JP5598400B2 - Spacers, coils, coil components, and switching power supplies - Google Patents

Description

  The present invention relates to a spacer, a coil, a coil component, and a switching power supply device.

  In a switching power supply device incorporated in a vehicle battery charger or the like, a coil having a large number of turns is increasing for the purpose of improving an output current. On the other hand, for example, in Patent Document 1, a second winding portion serving as a third winding portion is provided between the first winding portion and the second winding portion constituted by the first plate-like conductive member. A coil is described in which windings for a total of three turns are formed by inserting a plate-like conductive member.

  Moreover, when using the coil which forms the coil winding of 2 turns or more as mentioned above, adjacent windings so that adjacent windings may not short-circuit among a plurality of windings A coil bobbin may be provided between the two. As such a coil bobbin, for example, Patent Document 2 describes a coil bobbin having a protrusion that protrudes outward from the outer peripheral surface of the main body while the main body is inserted inside the coil winding. ing.

JP 2005-228813 A JP 2005-217311 A

  However, in the above-mentioned Patent Document 1, since a member for preventing contact between adjacent windings is not provided, when the coil winding is deformed by vibration or impact, adjacent windings come into contact with each other and are short-circuited. There is a risk.

  On the other hand, even when the coil bobbin described in Patent Document 2 is applied to the coil described in Patent Document 1, only one protrusion is provided on the outer peripheral surface of the main body to avoid contact between the coil windings. It has been. Therefore, depending on the strength and direction of vibration or impact, it may be difficult to avoid contact between the coil windings with the protrusion of the coil bobbin. In addition, in order to avoid contact between coil windings, it is possible to sandwich an insulating member between adjacent coil windings, but in that case, the number of parts increases, so the assembly process The number will increase.

  The present invention has been made in view of the above, and a spacer that can improve the insulation of the coil winding without increasing the number of parts, a coil in which the coil winding is attached to the spacer, and the coil It is an object of the present invention to provide a coil component and a switching power supply device to which a core member is attached.

  In order to achieve the above-mentioned object, the spacer according to the present invention is an insulating 2 that is disposed oppositely across the axis and extends in the axial direction along the outer peripheral surface of the coil winding wound around the axis for one turn or more. Of the end portions of one side wall portion and the two side wall portions, the end portions in the same direction with respect to the coil winding are connected along the direction in which the axis extends, and a part of the coil winding is Two insulative connecting parts sandwiching from the direction and two insulative projecting parts protruding from the axial side surfaces of the two side wall parts to insulate between adjacent coil windings along the axial direction And.

  According to the spacer described above, when a coil winding is inserted into an area formed by two side wall portions and two connecting portions, the two side wall portions protrude inward from the axis-side surface. Since the two insulating protrusions are sandwiched between adjacent coil windings along the axial direction, the insulation of the coil windings is maintained even when vibration or the like occurs. . Further, since the projections are provided on each of the two side wall portions opposed to each other across the axis, it is possible to stably maintain the insulation of the coil winding as compared with the case where there is only one projection. it can. Thus, according to said spacer, the two protrusion parts of a spacer can improve the insulation of a coil winding, without increasing the number of components.

  Here, as a configuration that effectively exhibits the above-described operation, specifically, an aspect in which the two protrusions have the same position in the axial direction can be given.

  In addition, the two side wall portions, the two connecting portions, and the two protrusion portions have a shape and arrangement that are two-fold symmetric with respect to the axis, and are two-fold symmetric with respect to a line perpendicular to the axis. be able to.

  As described above, the shape and arrangement of each part constituting the spacer are two-fold symmetric with respect to the axis and two-fold symmetric with respect to a line perpendicular to the axis, so that the vertical and horizontal directions of the spacer are Even if it is a case where it replaces, since coil winding can be attached appropriately, workability at the time of attaching a spacer to coil winding is improved.

  Further, it further includes a guide portion for positioning with respect to a pair of magnetic core members that protrude outward from at least one of the two side wall portions or the two coupling portions and sandwich the coil winding from the axial direction. It is good.

  Thus, by having the guide part for positioning with respect to a pair of magnetic body core member, while positioning of a magnetic body core member becomes easy, it can prevent that a magnetic body core member moves by vibration etc. .

  The coil according to the present invention includes a coil winding wound around one or more turns around an axis and the spacer. In this case, it is possible to obtain a coil including a spacer with improved insulation of the coil winding without increasing the number of parts.

  Here, in the above coil, the coil winding is formed by connecting a plurality of plate-like windings along the axial direction. When viewed from the axial direction, the coil winding forms a substantially annular shape, There are two notches that are partly cut out in a straight line, and the distance between the two side walls is larger than the distance between the two notches. It can be set as the aspect smaller than the length of the longest straight line among the straight lines which connect the edge parts of the two notch parts.

  As described above, the coil winding includes two notches, and the distance between the two side walls of the spacer on the axial side surface is larger than the distance between the two notches, and the two opposing portions. When the coil winding is attached to the spacer, the notch portions of the coil winding are respectively connected to the side wall portion by being smaller than the length of the longest straight line connecting the ends of the notch portions. It can be attached in the opposite direction, and workability at the time of attaching the coil winding is improved. In addition, since the distance between the two side wall portions is smaller than the length of the longest straight line among the straight lines connecting the ends of the two notch portions facing each other, once the coil winding is attached to the spacer, It is possible to prevent the coil winding from rotating along the axis due to vibration or the like.

  In addition, a stopper portion is formed at a position in the spacer that is different from the projection on the surface on the axis side of the side wall, and abuts on the coil winding when the coil winding is inserted from a direction perpendicular to the axis. It can be set as the mode currently performed.

  And regarding the coil which consists of a coil winding wound around the spacer and the axis above by one turn, the coil winding is a coil winding with respect to the spacer from the direction perpendicular to the axis so that the axis coincides. It can be set as the aspect provided with the contact part which contact | abuts to a stopper part, when inserting.

  As described above, the stopper portion is provided on the axial side surface of the side wall portion of the spacer, and the contact portion that contacts the stopper portion is provided in the coil winding so that the coil winding can be moved from the direction perpendicular to the axial direction. When the spacer is inserted into the spacer, the stopper part and the contact part come into contact with each other, so that the coil winding rotates along the axis due to vibration or the like, and the axial deviation between the stopper part and the coil winding is more effective. Can be prevented. Further, in the process of manufacturing the coil, when the coil winding is inserted into the spacer, the stopper portion and the contact portion come into contact with each other, so that the positioning becomes easy and the workability in manufacturing is improved.

  A coil component according to the present invention includes the above-described coil and a pair of magnetic core members that sandwich the coil winding from the axial direction. In this case, it is possible to obtain a coil component including a spacer with improved insulation of the coil winding without increasing the number of components.

  In addition, a switching power supply device according to the present invention includes the coil component described above. In this case, it is possible to obtain a switching power supply device using a coil component configured to include a spacer with improved insulation of the coil winding without increasing the number of components.

  According to the present invention, the spacer that can improve the insulation of the coil winding without increasing the number of parts, the coil with the coil winding attached to the spacer, and the core member attached to the coil A coil component, a transformer, and a switching power supply device are provided.

It is a disassembled perspective view which shows the coil components which concern on this embodiment. It is a perspective view explaining the structure of the spacer which comprises the coil components of FIG. 1, a 1st coil winding, and the attachment method of a 1st coil winding. FIGS. 3A and 3B are diagrams illustrating the configuration of the spacer in FIG. 2, FIG. 3A is a plan view of the spacer, and FIG. 3B is a view taken along the arrow IIIB-IIIB in FIG. FIGS. 4A and 4B are diagrams illustrating the configuration of the first coil winding, FIG. 4A is a plan view of the first coil winding, and FIG. 4B is a bottom view of the first coil winding. It is a perspective view explaining the structure of the components which consist of a spacer and a 1st coil winding, and the attachment method of the 2nd coil winding to this spacer. It is VI-VI arrow line view of FIG. It is a figure explaining the structure of a 2nd coil winding, Drawing 7 (a) is a top view of the 2nd coil winding, and Drawing 7 (b) is a bottom view of the 2nd coil winding. It is a perspective view of the coil which attached the 2nd coil winding to the components which consist of a spacer and a 1st coil winding. It is VI-VI arrow line view of FIG. It is a circuit diagram of a switching power supply device. It is a perspective view of a switching power supply device. It is a perspective view explaining the modification of a spacer. It is a figure explaining the other modification of a spacer, and is a figure corresponding to the IIIB-IIIB arrow line view of FIG. It is a perspective view explaining the structure of the spacer which comprises the coil components which concern on a modification, and the structure of 1st coil winding, and the attachment method of 1st coil winding. FIG. 15A is a diagram for explaining the configuration of the spacer in FIG. 14, FIG. 15A is a plan view of the spacer, and FIG. 15B is a view in the direction of arrows XVB-XVB in FIG. 14. It is a figure explaining the structure of the 1st coil winding which concerns on a modification, Fig.16 (a) is a top view of a 1st coil winding, FIG.16 (b) is a bottom face of a 1st coil winding. FIG. It is a perspective view explaining the structure of the components which consist of a spacer and a 1st coil winding, and the attachment method of the 2nd coil winding to this spacer. It is a XVIII-XVIII arrow line view of FIG. It is a figure explaining the structure of a 2nd coil winding, Fig.19 (a) is a top view of a 2nd coil winding, FIG.19 (b) is a bottom view of a 2nd coil winding. It is a perspective view of the coil which attached the 2nd coil winding to the components which consist of a spacer and a 1st coil winding. It is a XXI-XXI arrow line view of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

(Outline of coil parts)
First, with reference to FIGS. 1-3, the structure of the spacer contained in the coil component which concerns on this embodiment is demonstrated. FIG. 1 is an exploded perspective view showing a coil component according to the present embodiment. FIG. 2 is a perspective view illustrating the configuration of the spacer and the first coil winding constituting the coil component of FIG. 1 and the method of attaching the first coil winding. 3 is a diagram for explaining the configuration of the spacer in FIG. 2, FIG. 3 (a) is a plan view of the spacer, and FIG. 3 (b) is a view taken in the direction of arrows IIIB-IIIB in FIG. The detailed configuration of the first coil winding will be described later.

  A coil component 1 shown in FIG. 1 is used for an inductance element, a switching power supply device, a noise filter, an inverter, and the like. The coil component 1 includes a coil 2 and a pair of magnetic core members 6A and 6B. The coil 2 includes a spacer 3, a first coil winding 4, and a second coil winding 5. Each of the first coil winding 4 and the second coil winding 5 has end-ring-like plate-like winding members arranged in parallel at an interval, so that they are in a predetermined winding direction along the axis A. These end portions are further connected to each other, so that one coil winding is formed. Such first coil winding 4 and second coil winding 5 are inserted inside the spacer 3. In the coil component 1 of the present embodiment, the case where the first coil winding 4 and the second coil winding 5 are made of winding members having the same thickness will be described.

  Hereinafter, each component constituting the coil component 1 will be described, and an assembling method of the coil component 1 will be described.

(Spacer)
First, the configuration of the spacer 3 will be described. As shown in FIGS. 2 and 3, the spacer 3 includes two side wall portions 31, 32 extending along the axis A direction (vertical direction in FIG. 2) of the first coil winding 4, and the side wall portions 31, 32. A connecting portion 33 that connects the end portions on the upper side in the drawing and a connecting portion 34 that connects the end portions on the lower side in the drawing of the side wall portions 31 and 32 are configured. The side wall parts 31 and 32 and the connection parts 33 and 34 are made of an insulating material. In FIG. 2, the axis A is shown for both the spacer 3 and the first coil winding 4, but in FIG. 2, the spacer 3 and the first coil winding 4 are shown separately. This is because it becomes coaxial when integrated.

  The side walls 31 and 32 of the spacer 3 are made of substantially flat and identical members, and are provided such that the longitudinal direction is the direction of the axis A of the first coil winding 4. More specifically, of the side walls 31, 32, the surface on the axis A side is flat, but the surface opposite to the surface on the axis A side forms an arc when viewed from the direction of the axis A. So bend gently. Moreover, the connection parts 33 and 34 are plate-shaped and formed of members having the same shape, and have ring shapes each having an opening 35 and 36 at the center. As shown in FIGS. 1 and 2, the openings 35 and 36 are formed when the first coil winding 4 and the second coil winding 5 are attached to the spacer 3. It is provided to communicate with the opening of the coil winding 5 and to allow the leg portion of the magnetic core member 6A to be inserted into this opening. The inner diameters of the openings 35 and 36 of the spacer 3 are smaller than the inner diameters of openings provided in a first coil winding 4 and a second coil winding 5 described later.

  In addition, guide portions 33A and 34A that protrude outward with respect to the axis A are integrally provided in the connecting portions 33 and 34 of the spacer 3. The guide portions 33A and 34A prevent the magnetic core 6A from moving due to vibration or the like when the magnetic core member 6A is attached to the coil 2. Details thereof will be described later.

  In addition, as shown in FIG. 3B, a region surrounded by the side wall portions 31 and 32 and the coupling portions 33 and 34 forms a substantially rectangular opening 39. At this time, it is preferable that the distance between the side wall portion 31 and the side wall portion 32 is substantially the same as the minimum diameter of the first coil winding 4 and the second coil winding 5 described later.

  Projections 37A, 37B, and 37C projecting in the direction in which the axis A extends are provided on the surface 31A on the axis A side (that is, the opening 39 side) of the side wall 31 of the spacer 3. Further, on the surface 32A on the axis A side of the side wall 32, projections 38A, 38B, and 38C that protrude in the direction in which the axis A extends are provided. The protrusions 37A, 37B, 37C and the protrusions 38A, 38B, 38C protrude from each other. Further, the protrusion 37A and the protrusion 38A have the same position in the direction of the axis A, and as shown in FIG. 3B, the protrusion 37A and the protrusion 38A are arranged to face each other. Similarly, the protrusion 37B and the protrusion 38B have the same position in the axis A direction, and the protrusion 37B and the protrusion 38B are arranged to face each other. Further, the protrusion 37C and the protrusion 38C have the same position in the direction of the axis A, and the protrusion 37C and the protrusion 38C are arranged to face each other. The distance connecting the tip of the projection 37A and the tip of the projection 38A, the distance connecting the tip of the projection 37B and the tip of the projection 38B, and the distance connecting the tip of the projection 37C and the tip of the projection 38C are as follows: These are made smaller than the outer diameters of the first coil winding 4 and the second coil winding 5, respectively. Thus, the protrusions 37A, 37B, 37C, 38A, 38B, and 38C are arranged such that when the first coil winding 4 and the second coil winding 5 are attached to the inside of the spacer 3, In addition to functioning as a winding guide for properly mounting at a predetermined position, it has a function of preventing contact and short circuit between coil windings after mounting. In the spacer 3 of the present embodiment, the six protrusions 37A, 37B, 37C, 38A, 38B, and 38C are provided as described above. More specifically, this is a configuration in which three sets of two protrusions (37A and 38A, 37B and 38B, and 37C and 38C) are provided.

  The position where the protrusion is provided can be changed as appropriate based on the shape of the coil winding or the like. However, in the spacer 3 of the present embodiment, the distance between the connecting portion 33 and the protrusions 37A and 38A is the second. Protrusions 37A and 38A are provided at positions where the thickness of the coil winding 5 is equal so that the positions in the direction of the axis A are equal. In addition, the protrusions 37C and 38C are provided at positions where the distance between the connecting portion 34 and the protrusions 37C and 38C is equal to the thickness of the first coil winding 4 so that the positions in the axis A direction are equal. ing. The distance between the projections 37A and 38A and the projections 37B and 38B is the thickness of the plate-like winding member that constitutes the first coil winding 4, and the projections 37C and 38C and the projection 37B. , 38B are provided with projections 37B, 38B so that the positions in the direction of the axis A are equal at a position where the distance between them and the thickness of the plate-like winding member constituting the second coil winding 5 is the same. ing. Here, since the first coil winding 4 and the second coil winding 5 are made of winding members having the same thickness, the distance between the connecting portion 33 and the protruding portions 37A and 38A, the protruding portion 37A. , 38A and the protrusions 37B and 38B, the distance between the protrusions 37B and 38B and the protrusions 37C and 3CC, and the distance between the protrusions 37C and 38C and the connecting part 34 are equalized. ing.

  Thus, the shape of the spacer 3 is twice symmetrical with respect to the axis A, and is twice symmetrical with respect to a line (straight line L1 in FIG. 3B) perpendicular to the axis A. Therefore, even when this spacer 3 is used with its orientations in the vertical and horizontal directions reversed, it has the same function as when it is used without being reversed.

  The protrusions 37A, 37B, 37C, 38A, 38B, and 38C are also made of an insulating material. As an insulating material constituting the spacer 3 including the protrusions 37A, 37B, 37C, 38A, 38B, and 38C, for example, PBT (Poly Butylene Terephthalate) resin, PPS (Poly Phenylene Sulfide) resin, etc. are heat resistant, It is preferably used because of its excellent properties such as chemical resistance, flame retardancy and dimensional stability.

(First coil winding)
Next, the first coil winding 4 will be described with reference to FIGS. FIG. 4 is a diagram illustrating the configuration of the first coil winding, FIG. 4 (a) is a plan view of the first coil winding, and FIG. 4 (b) is a bottom view of the first coil winding. FIG.

  As shown in FIGS. 2 and 4, the first coil winding 4 has a substantially annular shape and includes two end ring-shaped winding members 41 and 42 arranged in parallel with a predetermined winding. It is connected so as to be continuous in the direction. “Substantially annular” means that the outer periphery of a region of the coil winding in which the winding is formed (that is, the region excluding the terminal portion and the connecting portion) is substantially circular when viewed from the direction of the axis A. Or generally oval. The end ring-shaped winding members 41 and 42 have a so-called C-shape and have circular openings 401 and 402 in the center. The winding member 41 and the winding member 42 are overlapped so that the openings 401 and 402 communicate with each other. The winding member 41 is a 5/8 turn winding, and a gap 403 extending from the inner periphery to the outer periphery is provided between one end and the other end. The winding member 42 is a 7/8 turn winding, and a slit 404 extending from the inner periphery to the outer periphery is provided between one end and the other end.

  Further, a first terminal portion 43 that protrudes outward from the axis A of the opening 401 is integrally provided at one end portion of the winding member 41. The other end of the winding member 41 is connected to one end of the winding member 42 via a U-shaped connecting portion 44. A second terminal portion 45 that protrudes outward from the axis A of the opening 402 is integrally provided at the other end portion of the winding member 42. In the first coil winding 4 having the above-described configuration, the first terminal portion 43 is the starting end of the first coil winding 4, and the second terminal portion 45 is the end of the first coil winding 4. When power is input to the first terminal portion 43, the power flows in the order of the winding member 41, the connection portion 44, and the winding member 42, and is output from the second terminal portion 45.

  The first terminal portion 43 and the second terminal portion 45 are bent in steps so that the positions in the axis A direction are different from those of the winding members 41 and 43.

  Here, the outer periphery of the winding member 41 of the first coil winding 4 is provided with a cutout portion 46B in which a part of the outer periphery is cut out linearly. Similarly, notches 47A and 47B are also provided on the outer periphery of the winding member 42 by partially cutting away the outer periphery in a straight line. As shown in FIG. 4, the cutout portion 46 </ b> B provided in the winding member 41 and the cutout portion 47 </ b> B provided in the winding member 42 are positioned so as to overlap in plan view. The winding member 41 is not provided at the position corresponding to the notch 47A in the winding member 41, and therefore the notch corresponding to the notch 47A is not provided in the winding member 41. In addition, the notches 47A and 47B (46B) are provided at opposite positions across the axis A so that their end faces are parallel. In the first coil winding 4, the notches 46B, 47A, 47B are provided, so that the distance between the notches 47A and 47B (46B) is the minimum diameter of the winding member 42. It has become. That is, the distance between the notches 47A and 47B (46B) is the minimum diameter of the first coil winding 4.

  The first coil winding 4 having the above configuration can be formed by punching a single substrate having high electrical conductivity. More specifically, from a substrate such as a copper plate or an aluminum plate, the first terminal portion 43, the winding members 41 and 42 that are continuous to the first terminal portion 43, and the second terminal that is continuous to the winding member 42. The terminal portion 45 and the I-shaped connecting portion 44 that connects the winding members 41 and 42 are obtained by punching. Then, the winding members 41 and 42 are overlapped with a predetermined gap by bending the connection portion 44 into a U shape. Thereby, the first coil winding 4 made of a conductor plate is completed. In addition, the 1st coil winding 4 is not restricted to such a bending coil, For example, the coil member and the connection part may be screwed, and what was welded may be sufficient as it. Moreover, you may fix with a rivet.

(Attaching the first coil winding to the spacer)
Next, attachment of the first coil winding 4 to the spacer 3 will be described with reference to FIGS. FIG. 5 is a perspective view for explaining the configuration of a part composed of a spacer and a first coil winding and a method for attaching the second coil winding to the spacer. 6 is a view taken in the direction of arrows VI-VI in FIG.

  When attaching the first coil winding 4 to the spacer 3, as shown in FIG. 2, in the spacer 3, the openings surrounded by the side walls 31 and 32 and the connecting portions 33 and 34 (openings in FIG. 3B). 39), the first coil winding 4 is inserted from the front side of the figure. At this time, in the first coil winding 4, the direction in which the openings 35 and 36 of the spacer 3 communicate with the axis of the first coil winding 4, and the direction in which the inner surfaces of the side walls 31 and 32 extend. The cutout portions 46B, 47A, 47B of the first coil winding 4 are arranged in the direction along the direction. Then, the first coil winding 4 is inserted through the opening 39 until the inner surfaces of the side wall portions 31 and 32 (the surfaces 31A and 32A in FIG. 3B) and the notches 46B, 47A and 47B face each other. Here, the direction when inserting the first coil winding 4 is changed, for example, the inner surfaces of the side wall portions 31 and 32 (the surfaces 31A and 32A in FIG. 3B) and the cutout portions 46B, 47A and 47B. Even if it is attempted to insert the first coil winding 4 in such a direction as to cross each other, the distance between the side wall portions 31 and 32 is small compared to the diameter of the first coil winding 4. Cannot insert.

  At this time, since the first terminal portion 43 and the second terminal portion 45 of the first coil winding 4 are bent and the position in the direction of the axis A is different from the winding members 41 and 42, this The first terminal portion 43 and the second terminal portion 45 suppress the movement in the plane direction perpendicular to the axis A.

  Further, when the first coil winding 4 is attached to the spacer 3, the winding member 41 of the first coil winding 4 is fitted between the protrusions 37A, 38A and the protrusions 37B, 38B of the spacer 3. The first coil winding 4 is inserted so that the winding member 42 of the first coil winding 4 fits between the projections 37C and 38C of the spacer 3 and the connecting portion 34. Thereby, the movement of the first coil winding 4 in the vertical direction within the spacer 3 is suppressed.

  As described above, the component 7 including the spacer and the first coil winding is formed.

(Second coil winding)
Next, the second coil winding 5 will be described with reference to FIGS. FIG. 7 is a diagram for explaining the configuration of the second coil winding, FIG. 7A is a plan view of the second coil winding, and FIG. 7B is a bottom view of the second coil winding. FIG.

  As shown in FIGS. 5 and 7, the second coil winding 5 has a substantially annular shape and includes two end ring-shaped winding members 51 and 52 arranged in parallel with a predetermined winding. It is connected so as to be continuous in the direction. The end ring-shaped winding members 51 and 52 have a so-called C-shape and have circular openings 501 and 502 in the center. The winding member 51 and the winding member 52 are overlapped so that the openings 501 and 502 communicate with each other. Each of the winding member and the winding member 52 is a one-turn winding, and slits 503 and 504 extending from the inner periphery to the outer periphery are provided between one end and the other end.

  Furthermore, a first terminal portion 53 that protrudes outward from the axis A of the opening 501 is integrally provided at one end portion of the winding member 51. The other end of the winding member 51 is connected to one end of the winding member 52 via a U-shaped connection portion 54. A second terminal portion 55 that protrudes outward from the axis A of the opening 502 is integrally provided at the other end portion of the winding member 52.

  The first terminal portion 53 and the second terminal portion 55 are provided on the same surface as the winding members 51 and 53. That is, it is not a configuration in which the vicinity of the terminal portion is bent like the first coil winding 4.

  In the second coil winding 5 having the above-described configuration, the first terminal portion 53 is the start end of the second coil winding 5, and the second terminal portion 55 is the end of the second coil winding 5. When power is input to the first terminal portion 53, the power flows in the order of the winding member 51, the connection portion 54, and the winding member 52, and is output from the second terminal portion 55.

  Here, the outer periphery of the winding member 51 of the second coil winding 5 is provided with cutout portions 56A and 56B in which a part of the outer periphery is cut out linearly. Similarly, notches 57A and 57B are also provided on the outer periphery of the winding member 52 by partially cutting away the outer periphery in a straight line. As shown in FIG. 7, the cutout portion 56 </ b> A provided in the winding member 51 and the cutout portion 57 </ b> A provided in the winding member 52 are positioned so as to overlap in plan view. Similarly, the cutout portion 56B provided in the winding member 51 and the cutout portion 57B provided in the winding member 52 are positioned so as to overlap in plan view. Further, the notches 56A and 56B and 57A and 57B are provided at positions facing each other across the axis A so that their end faces are parallel to each other. And in this 2nd coil winding 5, since this notch part 56A, 56B, 57A, 57B is provided, distance between notch parts 56A and 56B (distance between 57A and 57B) ) Is the minimum diameter of the winding member 51 (52). That is, the distance between the notches 56A and 56B (the distance between 57A and 57B) is the minimum diameter of the second coil winding 5.

  The second coil winding 5 having the above configuration can be formed by punching a single substrate having high electrical conductivity. More specifically, from a substrate such as a copper plate or an aluminum plate, a first terminal portion 53, winding members 51, 52 that are continuous with the first terminal portion 53, and a second terminal that is continuous with the winding member 52. The terminal portion 55 and the I-shaped connecting portion 54 that connects the winding members 51 and 52 are obtained by punching. Then, the winding members 51 and 52 are overlapped with a predetermined gap by bending the connection portion 54 into a U shape. Thereby, the second coil winding 5 made of a conductor plate is completed. In addition, the 2nd coil winding 5 is not restricted to such a bending coil, For example, the coil member and the connection part may be screwed, and what was welded may be sufficient as it. Moreover, you may fix with a rivet.

(Attaching the second coil winding to the spacer)
Next, attachment of the second coil winding 5 to the component 7 composed of the spacer 3 and the first coil winding 4 will be described with reference to FIGS. FIG. 8 is a perspective view of a coil in which a second coil winding is attached to a component composed of a spacer and a first coil winding. FIG. 9 is a view taken in the direction of arrows VI-VI in FIG.

  When attaching the second coil winding 5 to the component 7, as shown in FIG. 5, in the spacer 3, the openings surrounded by the side walls 31, 32 and the connecting parts 33, 34 (openings in FIG. 3B). 39), the second coil winding 5 is inserted from the illustrated back side. That is, the second coil winding 5 is inserted into the opening from the side opposite to the first coil winding 4. At this time, in the second coil winding 5, the direction in which the openings 35 and 36 of the spacer 3 communicate with the axis of the second coil winding 5, and the direction in which the inner surfaces of the side walls 31 and 32 extend. The cutout portions 56A, 56B, 57A, and 57B of the second coil winding 5 are oriented along the direction. Then, the second coil winding 5 is inserted from the opening 39 until the inner surfaces of the side wall portions 31 and 32 (the surfaces 31A and 32A in FIG. 3B) and the notches 56A, 56B, 57A, and 57B face each other. . Here, the direction when inserting the second coil winding 5 is changed, for example, the inner surfaces of the side walls 31 and 32 (the surfaces 31A and 32A in FIG. 3B) and the notches 56A, 56B, 57A, Even if an attempt is made to insert the second coil winding 5 in a direction intersecting with 57B, the distance between the side wall portions 31 and 32 is smaller than the diameter of the second coil winding 5, and therefore the second coil winding 5 5 cannot be inserted.

  Further, when attaching the second coil winding 5 to the component 7, as shown in FIG. 9, the winding member 51 of the second coil winding 5 is connected to the protrusions 37 </ b> A and 38 </ b> A of the spacer 3 and the connecting portion 33. The second coil winding 5 is inserted so that the winding member 52 of the second coil winding 5 fits between the protrusions 37B and 38B of the spacer 3 and the protrusions 37C and 38C. . Thereby, the movement of the second coil winding 5 in the vertical direction within the spacer 3 is suppressed.

  Further, the protrusions 37 </ b> A and 38 </ b> A of the spacer 3 are interposed between the winding member 41 of the first coil winding 4 and the winding member 51 of the second coil winding 5. Accordingly, the protrusions 37A and 38A function as an insulating member that prevents the winding member 41 and the winding member 51 from coming into contact with each other. Similarly, the protrusions 37 </ b> B and 38 </ b> B of the spacer 3 are interposed between the winding member 51 of the second coil winding 5 and the winding member 42 of the first coil winding 4. Thus, the protrusions 37B and 38B function as an insulating member that prevents the winding member 51 and the winding member 42 from coming into contact with each other. Further, the protrusions 37 </ b> C and 38 </ b> C of the spacer 3 are interposed between the winding member 42 of the first coil winding 4 and the winding member 52 of the second coil winding 5. Accordingly, the protrusions 37C and 38C function as an insulating member that prevents the winding member 42 and the winding member 52 from contacting each other.

  And after inserting the 1st coil winding 4 and the 2nd coil winding 5 in the spacer 3, as shown in FIG. 8, the 1st terminal part 43 and the 2nd coil winding 5 of the 1st coil winding 4 are shown. The second terminal portion 55 is electrically connected by the screw 21. Thereby, the 1st coil winding 4 and the 2nd coil winding 5 function as a coil winding of a total of 3.5 turns. Specifically, when power is input from the second terminal portion 45 of the first coil winding 4, the power passes through the winding member 42, the connection portion 44, and the winding member 41, and the first terminal portion 43. The second terminal portion 55 of the second coil winding 5 that is electrically connected to the first terminal portion 43, passes through the winding member 52, the connection portion 54, and the winding member 51, and then passes through the first terminal portion 43. Is output from the first terminal portion 53. Further, the first terminal portion 43 of the first coil winding 4 and the second terminal portion 55 of the second coil winding 5 are fixed by the screw 21, thereby opening (opening 39 in FIG. 3B). The movement of the first coil winding 4 and the second coil winding 5 along the extending direction of the side wall portions 31 and 32 is suppressed. The first terminal portion 43 of the first coil winding 4 and the second terminal portion 55 of the second coil winding 5 may be connected by welding instead of screwing. Moreover, you may fix these with a rivet.

  In this way, the component 2, that is, the coil 2 including the spacer 3 and the first coil winding 4 and the second coil winding 5 is formed.

(Coil parts)
Next, returning to FIG. 1, the coil component 1 will be described. In this coil component 1, the coil 2 further includes a pair of magnetic core members 6A and 6B. The coil component 1 functions as, for example, a choke coil of a switching power supply device described later.

  As shown in FIG. 1, the magnetic core members 6 </ b> A and 6 </ b> B sandwich the coil 2 along the axis A passing through the openings of the spacer 3, the first coil winding 4, and the second coil winding 5 constituting the coil 2. Are arranged as follows.

  The magnetic core members 6A and 6B are so-called E-type core and I-type core obtained by compacting ferrite powder. More specifically, the magnetic core member 6A includes a flat plate-like base portion 60 having a longitudinal direction, a columnar main leg 61 protruding from the center of one main surface of the base portion 60, and the main leg 61. It consists of two outer legs 62 and 63 provided at the end of the base 60 with a sandwich. On the other hand, the magnetic core member 6B includes a flat base 65 having a longitudinal direction.

  The main leg 61 of the magnetic core member 6 is the opening of the coil 2, that is, the opening 35 of the connecting portion 33 of the spacer 3 shown in FIG. 9, the opening 501 of the winding member 51, the opening 401 of the winding member 41, the winding member. 52, the opening 402 of the winding member 42, and the opening 36 of the connecting portion 34 of the spacer 3 are inserted. At this time, as shown in FIG. 9, the diameters of the opening 35 of the connecting portion 33 of the spacer 3 and the opening 36 of the connecting portion 34 are the same as those of the openings 401, 402, 501, 502 of the winding members 41, 42, 51, 52. Since the opening 35 of the connecting portion 33 and the opening 36 of the connecting portion 34 are in contact with the main leg 61 of the magnetic core member 6A, the openings 401 of the winding members 41, 42, 51, and 52 are formed. , 402, 501 and 502 do not contact the main leg 61 of the magnetic core member 6A. Thus, the spacer 3 has a function as a bobbin that prevents the magnetic core member 6A, the first coil winding 4 and the second coil winding 5 from coming into contact with each other in the opening.

  Returning to FIG. 1, the outer legs 62 and 63 of the magnetic core member 6 </ b> A are magnetically aligned with the outer legs 62 and 63 of the magnetic core member 6 </ b> A along the outer circumferences of the first coil winding 4 and the coil winding 5. It arrange | positions so that the base 65 of the body core member 6B may contact | abut. At this time, since the side wall portions 31 and 32 of the spacer 3 are provided along the outer peripheral surfaces of the first coil winding 4 and the second coil winding 5, the side wall portions 31 and 32 are formed of the magnetic core member 6A. And a function as an insulating member for preventing the first coil winding 4 and the second coil winding 5 from contacting each other.

  Further, the connecting portions 33 and 34 of the spacer 3 are insulating members that prevent the coil windings from coming into contact with the magnetic core members 6A and 6B when the coil 2 is sandwiched between the pair of magnetic core members 6A and 6B. As a function.

  Further, guide portions 33A and 34A projecting outward are provided on the connecting portions 33 and 34 of the spacer 3, respectively. Since the guide portions 33A and 34A fix the outer legs 62 and 63, the magnetic core member 6A and Occurrence of misalignment in the width direction between the coil 2 and the coil 2 is suppressed. In addition, the shape of guide part 33A, 34A is not restricted above, It can change suitably according to the shape of a magnetic body core member. In addition, a guide portion may be provided on the side wall portions 31 and 32 of the spacer 3.

(Switching power supply)
Next, a switching power supply device in which the coil component 1 according to this embodiment is preferably used will be described. FIG. 10 is a circuit diagram of the switching power supply apparatus 100. FIG. 11 is a perspective view of the switching power supply device 100. The switching power supply device 100 according to the present embodiment functions as a DC-DC converter. For example, a high-voltage DC input voltage Vin supplied from a high-voltage battery or the like that stores a voltage of about 100 V to 500 V is used as a low-voltage DC output. The voltage is converted to voltage Vout and supplied to a low voltage battery or the like that stores a voltage of about 12 to 16V.

  As shown in FIG. 11, the switching power supply device 100 includes a base plate 101 on which an input smoothing capacitor (input filter) 130, a switching circuit 120, a main transformer 140, a rectifier circuit 150, A smoothing circuit 160 including a choke coil (coil component) 170 and an output smoothing capacitor 162 is fixed.

  More specifically, the switching power supply device 100 includes a switching circuit 120 and an input smoothing capacitor 130 provided between the primary high voltage line 121 and the primary low voltage line 122, and the primary side and secondary side. A main transformer 140 having transformer coil portions 141 and 142, a rectifier circuit 150 connected to the secondary transformer coil portion 142, and a smoothing circuit 160 connected to the rectifier circuit 150 are provided.

  The switching circuit 120 has a full-bridge circuit configuration including switching elements S1 to S4. The switching circuit 120 converts a DC input voltage Vin applied between the input terminals T1 and T2 into an input AC voltage, for example, according to a drive signal supplied from a drive circuit (not shown).

  The input smoothing capacitor 130 smoothes the DC input voltage Vin input from the input terminals T1 and T2. The main transformer 140 transforms the input AC voltage generated by the switching circuit 120 and outputs an output AC voltage. The turns ratio of the primary and secondary transformer coils 141 and 142 is appropriately set according to the transformation ratio. Here, the number of turns of the primary transformer coil part 141 is made larger than the number of turns of the secondary transformer coil part 142. The secondary transformer coil part 142 is a center tap type, and is led to the output terminal T3 via the connection part C and the output line LO.

  The rectifier circuit 150 is a single-phase full-wave rectifier type composed of rectifier diodes 151A and 151B. The cathodes of the rectifier diodes 151A and 151B are connected to the secondary transformer coil section 142, while the anode is connected to the ground line LG and led to the output terminal T4. Thereby, the rectifier circuit 150 individually rectifies each half-single wave period of the output AC voltage from the main transformer 140 to generate a DC voltage.

  The smoothing circuit 160 includes a choke coil 170 and an output smoothing capacitor 162. The choke coil 170 is inserted into the output line LO. The output smoothing capacitor 162 is connected between the choke coil 170 and the ground line LG in the output line LO. As a result, the smoothing circuit 160 smoothes the DC voltage rectified by the rectifying circuit 150 to generate the DC output voltage Vout, and supplies the DC output voltage Vout from the output terminals T3 and T4 to a low-voltage battery or the like.

  In the switching power supply device 100 configured as described above, the DC input voltage Vin supplied from the input terminals T1 and T2 is switched to generate an input AC voltage, and the primary transformer coil unit 141 of the main transformer 140 is generated. Supplied. Then, the generated input AC voltage is transformed and output from the secondary transformer coil unit 142 as an output AC voltage. The output AC voltage is rectified by the rectifier circuit 150 and smoothed by the smoothing circuit 160, and is output as the DC output voltage Vout from the output terminals T3 and T4.

  As described above, according to the spacer 3 according to the present embodiment, the first coil winding 4 and the inside of the rectangular region constituted by the two side wall portions 31 and 32 and the two connection portions 33 and 34 and When the second coil winding 5 is inserted, insulating protrusions 37A, 37B, 37C and 38A, 38B, which protrude inward from the axial side surfaces 31A, 32A of the two side wall portions 31, 32, respectively, 38C between winding members adjacent along the direction of the axis A (between the winding member 41 and the winding member 51, between the winding member 51 and the winding member 42, and with the winding member 42) Therefore, even if vibration or the like occurs, the insulation of the coil winding (winding member) is maintained. Further, since the projections 37A, 37B, 37C and 38A, 38B, 38C are provided on the two side wall portions 31, 32 facing each other across the axis A, there is only one projection (one of the projections). The insulation of the coil winding can be stably maintained as compared with the case where it is provided only on the side wall. As described above, according to the spacer 3 of the present embodiment, the set of three protrusions (37A and 38A, 37B and 38B, and 37C and 38C) of the spacer 3 can be used for the coil winding without increasing the number of components. Insulation can be improved.

  In the spacer 3 according to the above embodiment, the shape and arrangement of the side wall portions 31 and 32, the connecting portions 33 and 34, and the protrusion portions 37A, 37B, 37C, 38A, 38B, and 38C are symmetrical with respect to the axis A twice. There is also a two-fold symmetry with respect to a line L1 perpendicular to the axis A. Therefore, even when the vertical direction and the horizontal direction of the spacer 3 are switched, the coil winding can be appropriately attached, so that workability when the spacer is attached to the coil winding is improved.

  In addition, the spacer 3 according to the above embodiment has the guide portions 33A and 34A for positioning with respect to the pair of magnetic core members 6A and 6B, thereby facilitating the positioning of the magnetic core members 6A and 6B and vibration. Thus, the magnetic core members 6A and 6B can be prevented from moving.

  In the coil 2 according to the above embodiment, the first coil winding 4 and the second coil winding 5 are notched (46B, 47A, 47B, 56A, 56B, 57A) provided in parallel with the axis A therebetween. 57B), and the distance between the surfaces 31A and 32A on the axis A side of the two side wall portions 31 and 32 of the spacer 3 is larger than the distance between the two notch portions and is different from the notch portion. The diameters of the first coil winding 4 and the second coil winding 5 are smaller. Therefore, when the first coil winding 4 and the second coil winding 5 are attached to the spacer 3, the two cutout portions of the first coil winding 4 and the second coil winding 5 are the side wall portion 31, respectively. It is attached in the direction opposite to 32. And since the distance between the two side wall parts 31 and 32 is smaller than the diameter of the 1st coil winding 4 and the 2nd coil winding 5 in the position different from a notch part, once the 1st coil winding 4 and After the second coil winding 5 is attached to the spacer 3, it is possible to prevent the first coil winding 4 and the second coil winding 5 from rotating along the axis A due to vibration or the like.

  The coil component 1 according to the embodiment includes the coil 2 and a pair of magnetic core members 6A and 6B that sandwich the first coil winding 4 and the second coil winding 5 from the direction of the axis A. . Thereby, the coil component 1 comprised including the spacer 3 by which the insulation of the coil winding was improved, without increasing components can be obtained.

  In addition, the switching power supply device 100 according to the present invention uses the coil component 1 including the spacer 3 in which the insulation of the coil winding is improved without increasing the number of components. The switching power supply device 100 can be obtained.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment, A various change can be made.

  For example, the positions of the protrusions 37A, 37B, 37C, 38A, 38B, and 38C provided on the spacer 3 can be changed as appropriate. Further, the number of the protrusions 37A, 37B, 37C, 38A, 38B, 38C can be changed. It is only necessary that at least one protrusion is provided on each of the side walls 31 and 32. For example, only one protrusion is provided on one side wall, and a plurality of protrusions are provided on the other side wall. It may be done.

  In the above embodiment, the protrusions 37A and 38A, and 37B and 38B have the same positions in the direction of the axis A, but the protrusions provided on the side wall 31 and the side wall 32 are provided. The protruding portion may have a configuration in which positions in the axis A direction are different from each other. In the case of such a configuration, for example, one coil winding can be configured such that one protrusion is supported from above and the other protrusion is supported from below.

  The spacer 3 has other functions in addition to the side wall portions 31 and 32, the connecting portions 33 and 34, the projection portions 37A, 37B, 37C, 38A, 38B, and 38C, and the guide portions 33A and 34A shown in the above embodiment. It is good also as providing. FIG. 12 is a perspective view for explaining a modified example of the spacer 3. For example, like the spacer 3 shown in FIG. 12, the connection member 72 connected to the first terminal portion 53 of the second coil winding 5 via the screw 75 in the first terminal portion 71 is the spacer 3. When it is attached so as to pass through the upper surface of the connecting portion 33, projections 39 </ b> A and 39 </ b> B for positioning the connecting member 72 can be provided according to the shape of the connecting member 72. In this case, the connection member 72 attached to the upper surface of the connecting portion 33 is restrained from moving due to vibration or the like by the protrusions 39A and 39B. Needless to say, the position and shape of the protrusions 39A and 39B can be appropriately changed.

  FIG. 13 is a view for explaining another modified example of the spacer 3, and corresponds to the view taken along the arrow IIIB-IIIB in FIG. Like the spacer 3 shown in FIG. 13, flanges 39 </ b> C and 39 </ b> D that extend upward from the side walls 31 and 32 and have tips that are bent in a hook shape are provided above the connection part 33, and are connected to the flanges 39 </ b> C and 39 </ b> D It is also possible to adopt a configuration in which coil windings are also placed between the unit 33.

  Moreover, although the said embodiment demonstrated the case where the connection parts 33 and 34 of the spacer 3 were ring-shaped, the connection parts 33 and 34 should just connect the edge parts of the side wall parts 31 and 32, and the shape Is not limited to the above. The “end portion” here refers to the vicinity of the end edges of the side wall portions 31 and 32. That is, the side wall parts 31 and 32 may be connected by the connection parts 33 and 34 inside the end edges of the side wall parts 31 and 32.

  Moreover, in the said embodiment, ie, the two notch parts provided in the 1st coil winding 4, and the two notch parts provided in the 2nd coil winding 5, respectively, Although a description has been given of a configuration that is a straight line parallel to each other, the two notch portions facing each other do not have to be parallel to each other, and for example, the notch portions may be provided in a square shape.

  Moreover, in the said embodiment, the distance between the side wall part 31 and the side wall part 32 is the minimum diameter of the 1st coil winding 4 and the 2nd coil winding 5 (namely, between the notch parts of the 1st coil winding 4). The distance between the side wall part 31 and the side wall part 32 is the same as that of the coil winding. It is preferable that it is larger than the distance between the two notch parts provided, and smaller than the length of the longest straight line among the straight lines connecting the ends of these notch parts. The “distance between the notches” refers to the distance between the notches along the direction perpendicular to the direction in which the coil winding is inserted into the spacer 3 when the coil winding is viewed from the direction of the axis A. The maximum value of the distance.

Specifically, for example, in the above embodiment, the ends 56A ₁ and 56A _{2 of} the notch portion 56A of the second coil winding 5 and the ends 56B ₁ and 56B _{2 of the} notch portion 56B shown in FIG. When the distance between the side walls 31 and 32 is smaller than the longest straight line (in this case, the straight line 56A ₁ 56B ₂ and the straight line 56A ₂ 56B ₁ ) connecting the two points of The second coil winding 5 is restrained from rotating once around the axis. In addition, the rotation of the coil winding can be further suppressed by bringing the distance between the side wall portions 31 and 32 closer to the minimum diameter of the first coil winding 4 and the second coil winding 5.

  In the above-described embodiment, the case where the spacer 3 is two-fold symmetric with respect to the axis A and two-fold symmetric with respect to the straight line L1 perpendicular to the direction of the axis A (that is, up, down, left and right is symmetric) has been described. It is not essential. However, in the case of being symmetric twice with respect to the axis A and symmetric twice with respect to the straight line L1 perpendicular to the direction of the axis A, it is not necessary to consider the vertical and horizontal directions of the spacer 3, thereby improving the workability during assembly. To do.

  In the coil component 1 described in the above embodiment, the configuration in which the two coil windings of the first coil winding 4 and the second coil winding 5 are attached to the spacer 3 has been described. One may be sufficient, and conversely, three or more may be sufficient, and the winding number of a coil winding should just be 1 turn or more. Further, the shape of the winding member constituting the coil winding is not limited to the end ring shape, and may be a shape like an edgewise coil, for example. Moreover, although the coil winding which makes | forms an annular | circular shape was demonstrated in the said embodiment, the rectangular shape which has opening in the center part may be sufficient as the shape of a coil winding, for example. That is, the shape of the coil winding is not particularly limited as long as it can be inserted into the spacer 3.

  In the above embodiment, the first coil winding 4 and the second coil winding along the extending direction of the side walls 31 and 32 in the opening (the opening 39 in FIG. 3B) are fixed by the screw 21. Although the structure which controlled the movement of the wire 5 was demonstrated, the structure which controls the movement of the coil winding in the opening at the time of attaching a coil winding with respect to the spacer 3 by changing the shape of a coil winding, and You can also Specifically, when a coil winding is inserted into the opening of the spacer 3, protrusions or notches that contact the side walls 31, 32 of the spacer 3 and the edges of the coupling portions 33, 34 are provided in advance. Thus, it is possible to prevent the coil winding from passing through the opening.

  Moreover, in the coil component 1 of the said embodiment, although the side wall parts 31 and 32 are provided in the position corresponding to the outer leg of the magnetic body core member 6A, the side wall parts 31 and 32 are provided in the position different from this arrangement | positioning. It is good also as an aspect.

  The shape of the pair of magnetic core members 6A and 6B is not limited to the so-called EI shape shown in the above embodiment. For example, both of the magnetic core members 6A and 6B have a so-called EE shape having one main leg and two outer legs, or the magnetic core member 6A has one main leg and one outer leg. A so-called UI type shape or the like may be provided, or an air core core having neither a main leg nor an outer leg may be used.

  The configuration of the switching power supply device is not limited to FIGS. That is, the coil component 1 according to the present embodiment is also suitably used for an inverter, for example. In the switching power supply device 100, the coil component 1 is not limited to the choke coil 170, and is preferably used for the main transformer 140.

(Modification)
Next, as another shape of the coil component, a configuration in which the spacer is provided with the stopper portion and the coil winding is provided with the contact portion will be described with reference to FIGS.

  14 to 21 correspond to FIGS. 2 to 9 of the above embodiment. That is, FIG. 14 is a perspective view illustrating the configuration of the spacer and the first coil winding and the method of attaching the first coil winding according to the modification. FIGS. 15A and 15B are diagrams for explaining the configuration of the spacer in FIG. 14, FIG. 15A is a plan view of the spacer, and FIG. 15B is a view taken along the arrow XVB-XVB in FIG. 14. FIG. 16 is a diagram illustrating the configuration of the first coil winding, FIG. 16 (a) is a plan view of the first coil winding, and FIG. 16 (b) is a bottom view of the first coil winding. FIG. FIG. 17 is a perspective view for explaining a configuration of a component including a spacer and a first coil winding and a method for attaching the second coil winding to the spacer. 18 is a view taken along arrow XVIII-XVIII in FIG. FIG. 19 is a diagram illustrating the configuration of the second coil winding, FIG. 19 (a) is a plan view of the second coil winding, and FIG. 19 (b) is a bottom view of the second coil winding. FIG. FIG. 20 is a perspective view of a coil in which a second coil winding is attached to a component composed of a spacer and a first coil winding. FIG. 21 is a view taken in the direction of arrows XXI-XXI in FIG.

  First, as shown in FIGS. 14 and 15, the spacer 3A has a surface on the axis A side of the two side wall portions 31 and 32 extending along the axis A direction (vertical direction in FIG. 2) of the first coil winding 4A. In addition to the protrusions 37A, 37B, 38A, 38B, stoppers 37D, 37E, 38D, 38E are provided. The stopper portions 37D and 38D are provided below the protrusions 37C and 38C (on the connecting portion 34 side) in FIG. 14 at a position where the first coil winding 4A is attached.

  On the other hand, as shown in FIG. 16, the winding member 42 of the first coil winding 4A has a contact portion cut out on the cutout portion 47A in a shape corresponding to the shape of the stopper portion 37D. 47C is provided, and a contact portion 47D formed in a shape corresponding to the stopper portion 38D is provided on the notch portion 47B. Among these, the region that becomes the step between the cutout portion 47A and the contact portion 47C is formed so as to contact the surface 37F on the center side of the spacer 3A in the stopper portion 37D. Therefore, the cutout portion 47A is formed so as to contact the surface 31A of the side wall portion 31 instead of the stopper portion 37D. On the other hand, the contact portion 47D contacts the outer surface of the spacer 3A (corresponding to the surface facing the surface 37F of the stopper portion 37D on the side wall portion 31 side) of the stopper portion 38D provided on the side wall portion 32. Thus, the cutout portion 47B is formed so as to contact the stopper portion 38D.

  As a result, when the first coil winding 4A is inserted into the spacer 3A and attached so that the axis A coincides, the contact portion 47C is engaged with the stopper portion 37D, and the stopper portion 38D is engaged. The contact portion 47D is in a contact state, and the coil winding 4A is held by the spacer 3A as shown in FIG. Accordingly, it is possible to more effectively prevent the first coil winding A from rotating along the axis due to vibration or the like, and in the process of manufacturing the coil, the first coil winding 4A and the spacer 3A Positioning becomes easy and workability in manufacturing is improved. Further, when viewed from the direction of the axis A, in the first coil winding 4A, a direction in which the contact portion 47C meshes with the stopper portion 37D, and a direction in which the contact portion 47D contacts the stopper portion 38D, Since they are different from each other, rotation along the direction of the axis A can be more effectively suppressed, and an axial deviation from the axis A can be effectively suppressed.

  Further, the stopper portions 37E and 38E are provided above the protrusions 37A and the protrusions 38A (on the connecting portion 33 side) in FIG. 14 and at positions where the second coil winding 5A is attached. As shown in FIGS. 17 and 19, the second coil winding 5A is provided with a contact portion 56C cut out in a shape corresponding to the shape of the stopper portion 37E on the cutout portion 56A. A contact portion 56D formed in a shape corresponding to the stopper portion 38E is provided on the notch portion 56B.

  Among these, the contact portion 56C is formed so as to contact the outer surface of the spacer 3A in the stopper portion 37E, similarly to the contact portion 47C, and the notch portion 56A contacts the stopper portion 37E. It is formed as follows. On the other hand, a region that forms a step between the notch portion 56 and the abutting portion 56D is formed so as to abut on the center side surface of the spacer 3A in the stopper portion 38E. Therefore, the cutout portion 56B is formed so as to contact the surface 32A of the side wall portion 32, not the stopper portion 38E.

  Thus, when the second coil winding 5A is inserted into the component 7A composed of the spacer 3A and the first coil winding 4A and attached so that the axis A coincides, the abutting portion against the stopper portion 37E While 56C abuts, the abutting portion 56D is engaged with the stopper portion 38E, and the second coil winding 5A is held by the spacer 3A as shown in FIGS. This can more effectively prevent the second coil winding 5 </ b> A from rotating along the axis due to vibration or the like. Also, in the second coil winding 5A, as in the first coil winding 4A, when viewed from the direction of the axis A, the direction in which the contact portion 56C contacts the stopper portion 37E and the stopper portion 38E On the other hand, since the direction in which the contact portion 56D abuts is different from each other, the rotation and the axial deviation along the direction of the axis A can be more effectively suppressed. Further, in the process of manufacturing the coil, the first coil winding 4A and the spacer 3A can be easily positioned, and the second coil winding 5A and the spacer 3A can be easily positioned. Will improve.

  In addition, the shape of stopper part 37D, 37E, 38D, 38E and the position which provides these stopper parts are not limited to the form of said modification, A various change can be performed. Further, the positions and shapes of the contact portions of the first coil winding 4A and the second coil winding 5A can be changed as appropriate in accordance with the position and shape of the stopper portion.

  DESCRIPTION OF SYMBOLS 1 ... Coil components, 2, 2A ... Coil, 3, 3A ... Spacer, 4, 4A ... 1st coil winding, 5, 5A ... 2nd coil winding, 6A, 6B ... Magnetic body core member, 31, 32 ... Side wall part, 33, 34 ... connecting part, 33A, 4A ... guide part, 35, 36 ... opening, 37A, 37B, 38A, 38B ... projecting part, 37D, 37E, 38D, 38E ... stopper part, 41, 42, 51 52 ... Winding members, 46B, 47A, 47B, 56A, 56B, 57A, 57B ... Notches, 47C, 47D, 56C, 56D ... Contact parts, 100 ... Switching power supply device, 140 ... Main transformer, 170 ... choke coil.

Claims (9)

Two insulating side walls extending in the axial direction along an outer peripheral surface of a coil winding disposed opposite to each other across the axis and wound around the axis by one or more turns;
The ends of the two side walls are connected to each other in the same direction with respect to the coil winding along the direction in which the axis extends, and a part of the coil winding is connected to the axis. Two insulating connecting parts sandwiched from the direction;
Two insulative protrusions for insulating between the coil windings that protrude from each other on the axis side surfaces of the two side wall portions and are adjacent to each other along the axial direction;
With
A stopper portion is located at a position different from the protruding portion of the surface on the axis line side of the side wall portion and in contact with the coil winding when the coil winding is inserted from a direction perpendicular to the axis. A spacer characterized by being formed .   The spacer according to claim 1, wherein the two protrusions have the same position in the axial direction.   The two side wall portions, the two connecting portions, and the two projecting portions are two-fold symmetric with respect to the line perpendicular to the axis and the shape and arrangement thereof are two-fold symmetric with respect to the axis. The spacer according to claim 1, wherein:   It further comprises guide portions for positioning with respect to a pair of magnetic core members that protrude outward from at least one of the two side wall portions and the two coupling portions and sandwich the coil winding from the axial direction. The spacer according to any one of claims 1 to 3. A coil winding wound more than one turn around the axis;
Coil, characterized in that it comprises a spacer according to one of claims 1-4. The coil winding is formed by connecting a plurality of plate-like windings along the axial direction. When viewed from the axial direction, the coil winding forms a substantially annular shape and a part of the outer periphery is linear. Two notches are provided on both sides of the axis,
The distance between the surfaces on the axis line side of the two side wall portions is larger than the distance between the two notch portions, and is the longest straight line connecting the end portions of the two notch portions facing each other. The coil according to claim 5 , wherein the coil is smaller than the length of the coil. A coil winding wound more than one turn around the axis;
A coil comprising the spacer according to claim 1 ,
The coil winding is
A coil comprising: an abutting portion that abuts against the stopper when the coil winding is inserted into the spacer from a direction perpendicular to the axis so that the axes coincide with each other. A coil component comprising: the coil according to any one of claims 5 to 7 ; and a pair of magnetic core members that sandwich the coil winding from the axial direction. A switching power supply device comprising the coil component according to claim 8 .

Images