JP2005340341A - Capacitor equipped with mounting leg - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a capacitor equipped with mounting leg wherein upon a mounting leg being mounted on a capacitor equipped with a metal case, mounting directions of an external terminal and the mounting leg can be defined without permitting the capacitor to rotate, and the mounting leg is simplified in its constitution to obtain enough fixing strength and a working method is simplified. <P>SOLUTION: The mounting leg including a cutout in one end thereof and a flange is fitted to the surrounding of a case in which a capacitor element is accommodated, and a heat contraction sleeve is covered around the cutout part and heat-shrunk to fix the mounting leg and the capacitor. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a capacitor with a mounting leg that is used in an electronic device or an industrial device and has a mounting leg for mounting on the device to be used, and particularly relates to a capacitor with a mounting leg in a case.

  Conventionally, when attaching the mounting leg to the capacitor, as shown in FIG. 7, using the tapered shape, the outer mounting leg 16 is fitted into the inner mounting leg 15, and the notch provided at the fitting portion of the inner mounting leg 15 is used. There is a method of pressing the portion 6 against a capacitor and fixing the capacitor to a mounting leg (for example, Patent Document 1).

Further, as shown in FIG. 8, there is a method in which a groove 17 is provided around the case 1 and a protrusion 18 provided on an elastic arm (approximate to a notch) of the mounting leg is fitted into the groove 17. In order to prevent rotation, there is a method of binding the elastic arm of the mounting leg with a binding band 19 (for example, Patent Document 2).
JP-A-6-36964 JP-A-5-198457

  However, in the method of fixing the capacitor to the mounting leg using the two mounting legs of Patent Document 1, the number of molds for the mounting leg is increased, and the mutual accuracy between the tapered shapes of the mounting legs is also required. In addition, the method of providing grooves around the case in Patent Document 2 is not a sufficient fixing method, and a binding band is used because the capacitor is easy to rotate. However, it is necessary to individually bind each capacitor. In addition, in general, it is unavoidable that manual work is required, so that individual strength is likely to vary.

In order to solve the above problems, the present invention provides a capacitor with a mounting leg, a capacitor in which a capacitor element is housed in a case, a cutout at least at one end and a flange, and a fitting that fits around the case Provided is a capacitor with a mounting leg, comprising: a leg; and a heat-shrink sleeve for fixing the mounting leg and the capacitor by heat shrinking at least over the notch.
Further, the present invention provides the capacitor with a mounting leg, wherein a claw portion is provided on the inner surface of the cutout portion of the mounting leg.
A lid provided on the case; a cover at the end on the lid side; a mounting leg provided with a notch at the opposite end and a flange; a surface of the lid; and the cover And a fixing part or a pawl portion that prevents relative rotation with respect to the surface of the part.

As described above, according to the present invention, since the capacitor is fixed to the mounting leg by one mounting leg, the mold of the mounting leg does not increase, and there is no mutual accuracy between the mounting legs. In addition, since the heat treatment is fixed, a plurality of capacitors can be fixed to the mounting legs simultaneously or continuously without being fixed individually for each capacitor as in a binding band, so that individual differences in fixing strength are not easily generated.
In addition, since the large area can be uniformly reduced as compared with a string material such as a binding band, the notch portion of the mounting leg is easy to contact the case on the surface, and can be stably fixed.
When a metal is used as the case, an insulation heat shrink sleeve for insulation is generally covered. However, this sleeve and the fixing sleeve of the present invention can be used together, and the number of parts can be reduced accordingly.
Further, by providing the claw portion on the inner surface of the cutout portion of the mounting leg, the case is folded so that the claw portion is in close contact with the case side when the sleeve is contracted, thereby improving the fixing strength between the case and the mounting leg.
In addition, the mounting surface of the mounting leg is provided by including a fixture or a fixing part that prevents the surface of the cover provided on the case and the surface of the cover of the mounting leg from rotating relatively, that is, prevents the capacitor from rotating. Position and terminal lead position can be easily determined.

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 the capacitor of the present invention.
Reference numeral 1 denotes a case having a bottomed column shape, in which a capacitor element (not shown) is accommodated. In this capacitor element, an anode foil and a cathode foil are wound around electrolytic paper. Moreover, as a capacitor | condenser element, you may use the thing of the structure which wound metallized paper and metallized film which carried out vacuum evaporation, etc. The material of case 1 is a case made of a metal material, and is not particularly limited. However, it is less corrosive and has excellent ductility and malleability, such as aluminum, iron, copper, titanium, magnesium, and alloys thereof are selected. . In some cases, plastic may be used.
Reference numeral 2 denotes a pair of lead terminals drawn out of the case from the capacitor element.
Reference numeral 3 denotes a mounting leg that is fitted around the side surface of the case 1. The mounting leg 3 is provided with a flange portion 4, and the flange portion 4 is provided with an attachment hole portion 5. A notch 6 is provided at one end or both ends of the mounting leg 3 to facilitate deformation. The cutout portion 6 refers to the range of the cutout portion and the entire remaining portion. The material of the mounting leg 3 may be metal or the like depending on the case, but in general, a resin that can be injection-molded and has an insulating property is good, and is attached to the equipment used and is not damaged by vibration. Polybutylene terephthalate And polyphenylin sulfide, polypropylene, polyphenylene ether, phenol and the like.

Reference numeral 7 denotes a heat shrink sleeve, which is selected from tube-like ones that shrink by heat, such as vinyl chloride, polyethylene terephthalate, and polyolefin. From the viewpoint of dimensional stability, those having a small rate of change in the length direction before and after heating are selected. In addition, a cross-linked polyolefin using an electron beam or the like is preferable for handling a high temperature of 105 ° C. or higher. This heat-shrink sleeve is disposed so as to surround at least the cutout portion 6, contracted by hot air or the like by a heat gun, deformed, and pressed against the case 1 and fixed. In the case of a metal case, the exposed portions of the case that cannot be covered with the mounting legs and that reach the side and bottom surfaces can be simultaneously covered with the heat shrink sleeve. Further, the heat shrink sleeve may be laminated by appropriately selecting the material, film thickness, coverage, etc., for case covering, fixing, or label printing. In addition, if a heat-shrink sleeve with an adhesive is used on the inner surface, the step between the notched portion and the remaining portion can be effectively filled, so that the fixing strength of the legs and the anti-rotation of the capacitor are improved. .
The heat shrink sleeve is heated at about 150 to 250 ° C. and for about 10 to 60 seconds. 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.
A protrusion may be provided on the inner surface of the remaining portion of the cutout portion 6, and a groove may be provided in the opposite surface portion on the case side to be tightened with the heat shrink sleeve 7 after fitting.

  FIG. 2 shows a cross-sectional view of an example of improving the fixing strength of the capacitor of the present invention. By providing a claw portion 8 (pointed protrusion) on the inner surface of the remaining portion of the notch portion of the mounting leg, a folded portion can be formed in the case 1 so that the claw portion 8 closely contacts the corresponding portion side of the case when the sleeve is contracted. Thus, the fixing strength between the case and the mounting leg is improved, and the rotation of the capacitor can be prevented.

  FIG. 3 to FIG. 6 are cross-sectional views of an improved example in which the case is a cylinder and includes a fixture or a pawl portion that prevents the capacitor of the present invention from rotating particularly. In addition, these fixtures or pawl portions are located at positions deviating from the center of rotation, and one or more are provided.

  In FIG. 3, a cover portion 9 is provided at the upper end opposite to the notch portion of the mounting leg 3, and at least one penetration through the cover portion 9 at the position of the lead terminal 2 at the same level as the cross section of the lead terminal. A method is shown in which a portion 10 is provided to prevent the capacitor from rotating by penetrating the lead terminal 2. FIG. 4 shows a top view of FIG. It is also possible to cover the entire upper end portion of the mounting leg 3 other than the lead terminal portion. The penetrating part 10 is for regulating the rotation direction of the capacitor, and any shape that regulates in that direction may be used.

  5 and 6 show an example of a capacitor in which a capacitor element 11 is placed in a metal case 1a and sealed with a lid 12 made of an insulating resin such as polypropylene, polyphenylin sulfide, and phenol. The lead terminal 2 is structured to be pulled out through the lid 12. In addition, when a capacitor | condenser element is accommodated in a case and it fills with insulating resin, such as an epoxy resin, this filling body becomes a substitute of a lid | cover.

  FIG. 5 shows that a convex portion (or a concave portion) is provided on the bottom surface of the cover portion 9 at the upper end portion opposite to the notch portion of the mounting leg 3, and a concave portion (or convex portion corresponding to the convex portion is provided on the upper surface of the cover. ) Is shown.

  FIG. 6 shows a method of providing a fixing tool 14 by screwing or the like on the upper surface of the lid 12 directly below the cover portion 9 at the upper end portion opposite to the notch portion of the mounting leg 3. Pins such as wedges are also acceptable.

It is sectional drawing of embodiment of this invention. It is sectional drawing of another embodiment of this invention. It is sectional drawing of another embodiment of this invention. FIG. 4 is a top view of FIG. 3. It is sectional drawing of another embodiment of this invention. It is sectional drawing of another embodiment of this invention. It is sectional drawing of a prior art example. It is another sectional view of a conventional example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Case, 1a ... Metal case, 2 ... Lead terminal, 3 ... Mounting leg, 4 ... Cover part, 5 ... Mounting hole part, 6 ... Notch part, 7 ... Heat-shrink sleeve, 8 ... Claw part, 9 ... Cover , 10 ... penetrating part, 11 ... capacitor element, 12 ... lid, 13 ... pawl part, 14 ... fixing tool, 15 ... internal mounting leg, 16 ... external mounting leg, 17 ... groove, 18 ... projection, 19 ... binding band.

Claims (3)

For capacitors with mounting legs,
A capacitor containing a capacitor element in a case;
At least one end portion is provided with a notch and a flange is provided, and a mounting leg that fits around the case;
A heat-shrink sleeve that covers at least the notch and heat-shrinks to fix the mounting leg and the capacitor;
A capacitor with a mounting leg.   The capacitor with a mounting leg according to claim 1, wherein a claw portion is provided on an inner surface of the cutout portion of the mounting leg. A lid provided on the case;
A cover portion is provided at the lid side end portion, a cutout portion is provided at the opposite end portion, and a mounting leg provided with a flange portion;
A fixture or a pawl portion that prevents relative rotation between the surface of the lid and the surface of the cover portion;
The capacitor with a mounting leg according to claim 1.

Images