JP2005353894A - Enclosed capacitor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an enclosed capacitor that improves vibration resistance, can be manufactured easily, can be easily positioned on a substrate to be used, and especially is suited for the unit configuration of a plurality of capacitors. <P>SOLUTION: In the enclosed capacitor that is fixed to an external mount body at a bottom side and the other locations; a projection is provided at the center of the bottom of the capacitor case, and a fitting member that is fitted to the projection and has a recessed section and a through hole corresponding to the projection having a collar section at the bottom side of the capacitor case can be fitted also to a recess or a hole provided at the external mount body. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cased capacitor that is fixed to a mounting body such as a housing or a substrate. In particular, the present invention relates to a cased capacitor suitable for making a plurality of capacitors into a unit configuration.

Conventionally, when attaching a cased capacitor to a mounting body such as a housing or a board, as shown in FIG. There is a method in which a through hole 15 into which a stud bolt part can be inserted is provided in the mounting body 11 in advance, and the mounting body 11 is fixed using a nut 16 or the like from the opposite direction of the bottom surface of the case.
Further, as shown in FIG. 7, a hole slightly larger than the diameter of the capacitor case 1 is formed in the mounting body 11 such as a housing or a substrate, and a metal or resin band-like fixing called a mounting leg 8 is formed on the side surface of the capacitor. There is a method of attaching parts and fixing the attachment legs 8 to the attachment body 11 by screwing or soldering.
When a plurality of capacitors are unitized, in addition to the method of simply arranging a plurality of capacitors by the above-described mounting method, as shown in FIG. 8, the parallel capacitors 13 are connected by two mounting plates 18 via rubber plates 17. There is a sandwiching method (for example, Patent Document 1).
Japanese Utility Model Publication No. 7-22536

In the stud bolt case, the position of the capacitor in the case can be positioned at the center because the stud bolt part is inserted into the through hole of the mounting body such as the housing or the board, but the position direction of the lead terminal of the capacitor is Since the cased capacitor is rotated and fixed by screw tightening, the capacitor rotates excessively as the screw is tightened, and the position direction of the lead terminal may not be determined. Moreover, since it fixes with a nut etc. from the opposite side of the bottom part of a capacitor | condenser with a case, sufficient work space is needed for screwing using tools, such as a wrench and a spanner. Further, it is necessary to match either the diameter of the stud bolt or the diameter of the insertion hole provided in the mounting body, which is easily restricted in design. In addition, since the stud bolt part is integrated with the case, it may be necessary to use an insulating material for the mounting body, the fixing nut, and the like.
The fixing of the capacitor bottom in the so-called stud bolt case type as shown in FIG. 6 and the fixing by attaching the mounting leg fixing parts to the side of the capacitor as shown in FIG. Is not advantageous, so fixing in two places by these two methods is also conceivable. However, the number of screwing parts increases, the work becomes complicated, and if there are two screwing parts, the stress is biased to the weaker one of the screwing parts due to the dimensional error of the mounting body, etc. In some cases, vibration fatigue accumulates at the base of the steel and the worst case occurs. As shown in FIG. 8, the method of simply sandwiching capacitors in parallel with two mounting plates via a rubber plate does not cause the complexity of assembling workability or the adverse effects of screwing in two places, but vibration resistance is required. Not suitable for the place.

  The present invention provides a capacitor with a mounting body that is easy to manufacture and can be easily positioned on a substrate to be used while improving the above-described drawbacks and improving vibration resistance. In particular, the present invention provides a cased capacitor suitable for a unit configuration of a plurality of capacitors. The present invention also provides a cased capacitor that is optimal for unitization of an elongated capacitor.

In order to solve the above-described problem, the present invention provides a case-containing capacitor that is fixed to the attachment body at the bottom surface side and other locations, and a protrusion provided at the center of the case bottom surface, and a case bottom surface side. A flange portion, a recess portion or a through-hole portion corresponding to the protrusion portion, and a fitting member that fits into the protrusion portion and fits into the recess portion or hole portion provided in the attachment body. The capacitor | condenser with a case characterized by is provided.
Further, in the case-containing capacitor that is fixed to the attachment body at the bottom surface side and other places, a protrusion provided at the center portion of the case bottom surface and a flange portion at the case bottom surface side correspond to the protrusion portion. A recessed member or a through hole is provided to fit the protrusion, and a fitting member that fits into a recess or a hole provided in the attachment body, and the periphery of the flange and the case are integrally covered. The present invention provides a cased capacitor having a heat-shrinkable sleeve.

As described above, according to the present invention, when fixing at two locations advantageous for earthquake resistance, the fixing work can be simplified and fixed to the mounting body because of a combination of fixing such as normal screwing and fitting fixing. Unreasonable.
Further, since the fitting of the case bottom to the attachment body is performed via a fitting member, vibration fatigue that accumulates at the root of the stud bolt such as the stud bolt case is unlikely to occur. In addition, the design of the capacitor portion and the mounting body design of the fitting portion are easy to adjust. Also, if an insulating material is used for the fitting member, it is possible to ensure insulation against the mounting body, and further, since the fitting member is provided with a flange portion, it is possible to further ensure insulation, and against vibration in the capacitor axial direction. The vibration can be more effectively improved.
Further, when the periphery of the flange portion provided on the fitting member and the capacitor case are integrally covered with the insulating sleeve, the vibration resistance is improved and the fitting member does not slide off from the bottom surface of the capacitor.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a cross-sectional view of an example of a cased capacitor of the present invention, and FIG. 2 shows a side view thereof.
Reference numeral 1 denotes a case having a bottomed column shape, in which a capacitor element 2 is accommodated. The capacitor element 2 is obtained by winding an anode foil and a cathode foil with electrolytic paper interposed therebetween. Moreover, you may use the element of the structure of winding metallized paper and metallized film which vacuum-deposited. The case is not particularly limited, but is selected from metals such as aluminum, iron, copper, titanium, magnesium, and alloys thereof that are less corrosive and have excellent ductility and malleability. The case 1 is bent at the upper part in a ring shape to fix the lid 3. The case 1 may be covered with an insulating resin or the like. The lid 3 is made of insulating resin such as polyphenylin sulfide, phenol, or polypropylene, and has a structure in which lead terminals 4 are drawn out through the lid 3. The case 1 is covered with a heat shrink sleeve 5. The heat-shrink sleeve 5 is selected from tube-like ones that are shrinkable by heat, such as vinyl chloride, polyethylene terephthalate, and polyolefin. The purpose of the heat-shrink sleeve 5 in this case is for insulation coating in the case of a metal case and for label printing. The heat-shrink sleeve is heated at about 150 to 250 ° C., for about 10 to 60 seconds, and is heated with hot air from a heat gun. In the case of a plurality of capacitors, the hot air heat shrinkage can be processed continuously or collectively in a belt line or a batch tank.

  Reference numeral 6 denotes a protrusion provided at the center of the bottom surface of the case 1, which may have a cylindrical shape, a conical shape, a flat shape, a square shape, or the like, and may be subjected to processing such as threading or knurling. The protrusion 6 may be provided with a separate member by welding or screw joining, but is preferably provided integrally with the case.

Reference numeral 7 denotes a fitting member provided on the bottom surface of the case 1, which is provided with a recess or a through-hole portion that fits into the protruding portion 6 provided on the bottom surface of the case and that fits into a concave portion or a hole portion provided in the mounting body. Make the outline. It is formed in a cylindrical shape, a cone shape, a flat shape, a square shape or the like according to the hole shape, but it is preferable that the outer shape is a circular body and the center of the circle coincides with the center of the case from the viewpoint of easy adjustment in the external terminal direction. Processing such as threading and knurling may be performed. And the collar part 8 is provided in the case bottom face side when a fitting member is fitted. FIG. 3 shows a perspective view of the fitting member.
The fitting member 7 may be a metal material, but an insulating resin is preferable when insulation to an attachment body such as a housing or a substrate is required, and polybutylene terephthalate, polypropylene, polyphenylin sulfide, or the like is used. It is done. In addition to molding, the fitting member 7 can be manufactured by a method of punching a sheet in accordance with the outer dimensions, and having a two-piece structure of a flange portion and a main body portion. A three-sheet structure in which rubber plates are laminated may be used.
Moreover, you may provide some or all of the fitting members 7 previously in the recessed part or hole part side which a corresponding attachment body fits.

  Reference numeral 9 denotes a mounting leg, which is a conventional band-shaped fixing part made of metal, insulating resin, or the like, and is attached to the periphery of the case on the side of the case 1 and away from the bottom of the case, or to the outer surface of the capacitor lid 3.

FIG. 4 shows a cross-sectional view of another embodiment of the cased capacitor of the present invention.
The heat shrink sleeve 5 integrally covers the periphery of the flange portion 8 of the fitting member 7 and the case 1. The heat-shrinkable sleeve 5 is selected from tube-like ones that are shrinkable by heat, such as vinyl chloride, polyethylene terephthalate, polyolefin, etc., but those that have a small change rate in the length direction before and after heating are selected from the viewpoint of dimensional stability. It is. In order to cope with a high temperature of 105 ° C. or higher, a cross-linked polyolefin using an electron beam is preferable. In the case of a metal case, the exposed part of the case can be covered with the heat shrink sleeve at the same time. Further, the heat shrink sleeve may be laminated by appropriately selecting the material for covering the case, fixing the cover, or printing the label, the material, the film thickness, the covering range, or the like. Further, when a heat shrink sleeve with an adhesive is used on the inner surface, the fixing strength is improved.

FIG. 5 shows an example in which a plurality of capacitors of the present invention are arranged side by side.
Each capacitor 13 with a mounting leg is inserted into a hole provided in the upper mounting body 11a of the mounting body separated by the stand 10, and the fitting member 7 is fitted into the hole provided in the lower mounting body 11b. Next, the mounting legs 9 and the upper mounting body 11a are fixed with screws 12. Alternatively, the mounting leg 9 may be temporarily fixed to the upper mounting body 11a before the capacitor 13 is mounted on the mounting body and rotated in the direction of the target lead terminal, and then fixed with each screw.

It is sectional drawing of embodiment of this invention. It is a side view of FIG. 1 of this invention. The fitting member is shown by the perspective view of embodiment of this invention. It is sectional drawing of another embodiment of this invention. It is an example of unitization of embodiment of this invention. It is sectional drawing of a prior art example. It is another sectional view of a conventional example. It is an example of unitization of a prior art example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Case, 2 ... Capacitor element, 3 ... Cover, 4 ... Lead terminal, 5 ... Heat-shrink sleeve, 6 ... Projection part, 7 ... Fitting member, 8 ... Collar part, 9 ... Mounting leg, 10 ... Stand, 11 DESCRIPTION OF SYMBOLS ... Attachment body, 11a ... Upper attachment body, 11b ... Lower attachment body, 12 ... Screw, 13 ... Capacitor, 14 ... Threaded protrusion, 15 ... Through-hole, 16 ... Nut, 17 ... Rubber plate, 18 ... Mounting plate

Claims (2)

In a cased capacitor that is fixed to the mounting body at the bottom and other locations
A protrusion provided at the bottom center of the case;
A fitting member which is provided with a flange on the bottom surface side of the case, is provided with a recess or a through hole corresponding to the protrusion, is fitted into the protrusion, and is fitted into a recess or hole provided in the mounting body. When,
Cased capacitor characterized by having In a cased capacitor that is fixed to the mounting body at the bottom side and other locations,
A protrusion provided at the bottom center of the case;
A fitting member which is provided with a flange on the bottom surface side of the case, is provided with a recess or a through hole corresponding to the protrusion, is fitted into the protrusion, and is fitted into a recess or hole provided in the mounting body. When,
A heat shrink sleeve that integrally covers the periphery of the brim portion and the case;
Cased capacitor characterized by having

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