Reactor

Abstract

Even when the terminal block cannot be secured on all four sides of the case, this reactor provides a way to firmly fix the terminal block and prevent damage to the connection points between the busbar and the coil lead wires, as well as to the terminal block itself. [Solution] The reactor 10 has a reactor body with a coil 3, a bottom surface 51, a plurality of side walls rising from the edge of the bottom surface, an opening on the top surface, a case that houses the reactor body, a terminal block provided inside the case that holds a busbar connected to a filling molded part formed in the gap between the case and the reactor body, and covers a part of the opening. The case has terminal block fixing parts provided on each of the opposing side walls 52b,d, the terminal block is elongated and has a pair of short sides, a pair of longer sides 72, fastening parts 73 that overlap with the terminal block fixing parts and fix the terminal block to the case, and a protruding part 74 provided in the center or near the center of the long sides that protrudes toward the bottom surface of the case and is partially embedded in the filling molded part.

Description

Technical Field

[0006] , , , , , ,

[0005] ,

[0001] The present invention relates to a reactor filled with a filler in a case.

Background Art

[0002] Reactors are used in various applications such as OA equipment, solar power generation systems, automobiles, and uninterruptible power supplies. A reactor is an electromagnetic component that converts electrical energy into magnetic energy for storage and release.

[0003] A reactor has a reactor body and a case. The case has a bottom surface and side walls rising from the edges of the bottom surface, and the upper surface is open. The space defined by the bottom surface and the side walls serves as an accommodation space, and the reactor body is accommodated in this accommodation space. A filled and formed portion formed by solidifying a filler is formed between the case and the reactor body. The heat of the reactor body is propagated to the case through this filled and formed portion, and heat is dissipated to the outside of the reactor. [[ID=I7]]

[0004] The reactor body has a coil. A lead wire is drawn out from the coil. The lead wire is connected to a bus bar. The bus bar is fixed to a terminal block made of resin. The terminal block is disposed on the upper surface of the case and fixed to the side wall of the case by bolts or the like. [[ID=U]]

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] When fixing a terminal block to the side wall of a case, it is desirable to form the terminal block so as to cover the entire opening on the top surface of the case and to fix the terminal block to the side wall on all four sides with bolts or the like, as this ensures a strong fixation. However, if the reactor is large, forming the terminal block to cover the entire opening on the top surface of the case will cause warping, making manufacturing difficult. Also, even if the reactor is small, it may be difficult to cover the entire opening with the terminal block due to the arrangement of other components of the reactor.

[0007] In such cases, it is not possible to fix the terminal block on all four sides of the side wall, and for example, the terminal block may only be fixed to each of the opposing side walls. As a result, the terminal block is prone to vibration. In particular, if the terminal block resonates with the vibration of the reactor, a large stress may be placed on the connection point between the busbar and the coil lead wires, or on the terminal block itself, potentially causing damage.

[0008] The present invention was made to solve the above problems, and its purpose is to provide a reactor that firmly secures the terminal block even when the terminal block cannot be fixed on all four sides of the case, and prevents damage to the connection points between the busbar and the coil lead wires, as well as to the terminal block itself. [Means for solving the problem]

[0009] To achieve the above objective, the reactor of the present invention comprises a reactor body having a coil, a case having a bottom surface and a plurality of side walls rising from the edge of the bottom surface, with an opening on the top surface, which houses the reactor body, a filling molding section provided inside the case and formed in the gap between the case and the reactor body, and a terminal block that holds busbars connected to the lead wires of the coil and is provided so as to cover a part of the opening of the case, wherein the case has terminal block fixing sections provided on each of the opposing side walls, the terminal block is elongated and has a pair of short sides, a pair of long sides longer than the short sides, fastening sections that overlap with the terminal block fixing sections and fix the terminal block to the case, and a projection provided in the center or near the center of the long sides and projecting toward the bottom surface of the case, wherein a part of the projection is embedded in the filling molding section. [Effects of the Invention]

[0010] According to the present invention, even when the terminal block cannot be fixed to the case on all four sides, a reactor can be obtained that firmly secures the terminal block and prevents damage to the connection points between the busbar and the coil lead wires, as well as to the terminal block itself. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view showing the overall structure of the reactor. [Figure 2] This is a perspective view showing the overall structure of the reactor body. [Figure 3] This is a disassembled perspective view of the reactor body. [Figure 4] This is a perspective view of the case. [Figure 5] This is a perspective view of the terminal block. [Figure 6] This diagram shows the terminal block fixed to the case. [Figure 7] This is a view of the terminal block from the bottom. [Figure 8] This is a cross-sectional view AA in Figure 1. [Figure 9] This figure shows the shape of the extension portion of another embodiment. [Figure 10] This figure shows the shape of the extension portion of another embodiment. [Modes for carrying out the invention]

[0012] [Embodiment] A reactor according to an embodiment will be described with reference to the drawings. Figure 1 is a perspective view showing the overall configuration of reactor 10. In each drawing, thickness, dimensions, positional relationships, ratios, or shape may be emphasized for ease of understanding, and the present invention is not limited to such emphasis.

[0013] The reactor 10 is an electromagnetic component that converts electrical energy into magnetic energy for storage and release, and is used in various applications such as office automation equipment, solar power generation systems, and automobiles. The present invention is particularly suitable for reactors with large dimensions, preferably 100 mm or more in length and 100 mm or more in width. The length direction is the dimension in the direction of the winding axis, and the width direction is the direction perpendicular to the winding axis, which is the dimension in the direction of the legs of the core 2 arranged side by side. The reactor 10 comprises a reactor body 1, a case 5, a filling and molding section 6, and a terminal block 7.

[0014] The reactor body 1 is housed in the case 5. The filled molding section 6 is made of a filler material and is a solidified component of the filler material. The filler material is filled inside the case 5. That is, the filled molding section 6 is formed between the case 5 and the reactor body 1. The terminal block 7 has busbars 8 that connect to the coil 3. The terminal block 7 is located above the case 5. Two terminal blocks 7 are provided, and each terminal block 7a and 7b covers a portion of the top surface of the case 5.

[0015] Figure 2 is a perspective view showing the overall configuration of the reactor body 1. Figure 3 is an exploded perspective view of the reactor body 1. As shown in Figures 2 and 3, the reactor body 1 comprises a core 2, a coil 3, and a resin member 4. The coil 3 is mounted on the core 2. The resin member 4 is provided between the core 2 and the coil 3 and insulates the core 2 and the coil 3.

[0016] The core 2 can be made of a compressed powder core, a ferrite core, a laminated steel plate, a metal composite core, or the like. A metal composite core is a magnetic material formed by kneading magnetic powder and resin and curing the resin.

[0017] As shown in FIG. 3, the core 2 is composed of a plurality of core members. The core 2 is composed of a pair of U-shaped core members 21 and a pair of rectangular parallelepiped core members 22. The U-shaped core member 21 has a pair of straight portions 211 and a yoke portion connecting the pair of straight portions 211. The rectangular parallelepiped core member 22 and each straight portion 211 of the U-shaped core member 21 are joined by an adhesive or the like. Thus, by joining the core members 21 and 22, the core 2 becomes an annular shape. Each straight portion 211 and the rectangular parallelepiped core member 22 are called legs, and the coil 3 is mounted thereon.

[0018] The coil 3 is composed of a single flat rectangular conductive member insulated with enamel or the like. The coil 3 is formed by winding the conductive member in a cylindrical shape while shifting the winding position in the winding axis direction. In the present embodiment, it is an edgewise coil of a flat wire made of a copper wire. Note that the type and winding method of the wire of the coil 6 are not limited to this, and other forms may be used.

[0019] Four coils 3 are provided, and two coils 3 are mounted on one leg. The coils 3 mounted on each leg are arranged side by side such that the outer peripheral surfaces parallel to the winding axis face each other. From each coil 3, a lead wire 31 that is an end of the conductive member is drawn out from one annular surface. Each lead wire 31 is connected to the bus bar 8 by welding. The coil 3 is energized through the bus bar 8 to generate a magnetic flux.

[0020] The resin member 4 covers the periphery of the core 2. The resin member 4 is formed by molding the U-shaped core member 21 and the rectangular parallelepiped core member 22 respectively. However, the resin member 4 may be formed separately and combined with the U-shaped core member 21 and the rectangular parallelepiped core member 22. The resin member 4 insulates the core 2 and the coil 3. Note that the resin member 4 has a fixing portion 41 for fixing the reactor body 1 to the case 5.

[0021] The resin component 4 is made of resin. Examples of the type of resin used for the resin component 4 include epoxy resin, unsaturated polyester resin, urethane resin, BMC (Bulk Molding Compound), PPS (Polyphenylene Sulfide), PBT (Polybutylene Terephthalate), or composites thereof. In addition, a thermally conductive filler may be mixed into the resin.

[0022] Case 5 houses the reactor body 1. Case 5 is made of a lightweight metal with high thermal conductivity, such as an aluminum alloy, and has heat dissipation properties. However, Case 5 does not necessarily have to be metal; it may be made of a resin with excellent thermal conductivity, a resin with a metal heat sink embedded in part of it, or a resin containing a metal filler.

[0023] Figure 4 is a perspective view of case 5. Case 5 has a box-like shape with an open top. Specifically, it has a bottom surface 51 and four side walls 52a, 52b, 52c, and 52d. The bottom surface 51 is roughly rectangular with four sides. The four side walls 52a, 52b, 52c, and 52d rise from the edges of the four sides of the bottom surface 51. Side walls 52b and 52d have inner surfaces that extend parallel to the winding axis of the coil 3, and their inner surfaces face each other. Side walls 52a and 52c have inner surfaces that are perpendicular to the winding axis of the coil 3, and their inner surfaces face each other. The top surface of case 5, opposite the bottom surface 51, is an opening 53. The space defined by the bottom surface 51 and the four side walls 52a, 52b, 52c, and 52d becomes the housing space for the reactor body 1.

[0024] Case 5 has terminal block fixing parts 54. The terminal block fixing parts 54 fix the terminal block 7 to case 5 by bolts or the like. There are four terminal block fixing parts 54 on each of the opposing side walls 52b and 52d. The terminal block fixing parts 54 are located on the outside of case 5. The terminal block fixing parts 54 extend outwards from the outer surface of each side wall 52b and 52d towards the outside of case 5.

[0025] Case 5 has a wall portion 55. The wall portion 55 rises upward from the bottom surface 51 of Case 5. The wall portion 55 is located in the center or near the center between the opposing side walls 52b and side walls 52d. The wall portion 55 extends in the direction of the winding axis of the coil 3. The length of the wall portion 55 is approximately the same as the length of the coil 3 in the winding axis direction. In this embodiment, since two coils 3 are mounted on the leg portion, the length of the wall portion 55 is approximately the sum of the lengths of the two coils in the winding axis direction.

[0026] The upper surface 551 of the wall portion 55 is flat. The upper surface 551 of the wall portion 55 is lower than the upper surface 61 of the filling and molding portion 6 (see Figure 7). That is, the wall portion 55 is embedded in the filling and molding portion 6. The upper surface 551 of the wall portion 55 is in contact with the protruding portion 74 of the terminal block 7, which will be described later.

[0027] Case 5 has fixing parts 56 for securing the reactor body 1. The fixing parts 56 are provided at the four corners inside case 5.

[0028] The filled and molded section 6 is a component formed by the solidification of the filler material. The filler material is filled into the case 5 either before or after the reactor body 1 is housed inside. The upper surface 61 of the filled and molded section 6 is lower than the upper surface of the coil 3. That is, the upper surface of the coil 3 is not covered by the filled and molded section 6 and is exposed.

[0029] The filling and molding section 6 is made of a relatively soft, highly thermally conductive resin to ensure heat dissipation performance for the core 2 and coil 3 and to reduce vibration transmission from the core 2 and coil 3 to the case 5. Furthermore, it is preferable that the filling and molding section 6 has insulating properties. Examples of the filling and molding section 6 include silicone resin, urethane resin, epoxy resin, and acrylic resin.

[0030] The terminal block 7 is a component that holds the busbar 8. The busbar 8 is a plate-shaped conductive material such as copper or aluminum. The busbar 8 is connected to the lead wires 31 of the coil 3 by welding or other means. The busbar 8 is also connected to the connection terminals of external equipment. The reactor 10 is electrically connected to the external equipment via the busbar 8.

[0031] The terminal block 7 is made of resin. Examples of the resin used for the terminal block 7 include epoxy resin, unsaturated polyester resin, urethane resin, BMC (Bulk Molding Compound), PPS (Polyphenylene Sulfide), PBT (Polybutylene Terephthalate), or composites thereof.

[0032] As shown in Figure 1, there are two terminal blocks 7. The two terminal blocks 7a and 7b are identical in shape and size. Terminal blocks 7a and 7b are formed as separate components. Terminal blocks 7a and 7b are located above the case 5. When combined, terminal blocks 7a and 7b cover the entire surface of the opening 53 of the case 5. In other words, each terminal block 7a and 7b covers a portion of the opening 53 of the case 5.

[0033] Figure 5 is a perspective view of the terminal block 7a. Figure 6 is a diagram showing the terminal block 7a fixed to the case 5. As shown in Figures 5 and 6, the terminal block 7 is a roughly rectangular, elongated flat plate shape. That is, the terminal block 7 has a pair of short sides 71 and a pair of long sides 72. The pair of short sides 71 and the pair of long sides 72 form the edge of the terminal block 7a. The short sides 71 extend parallel to the winding axis. Each short side 71 is positioned above the side walls 52b and 52d. The short sides 71 are, for example, less than half the length of the side wall 52b or the side wall 52d.

[0034] The long side portion 72 is longer than the short side portion 71. For example, the long side portion 72 is more than twice the length of the short side portion 71. In this embodiment, the long side portion 72 is about the same length as the side wall 52a. The long side portion 72 is positioned between each short side portion 71 and is connected to the short side portion 71. Of the pair of long side portions 72, the long side portion 72 facing the side wall 52a (or side wall 52c in the case of terminal block 7b) may be referred to as 721, and the long side portion 72 facing the terminal block 7b (or terminal block 7a in the case of terminal block 7b) may be referred to as 722. That is, the long side portion 722 is positioned on the opposite side of the long side portion 721 and is the long side portion 72 of the pair of long side portions 72 that is positioned away from the side wall 52a, whose inner circumferential surface extends in the same direction as the extension direction of the long side portion 72.

[0035] The terminal block 7 further has fastening portions 73 and protruding portions 74. The fastening portion 73 is provided on the short side portion 71. The fastening portion 73 extends from the short side portion 71 toward the terminal block fixing portion 54. The holes in the fastening portion 73 overlap with the holes in the terminal block fixing portion 54. The terminal block 7 is fixed to the case 5 by inserting fasteners such as bolts into the holes in the fastening portion 73 and the holes in the terminal block fixing portion 54 of the case 5 and fastening them. Note that the terminal block 7 does not come into contact with the reactor body 1 except at the connection points between the busbar 8 and the lead wires 31 of the coil 3.

[0036] The number of fastening portions 73 is the same as the number of terminal block fixing portions 54. In this embodiment, terminal blocks 7a and 7b have a total of four fastening portions 73, two on each short side portion 71.

[0037] The protruding portion 74 extends from the bottom surface of the terminal block 7 toward the bottom surface 51 of the case 5. The protruding portion 74 is plate-shaped. The protruding portion 74 is in contact with the wall portion 55 of the case 5. In other words, a part of the protruding portion 74 is embedded in the filled molding portion 6.

[0038] The protrusion 74 is provided between the coils 3. In this embodiment, the protrusion 74 is provided in the center or near the center of the long side portion 72. That is, the protrusion 74 is provided at a position away from the fastening portions 73 provided on each short side portion 71 (in the center or near the center between each fastening portion 73 provided on each short side portion 71). The vicinity of the center where the protrusion 74 is provided refers to the position closest to the center where the protrusion 74 can be embedded in the filling molding portion.

[0039] Figure 7 is a view of the terminal block 7a from the bottom. The protrusion 74 is provided on the long side 722 side. The protrusion 74 extends from the end on the long side 722 side along the winding shaft toward the long side 721 side, but does not reach the long side 721.

[0040] The protruding portion 74 has an extension portion 741. The extension portion 741 is provided at the tip of the protruding portion 74. The extension portion 741 extends from both ends of the wide surface of the protruding portion 74 parallel to the bottom surface 51 of the case 5. That is, the protruding portion 74 has an inverted T shape.

[0041] Figure 8 is a cross-sectional view of AA in Figure 1. The extension portion 741 is in contact with the upper surface 551 of the wall portion 55 of the case 5. The entire extension portion 741 is embedded in the filling and molding portion 6. As shown in Figure 8, both ends of the extension portion 741 extend beyond the upper surface 551 of the wall portion 55. Therefore, the contact area of ​​the extension portion 741 with the filling and molding portion 6 is increased, the terminal block 7 is more firmly fixed by the protruding portion 74, and vibration of the terminal block 7 can be effectively suppressed.

[0042] [Effects and Effects] As described above, the reactor 10 of this embodiment comprises a reactor body 1 having a coil 3, a case 5 having a bottom surface 51 and a plurality of side walls 52a, 52b, 52c, 52d rising from the edge of the bottom surface 51, with an opening 53 on its top surface, which houses the reactor body 1, a filling molding section 6 provided inside the case 5 and formed in the gap between the case 5 and the reactor body 1, and terminal blocks 7a, 7b that hold busbars 8 connected to the lead wires 31 of the coil 3 and are provided so as to cover a part of the opening 53 of the case 5. The case 5 has terminal block fixing sections 54 provided on each of the opposing side walls 52b, 52d. The terminal blocks 7a and 7b are elongated in shape and have a pair of short sides 71, a pair of long sides 72 that are longer than the short sides 71, fastening parts 73 formed on the short sides 71 that overlap with the terminal block fixing parts 54 and fix the terminal blocks 7a and 7b to the case 5, and protruding parts 74 provided in the center or near the center of the long sides 72 that protrude toward the bottom surface of the case 5. Part of the protruding parts 74 are embedded in the filling molding part 6.

[0043] As in this embodiment, when terminal blocks 7a and 7b are elongated, they cannot cover the entire opening 53 of the case 5. Therefore, each terminal block 7a and 7b is fixed to the case 5 only on both sides of the short side 71. Consequently, the fixing strength of the terminal block 7 near the center of the long side 72 is weakened, and if the terminal block 7 resonates with the vibration of the reactor 10, a large stress may be applied to the connection point between the busbar 8 and the lead wire 31 of the coil 3, as well as to the terminal blocks 7a and 7b themselves, potentially causing damage.

[0044] Therefore, in this embodiment, a protrusion 74 is provided on the long side portion 72 of the terminal block 7 in the center or near thereto, and the protrusion 74 is embedded in the filled molding portion 6. As a result, the terminal blocks 7a and 7b are fixed in the center or near thereto of the long side portion 72. Therefore, vibration of the center or near thereto of the terminal blocks 7a and 7b can be suppressed, and resonance can be prevented. Thus, it is possible to prevent large stresses from being applied to the connection point between the busbar 8 and the lead wire 31 of the coil 3, and to prevent damage to the terminal blocks 7a and 7b themselves.

[0045] Furthermore, if, instead of the protruding portion 74, a fixing portion such as a terminal block fixing portion 54 is provided at the location where the protruding portion 74 is located to fix the terminal blocks 7a and 7b with bolts, then an insulating distance must be ensured between the bolts and the coil 3 and busbar 8, which would increase the size of the reactor 10. However, as in this embodiment, if the protruding portion 74 is made to protrude from the terminal blocks 7a and 7b and embedded in the filling molding portion 6, thereby increasing the fixing points of the terminal blocks 7a and 7b, then it is not necessary to ensure an insulating distance, and thus the size of the reactor 10 can be prevented from increasing.

[0046] The protruding portion 74 has an extension portion 741 that extends parallel to the bottom surface 51 of the case 5. This makes the fixing of the terminal blocks 7a and 7b more secure. As a result, vibration of the terminal blocks 7a and 7b can be prevented more effectively, and the resonance suppression effect is enhanced.

[0047] Multiple coils 3 are provided, and the multiple coils 3 are arranged side by side so that their end faces, which are parallel to the winding shaft, face each other. The protruding portion 74 is provided between the multiple coils 3, and the case 5 has a wall portion 55 that protrudes from the bottom surface 51 of the case 5. The wall portion 55 is provided between the coils 3 and is in contact with the protruding portion 74.

[0048] In this way, the contact between the wall portion 55 and the protrusion portion 74 increases rigidity, and vibration of the terminal blocks 7a and 7b can be suppressed by the wall portion 55. In addition, heat from the busbar 8 can be transferred to the wall portion 55 via the protrusion portion 74, improving the heat dissipation of the reactor 10. Furthermore, the provision of the wall portion 55 makes it easier to position the terminal blocks 7a and 7b, improving work efficiency.

[0049] [Other embodiments] While embodiments of the present invention have been described herein, these embodiments are presented as examples and are not intended to limit the scope of the invention. The above embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. Embodiments and their variations are included in the scope and essence of the invention, as well as in the claims and their equivalents.

[0050] In the above embodiment, the protruding portion 74 of the terminal block 7 and the wall portion 55 of the case 5 were in contact, but the invention is not limited to this, and the protruding portion 74 of the terminal block 7 and the wall portion 55 of the case 5 may be arranged to face each other at a close position. That is, the wall portion 55 and the protruding portion 74 each extend to a close position, and there is a small gap between the protruding portion 74 and the wall portion 55, and this gap may be filled by the filling molding portion 6. This allows for manufacturing while taking dimensional tolerances into account, and since the metal wall portion 55 is positioned below the protruding portion 74, a vibration suppression effect of the terminal block 7 can be obtained.

[0051] In the above embodiment, two terminal blocks 7a and 7b were provided, but only one may be used, or only terminal block 7a may be used. In this case, terminal block 7a may be positioned to straddle the central part of the case 5, that is, the central part of the side walls 52b and 52d.

[0052] Furthermore, in the above embodiment, the protrusion 74 of the terminal block 7 was provided between the coils 3, but it is not limited to being between the coils 3 as long as it is provided at a position away from each fastening point 73 formed on each short side 71 (in the center of the long side 72 or nearby thereto). For example, if the upper surface 61 of the filling and molding part 6 is formed at a position higher than the upper surface of the coil 3, the protrusion 74 may be positioned above the upper surface of the coil 3, and a part of the protrusion 74 may be embedded in the filling and molding part 6. In this case, even if the position of the center of the long side 72 is the upper surface of the coil 3, the protrusion 74 can be provided in the center of the long side 72, and vibration of the terminal block 7 can be suppressed more effectively.

[0053] In the above embodiment, the extension portion 741 extended parallel to the bottom surface 51 of the case 5 from both ends of the tip of the protruding portion 74. However, as shown in Figure 9, it may extend from one end face, and the protruding portion 74 may be L-shaped. Also, if the extension portion 741 is embedded in the filling molding portion 6, it may extend from the middle of the protruding portion 74 instead of from the tip, as shown in Figure 10. Furthermore, even when the extension portion 741 extends from the middle, as shown in Figure 10, it may extend from only one end face instead of both ends of the protruding portion 74.

[0054] In the above embodiment, the fastening portion 73 was provided on the short side portion 71, but it is not limited to this. For example, the fastening portion 73 may be provided on the long side portion 721, or, as in the embodiment, it may be provided on the long side portion 72 in addition to the pair of short side portions 71. In this case as well, the area near the center of the long side portion 722 of the terminal block 7 is far from the fastening portion 73 and is therefore prone to vibration. For this reason, by providing the protruding portion 74 in or near the center of the long side portion 722, vibration of the terminal block can be suppressed. [Explanation of Symbols]

[0055] 10 Reactors 1. Reactor body 2 cores 21 U-shaped core member 211 Straight section 22 Rectangular parallelepiped core member 3 coils 31. Leading line 4 Resin components 41 Fixed part 5 cases 51 Bottom 52a, 52b, 52c, 52d side wall 53 Opening 54 Terminal block fixing part 55 Wall 551 Top surface 56 Fixed part 6. Filling and molding section 61 Top surface 7 Terminal block 71 Short side 72, 721, 722 Long side 73 Fastening section 74 Protrusion 741 Extension 8 Bus Bar

Claims

1. A reactor body having a coil, A case having a bottom surface and multiple side walls rising from the edge of the bottom surface, with an opening on the top surface, for housing the reactor body, A filling molding section is provided inside the case and formed in the gap between the case and the reactor body, A terminal block is provided to hold the busbar connected to the lead wire of the coil and to cover a part of the opening of the case, Equipped with, The case has terminal block fixing portions provided on each of the opposing side walls, The terminal block has an elongated shape, A pair of short sides, A pair of longer sides that are longer than the aforementioned shorter side, A fastening portion that overlaps with the terminal block fixing portion and fixes the terminal block to the case, A protrusion is provided in the center of the long side or near thereto, and protrudes toward the bottom surface of the case, It has, A portion of the aforementioned protrusion is embedded in the filling and molding portion. A reactor characterized by the following.

2. The aforementioned protrusion has an extension that extends parallel to the bottom surface of the case. The reactor according to claim 1, characterized by the following:

3. Multiple such coils are provided. The plurality of coils are arranged side by side so that their outer surfaces, which are parallel to the winding shaft, face each other. The aforementioned protrusions are provided between the plurality of coils, The case has a wall portion that rises from the bottom surface of the case, The wall portion is provided between the coils and is in contact with the protruding portion. A reactor according to claim 1 or 2, characterized by the following:

4. Multiple such coils are provided. The plurality of coils are arranged side by side so that their end faces, which are parallel to the winding shaft, face each other. The aforementioned protrusions are provided between the plurality of coils, The case has a wall portion that protrudes from the bottom surface of the case, The wall portion is provided between the coils, extends to a position close to the protrusion, and faces the protrusion. A reactor according to claim 1 or 2, characterized by the following:

Images