Capacitor

Abstract

A first busbar and a second busbar include, respectively, a first plate-shaped overlapping part and a second plate-shaped overlapping part that overlap each other, the gap between the overlapping sections being insulated by an insulation member. The first busbar includes: bent sections that are bent at right angles to the first overlapping section from each facing end of the overlapping section; and through holes formed in the first overlapping section and touching each of the bent sections. The insulation member has a clamping part having a first contact part that contacts the bent sections from the outer side of the first busbar, and a second contact part that passes through the through holes and contacts the bent sections from the inner side of the first busbar, the clamping part clamping the bent sections using the first contact part and the second contact part.

Description

[Technical field]

[0001] The present invention relates to a capacitor. [Background technology]

[0002] Patent document 1 describes a case-molded capacitor in which metallikon electrodes are formed on both end faces of a capacitor element made by laminating or rolling metallized films, bus bars are connected to each metallikon electrode, and portions of the pair of bus bars are overlapped with an insulating plate sandwiched between them, thereby reducing the ESL (equivalent series inductance), which is the inductance component of the bus bars.

[0003] In the case molded capacitor of Patent Document 1, protrusions are provided on both surfaces of the insulating plate facing the pair of bus bars, and by fitting these protrusions into holes provided in the overlapping parts of the bus bars, the relative positions of the external connection terminals of the pair of bus bars are fixed, and the positions of the pair of bus bars and the insulating plate are also fixed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-251400 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the case molded capacitor of Patent Document 1 mentioned above, the contact between the protrusions and holes in the direction perpendicular to the surface of the insulating plate, i.e., in the overlapping direction of a pair of bus bars, is equal to the thickness of the flat bus bars. As a result, the bus bars are prone to movement in this overlapping direction, making it difficult to stably position the bus bars relative to the insulating plate.

[0006] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a capacitor in which it is easy to stably position a bus bar relative to an insulating member. [Means for solving the problem]

[0007] A capacitor according to a main aspect of the present invention includes a capacitor element, a first bus bar and a second bus bar connected to the capacitor element, an insulating member disposed between the first bus bar and the second bus bar. The first bus bar teeth, Flat first stacking section The second bus bar is a flat plate-shaped Second Polymerization Section Includes , The first overlapping portion and the second overlapping portion overlap each other. Located between the first polymerization section and the second polymerization section, The first polymerization section and the second polymerization section Here, at least one of the first bus bar and the second bus bar is insulated from the other bus bar. Among the first polymerization section and the second polymerization section, The above at least Opposing busbars at overlapping portions of one busbar Two Each end has a bent portion bent at a right angle to the overlapping portion, and a front Weight Formed at the junction ,before The insulating member includes a through hole in contact with the bent portion. The bent portion is sandwiched between a clamping portion and a bent part. The above at least a first contact portion that contacts the bent portion from the outside of one bus bar; at least a second contact portion that contacts the bent portion from an inner side of one of the bus bars, The above A first contact portion and The above With the second contact part ,before Clamp the folded part do.

[0008] In the claims, the term "right angle" includes the meaning of "approximately right angle." Effect of the Invention

[0009] According to the present invention, a capacitor can be provided in which the bus bar can be easily and stably positioned relative to the insulating member.

[0010] The effects and significance of the present invention will become clearer from the following description of the embodiment. However, the embodiment shown below is merely an example of how the present invention can be put into practice, and the present invention is not limited to the embodiment described below. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view of a film capacitor according to an embodiment. [Diagram 2] FIG. 2(a) is a perspective view of a capacitor element unit according to the embodiment as viewed from above the front, and FIG. 2(b) is a perspective view of a capacitor element unit according to the embodiment as viewed from above the rear. [Diagram 3] FIG. 3(a) is a perspective view of a first bus bar according to the embodiment, and FIG. 3(b) is a perspective view of a second bus bar according to the embodiment. [Figure 4] FIG. 4(a) is a perspective view of an insulating member according to the embodiment as viewed from above the front, and FIG. 4(b) is a perspective view of an insulating member according to the embodiment as viewed from above the rear. [Diagram 5] FIG. 5 is a front view of a main part of a capacitor element unit according to an embodiment. [Figure 6] FIG. 6(a) is a rear view of a main part of the capacitor element unit according to the embodiment, and FIG. 6(b) is a cross-sectional view taken along line AA' of FIG. 6(a). [Figure 7] FIG. 7 is a cross-sectional view of a mold used for injection molding of an insulating member according to an embodiment. [Figure 8] 8(a) and (b) are plan views of a first member and a second member constituting a mold according to an embodiment, respectively, viewed from their parting surfaces. [Figure 9] FIG. 9 is a front view of a first bus bar and an insulating member according to a modified example. [Figure 10] FIG. 10 is a rear view of a main part of a capacitor element unit according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] A film capacitor 1, which is one embodiment of a capacitor of the present invention, will be described below with reference to the drawings. For convenience, the front-rear, left-right, and up-down directions are indicated in each drawing as appropriate. Note that the directions shown in the drawings indicate only relative directions of the film capacitor 1, and do not indicate absolute directions. For convenience of explanation, some configurations may be given names that correspond to the directions shown in the drawings, such as "front" and "rear."

[0013] In the present embodiment, the film capacitor 1 corresponds to the "capacitor" in the claims. The front-rear direction, the left-right direction, and the up-down direction correspond to the "overlapping direction," the "clamping direction," and the "vertical direction," respectively.

[0014] However, the above description is intended merely to match the configuration of the claims with the configuration of the embodiments, and the above correspondence does not in any way limit the invention described in the claims to the configuration of the embodiments.

[0015] <Composition of film capacitor> FIG. 1 is a perspective view of a film capacitor 1. FIG.

[0016] The film capacitor 1 includes a capacitor element unit 100, a case 200 in which the capacitor element unit 100 is housed, and a filled resin 300 that is filled in the case 200. The portion of the capacitor element unit 100 that is buried in the filled resin 300, in particular the capacitor element 400, is protected from moisture and impact by the case 200 and the filled resin 300.

[0017] FIG. 2(a) is a perspective view of the capacitor element unit 100 seen from above the front, and FIG. 2(b) is a perspective view of the capacitor element unit 100 seen from above the rear.

[0018] Capacitor element unit 100 includes a capacitor element 400 , a first bus bar 500 , a second bus bar 600 , and an insulating member 700 .

[0019] Capacitor element 400 is formed by stacking two metallized films, each having aluminum vapor-deposited on a dielectric film, rolling or laminating the stacked metallized films, and pressing them into a flat shape. Capacitor element 400 has first electrode 410 formed on one end face by spraying a metal such as zinc, and second electrode 420 formed on the other end face by spraying a metal such as zinc.

[0020] Although capacitor element 400 in the present embodiment is formed of a metallized film in which aluminum is deposited on a dielectric film, it may also be formed of a metallized film in which other metals such as zinc, magnesium, etc. Alternatively, capacitor element 400 may be formed of a metallized film in which a plurality of these metals are deposited, or a metallized film in which an alloy of these metals is deposited.

[0021] FIG. 3( a ) is a perspective view of the first bus bar 500 .

[0022] First bus bar 500 is formed by appropriately cutting and bending a metal plate, such as a copper plate, which is a conductive material having a predetermined shape.

[0023] The first bus bar 500 includes a main body portion 510 having a rectangular flat plate shape. The main body portion 510 is divided in the up-down direction into a portion that becomes a first overlapping portion 511 and a portion that becomes a non-overlapping portion 512 that is continuous with the first overlapping portion 511. The non-overlapping portion 512 is located above the first overlapping portion 511. In FIG. 3(a), for convenience, the boundary between the first overlapping portion 511 and the non-overlapping portion 512 is indicated by a two-dot chain line.

[0024] At the upper part of the main body 510 included in the non-overlapping portion 512, a part of the main body 510 is cut and raised, so that four rectangular connection terminal parts 520 are formed lined up in the left-right direction. In the part of the main body 510 where each connection terminal part 520 is cut and raised, a rectangular opening part 513 larger than the connection terminal part 520 is formed. Each opening part 513 is adjacent to a corresponding connection terminal part 520 and lined up in the left-right direction.

[0025] Four rectangular openings 514 are formed in the middle of the main body 510 included in the first overlapping portion 511 at the same positions in the left-right direction as the four openings 513. The four openings 514 have the same size as the four openings 513. Furthermore, rectangular through holes 515 that are long in the vertical direction are formed at the left and right ends of the middle of the main body 510.

[0026] The lower part of the main body portion 510 included in the first overlap portion 511 has a circular opening 516 formed in the center.

[0027] Furthermore, first bus bar 500 includes electrode terminal portion 530 that is bent from the lower end of main body portion 510 at a right angle to main body portion 510. Electrode terminal portion 530 has a rectangular plate shape that is elongated in the left-right direction.

[0028] Furthermore, the first bus bar 500 has a main body portion 510, that is, a left end portion of the first overlapping portion 511 and a left end portion of the non-overlapping portion 512. right Each end portion is provided with a bent portion 540 that is bent at a right angle to the main body portion 510. Each bent portion 540 has a rectangular plate shape that is elongated in the vertical direction. Each bent portion 540 contacts each of the through holes 515.

[0029] FIG. 3( b ) is a perspective view of the second bus bar 600 .

[0030] Second bus bar 600 is formed by appropriately cutting and bending a metal plate, such as a copper plate, which is a conductive material having a predetermined shape.

[0031] The second bus bar 600 includes a main body portion 610 having a rectangular flat plate shape. The main body portion 610 is divided in the up-down direction into a portion that becomes a second overlapping portion 611 and a portion that becomes a non-overlapping portion 612 that is continuous with the second overlapping portion 611. The non-overlapping portion 612 is located below the second overlapping portion 611. In FIG. 3(b), for convenience, the boundary between the second overlapping portion 611 and the non-overlapping portion 612 is indicated by a two-dot chain line.

[0032] At the upper part of the main body 610 included in the second overlapping portion 611, a part of the main body 610 is cut and raised, so that four rectangular connection terminal parts 620 are formed lined up in the left-right direction. In the part of the main body 610 where each connection terminal part 620 is cut and raised, a rectangular opening part 613 larger than the connection terminal part 620 is formed. Each opening part 613 is adjacent to a corresponding connection terminal part 620 and lined up in the left-right direction. The four opening parts 613 have the same size as the four opening parts 514 of the first bus bar 500.

[0033] A circular opening 614 is formed in the center of the intermediate portion of the main body portion 610 included in the second overlap portion 611.

[0034] Furthermore, second bus bar 600 includes electrode terminal portion 630 that is bent from the lower end of main body portion 610 at a right angle to main body portion 610. Electrode terminal portion 630 has a rectangular plate shape that is elongated in the left-right direction.

[0035] FIG. 4(a) is a perspective view of the insulating member 700 as viewed from above the front, and FIG. 4(b) is a perspective view of the insulating member 700 as viewed from above the rear.

[0036] The insulating member 700 is made of a resin such as polyphenylene sulfide (PPS) and is formed by injection molding, which will be described later.

[0037] The insulating member 700 includes a main body 710 having a substantially rectangular plate shape that is long in the left-right direction. The main body 710 is divided in the up-down direction into a first portion 711, a second portion 712 that is continuous with the first portion 711, and a third portion 713 that is continuous with the first portion 711. The second portion 712 is located above the first portion 711, and the third portion 713 is located below the first portion 711. For convenience, the boundaries between the first portion 711 and the second portion 712 and the boundaries between the first portion 711 and the third portion 713 are indicated by two-dot chain lines in Figures 4(a) and (b).

[0038] In the center of first portion 711 of main body 710, a part of front surface 710a of main body 710 protrudes and a part of rear surface 710b of main body 710 is recessed, thereby forming a substantially cylindrical protruding portion 714. Protruding portion 714 has a recess 714a on the back side. A substantially cylindrical gate mark 715 is formed on the surface recessed by protruding portion 714, i.e., the bottom surface of recess 714a, in rear surface 710b of main body 710. Gate mark 715 is formed by injection molding. The outer diameter of protruding portion 714 is smaller than the inner diameter of opening 516 of first bus bar 500 and opening 614 of second bus bar 600.

[0039] Furthermore, four rectangular openings 716 aligned in the left-right direction are formed in the upper portion of first portion 711. The four openings 716 have the same size as the four openings 514 of first bus bar 500.

[0040] Two first ribs 717 are formed on the rear surface 710b of the second portion 712 of the main body 710, protruding rearward and extending in the left-right direction from the left end to the right end. The two first ribs 717 are arranged in the up-down direction with a predetermined interval between them. The predetermined interval is set to a distance equal to or greater than the distance (1 mm) at which the two first ribs 717 are considered to be apart according to regulations related to creepage distance.

[0041] The two first ribs 717 are connected at their left and right ends by a second rib 718. The height of each second rib 718 is the same as the height of each first rib 717.

[0042] Furthermore, the insulating member 700 includes a clamping portion 720 at each of the left end and the right end of the front surface 710a side of the main body portion 710. The clamping portion 720 is composed of a first contact portion 721 located on the outer side of the insulating member 700 and a second contact portion 722 located on the inner side. The first contact portion 721 has a rectangular plate shape elongated in the vertical direction. The second contact portion 722 has a rectangular parallelepiped shape elongated in the vertical direction. The vertical dimension of the first contact portion 721 is larger than the vertical dimension of the second contact portion 722, and the horizontal dimension of the first contact portion 721 is smaller than the horizontal dimension of the second contact portion 722. The first contact portion 721 and the second contact portion 722 have the same dimensions in the front-rear direction. The front-rear dimension of the bent portion 540 of the first bus bar 500 is larger than the front-rear dimension of the first contact portion 721 and the second contact portion 722.

[0043] The first contact portion 721 includes two first ribs 721a. The two first ribs 721a are formed on a side surface of the first contact portion 721 facing the second contact portion 722, at an upper portion and a lower portion of the second contact portion 722, respectively, and extend in the front-rear direction. The second contact portion 722 includes one second rib 722a. The second rib 722a is formed on a side surface of the second contact portion 722 facing the first contact portion 721, at a position between the two first ribs 721a, and extends in the front-rear direction. The gap between the first rib 721a and the second rib 722a is slightly smaller than the thickness (dimension in the left-right direction) of the bent portion 540 of the first bus bar 500.

[0044] 2(a) and (b), the first bus bar 500 is attached to the front side of the insulating member 700. The main body 510 of the first bus bar 500 contacts the front surface 710a of the main body 710 of the insulating member 700. The protruding portions 714 of the insulating member 700 penetrate the openings 516 of the first bus bar 500. The bent portions 540 on both the left and right sides of the first bus bar 500 are clamped by the clamping portions 720 of the insulating member 700. The four openings 514 of the first bus bar 500 overlap the four openings 716 of the insulating member 700.

[0045] The second bus bar 600 is attached to the rear side of the insulating member 700. The main body 610 of the second bus bar 600 contacts the rear surface 710b of the main body 710 of the insulating member 700. The recess 714a of the insulating member 700 overlaps the opening 614 of the second bus bar 600, and the gate mark 715 overlaps the opening 614. There may be some variation in the height of the gate mark 715. When the gate mark 715 becomes high and protrudes rearward from the recess 714a, the tip of the protruding gate mark 715 is inserted into the opening 614 and does not interfere with the main body 610 of the second bus bar 600.

[0046] The four openings 613 of the second bus bar 600 overlap with the four openings 716 of the insulating member 700, and each connection terminal portion 620 of the second bus bar 600 protrudes forward of the first bus bar 500 through each of the three overlapping openings 514, 716, 613. The terminal row of the four connection terminal portions 620 is located below the four connection terminal portions 520. The positions of the front ends of the four connection terminal portions 520 and the positions of the front ends of the four connection terminal portions 620 are aligned.

[0047] The first overlapping portion 511 of the first bus bar 500 and the second overlapping portion 611 of the second bus bar 600 overlap in the front-rear direction. The non-overlapping portion 512 of the first bus bar 500 does not overlap the second overlapping portion 611, and the non-overlapping portion 612 of the second bus bar 600 does not overlap the first overlapping portion 511. A first portion 711 of the insulating member 700 is interposed between the first overlapping portion 511 and the second overlapping portion 611. A second portion 712 of the insulating member 700 overlaps the non-overlapping portion 512 of the first bus bar 500. A third portion 713 of the insulating member 700 is interposed between the non-overlapping portion 612 of the second bus bar 600 and the circumferential surface of the capacitor element 400.

[0048] The capacitor element 400 is disposed between the electrode terminal portion 530 of the first bus bar 500 and the electrode terminal portion 630 of the second bus bar 600. The electrode terminal portion 530 is joined to the first electrode 410 of the capacitor element 400 by a joining method such as soldering. This electrically connects the first bus bar 500 to the first electrode 410. Similarly, the electrode terminal portion 630 is joined to the second electrode 420 of the capacitor element 400 by a joining method such as soldering. This electrically connects the second bus bar 600 to the second electrode 420. Note that pin-shaped terminals may be formed on the electrode terminal portions 530, 630, and these terminals may be joined to the electrodes 410, 420 by soldering or the like.

[0049] FIG. 5 is a front view of a main part of the capacitor element unit 100. As shown in FIG.

[0050] 5, in each clamping portion 720 of the insulating member 700, a first rib 721a of a first contact portion 721 contacts the bent portion 540 from the outside of the first bus bar 500, and a second rib 722a of a second contact portion 722 passing through a through hole 515 of the first bus bar 500 contacts the bent portion 540 from the inside of the first bus bar 500. The first rib 721a and the second rib 722a are so-called crush ribs, and when the bent portion 540 is inserted between the first contact portion 721 and the second contact portion 722, the tip portion of the crush rib is scraped or deformed by the bent portion 540. The first contact portion 721 and the second contact portion 722 contact the bent portion 540 from both sides, and thus a force (force suppressing movement) that holds the first bus bar 500 in the front-rear direction is generated in the insulating member 700.

[0051] First bus bar 500 is positioned in the front-rear and left-right directions with respect to insulating member 700 by a positioning structure formed by bent portions 540 and clamping portions 720 .

[0052] The vertical dimension of through hole 515 is larger than the vertical dimension of second contact portion 722, and a relatively large gap is generated above and below between second contact portion 722 and through hole 515. Therefore, in the present embodiment, another positioning structure (not shown) is provided between first bus bar 500 and insulating member 700, and this positioning structure positions first bus bar 500 in the vertical direction relative to insulating member 700. Furthermore, a positioning structure (not shown) is also provided between second bus bar 600 and insulating member 700, and this positioning structure positions second bus bar 600 in the vertical, front-rear, and left-right directions relative to insulating member 700.

[0053] FIG. 6(a) is a rear view of a main part of the capacitor element unit 100, and FIG. 6(b) is a cross-sectional view taken along line AA' of FIG. 6(a).

[0054] 6(a) and (b), the four connection terminal portions 520 of the first bus bar 500 protrude from the non-overlapping portion 512 to the side opposite (the front side) the second portion 712 of the insulating member 700. The upper end of the second portion 712 is at the same height as the lower ends of the four openings 513 of the first bus bar 500, and the second portion 712 does not overlap with the four openings 513 and the four connection terminal portions 520 in the front-rear direction. Note that the second portion 712 may overlap the lower ends of the four openings 513, if only slightly.

[0055] In the second portion 712 of the insulating member 700, the two first ribs 717 protrude to the opposite side (rear side) from the non-overlapping portion 512 of the first bus bar 500, and have a dimension that is slightly longer in the left-right direction than the overlapping range R so as to be present in the overlapping range R where the non-overlapping portion 512 and the second overlapping portion 611 of the second bus bar 600 overlap when viewed in the up-down direction. In addition, the two second ribs 718 connect the two first ribs 717 outside the overlapping range R in the left-right direction.

[0056] 6(b), a creepage distance D in the up-down direction is ensured between non-overlapping portion 512 of first bus bar 500 and second overlapping portion 611 of second bus bar 600 by second portion 712 of insulating member 700 and two first ribs 717. The rear side of second portion 712 has an uneven surface due to the two first ribs 717. For this reason, the creepage distance D is longer than when the rear side of second portion 712 is flat.

[0057] 1, case 200 is made of resin, for example, polyphenylene sulfide (PPS), which is a thermoplastic resin. Case 200 is formed in a substantially rectangular box shape, and has an opening 201 on the top surface.

[0058] The case 200 is provided with mounting tabs 210 on the left and right outer surfaces and the outer bottom surface. Each mounting tab 210 is formed with an insertion hole 211 penetrating in the front-to-rear direction. A metal collar 212 is fitted into the insertion hole 211 to increase the strength of the hole. When the film capacitor 1 is installed in an installation portion of an external device or the like, these mounting tabs 210 are fixed to the installation portion with screws or the like.

[0059] The filling resin 300 is a thermosetting resin such as an epoxy resin.

[0060] Capacitor element unit 100 is accommodated in case 200 through opening 201. Filling resin 300 in a liquid phase is injected through opening 201 into case 200 with capacitor element unit 100 accommodated therein. Filling resin 300 fills case 200 up to the vicinity of opening 201, and when the injection of filling resin 300 is completed, case 200 is heated. This causes filling resin 300 in case 200 to harden. In this manner, film capacitor 1 is completed.

[0061] The film capacitor 1 is mounted on an external device or the like. The external device or the like is provided with four external terminals 2a on the positive electrode side and four external terminals 2b on the negative electrode side, each of which takes the form of a bus bar. For example, when the first bus bar 500 is a bus bar on the positive electrode side and the second bus bar 600 is a bus bar on the negative electrode side, as shown in FIG. 1, the four external terminals 2a come into contact with the four connection terminal portions 520 of the first bus bar 500 from the rear through the openings 513 and are connected to the connection terminal portions 520 by a joining method such as soldering. Furthermore, the four external terminals 2b come into contact with the four connection terminal portions 620 of the second bus bar 600 from the rear through three openings 613, 716, 514 that overlap in the front-rear direction and are connected to the connection terminal portions 620 by a joining method such as soldering.

[0062] <Method of manufacturing insulating members> Next, a method for manufacturing the insulating member 700 will be described.

[0063] Fig. 7 is a cross-sectional view of a mold 800 used for injection molding of an insulating member 700. Figs. 8(a) and 8(b) are plan views of a first member 801 and a second member 802 constituting the mold 800, respectively, as viewed from their parting surfaces. Note that for convenience, Fig. 8(a) shows the outline of a first molding surface 811 by a dashed line, and Fig. 8(b) shows a gate 820 by a dashed line.

[0064] The insulating member 700 is formed by injection molding using a mold 800 in a molding process.

[0065] The mold 800 is made of steel and is configured by joining a first member 801, which is a core, and a second member 802, which is a cavity. Inside the mold 800, a mold portion 810 having the shape of the insulating member 700 is formed. The mold portion 810 includes a first molding surface 811 for forming a rear surface 710b of the main body portion 710 of the insulating member 700, and a second molding surface 812 for forming a front surface 710a of the main body portion 710 facing away from the rear surface 710b.

[0066] First molding surface 811 includes a substantially cylindrical protruding portion 813 that protrudes toward second molding surface 812 at a position corresponding to the center of main body portion 710. Second molding surface 812 also includes a substantially cylindrical recessed portion 814 that accommodates protruding portion 813. A gap is formed between protruding portion 813 and recessed portion 814. The distance between tip surface 813a of protruding portion 813 and bottom surface 814a of recessed portion 814 is made larger than the distance between first molding surface 811 and second molding surface 812 around it, and the portion between tip surface 813a and bottom surface 814a becomes large gap portion 815.

[0067] In the first molding surface 811, a gate 820 which is an inlet for injecting resin into the mold portion 810 is formed on a tip surface 813a of the protruding portion 813. The gate 820 is circular and opens in the large gap portion 815. In the mold 800, a runner 830 connected to the gate 820 is formed in the first member 801.

[0068] In the molding process, gate 820 is opened by a valve (not shown), and molten resin is injected from gate 820 through runner 830 into mold section 810. As shown by the arrows in Figures 7 and 8, the resin first flows into large gap section 815 of mold section 810. Then, the resin flows radially from large gap section 815 and spreads around. As a result, the entire inside of mold section 810 is filled with resin.

[0069] Here, since gate 820 is provided on first molding surface 811 of mold portion 810 constituting the surface (rear surface 710b) of main body portion 710 of insulating member 700, resin can be injected from a portion close to the center of plate-shaped main body portion 710. This shortens the distance that resin flows within mold portion 810, making it easier for the resin to spread throughout mold portion 810. Furthermore, large gap portion 815 serves as a reservoir for the resin that has flowed into mold portion 810 from gate 820, improving the fluidity of the resin within mold portion 810 and shortening the time it takes for the resin to spread throughout mold portion 810.

[0070] The resin filled in the mold part 810 cools to form the insulating member 700. When filling of the resin into the mold part 810 is completed, the gate 820 is closed by the valve. At this time, resin remains near the gate 820, and this resin cools to become a gate mark 715. Thereafter, the mold 800 is separated, and the insulating member 700 is taken out from the inside.

[0071] In this way, the insulating member 700 shown in Figures 4(a) and (b) is completed. In the main body 710 of the insulating member 700, a protruding portion 714 is formed by filling a space between the protruding portion 813 and the recessed portion 814 of the mold portion 810 with resin. The tip portion of the protruding portion 714 is thicker than the other portions of the main body 710. A gate mark 715 protruding backward is formed on the recessed surface on the back side of the protruding portion 714.

[0072] <Effects of the embodiment> As described above, according to the present embodiment, the following effects are achieved.

[0073] First bus bar 500 includes bent portions 540 that are bent at right angles to first overlapping portion 511 from each of the opposing left and right ends of first overlapping portion 511, and through holes 515 that are formed in first overlapping portion 511 and contact each of bent portions 540. Insulating member 700 includes clamping portion 720 that has first contact portion 721 that contacts bent portion 540 from the outside of first bus bar 500, and second contact portion 722 that passes through through hole 515 and contacts bent portion 540 from the inside of first bus bar 500, and clamps each bent portion 540 between first contact portion 721 and second contact portion 722.

[0074] According to this configuration, in the front-to-rear direction where first overlapping portion 511 overlaps insulating member 700, the range where first contact portion 721 and second contact portion 722 contact bent portion 540 from both sides can be made longer, and therefore the force that holds first bus bar 500 in the front-to-rear direction generated in insulating member 700 can be increased. As a result, first bus bar 500 is less likely to move in the front-to-rear direction, and first bus bar 500 can be stably positioned in the front-to-rear direction relative to insulating member 700.

[0075] In addition, first contact portion 721 and second contact portion 722 have a first rib 721a and a second rib 722a extending in the front-rear direction formed on the surface facing bent portion 540, and first rib 721a and second rib 722a come into contact with bent portion 540.

[0076] According to this configuration, by pressing the bent portion 540 between the first rib 721a and the second rib 722a, the bent portion 540 can be inserted smoothly between the first contact portion 721 and the second contact portion 722, and the first contact portion 721 and the second contact portion 722 can be reliably brought into contact with the bent portion 540.

[0077] Furthermore, the first contact portion 721 and the second contact portion 722 each have a shape that is elongated in the vertical direction.

[0078] According to this configuration, the clamping range of clamping portion 720 can be made longer in the up-down direction, so that bent portion 540 can be firmly clamped by clamping portion 720. This allows first bus bar 500 to be stably positioned with respect to insulating member 700 in the left-right direction.

[0079] Furthermore, a first contact portion 721 is formed on each of the opposing left and right ends of the insulating member 700, and the dimension of the first contact portion 721 is smaller than the dimension of the second contact portion 722 in the left-right direction.

[0080] The larger the left-right dimensions of the first contact portion 721 and the second contact portion 722, the stronger the overall clamping portion 720. On the other hand, when the first contact portion 721 is formed at the left and right ends of the insulating member 700, the larger the left-right dimension of the first contact portion 721, the larger the left-right dimension of the insulating member 700.

[0081] According to this configuration, the dimension of the first contact portion 721 in the left-right direction can be made relatively small, and the dimension of the second contact portion 722 can be made relatively large, so that an increase in the left-right dimension of the insulating member 700 can be suppressed while suppressing a decrease in the strength of the clamping portion 720 as a whole.

[0082] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and application examples of the present invention can be modified in various ways in addition to the above embodiment.

[0083] For example, in the above embodiment, first rib 721a and second rib 722a are formed on first contact portion 721 and second contact portion 722 of clamping portion 720, respectively. However, as shown in FIG. 9, first rib 721a and second rib 722a do not have to be formed on first contact portion 721 and second contact portion 722, respectively. In this case, the gap between first contact portion 721 and second contact portion 722 is set to be equal to the thickness (dimension in the left-right direction) of bent portion 540 of first bus bar 500. However, extremely high precision is required to manufacture first bus bar 500 and insulating member 700 such that the gap between first contact portion 721 and second contact portion 722 is equal to the thickness of bent portion 540 of first bus bar 500. Therefore, in order to easily manufacture first bus bar 500 and insulating member 700, it is desirable to form first rib 721a and second rib 722a on first contact portion 721 and second contact portion 722, respectively.

[0084] In the above embodiment, the positioning structure including the bent portion 540 and the clamping portion 720 is applied only between the first bus bar 500 and the insulating member 700. However, as shown in FIG. 10, the positioning structure including the bent portion 640 and the clamping portion 730 may also be applied between the second bus bar 600 and the insulating member 700. In this case, the second bus bar 600 is provided with the bent portion 640 that is bent at a right angle to the main body portion 610 from each of the left end and the right end of the second overlapping portion 611 of the main body portion 610. In addition, the second overlapping portion 611 is formed with a through hole 615 that contacts the bent portion 640. The insulating member 700 is provided with the clamping portions 730 at each of the left end and the right end on the rear surface 710b side of the main body portion 710.

[0085] The clamping portion 730 is configured by a first contact portion 731 having two first ribs 731a and a second contact portion 732 having one second rib 732a. The left and right bent portions 640 are clamped by the left and right clamping portions 730. This allows the second bus bar 600 to be positioned in the front-rear and left-right directions with respect to the insulating member 700. The clamping portion 730 may be configured such that the first rib 731a and the second rib 732a are not formed on the first contact portion 731 and the second contact portion 732, respectively, similar to the configuration shown in FIG.

[0086] Although a positioning structure using bent portion 640 and clamping portion 730 is applied between second bus bar 600 and insulating member 700, a configuration in which a positioning structure using bent portion 540 and clamping portion 720 is not applied between first bus bar 500 and insulating member 700 may also be adopted.

[0087] Furthermore, the number of first ribs 721a of the first contact portion 721 and the number of second ribs 722a of the second contact portion 722 are not limited to those in the above embodiment, and may be changed as appropriate.

[0088] Furthermore, in the above embodiment, first bus bar 500 is positioned in the front-rear and left-right directions with respect to insulating member 700 by bending portion 540 and clamping portion 720. However, bending portion 540 and clamping portion 720 may be configured so that first bus bar 500 is positioned not only in the front-rear and left-right directions with respect to insulating member 700, but also in the up-down direction. For example, by forming ribs at the upper and lower ends of second contact portion 722 of clamping portion 720 that contact the upper and lower edges of through hole 515, respectively, it becomes possible to position first bus bar 500 in the up-down direction. Similarly, in the modification shown in FIG. 10, bending portion 640 and clamping portion 730 may be configured so that second bus bar 600 is positioned not only in the front-rear and left-right directions with respect to insulating member 700, but also in the up-down direction.

[0089] Furthermore, in the above embodiment, the vertical dimension of first contact portion 721 is larger than the vertical dimension of second contact portion 722, and the left-right dimension of first contact portion 721 is smaller than the left-right dimension of second contact portion 722. However, the vertical dimensions and left-right dimensions of first contact portion 721 and second contact portion 722 may be equal to each other.

[0090] Furthermore, in the above embodiment, the bent portion 540 extends in the up-down direction from the first overlapping portion 511 to the non-overlapping portion 512. However, the bent portion 540 may not extend to the non-overlapping portion 512, and it is sufficient that the bent portion 540 is bent relative to the first overlapping portion 511 so as to have at least a length in the up-down direction that allows it to be sandwiched by the sandwiching portion 720.

[0091] Furthermore, in the above embodiment, the film capacitor 1 is provided with one capacitor element 400. However, the number of capacitor elements 400 may be two or more, and may be changed as appropriate.

[0092] Furthermore, in the above embodiment, capacitor element 400 is formed by stacking two metallized films having aluminum vapor-deposited on a dielectric film, and then rolling or laminating the stacked metallized films. Alternatively, capacitor elements 400 may be formed by stacking a metallized film having aluminum vapor-deposited on both sides of a dielectric film and an insulating film, and then rolling or laminating the stacked metallized films.

[0093] Furthermore, in the above embodiment, the film capacitor 1 is given as an example of the capacitor of the present invention. However, the present invention can be applied to capacitors other than the film capacitor 1.

[0094] In addition, the embodiments of the present invention can be modified in various ways as appropriate within the scope of the technical ideas set forth in the claims.

[0095] In addition, in the description of the above embodiment, terms indicating directions such as "upper" and "lower" indicate relative directions that depend only on the relative positional relationship of the components, and do not indicate absolute directions such as the vertical direction or the horizontal direction. [Industrial Applicability]

[0096] The present invention is useful for capacitors used in various electronic devices, electric devices, industrial devices, vehicle electrical equipment, and the like. [Explanation of symbols]

[0097] 1. Film capacitor (capacitor) 400 Capacitor element 500 1st bus bar 511 First Polymerization Section 515 Through hole 540 Bend section 600 2nd bus bar 611 Second Polymerization Section 700 Insulating materials 720 Clamping part 721 1st contact part 721a 1st Rib 722 2nd contact part 722a 2nd Rib

Claims

1. A capacitor element; a first bus bar and a second bus bar connected to the capacitor element; an insulating member disposed between the first bus bar and the second bus bar, the first bus bar includes a flat first overlap portion, the second bus bar includes a flat second overlap portion, The first polymerization portion and the second polymerization portion overlap each other, the insulating member is disposed between the first overlapping portion and the second overlapping portion and provides insulation between the first overlapping portion and the second overlapping portion; At least one of the first bus bar and the second bus bar is a bent portion bent at a right angle to the overlapping portion from each of two opposing ends of the overlapping portion of at least one of the first overlapping portion and the second overlapping portion; A through hole formed in the overlapping portion and contacting the bent portion, the insulating member includes a clamping portion that clamps the bent portion, the clamping portion has a first contact portion that contacts the bent portion from an outer side of the at least one bus bar, and a second contact portion that passes through the through hole and contacts the bent portion from an inner side of the at least one bus bar, and the first contact portion and the second contact portion clamp the bent portion. A capacitor characterized by:

2. 2. The capacitor according to claim 1, A first rib is formed on a surface of the first contact portion facing the bent portion, the first rib extending in a direction in which the first overlapping portion, the second overlapping portion, and the insulating member overlap, a second rib extending in the overlapping direction is formed on a surface of the second contact portion facing the bent portion, The first rib and the second rib contact the bent portion. A capacitor characterized by:

3. The capacitor according to claim 1 or 2, Each of the first contact portion and the second contact portion has a shape in which a dimension in a direction perpendicular to an overlapping direction in which the first overlapping portion, the second overlapping portion, and the insulating member overlap and a clamping direction in which the clamping portion clamps the bent portion is longer than the dimensions in the overlapping direction and the clamping direction. A capacitor characterized by:

4. The capacitor according to any one of claims 1 to 3, the first contact portion is formed at each of two opposing ends of the insulating member; a dimension of the first contact portion is smaller than a dimension of the second contact portion in a clamping direction in which the clamping portion clamps the bent portion, A capacitor characterized by:

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