Film capacitor and its manufacturing method

Abstract

To prevent a connection terminal from being co-rotated by a fastening member in a film capacitor.SOLUTION: A lower side edge 3b of an arm portion 3d of a ground terminal 3A acts on a lower side stopper 1b and is positionally regulated, and the upper side edge 3c is positioned on the lower side in the storage direction Z than the upper side stopper 1c, and in a state in which a mounting surface 3a of the ground terminal 3A is brought into close contact with a mounting surface 1a of a mounting tab 1B by fastening with a fastening member 6, the lower side edge 3b and the upper side edge 3c of an arm portion 3d of the ground terminal 3A are positionally regulated by the lower side stopper 1b and the upper side stopper 1c, respectively.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a technique for fastening a connection terminal at an extending end of a bus bar extending from a capacitor element unit in a film capacitor to a mounting tab provided on an outer case using fastening members such as bolts and nuts. [Background technology]

[0002] 2. Description of the Related Art Film capacitors in which a capacitor element unit with bus bars is housed in an exterior case have been known (see Patent Document 1).

[0003] 11 to 13 are explanatory diagrams illustrating problems that arise when fastening the connection terminals of the bus bars to the mounting tabs of the exterior case.

[0004] 11(a), (b) to 12, the capacitor element unit 2 with the bus bar 3 is housed in the exterior case 1. The earth terminal (connection terminal) 3A at the extending end of the bus bar 3 approaches and is aligned with the mounting tab 1B provided on the exterior case 1 from above. Finally, as shown in Fig. 12, the mounting hole 3g of the earth terminal 3A is aligned (centered) with the mounting hole 1e of the mounting tab 1B, and the earth terminal 3A is fixed to the mounting tab 1B by a rotating fastening member (not shown) such as a bolt and nut that is inserted into the pair of mounting holes 1e, 3g. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2009-194281 A Summary of the Invention [Problem to be solved by the invention]

[0006] The ground terminal 3A is formed at an extension of the bus bar 3 composed of a thin conductive plate. Tightening of bolts and nuts in a rotary fastening member may cause the thin ground terminal 3A to rotate together and deform. To prevent such inconvenience, as shown in FIG. 13, it is virtually conceivable to provide stoppers 1b and 1c for preventing clockwise and counterclockwise rotation around the arm portion 3d of the ground terminal 3A at two locations, the lower side and the upper side.

[0007] That is, in the mounting tab 1B, there are a lower stopper 1b and an upper stopper 1c protruding from the mounting surface 1a thereof. The lower stopper 1b provided on the mounting tab 1B abuts (engages) against the lower side edge 3b (engagement notch) of the arm portion 3d of the ground terminal 3A to prevent unexpected rotation together in the counterclockwise direction. Further, the upper stopper 1c provided on the mounting tab 1B abuts (engages) against the upper side edge 3c (engagement notch) of the arm portion 3d to prevent unexpected rotation together in the clockwise direction.

[0008] However, it has been found that this virtual technology has the following problems. Since the surface direction of the mounting surface 1a of the mounting tab 1B is along the housing direction Z of the capacitor element unit 2 with respect to the exterior case 1, before the arm portion 3d of the ground terminal 3A is displaced in the housing direction Z and reaches a predetermined fastening and fixing position, the lower side edge 3b of the arm portion 3d abuts against the upper stopper 1c, and it cannot be moved to the predetermined fastening and fixing position.

[0009] On the other hand, when the ground terminal 3A can be brought close to the mounting tab 1B along a direction perpendicular to the paper surface in FIG. 13, by providing two stoppers 1b and 1c on the mounting surface 1a, the lower side edge 3b (engagement notch) of the arm portion 3d abuts (engages) against the stopper 1b to prevent unexpected rotation together in the counterclockwise direction, and the upper side edge 3c (engagement notch) of the arm portion 3d abuts (engages) against the stopper 1c to prevent unexpected rotation together in the clockwise direction.

[0010] However, if the planar direction of the mounting surface 1a of the mounting tab 1B is along the storage direction Z of the capacitor element unit 2 relative to the outer case 1, in other words, if the fastening direction of a rotary fastening member such as a bolt and nut is perpendicular to the planar direction of the mounting surface 1a (the direction in which the paper in Figure 13 is laid out), two stoppers 1b, 1c cannot be provided on the mounting surface 1a.

[0011] In other words, it is not possible to provide an upstream stopper 1c, and there is a problem in that the earth terminal 3A rotates together with the bolt and nut when they are tightened in a clockwise direction.

[0012] The present invention has been made in view of the above circumstances, and has an object to prevent a film capacitor from being subjected to the action of a fastening member rotating together with a connection terminal. [Means for solving the problem]

[0013] The present invention solves the above problems by taking the following measures.

[0014] The film capacitor according to the present invention has: The capacitor element unit housed in the exterior case has its main portion covered with molding resin, a mounting tab having a mounting surface aligned along a direction in which the capacitor element unit is housed in the outer case is provided on an outer surface of the outer case; a bus bar extending from the capacitor element unit to the outside of the exterior case, and a connection terminal at the extending end of the bus bar is provided with a mounting surface thereof aligned along a mounting surface of the mounting tab; the connection terminal is configured to be fastened to the mounting tab via a fastening member in a state in which the mounting surface faces the mounting surface of the mounting tab; a lower-side stopper that acts on a lower-side edge of the connection terminal in the storage direction when the connection terminal is displaced in the storage direction to restrict the position of the connection terminal, and an upper-side stopper that acts on a upper-side edge of the connection terminal in the storage direction in a position restricted state to restrict the position of the connection terminal, With respect to the protruding dimension of the mounting tab from the mounting surface, the protruding dimension of the upper stopper is set to be smaller than the protruding dimension of the lower stopper, When aligning the fastening and fixing of the attached surface of the connection terminal to the mounting surface of the mounting tab, the connection terminal is configured to be able to move along the storage direction through a clearance formed by the difference between the two protrusion dimensions.

[0015] Further, a method for producing a film capacitor according to the present invention includes the steps of: a capacitor element unit accommodated in an outer case has a major portion covered with molded resin, an outer surface of the outer case is provided with a mounting tab having an attachment surface aligned with a direction in which the capacitor element unit is accommodated in the outer case, a bus bar extending from the capacitor element unit extends to the outside of the outer case, a connection terminal on the extended end is provided with its attachment surface aligned with the attachment surface of the mounting tab, and the connection terminal is fastened to the mounting tab via a fastening member with the attachment surface facing the attachment surface of the mounting tab; a first step in which the connection terminal moves on the upper stopper to align an attached surface of the connection terminal with an attachment surface of the attachment tab, whereby the lower stopper acts on the lower edge of the connection terminal to regulate its position; and a second step in which the mounting surface of the connection terminal is brought into contact with the mounting surface of the mounting tab by fastening with the fastening member, and the lower side edge and the upper side edge of the connection terminal are respectively positioned by the lower side stopper and the upper side stopper.

[0016] According to the above-mentioned configuration of the present invention, the following effects are exhibited.

[0017] The projection dimension of the lower stopper from the mounting surface of the mounting tab is x 1 , the protruding dimension of the upper stopper is x 2 Then, x 1 x 2 The difference Δx between the two protruding dimensions is Δx=x 1 -x 2 It becomes.

[0018] The connection terminal on the free end side of the bus bar derived from the capacitor element unit is displaced in the storage direction (generally downward) through a clearance (gap space) corresponding to the difference Δx between both protruding dimensions. In the movement of the connection terminal along the storage direction through the clearance, the lower side edge of the connection terminal passes through the clearance without being interfered with by the protruding end of the upper side stopper, and the movement is stopped by the lower side stopper, thereby regulating the position.

[0019] From this aligned state, a fastening member is used to bring the mounting surface of the connection terminal into contact with the mounting surface of the mounting tab, and the connection terminal is fastened and fixed to the mounting tab, so that the lower and upper edges of the connection terminal are positioned by the lower and upper stoppers, respectively.

[0020] As a result, it is possible to reliably prevent the connection terminal from rotating together with the fastening member, and it is possible to achieve a desired high degree of accuracy in attachment of the connection terminal to the mounting tab.

[0021] The film capacitor of the present invention having the above-mentioned configuration has the following preferred embodiments and modifications.

[0022] [1] An arm portion is provided between the connection terminal and the vicinity of the extended end of the bus bar in a direction intersecting the storage direction, and the downstream side stopper acts on the downstream side edge of the arm portion in the storage direction to regulate the position of the connection terminal, and the upstream side stopper acts on the upstream side edge of the arm portion in the storage direction to regulate the position of the connection terminal.

[0023] [2] The lower side stopper and the upper side stopper are provided on the mounting surface of the mounting tab.

[0024] [3] Also, an engagement notch is recessed and formed on the lower side edge of the arm portion of the connection terminal to engage with a lower side stopper provided on the mounting surface of the mounting tab. Effect of the Invention

[0025] By preventing the connection terminal from rotating together with the fastening member, the connection terminal can be fixed satisfactorily and stably in a predetermined positional relationship with respect to the mounting tab, and deformation of the connection terminal can be prevented. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a perspective view showing the configuration of an outer case and a mounting tab of a film capacitor according to an embodiment of the present invention; [Diagram 2] FIG. 1 is a perspective view showing a configuration of a capacitor element unit and a bus bar including a ground terminal in a film capacitor according to an embodiment of the present invention; [Diagram 3] FIG. 1 is a perspective view showing a state in which a capacitor element unit with bus bars is housed in an exterior case in a film capacitor according to an embodiment of the present invention; [Figure 4] FIG. 1 is a perspective view showing a state in which a capacitor element unit has been completely accommodated in an exterior case and resin-molded in a film capacitor according to an embodiment of the present invention; [Diagram 5] FIG. 1 is a perspective view showing the relationship between a mounting tab and a ground terminal in a film capacitor according to an embodiment of the present invention; [Figure 6]FIG. 1 is a cross-sectional view showing a state in which a ground terminal is brought close to a mounting tab in a film capacitor according to an embodiment of the present invention. [Figure 7] FIG. 11 is a cross-sectional view showing the state immediately after the arm portion of the ground terminal is fitted into the lower side stopper in the film capacitor according to the embodiment of the present invention. [Figure 8] FIG. 11 is a cross-sectional view showing the state immediately after the arm portion of the ground terminal is fitted into the lower side stopper in the film capacitor according to the embodiment of the present invention. [Figure 9] FIG. 11 is a perspective view showing a state in which the ground terminal of the film capacitor according to the embodiment of the present invention slides in the direction opposite to Y and the arm of the ground terminal acts on the upstream stopper in addition to the downstream stopper; [Figure 10] 4 is a cross-sectional view for explaining an operation of moving a ground terminal close to a mounting tab in the film capacitor according to the embodiment of the present invention; [Figure 11] An explanatory diagram explaining the problem of fastening the ground terminal of the bus bar to the mounting tab of the outer case. [Figure 12] FIG. 1 is an explanatory diagram for explaining the problem. [Figure 13] FIG. 1 is an explanatory diagram for explaining the problem. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, the film capacitor of the present invention having the above-mentioned configuration will be described in detail with reference to specific examples.

[0028] 1 to 9, reference numeral 1 denotes an exterior case, 1A denotes a side plate portion of the exterior case 1, 1B denotes a mounting tab, 2 denotes a capacitor element unit, 3 denotes a bus bar, 4 denotes molded resin, 5 denotes a clearance, and 6 denotes a fastening member. 1A denotes a mounting tab provided on the outer surface of the exterior case 1, 1a denotes a mounting surface of the mounting tab 1B, 1b denotes a downstream stopper provided on the mounting tab 1B, and 1c denotes an upstream stopper provided on the mounting tab 1B.

[0029] As shown in Fig. 1, the exterior case 1 is configured in a box shape with an opening 1f at the top, and the capacitor element unit 2 with the bus bar 3 shown in Fig. 2 is accommodated in the internal space of the exterior case 1 through the upper opening 1f as shown in Fig. 3. Z indicates the direction in which the capacitor element unit 2 is accommodated in the exterior case 1 (normally downward). Fig. 4 shows the fully accommodated state.

[0030] A mounting tab 1B is provided on the outer surface of a side plate portion 1A of the exterior case 1. A mounting surface 1a of this mounting tab 1B is formed in a state along the storage direction Z of the capacitor element unit 2. The mounting surface 1a is a vertical surface.

[0031] 2, the capacitor element unit 2 is composed of a set of multiple capacitor elements 2a or a single capacitor element 2a. In this embodiment, the capacitor element unit 2 is a set of large-sized, large-capacity capacitor elements 2a and small-sized, small-capacity capacitor elements 2a.

[0032] As shown in FIG. 2, the bus bar 3 is led out from the electrode surface of the axial end surface of the capacitor element unit 2 and further extends to the outside of the exterior case 1, with an earth terminal 3A provided on the extended end side (described in detail later).

[0033] The earth terminal (connection terminal) 3A at the end of the bus bar 3 extending outside the exterior case 1 has a surface facing the mounting surface 1a of the mounting tab 1B as a mounting surface 3a (FIG. 10). That is, the mounting surface 3a of the earth terminal 3A is oriented in a parallel manner to the mounting surface 1a of the mounting tab 1B. The mounting surface 3a is a vertical surface, and both the mounting surface 1a and the mounting surface 3a are aligned along the storage direction Z of the capacitor element unit 2.

[0034] As shown in FIG. 4, the capacitor element unit 2 housed in the exterior case 1 has its main parts, including part of the bus bar 3, covered with molded resin 4 (see dashed double-dashed line), which positions it within the exterior case 1 and protects it from moisture and vibration.

[0035] The bus bar 3 has a complex shape in that its base side is inside the exterior case 1, its extending end side earth terminal 3A is outside the exterior case 1, and the mounting surface 3a is aligned along the storage direction Z, i.e., the vertical direction.

[0036] The shape of bus bar 3 from its base (the connection portion with capacitor element 2a) to earth terminal 3A at its extended end is as follows.

[0037] As shown in FIG. 5, the first plate portion 3e 1 , the plate surface is the first plate portion 3e 1 The second plate portion 3e is bent 90 degrees from the vertical position. 2 , the plate surface is the second plate portion 3e 2 A third plate portion 3e having a vertical posture bent upward by 90 degrees on the same plate surface as the above. 3 , the plate surface is the third plate portion 3e 3 The fourth plate portion 3e is bent 90 degrees from the case outward in a horizontal position. 4 , the plate surface is the fourth plate portion 3e 4 The fifth plate portion 3e is bent 90 degrees downward from the vertical position. 5 , the plate surface is the fifth plate portion 3e 5 The sixth plate portion 3e is bent 90 degrees from the outside of the case in a vertical position. 6 It has.

[0038] 1st plate part 3e 1 and the second plate portion 3e 2 and the third plate portion 3e 3 The lower portion of the third plate portion 3e is present inside the exterior case 1 and is covered with a molded resin 4. 3 The upper portion of the third plate portion 3e protrudes upward from the mold resin 4. 3 and the fourth plate portion 3e in a horizontal position. 4 and the fifth plate portion 3e in a vertical position. 5 The hook portion 3f is adapted to straddle and engage with the side plate 1A of the outer case 1 and is fixed in position relative to the outer case 1, as shown in FIGS.

[0039] 5th plate part 3e5 corresponds to the vicinity of the extending end of the bus bar 3, and the ground terminal 3A corresponds to the extending end of the bus bar 3. However, the fifth plate portion 3e 5 and the sixth plate portion 3e that connects the lower end portion of the earth terminal 3A 6 constitutes the arm portion 3d of the ground terminal 3A. The protruding direction of this arm portion 3d extends in a direction that intersects and forms a right angle with respect to the housing direction Z of the capacitor element unit 2 and the side plate portion 1A of the exterior case 1 (the first horizontal direction X away from the side plate portion 1A).

[0040] The lower edge 3b and the upper edge 3c of the arm portion 3d of the ground terminal 3A in the housing direction Z have the following relationship with respect to the lower stopper 1b and the upper stopper 1c in the mounting tab 1B of the exterior case 1 described above.

[0041] As shown in FIGS. 4, 6, 7, and 9, when the capacitor element unit 2 with the bus bar 3 is moved along the housing direction Z and housed in the exterior case 1, the hook portion 3f on the bus bar 3 is fitted so as to straddle the side plate portion 1A of the exterior case 1. In this case, the arm portion 3d of the ground terminal 3A also moves in the housing direction Z at the same time. During the movement, as shown in FIG. 7, the lower edge 3b of the arm portion 3d acts on the lower stopper 1b in the mounting tab 1B to stop the movement and is positionally restricted in the housing direction Z. In this positionally restricted state, alignment is performed so that the mounting hole 3g of the ground terminal 3A is concentric with the mounting hole 1e of the mounting tab 1B.

[0042] In the case of this embodiment, in the positional restriction of the lower stopper 1b with respect to the lower edge 3b of the arm portion 3d of the ground terminal 3A described above, an engaging notch 3b that recesses upward is formed in the lower edge 3b. 1 Therefore, when the pair of mounting holes 1e and 3g are aligned, the engaging notch 3b of the lower edge 3b of the arm portion 3d of the ground terminal 3A 1engages with a lower stopper 1b of the mounting tab 1B. As a result, the position of the ground terminal 3A is restricted in the storage direction Z, and at the same time, the position is restricted in the first horizontal direction X perpendicular to the side plate portion 1A of the exterior case 1. This allows the pair of mounting holes 1e, 3g to be aligned with high precision in two dimensions (Z direction × X direction).

[0043] However, if alignment in the first horizontal direction X can be achieved by other means, the engagement notch 3b 1 is not necessarily required.

[0044] When the earth terminal 3A is displaced (moved) in the storage direction Z during the above-mentioned alignment, the earth terminal 3A is designed as follows to ensure that its displacement is not hindered by the upper-side stopper 1c, which is higher than the lower-side stopper 1b.

[0045] Both the lower-side stopper 1b and the upper-side stopper 1c of the mounting tab 1B protrude from the mounting surface 1a in the second horizontal direction Y, but the protruding dimensions are different. That is, the protruding dimension of the upper-side stopper 1c is configured to be smaller than the protruding dimension of the lower-side stopper 1b.

[0046] The difference Δx between the two protruding dimensions is [protruding dimension x of the lower stopper 1b] 1 ]-[Protrusion dimension of upper stopper x 2 ] (Δx=x 1 -x 2 ). Here, the difference Δx between the two protruding dimensions is designed to be larger than the plate thickness of the earth terminal 3A. That is, as shown in Fig. 10, a clearance (gap space) 5 larger than the difference Δx between the two protruding dimensions is formed between the protruding tip surface of the lower side stopper 1b and the protruding tip surface of the upper side stopper 1c in the Y direction.

[0047] Since the ground terminal 3A is displaced in the storage direction Z through this clearance 5, the attached surface 3a of the ground terminal 3A passes through the inside of the clearance 5. In other words, the lower edge 3b of the arm 3d of the ground terminal 3A passes through an internal position of the clearance 5 without being interfered with by the protruding end of the upper stopper 1c (the protruding end does not become an obstacle), and the displacement of the arm 3d of the ground terminal 3A is not hindered by the upper stopper 1c.

[0048] In addition, the upstream stopper 1c is formed at an incline so that the Y-direction dimension (protruding height) gradually increases along the entry direction (Z direction) of the earth terminal 3A, so that the earth terminal 3A reaches the downstream stopper 1b while being guided by the upstream stopper 1c.

[0049] The downward displacement of the ground terminal 3A causes the arm 3d (more specifically, the engagement notch 3b 1 ) acts on the downstream stopper 1b as described above, stopping further downward displacement and regulating the position (see FIG. 7). As a result, the alignment of the mounting surface 1a of the mounting tab 1B to the mounted surface 3a of the ground terminal 3A for fastening and fixing (alignment of the pair of mounting holes 1e, 3g) is completed.

[0050] However, in this state (Figures 7, 8, and 10(c)), the mounting surface 3a of the earth terminal 3A is not yet in contact with the mounting surface 1a of the mounting tab 1B, and is spaced apart by a distance greater than the protruding dimension of the upper stopper 1c.

[0051] On the other hand, in this state, the upper edge 3c of the arm 3d of the ground terminal 3A reaches a position lower than the effective stop edge, which is the lower end edge of the upper stopper 1c, in the storage direction Z. Therefore, the arm 3d of the ground terminal 3A is in a position that allows displacement in a direction that brings its attached surface 3a closer to the attachment surface 1a of the attachment tab 1B.

[0052] In the state shown in Figures 7, 8 and 10(c), the mounting hole 3g of the ground terminal 3A is aligned (centered) with the mounting hole 1e of the mounting tab 1B in the two-dimensional direction. 1 is engaged with the lower stopper 1b and is positioned so as to be regulated, but is still able to slide in the opposite Y direction. The upper edge 3c of the arm 3d is located slightly below the lower edge (effective stop action edge) of the upper stopper 1c, allowing displacement in the opposite Y direction.

[0053] A rotary fastening member 6 is used as a means for fastening and fixing the ground terminal 3A to the mounting tab 1B, and in this embodiment, as shown in FIG. 9, this is constituted by a combination of a bolt 6a and a nut 6b.

[0054] The fastening member 6 acts in opposite directions depending on whether it is rotated clockwise or counterclockwise, tightening in one direction and loosening in the other, but a forcing action that tries to rotate the arm 3d of the earth terminal 3A together with the terminal when it is rotated clockwise or counterclockwise is performed, but this is prevented by the following function. When the mounted surface 3a of the earth terminal 3A is abutted against the mounting surface 1a of the mounting tab 1B in a specified aligned state by the fastening member 6, the lower edge 3b of the arm 3d of the earth terminal 3A acts on (or is very close to) the lower stopper 1b to restrict its position, and the upper edge 3c of the arm 3d of the earth terminal 3A acts on (or is very close to) the upper stopper 1c to restrict its position. As a result, the above-mentioned "forcing action attempting to rotate the arm 3d of the earth terminal 3A in a co-rotating manner" is suppressed, and co-rotation of the arm 3d of the earth terminal 3A can be reliably prevented both when tightened (when rotated clockwise or counterclockwise) and when loosened (when rotated counterclockwise or clockwise).

[0055] Specifically, a bolt 6a is inserted in the counter-Y direction into a pair of mounting holes 1e, 3g that are aligned in the two-dimensional direction, and a nut 6b is screwed onto the male threaded portion at the tip of the bolt 6a that passes through the pair of mounting holes 1e, 3g and tightened, thereby fastening the earth terminal 3A to the mounting tab 1B with the mounted surface 3a abutting (contacting) the mounting surface 1a, as shown in Figures 9 and 10(d).

[0056] In this fastening, the engagement notch 3b of the arm 3d of the ground terminal 3A 1 While remaining engaged with the lower stopper 1b, the upper edge 3c of the arm 3d slides under the lower edge, which is the effective stopping edge, of the upper stopper 1c, and the upward displacement of the arm 3d is restricted. As a result, the earth terminal 3A is restricted from unexpectedly rotating in the clockwise direction around the axis of the bolt 6a (see Figures 9 and 10(d)).

[0057] Also, the engagement notch 3b in the arm portion 3d of the ground terminal 3A 1 is engaged with the downstream stopper 1b, the arm is prevented from accidentally rotating counterclockwise when the bolt 6a is loosened. Furthermore, this engagement method also prevents displacement in the X direction, ensuring that the pair of mounting holes 1e, 3g are kept aligned.

[0058] In the above embodiment, the arm portion 3d of the earth terminal 3A is engaged with the upper side stopper 1c and the lower side stopper 1b to regulate its position, but this is not limited to the arm portion 3d, and other portions of the earth terminal 3A may be engaged.

[0059] In the above embodiment, the ground terminal 3A is fastened to the mounting tab 1B, but the present invention is not limited to this and can be applied to any connection terminal that is connected to the mounting tab 1B. [Industrial Applicability]

[0060] The present invention is useful as a technology in which the mounting surface of the mounting tab is aligned along the storage direction of the capacitor element unit, and the bus bar connection terminal is fixed favorably and stably in a specified positional relationship with the case mounting tab, thereby preventing deformation of the connection terminal. [Explanation of symbols]

[0061] 1 Outer case 1B Mounting tab 1a Mounting surface 1b Downward stopper 1c Upper stopper 2 Capacitor element unit 3 Busbar 3A connection terminal (earth terminal) 3a Mounting surface 3b Inferior margin 3b 1 Engagement notch 3c Superior margin 3d Arm of connection terminal (earth terminal) 4. Mold Resin 5. Clearance 6 Fastening members Z Storage direction of capacitor element unit

Claims

1. The capacitor element unit housed in the exterior case has its main portion covered with molding resin, a mounting tab having a mounting surface aligned along a direction in which the capacitor element unit is housed in the outer case is provided on an outer surface of the outer case; a bus bar extending from the capacitor element unit to the outside of the exterior case, and a connection terminal at the extended end is provided with its mounting surface aligned along the mounting surface of the mounting tab; the connection terminal is configured to be fastened to the mounting tab via a fastening member in a state in which the mounting surface faces the mounting surface of the mounting tab; a lower-side stopper that acts on a lower-side edge of the connection terminal in the storage direction when the connection terminal is displaced in the storage direction to restrict the position of the connection terminal, and an upper-side stopper that acts on a upper-side edge of the connection terminal in the storage direction in a position restricted state to restrict the position of the connection terminal, With respect to the protruding dimension of the mounting tab from the mounting surface, the protruding dimension of the upper stopper is set to be smaller than the protruding dimension of the lower stopper, A film capacitor characterized in that, when aligning the fastening and fixing of the mounting surface of the connection terminal to the mounting surface of the mounting tab, the connection terminal is configured to be able to move along the storage direction through a clearance formed by the difference between the two protrusion dimensions.

2. an arm portion is provided between the connection terminal and a vicinity of an extending end of the bus bar, the arm portion being arranged in a direction intersecting with the housing direction; A film capacitor as described in claim 1, wherein the lower-side stopper acts on the lower-side edge of the arm portion in the storage direction to regulate the position of the connection terminal, and the upper-side stopper acts on the upper-side edge of the arm portion in the storage direction to regulate the position of the connection terminal.

3. 3. The film capacitor according to claim 1, wherein the lower stopper and the upper stopper are provided on a mounting surface of the mounting tab.

4. 4. A film capacitor as described in claim 2 or claim 3, wherein an engagement notch is recessed into the lower edge of the arm portion of the connection terminal to engage with a lower stopper provided on the mounting surface of the mounting tab.

5. a main portion of the capacitor element unit accommodated in the outer case is covered with a molding resin, and an attachment tab having an attachment surface aligned with a direction in which the capacitor element unit is accommodated in the outer case is provided on an outer surface of the outer case; a bus bar derived from the capacitor element unit extends to the outside of the exterior case, and a connection terminal at the extended end is provided with its mounting surface aligned along the mounting surface of the mounting tab, and the connection terminal is configured to be fastened to the mounting tab via a fastening member with the mounting surface facing the mounting surface of the mounting tab, a lower stopper provided on the outer case for restricting the position of the connection terminal by acting on a lower edge of the connection terminal in the housing direction when the connection terminal is displaced in the housing direction; a top stopper that acts on a top edge of the connection terminal in the housing direction to restrict the position of the connection terminal in a position restricted state, a first step of moving the connection terminal on the upper stopper to align the mounting surface of the connection terminal with the mounting surface of the mounting tab, so that the lower stopper acts on a lower edge of the connection terminal to regulate its position; a second step in which the mounting surface of the connection terminal is brought into contact with the mounting surface of the mounting tab by fastening with the fastening member, so that the lower side edge and the upper side edge of the connection terminal are positioned by the lower side stopper and the upper side stopper, respectively; A method for manufacturing a film capacitor comprising the steps of:

Images