one end of the guide member and the case being smaller than the dimension of the pull-out portion in the width direction perpendicular to the length direction.

9. The coil component according to claim 8, wherein the side portion covering the side of the coil portion in the case has a through hole formed therethrough in the thickness direction, the pull-out portion is pulled out from the coil portion housed inside the case through the through hole to the outside of the case, there is a gap between the inner wall surface defining the through hole and the pull-out portion, the coil component further comprises a resin material disposed inside the case, the resin material includes a main body disposed between the side portion and the coil portion, and a protruding portion projecting from the main body in the direction of penetration of the through hole, the protruding portion is disposed in the gap and covers at least a part of the surface of the pull-out portion.

10. The coil component according to claim 2, further comprising a case which houses the coil portion inside and is a separate component from the guide member, wherein a through hole is formed in the side portion of the case that covers the side of the coil portion and penetrates in the thickness direction, the pull-out portion is pulled out from the coil portion housed inside the case through the through hole to the outside of the case, and one end of the guide member covers the periphery of the pull-out portion and is fitted into the through hole.

11. A guide member to be attached to the lead wire of a coil, which is formed in a cylindrical shape having an internal space extending in the longitudinal direction, and includes a first member and a second member having end faces along the longitudinal direction and extending in the longitudinal direction, wherein the first member and the second member are combined to form the cylindrical shape such that the end face of the first member and the end face of the second member face each other.

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