JPH0974042A - Device for fixing electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain a stable fixed state by fixing the reverse-tapered surface of a lower mounting tool to the taper surface of a cylindrical electronic component in surface contact and placing the recessed or projecting surface of the upper mounting tool to the projecting or recessed part of the cylindrical electronic component. SOLUTION: A taper 6 is formed on the bottom surface side of a case 5 and a projecting part 7 is formed on the outer surface at the opposite side of the taper 6. After housing a capacitor element 1 in the case 5, the opening edge of the case 5 is closed by winding and clamping and an insulation sleeve 8 is covered before heat shrinkage and adhesion to a capacitor. A cylindrical part 10 where an inverse taper 9 which matches the taper 6 is formed from the bottom surface side of the electrolytic capacitor and a lower mounting tool 12 with a flange 11 which is in one piece with the cylindrical part 10 are engaged. Also, a cylindrical part 14 where a recessed part 13 is formed and an upper mounting tool 16 with a flange 15 are engaged from the hole-sealing plate aide of the electrolytic capacitor and the flange 1 and the flange 15 of the lower mounting tool 12 are mounted to a mounting plate 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for fixing a large electronic component used in a power supply device or the like, such as an electrolytic capacitor.

[0002]

2. Description of the Related Art Large electronic components such as screw terminal type aluminum electrolytic capacitors are liable to be loosened due to vibration and damage to fixtures due to their heavy weight, and an insulating sleeve covering the capacitors and the like. There was a problem that the insulation was deteriorated due to the damage of.

As proposals for solving these problems, for example, Japanese Patent Laid-Open No. 5-283267 and Japanese Utility Model Laid-Open No. 5-7.
There is a technique described in Japanese Patent No. 9935. That is, the technique described in Japanese Patent Application Laid-Open No. 5-283267 is a combination of first and second mounting members made of insulating resin, and the first mounting member has a U-shaped cutout portion on the upper portion thereof and a thickness direction. Is tapered toward the upper end, and the second fixture is for tightening the upper part of the first fixture, and the inner wall of the upper part is tapered such that it becomes thinner as it goes downward in the thickness direction. The first and second attachments are combined and fixed. In the tightening by this means, the taper of the first fitting for tightening the electronic component is tightened by the second fitting fitted to the outer periphery thereof, so that the contact between the electronic component and the inner surface of the first fitting is
There is a drawback that the fixing strength is low because the line contact that tightens the outer periphery of the electronic component is likely to occur.

In the technique disclosed in Japanese Utility Model Laid-Open No. 5-79935, a capacitor-sealing-side receptor is inserted from the sealing portion side of a screw terminal type capacitor, and a capacitor-bottom-side receiving body is fitted from the bottom surface side of the capacitor. The capacitor mounting body and the mounting auxiliary body that support both ends of the are fixed with screws. With this technology, several capacitors and other capacitors are assembled as a bank, so several capacitors are fixed inside the capacitor sealing side receptor and bottom side receptor, so the middle is flexible and the fixing state is unstable. May be. In particular, it becomes remarkable when vibration is applied. Also, since several other banks are attached and fixed as banks, there is the inconvenience of disassembling and replacing all of the defective products, for example.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the problems of the prior art as described above, and is a large electronic component used in a power supply device or the like, such as an electrolytic capacitor. Is firmly fixed to maintain a stable fixed state even when an external force such as vibration is applied, and to improve the insulating property.

[0006]

In order to solve the above-mentioned problems of the prior art, the invention according to claim 1 has a taper on the outer circumference having a smaller diameter with respect to the bottom surface and a taper on the opposite side of the taper. A cylindrical electronic component provided with a convex portion or a concave portion, a cylindrical portion having a concave surface or a convex surface corresponding to the convex portion or the concave portion on the inner surface, and an upper mount having a flange integral with the cylindrical portion, and formed on the inner surface A lower mounting fixture having a cylindrical portion formed with an inverse taper that matches a taper provided on the electronic component and a flange integral with the cylindrical portion, and a flange of the lower mounting fixture and a flange of the upper mounting fixture; It is a fixing device for electronic components that are tightened. According to the first aspect of the invention, the reverse taper surface of the lower fixture is fixed in surface contact with the taper surface of the cylindrical electronic component. Further, by covering the convex portion or the concave portion of the cylindrical electronic component with the concave surface or the convex surface of the upper fixture, the vertical movement of the cylindrical electronic component is restricted.

According to a second aspect of the present invention, in the electronic component fixing device according to the first aspect, the projections or recesses provided on the outer periphery of the cylindrical electronic component are provided continuously or discontinuously. To do. In the invention according to the second aspect, when the convex portion or the concave portion is discontinuously provided, it is possible to obtain an effect that the movement of the cylindrical electronic component in the rotational direction can be prevented.

According to a third aspect of the present invention, in the electronic component fixing device according to the first or second aspect, an upper cylinder is provided on the opposite side of the cylindrical portion having a reverse taper provided in the lower fixture with a flange interposed therebetween. A portion is provided, and the upper cylindrical portion is interposed between the outer peripheral surface of the electronic component and the upper mounting member, and the flange of the upper mounting member and the flange of the lower mounting member are fastened. In the invention according to claim 3, the upper mount and the lower mount are fixed by tightening the respective flanges with mounting screws such as screws and bolts. However, the lower mount is not provided with the upper cylindrical portion. Since the creeping distance between the mounting screw and the electronic component case can be increased, the effect of ensuring insulation can be obtained.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments corresponding to the inventions of claims 1 to 3 will be described below by taking an electrolytic capacitor as an example.

As shown in FIG. 1, an electrolytic capacitor element 1
Is connected to the rivet 3 of the sealing plate 2, and the rivet 3 is electrically connected to an external terminal 4 such as a screw. The capacitor element 1 is housed in a case 5, which has a taper 6 formed on the bottom surface side and a convex portion 7 formed on the outer surface on the opposite side of the taper 6. After accommodating the capacitor element 1 in the case 5, the opening edge of the case 5 was wound and sealed. This electrolytic capacitor is covered with an insulating sleeve 8 made of vinyl chloride,
It was heat-shrinked and brought into close contact with the capacitor. A lower mount 12 having a cylindrical portion 10 formed with an inverse taper 9 that matches the taper 6 of the case 5 from the bottom surface side of such an electrolytic capacitor, and a flange 11 integral with the cylindrical portion 10.
I fitted it. Further, from the sealing plate side of the electrolytic capacitor, a cylindrical portion 14 having a concave portion 13 corresponding to the convex portion 7 formed on the case 5 and an upper fitting 16 having a flange 15 integral with the cylindrical portion 14 are fitted, and the lower portion is attached. The flange 11 of the fixture 12 and the flange 15 of the upper fixture 16 were fastened with screws 17 and nuts 18 and attached to the attachment plate 19.

In the fixing device for electronic parts constructed as described above, the reverse taper 9 of the cylindrical portion 10 of the lower mounting member 12 that matches the taper 6 provided on the case 5 makes surface contact, and the case 5 moves vertically. Inhibits movement and rotation. Further, the concave portion 13 corresponding to the convex portion 7 formed on the case 5 prevents the case 5 from moving upward. Then, by tightening the flange 11 of the lower attachment 12 and the flange 15 of the upper attachment 16 with the screw 17 and the nut 18, the taper 6 and the convex portion 7 are tightened up and down,
Therefore, the frictional force in the vertical direction and the rotational direction of the taper 6 increases, and the fixing force is strengthened.

Although the case 5 is provided with the convex portion 7 in the above description, the case 5 may be provided with a concave portion and the upper attachment 16 may be provided with a convex portion corresponding to the concave portion. Further, in the above, the structure in which the convex portion 7 or the concave portion 13 provided on the case 5 is formed on the entire circumference of the case 5 has been described, but the convex portion 7 or the concave portion 13 is provided intermittently or discontinuously. When the concave portion or the convex portion is provided in the capacitor, it is possible to prevent the external force in the rotating direction from being applied to the capacitor.

Further, although the case where the taper 6 is provided at a part of the height of the body portion on the bottom surface side of the case 5 has been described above, the taper 6 is formed up to the bottom surface of the case, and the taper 6 is reversed to match the taper 6. Even if the taper 9 is formed on the lower attachment 12, the same effect can be obtained.

As another embodiment, as shown in FIG. 2, an upper cylindrical portion 20 is provided on the opposite side of a cylindrical portion 10 having a reverse taper 9 of a lower fitting 12 with a flange 11 interposed therebetween. In the case of the structure in which the upper attachment is arranged from above the portion 20, the creeping distance between the screws such as the screws 17 and the nut 18 for attachment and the case 5 becomes long, so that the insulating property can be improved.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a fixing device for an electronic component according to the present invention.

FIG. 2 is a front sectional view showing another embodiment of an electronic component fixing device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Capacitor element 2 ... Sealing plate 3 ... Rivet 4 ... External terminal 5 ... Case 6 ... Taper 7 ... Convex part 8 ... Insulation sleeve 9 ... Reverse taper 10 ... Cylindrical part 11 ... Flange 12 ... Lower mounting tool 13 ... Recessed part 14 ... Cylindrical part 15 ... Flange 16 ... Upper fitting 19 ... Mounting plate 20 ... Upper cylindrical part

Claims (3)

[Claims] 1. A cylindrical electronic component having a taper on its outer circumference, which has a smaller diameter with respect to the bottom surface side, and a convex portion or a concave portion on the opposite side of the taper, and a concave surface or convex surface corresponding to the convex portion or the concave portion on the inner surface. An upper mount having a formed cylindrical portion and a flange integral with the cylindrical portion, and a cylindrical portion formed on the inner surface and having an inverse taper that matches the taper provided on the electronic component and a flange integral with the cylindrical portion. A fixing device for an electronic component, comprising: a lower mount, and a flange of the lower mount and a flange of the upper mount. 2. The fixing device for an electronic component according to claim 1, wherein the convex portion or the concave portion is provided continuously or discontinuously on the outer circumference. 3. An upper cylindrical portion is provided on the opposite side of a cylindrical portion having an inverse taper provided on the lower mounting member with a flange sandwiched between the outer peripheral surface of the electronic component and the upper mounting member. The fixing device for an electronic component according to claim 1 or 2, wherein the flange of the upper mount and the flange of the lower mount are fastened by interposing them.