JP2020205322A - Reactor - Google Patents

Abstract

To improve assembly working property for the core in a reactor.SOLUTION: A reactor 10 includes a coil 12 consisting of an upper layer 20 and a lower layer 22 wound on the outer peripheral side of a bobbin 14 by α winding. A fastening component 16 is attached to the outside of the coil 12. The fastening component 16 is constituted of a first plate 30 and a second plate provided at the ends of the coil 12 on the upper layer 20 side and the lower layer 22 side, and multiple coupling members 34 for coupling the first protrusion 38 of the first plate 30 and the second protrusion of the second plate. In a state where the first plate 30 and the second plate are arranged for the coil 12, the coupling member 34 is provided to become the outer peripheral side of the coil 12, and when the first plate 30 and the second plate are coupled by the coupling member 34, spreading of the coil 12 by springback is regulated by the fastening component 16.SELECTED DRAWING: Figure 1

Description

The present invention relates to a reactor that holds the outer peripheral surface of a coil formed by α-winding.

Conventionally, a reactor having a coil wound in two stages by α winding and a set of cores in which the coil is housed has been known. As disclosed in Patent Document 1, such a reactor has a coil in which a flat conductor wire having conductivity and wide in the height direction is wound in two stages and in an annular shape by α-winding, and the coil thereof. It is arranged so that one end and the other end are on the top and bottom. Then, the center of the wound coil is inserted into the outer peripheral side of the winding core portion formed in the center of the core so that the coil is housed in the core, and one end and the other end are outside the core, respectively. It is pulled out from the drawer groove opened in.

JP-A-2007-305665

However, in the coil wound as described above, a force (springback) that causes the bent flat lead wire to return to its original state due to elastic deformation acts outward in the radial direction. Therefore, for example, the coil is assembled in the core. At this time, it is necessary for the operator to perform the work while suppressing the expansion of the coil in the outer peripheral direction, and moreover, it is necessary to assemble the ends of the coils at positions corresponding to the drawer grooves, so that the assembly workability is improved. There is a problem that it is bad.

The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a reactor capable of improving the workability of assembling a coil to a core.

In order to achieve the above object, the aspect of the present invention has the first and second winding layers having two stages in the axial direction, and the first and second winding layers are wound around the bobbin by α winding. It is provided with a coil, a core in which the coil and the bobbin are housed, and a filling portion formed by filling the inside of the core with a filler, and the first winding layer is provided on one side along the axial direction of the bobbin. In the reactor where the second volume layer is provided on the other side along the axial direction.
Equipped with a tightening member mounted on the outer peripheral side of the coil
The tightening member includes a first plate provided on one end surface side in the axial direction facing the core in the first winding layer.
A second plate provided on the other end surface side in the axial direction facing the core in the second winding layer, and
A connecting member provided on the outer peripheral side of the coil, which contacts at least a part of the outer peripheral surface of the coil and connects the first plate and the second plate to each other.
To be equipped.

According to the present invention, in a reactor including a coil in which the first and second winding layers having two stages in the axial direction are wound around a bobbin by α winding, and a core in which the coil is housed together with the bobbin, the coil is provided. The tightening member mounted on the outside of the first winding layer is provided on the one end surface side in the axial direction facing the core in the first winding layer, and the second plate provided on the other end surface side in the axial direction facing the core in the second winding layer. It is composed of a plate and a connecting member provided on the outer peripheral side of the coil, which contacts at least a part of the outer peripheral surface of the coil and connects the first plate and the second plate to each other.

Therefore, the wound coil is wound by holding the axial end surface side and the axial other end surface side of the coil by the first and second plates constituting the tightening member and holding the outer peripheral surface of the coil by the connecting member. Even when the coil tries to expand outward in the radial direction by springback, the expansion of the coil is restricted by the contact of the connecting member with the outer peripheral surface of the coil.

As a result, even when the wound coil tries to expand radially outward by springback, the expansion of the coil can be suitably regulated by the tightening member, and the coil is cored as compared with the conventional reactor. Since it can be easily assembled to the coil, the assembly workability can be improved.

According to the present invention, the following effects can be obtained.

That is, the first and second winding layers, which are two steps in the axial direction in the reactor, have a coil wound by α winding, and the tightening member mounted on the outside of this coil is cored in the first winding layer. A first plate provided on the one end surface side in the axial direction facing the coil, a second plate provided on the other end surface side in the axial direction facing the core in the second winding layer, and an outer peripheral surface of the coil provided on the outer peripheral side of the coil. It is composed of a connecting member that contacts at least a part of the above plate and connects the first plate and the second plate to each other.

As a result, the coil is wound by holding the outer peripheral surface of the coil by the connecting member while holding the axial end surface side and the axial other end surface side of the coil by the first and second plates constituting the tightening member. Even when the coil is about to expand outward in the radial direction by springback, the expansion of the coil can be regulated by the connecting member in contact with the outer peripheral surface of the coil.

As a result, the radial outward expansion of the coil due to springback can be suitably regulated by the tightening member, so that the coil can be easily assembled to the core as compared with the conventional reactor. Assembling workability can be improved.

It is a partially omitted external perspective view of the reactor which concerns on embodiment of this invention. It is the whole plan view of the reactor shown in FIG. It is an exploded perspective view of the reactor shown in FIG. It is sectional drawing along the IV-IV line of FIG.

Suitable embodiments of the reactor according to the present invention will be given and will be described in detail below with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, the reactor 10 includes a coil 12 whose both ends are pulled out from the outer peripheral side and wound by α winding, and a bobbin 14 in which the coil 12 is wound on the outer peripheral side. A tightening member 16 that holds the coil 12 from the outside while being wound around the bobbin 14 and a core 18 in which the coil 12 and the bobbin 14 are housed are included.

For the coil 12, for example, a flat conducting wire covered with an insulating film such as enamel and having conductivity is used, and α is spread over two layers in the vertical direction (arrows A1 and A2 directions) so that the wide surface thereof is in the radial direction. It is wound around the outer circumference of the bobbin 14.

Specifically, the coil 12 is formed with an upper layer (first winding layer) 20 and a lower layer (second winding layer) 22 that are wound a plurality of times, respectively, and the first end portion 24 and the end portion of the upper layer 20 are formed. The second end portion 26, which is the end portion of the lower layer 22, is pulled out toward the outside. Further, a portion connecting the upper layer 20 and the lower layer 22 is provided in the middle of the coil 12. The upper layer 20 and the lower layer 22 of the coil 12 are formed with the same number of turns, and the outermost peripheral diameters thereof are formed to be substantially the same.

In this way, in the coil 12, the first end portion 24, which is one end along the winding direction, is linearly drawn out from the outermost peripheral side at the winding portion of the upper layer 20 of the two layers, and becomes the other end. The second end portion 26 is linearly pulled out from the outermost peripheral side at the winding portion of the lower layer 22 of the two layers. Further, the first end portion 24 and the second end portion 26 face each other across the winding portion of the coil 12 and extend in the same direction, and are offset in the vertical direction (arrows A1 and A2 directions) (in the vertical direction (arrows A1 and A2 directions)). (See FIG. 1).

The bobbin 14 is formed, for example, from a resin material in a cylindrical shape, and a coil 12 is wound around the bobbin 14 and is formed slightly higher than the axial height of the coil 12.

Further, a pair of engaging grooves 28a and 28b recessed inward in the radial direction are formed on the outer peripheral surface of the bobbin 14, and the engaging grooves 28a and 28b have a rectangular cross section in the axial direction of the bobbin 14 (arrow A1). , A2 direction), and is formed at a position symmetrical with respect to the axial center of the bobbin 14.

The tightening member 16 is formed of, for example, a resin material which is a non-conductive material, and is arranged with a first plate 30 arranged on the upper end portion (one end surface in the axial direction) 20a side (arrow A1 direction) of the upper layer 20 in the coil 12. The second plate 32 arranged on the lower end portion (the other end surface in the axial direction) 22a side (arrow A2 direction) of the lower layer 22 of the coil 12, and the first plate 30 and the first plate 30 provided on the outer peripheral side of the coil 12. Includes a plurality of connecting members 34 that connect the two plates 32.

The first plate 30 is formed, for example, by press-molding a plate material having a predetermined thickness, and has a first annular portion (annular portion) 36 formed in an annular shape and an outer peripheral portion of the first annular portion 36. It has a plurality of first projecting pieces (projecting portions) 38 extending radially outward from the surface. Here, a case where the first plate 30 has three first protruding pieces 38 will be described.

The first annular portion 36 is formed with a diameter smaller than the outer peripheral diameter of the coil 12, and the first hole portion (hole portion) 39 is formed inside the first annular portion 36. The inner peripheral diameter of the first hole 39 is formed to be substantially the same as or slightly larger than the outer diameter of the bobbin 14, and a pair of first holes protruding inward in the radial direction from the inner peripheral surface of the first hole 39. It has convex portions (second protruding portions) 40a and 40b. The first convex portions 40a and 40b are formed, for example, in a substantially rectangular cross section, and are formed at positions facing each other with the center of the first annular portion 36 interposed therebetween.

Then, when the bobbin 14 is inserted into the first annular portion 36, the first convex portions 40a and 40b are inserted and engaged with the engaging grooves 28a and 28b of the bobbin 14, whereby the said. The first plate 30 including the first annular portion 36 and the bobbin 14 are relatively positioned along the circumferential direction.

The first projecting pieces 38 are formed so as to be equidistant from each other along the circumferential direction of the first annular portion 36, and are formed so as to project with a constant width and outward in the radial direction with the same length. At the same time, as shown in FIG. 2, the length is set so as to slightly project outward in the radial direction with respect to the outermost peripheral portion of the coil 12. In other words, the three first projecting pieces 38 are formed so as to be separated from each other by 120 ° with respect to the center of the first ring portion 36.

Further, at the outer peripheral side end portion 38a of the first protruding piece 38, a first fitting recess 42 notched toward the first annular portion 36 side is formed in the center thereof, and the first protruding piece 38 is formed. A first protrusion (third protrusion) 44 that protrudes by a predetermined height is formed on the upper surface of the core 18 that is orthogonal to the extending direction of the piece 38 and faces the cover core portion 60 of the core 18, which will be described later.

The first protrusion 44 is formed, for example, in a semicircular cross section, in the vicinity of the first ring portion 36 along the longitudinal direction of the first protrusion 38, and in the vicinity of the center in the width direction orthogonal to the longitudinal direction. Provided. Then, as shown in FIG. 4, the first protrusion 44 is the ceiling portion of the cover core portion 60 of the core 18, which will be described later, when the tightening member 16 together with the coil 12 is stored in the storage space 64 of the core 18. By abutting against the (inner surface) 68, a gap B1 having a predetermined interval in the axial direction is provided between the ceiling portion 68 and the first protruding piece 38.

The second plate 32 is formed into the same shape as the first plate 30 by press-molding a plate material having a predetermined thickness, for example, and the second annular portion (annular portion) 46 formed in an annular shape and the second plate 32. It has a plurality of second projecting pieces (projecting portions) 48 extending radially outward from the outer peripheral portion of the two-ring portion 46. Here, a case where the second plate 32 has three second protruding pieces 48 will be described as in the case of the first plate 30.

The second annular portion 46 is formed with a diameter smaller than the outer peripheral diameter of the coil 12, and a second hole portion (hole portion) 49 is formed inside the second annular portion 46. The inner peripheral diameter of the second hole 49 is formed to be substantially the same as or slightly larger than the outer peripheral diameter of the bobbin 14, and a pair of second convex portions (second) protruding inward in the radial direction from the inner peripheral portion. It has protrusions) 50a and 50b. The second convex portions 50a and 50b are formed, for example, in a substantially rectangular cross section having the same shape as the first convex portions 40a and 40b, and are formed at positions facing each other with the center of the second annular portion 46 interposed therebetween. There is.

Then, when the bobbin 14 is inserted into the second annular portion 46, the second convex portions 50a and 50b are inserted and engaged with the engaging grooves 28a and 28b of the bobbin 14, whereby the said. The second plate 32 including the second ring portion 46 and the bobbin 14 are relatively positioned along the circumferential direction, and the first protruding piece 38 of the first plate 30 and the second protruding piece of the second plate 32 are positioned. 48 and 48 are arranged so as to be linear in the axial direction (arrows A1 and A2 directions).

The second projecting piece 48 is formed so as to be equally spaced from each other along the circumferential direction of the second annular portion 46, and is formed so as to project by the same length outward in the radial direction with a constant width. At the same time, the length is set so as to slightly project outward in the radial direction with respect to the outermost peripheral portion of the coil 12.

Further, at the outer peripheral side end portion 48a of the second protruding piece 48, a second fitting recess 52 notched toward the second annular portion 46 side is formed in the center thereof, and the second protruding piece 48 is formed. A second protrusion (third protrusion) 54 protruding by a predetermined height is formed on the lower surface of the core 18 which is orthogonal to the extending direction of the piece 48 and faces the base core portion 58 of the core 18, which will be described later.

The second protrusion 54 is formed, for example, in a semicircular cross section, in the vicinity of the second ring portion 46 along the longitudinal direction of the second protrusion 48, and in the vicinity of the center in the width direction orthogonal to the longitudinal direction. Provided. Then, as shown in FIG. 4, the second protrusion 54 is the bottom portion of the base core portion 58 of the core 18, which will be described later, when the tightening member 16 is housed in the storage space 64 of the core 18 together with the coil 12. By abutting against the inner surface) 66, a gap B2 having a predetermined interval in the axial direction is provided between the bottom portion 66 and the second protruding piece 48.

That is, the second protrusion 54 of the second plate 32 protrudes in the axial direction of the reactor 10 in the direction opposite to the first protrusion 44 of the first plate 30 (in the direction of arrow A2).

The connecting member 34 is formed of, for example, a plate material having the same width and a predetermined length, and in order to connect the first protruding piece 38 and the second protruding piece 48, the first and second protruding pieces 38, 48 Three will be provided, which is the same number as.

The connecting member 34 is formed, for example, so as to be substantially equal to or slightly longer than the axial height of the coil 12, and a pair of fittings protruding in the longitudinal direction from the center of both ends along the longitudinal direction thereof. The convex portions 56a and 56b are formed, respectively.

Then, in a state where the connecting member 34 is arranged so as to be orthogonal to the first and second plates 30 and 32, one of the fitting protrusions 56a is formed in the first fitting recess 42 of the first protruding piece 38. It is fitted, and the other fitting convex portion 56b is fitted to the second fitting recess 52 of the second protruding piece 48. As a result, the connecting member 34 is connected so as to be orthogonal to the first and second protruding pieces 38, 48, and the first protruding piece 38 and the second protruding piece 48 are connected to each other accordingly. ..

Further, the connecting member 34 is arranged so as to be in contact with at least a part of the outermost peripheral portions of the upper layer 20 and the lower layer 22 constituting the coil 12, and is connected to the first and second protruding pieces 38 and 48. Are arranged at equal intervals in the circumferential direction.

In the tightening member 16 described above, the first plate 30 and the second plate 32 can be connected by fitting each connecting member 34 to the first and second plates 30 and 32. However, the present invention is not limited to this, and for example, both ends of the connecting member 34 may be press-fitted or welded to the first and second plates 30 and 32 to connect to each other. .. That is, the method of connecting the connecting member 34 to the first and second plates 30 and 32 is not particularly limited.

As shown in FIGS. 1 to 4, the core 18 is formed in a cylindrical shape that can be divided vertically (in the directions of arrows A1 and A2) from the magnetic material, and has a base core portion 58 provided at the bottom and the base. The core shaft portion 62 includes a cover core portion 60 provided so as to cover the upper portion of the core portion 58, and a columnar core shaft portion 62 formed at the center of the base core portion 58 and the cover core portion 60. The outer peripheral side of the coil 12 has a storage space 64 through which the wound bobbin 14 of the coil 12 is inserted and stored.

As shown in FIG. 4, the base core portion 58 has a bottom portion 66 at its axial end, and is a storage space so that the lower end portion 22a of the lower layer 22 and the second plate 32 of the coil 12 face the bottom portion 66. It is stored in 64. On the other hand, the cover core portion 60 has a ceiling portion 68 at its axial end, and is housed in the storage space 64 so that the upper end portion 20a of the upper layer 20 and the first plate 30 of the coil 12 face the ceiling portion 68. Has been done.

Further, as shown in FIGS. 1 to 3, the core 18 has a set of drawer grooves 70a and 70b extending outward from the storage space 64, and the drawer grooves 70a and 70b have the drawer grooves 70a and 70b. The first and second end portions 24 and 26 of the coil 12 are inserted and pulled out to the outside.

Then, the storage space 64 described above is filled with a filler made of a molten resin material in a state where the coil 12 and the bobbin 14 on which the tightening member 16 is mounted are stored and cured to form a molded portion (filling). Part) 72 is formed (see FIG. 4).

The reactor 10 according to the embodiment of the present invention is basically configured as described above, and the case where the wound coil 12 is assembled to the core 18 will be described next.

First, the coil 12 is wound around the outer periphery of the bobbin 14 in two upper and lower stages by α-winding, and then the first and second plates 30 and 32 constituting the tightening member 16 are sandwiched from both ends in the axial direction of the coil 12. Place in. Specifically, the first plate 30 is brought into contact with the upper end 20a of the upper layer 20 with the first protrusion 44 upward (in the direction of arrow A1), and the second plate 54 is downward (in the direction of arrow A2). 32 is brought into contact with the lower end portion 22a of the lower layer 22 of the coil 12.

Next, the first convex portions 40a and 40b of the first plate 30 and the second convex portions 50a and 50b of the second plate 32 are engaged by inserting them into the engaging grooves 28a and 28b of the bobbin 14, respectively. .. As a result, the first and second plates 30 and 32 are positioned relative to the bobbin 14 along the circumferential direction, and the three first projecting pieces 38 and the three second projecting pieces 48 are axes. It is in a state of facing the direction (arrows A1 and A2). At this time, the outer peripheral end portions 38a, 48a of the first and second protruding pieces 38, 48 slightly protrude outward in the radial direction from the outermost peripheral portion of the coil 12, as shown in FIGS. 2 and 4. ..

Then, the connecting member 34 is arranged substantially parallel to the axial direction of the coil 12 on the outer peripheral side of the coil 12 and between the first protruding pieces 38 and the second protruding pieces 48 facing each other. Then, the fitting protrusions 56a and 56b of the connecting member 34 are fitted into the first fitting recess 42 of the first protruding piece 38 and the second fitting recess 52 of the second protruding piece 48, respectively. With the first and second protruding pieces 38 and 48 and the connecting member 34 orthogonal to each other, the first plate 30 having the first protruding piece 38 and the second plate 32 having the second protruding piece 48 They are connected in a state of being arranged above and below the coil 12. As a result, the tightening member 16 is attached to the outside of the coil 12.

Further, each connecting member 34 is arranged so as to be slightly separated radially outward from the outermost peripheral portion of the coil 12 or to be in contact with the outermost peripheral portion.

As a result, the coil 12 wound in two stages of the upper layer 20 and the lower layer 22 by α winding has a diameter due to the connecting member 34 of the tightening member 16 even if a force is urged outward in the radial direction by the springback thereof. Spreading outward in the direction is regulated and maintained in a well-wound state.

Finally, with the tightening member 16 mounted on the outside of the coil 12 as described above, the bobbin 14 provided at the center thereof is inserted into the outer peripheral side of the core shaft portion 62 of the core 18, and the storage space 64 After being stored inside, the cover core portion 60 is mounted from above so as to cover the base core portion 58, and the first and second end portions 24 and 26 are pulled out from the drawer grooves 70a and 70b, respectively. And.

As a result, as shown in FIG. 4, each of the first protrusions 44 of the first plate 30 comes into contact with the ceiling portion 68 of the cover core portion 60, whereby the first plate 30 and the cover core portion 60 are brought into contact with each other. The gap B1 is formed at a predetermined distance in the axial direction, and each of the second protrusions 54 of the second plate 32 comes into contact with the bottom 66 of the base core portion 58, whereby the second plate 32 And the base core portion 58 are separated from each other by a predetermined distance in the axial direction to form a gap B2.

Then, by filling the storage space 64 of the core 18 with a filler made of a molten resin material, the storage space 64 including the gaps B1 and B2 is completely filled with the filler. After being filled, the filler is cooled for a predetermined time to cure the filler and become a molded portion 72. As a result, the coil 12, the bobbin 14, and the tightening member 16 mounted on the coil 12 are fixed at a predetermined position with respect to the core 18 to form the reactor 10.

As described above, in the present embodiment, the coil 12 wound around the bobbin 14 so as to form two stages of the upper layer 20 and the lower layer 22 by α winding, and the core 18 in which the coil 12 is housed together with the bobbin 14. In the reactor 10 provided with the above, the first and second plates 30 and 32 provided so that the tightening member 16 mounted on the outside of the coil 12 faces the upper end 20a and the lower end 22a of the coil 12, respectively. And a plurality of connecting members 34 provided on the outer peripheral side of the coil 12 and connecting the first plate 30 and the second plate 32 to each other.

Therefore, the upper end portion 20a and the lower end portion 22a of the coil 12 can be held by the first and second plates 30 and 32 constituting the tightening member 16, and the outer peripheral side of the coil 12 can be held by the plurality of connecting members 34. Therefore, even when the wound coil 12 tries to expand outward in the radial direction by springback, it is preferable that the coil 12 expands by contacting the plurality of connecting members 34 with the outermost peripheral portion of the coil 12. Can be regulated to.

As a result, when the coil 12 is assembled to the storage space 64 of the core 18, the wound state of the coil 12 is suitably maintained by the tightening member 16, so that the operator suppresses the springback of the coil 12. Compared with the conventional reactor that had to be assembled, the coil 12 can be assembled easily and surely, and the assembling workability can be improved.

Further, since the first and second plates 30 and 32 can be easily and inexpensively manufactured by press-molding a plate material made of a resin material, the manufacturing cost of the tightening member 16 can be reduced and the cost can be reduced. It is possible to obtain.

Further, since the tightening member 16 is configured to connect a set of the first and second plates 30 and 32 with a plurality of connecting members 34, its assembly becomes easy.

Furthermore, in the first and second plates 30 and 32 of the tightening member 16, the first and second annular portions 36 and 46 formed at the center are formed with a diameter smaller than the outer peripheral diameter of the coil 12. Therefore, in the storage space 64 of the core 18, the upper end portion 20a of the upper layer 20 and the lower end portion 22a of the lower layer 22 of the coil 12 are stored in the storage space 64 in an exposed state.

Therefore, when the filler is filled in the storage space 64 of the core 18, gaps B1 and B2 into which the filler enters are provided between the upper end 20a of the upper layer 20 and the lower end 22a of the lower layer 22 of the coil 12 and the core 18. This makes it possible to increase the contact area between the mold portion 72 filled with the filler and the coil 12. As a result, it is possible to improve heat dissipation by effectively dispersing the heat of the coil 12 through the mold portion 72 made of the filler in the gaps B1 and B2.

Further, first convex portions 40a and 40b and second convex portions 50a and 50b protruding inward with respect to the first and second annular portions 36 and 46 of the first and second plates 30 and 32 are provided. By engaging with the engaging grooves 28a and 28b formed on the outer peripheral surface of the bobbin 14, the first and second plates 30 and 32 with respect to the bobbin 14 can be easily and reliably positioned in the circumferential direction. In addition to being able to do so, relative positioning of the first plate 30 and the second plate 32 along the circumferential direction is also performed. Therefore, the plurality of first projecting pieces 38 in the first plate 30 and the plurality of second projecting pieces 48 in the second plate 32 can be easily arranged so as to face each other in the axial direction.

Further, the first and second protruding pieces 38 and 48 of the first and second plates 30 and 32 have a plurality of first and downward protrusions on the cover core portion 60 side and the base core portion 58 side, respectively. The second protrusions 44 and 54 are provided, the first protrusion 44 is brought into contact with the ceiling portion 68 of the cover core portion 60, and the second protrusion 54 is brought into contact with the bottom portion 66 of the base core portion 58.

As a result, in the axial direction of the reactor 10, gaps B1 and B2 at predetermined intervals can be provided between the first and second plates 30 and 32 and the core 18, and the gaps B1 and B2 are filled with the filler. By forming the mold portion 72, the heat dissipation of the coil 12 is improved through the mold portion 72 as compared with the case where the first and second plates 30 and 32 are in direct contact with the core 18. Can be enhanced.

Further, the case where the tightening member 16 described above includes three connecting members 34 and three first and second protruding pieces 38 and 48 to which the connecting members 34 are connected has been described. The number of the connecting member 34, the first and second projecting pieces 38, and 48 is not limited, and if the number of the connecting member 34 and the first and second protruding pieces 38, 48 is the same and the number is the same, the quantity may be appropriately set.

It should be noted that the reactor according to the present invention is not limited to the above-described embodiment, and of course, various configurations can be adopted without departing from the gist of the present invention.

10 ... Reactor 12 ... Coil 14 ... Bobbin 16 ... Tightening member 18 ... Core 28a, 28b ... Engagement groove 30 ... First plate 32 ... Second plate 34 ... Connecting member 36 ... First annular portion 38 ... First protrusion Piece 44 ... 1st protrusion 46 ... 2nd ring 48 ... 2nd protrusion 54 ... 2nd protrusion 64 ... Storage space 72 ... Molded parts B1, B2 ... Gap

Claims (4)

A coil having first and second winding layers having two stages in the axial direction, and the first and second winding layers being wound around a bobbin by α winding, and a core in which the coil and the bobbin are housed. The core is provided with a filling portion formed by filling the inside of the core with a filler, the first winding layer is provided on one side along the axial direction of the bobbin, and the second winding layer is said. In the reactor provided on the other side along the axial direction,
A tightening member mounted on the outer peripheral side of the coil is provided.
The tightening member includes a first plate provided on one end surface side in the axial direction facing the core in the first winding layer.
A second plate provided on the other end surface side in the axial direction facing the core in the second winding layer, and
A connecting member provided on the outer peripheral side of the coil, which contacts at least a part of the outer peripheral surface of the coil and connects the first plate and the second plate to each other.
With a reactor. In the reactor according to claim 1,
The first and second plates have an annular portion formed with a diameter smaller than the outer peripheral diameter of the coil, and a ring portion.
A protruding portion protruding radially outward from the outer peripheral portion of the annular portion,
With a reactor. In the reactor according to claim 2,
The first and second plates have a hole formed in the center of the ring portion and a hole portion formed in the center of the ring portion.
A second protruding portion that protrudes radially inward from the inner peripheral portion of the hole portion,
With
A reactor having an engaging groove on the outer peripheral surface of the bobbin that engages with the second protrusion. In the reactor according to claim 3,
The first and second plates are reactors comprising at least one or more third protrusions that face and contact the inner surface of the core in the axial direction.

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