JP3240653B2 - Mounting structure of electrolytic capacitor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mounting structure of the electrolytic capacitor that enables mounting without using the mounting band.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4 of Japanese Unexamined Utility Model Publication No. 63-107980, "Packaging Box for Electrolytic Capacitors", means for attaching the electrolytic capacitor itself to a member to be mounted has conventionally been used. The mounting band is provided around the outer case. Therefore, when an electrolytic capacitor is mounted on a circuit device or the like, it is fixed to a chassis or a substrate of the circuit device or the like by using two or three mounting pieces radially protruding from a mounting band. .

[0003]

In mounting an electrolytic capacitor using such a mounting band, a mounting band which is a separate component from the electrolytic capacitor is used, and several screws and nuts are used. However, the mounting structure becomes complicated, the mounting work becomes complicated, and the screwing portion protrudes to the side of the electrolytic capacitor, and the space for the screwing work is required. There are drawbacks such as low. Such disadvantages become more prominent in proportion to the increase in the number of installed electrolytic capacitors.

As a mounting structure of such a capacitor which does not depend on a band, for example, Japanese Unexamined Utility Model Publication No.
No. 4 “Capacitor mounting structure” is available. In this example, the electrode terminal is used as a fixing means, and in an installation place where vibration or impact force is applied, the stress acts on the electrode terminal to reduce the performance of the electrolytic capacitor or cause inconvenience such as damage. is there.

For this reason, Japanese Patent Application Laid-Open No. 3-58406 proposes "Electrolytic capacitor and its mounting structure". This electrolytic capacitor and its mounting structure make it easy to mount the electrolytic capacitor and improve the earthquake resistance. ing.

[0006] Therefore, the present invention is to provide a simplified mounting structure and the mounting operation, and an object thereof is to provide a mounting structure for electrolytic capacitors with enhanced earthquake resistance and mounting efficiency.

[0007]

SUMMARY OF THE INVENTION The electrolytic capacitor of the present invention
In the mounting structure of (1), the engaging projection (8) is
The electrode terminals (10, 1, 1) are formed from the upper surface of the engagement protrusion.
2) a plurality of electrolytic capacitors protruding, and these electrolytic capacitors
It is installed on the wall surface side of the engaging projection of the capacitor and the
A plurality of engagement recesses (9) sandwiching only the collision portion are formed.
First and second mounting plates (36, 38),
And a second mounting plate sandwiching the engagement protrusion between the engagement recesses.
Fixing means (fixing bolt 40 and fixing
And a nut 44) .

[0008] The mounting structure smell of the electrolytic capacitor of the present invention
Further, the engaging projection has a prismatic shape.

[0009]

The present invention is used for the mounting structure of the electrolytic capacitor of the present invention.
The electrolytic capacitor has an engagement projection formed on the upper surface of the sealing plate, and is capable of engaging with the engagement recess of the first and second mounting plates . Therefore, in this electrolytic capacitor, it can be fixed to each mounting plate with the engaging projection. Also, as an incidental effect due to the formation of the engaging projection on the sealing plate, the thickness of the sealing plate is increased by the engaging projection, and the mechanical strength of the sealing plate is increased by that much, so that the exterior The portion accommodated in the case can be reduced. That is, it is expected that the ratio of the sealing plate to the outer case is reduced and the volume efficiency is improved.

[0010] In the mounting structure of the electrolytic capacitor of the present invention, the plurality of electrolytic capacitors having an engagement projection on the sealing plate, in correspondence with the electrolytic capacitor to be fixed with corresponding engagement protrusion engaged First and second formed with a concave portion
Mounting plate . The engagement recesses formed in each mounting plate are located at positions corresponding to the engagement protrusions on the electrolytic capacitor side,
It will correspond to the spacing and shape. And each mounting
Engaging the engaging protrusion with the engaging recess of the plate, the engaging protrusion first及
A plurality of electrolytic capacitors can be mounted by sandwiching the mounting plates with the second mounting plate and fixing each mounting plate with fixing means. Accordingly, in this mounting structure, double
A number of electrolytic capacitors can be firmly fixed with the first and second mounting plates and fixing means. In addition, such a mounting structure has a small number of parts, has a simple structure, is easy and simple to perform a mounting operation, and can realize a mounting state with excellent earthquake resistance.

[0011]

EXAMPLES Hereinafter, the mounting structure of the electrolytic capacitor of the present invention with reference to embodiments shown in the drawings will be described in detail.

FIGS. 1 and 2 show an electrolytic capacitor according to the present invention.
2 shows an embodiment of an electrolytic capacitor using the mounting structure of FIG. In this electrolytic capacitor, a cylindrical outer case 2 made of a metal such as aluminum is used, and its opening is closed with a sealing plate 4. The outer surface is covered with an insulating sleeve 6 made of a heat-shrinkable synthetic resin for protection and insulation. Although the embodiment uses a metal plate for the outer case 2, the outer case 2 made of a synthetic resin may be used.

On the outer surface of the sealing plate 4, an engaging projection 8 having a prismatic shape is formed, through which an anode-side electrode terminal 10 and a cathode-side electrode terminal 12 penetrate. Let me do it. That is, the engagement projection 8 forms a part of the sealing plate 4 and penetrates and includes the electrode terminal.

FIG. 3 is a sectional view taken along line AA of FIG. A cylindrical capacitor element 14 is housed inside the outer case 2. Capacitor element 14
As is well known, is wound in a column shape with a separator paper sandwiched between the electrode foils on the anode side and the cathode side, and is prevented from being unwound by a tape 16 around its periphery. Further, on the end face of the capacitor element 14, tabs 18 and 20 for connecting the anode and cathode electrodes connected to the wound anode and cathode electrode foils are drawn out. Riveted terminals are used for the electrode terminals 10 and 12, and the tab 18 is electrically connected to the electrode terminal 10 and the tab 20 is electrically connected to the electrode terminal 12 by caulking.

A step 22 having a small diameter portion is formed on the opening side of the outer case 2 in which the capacitor element 14 is to be accommodated by external rolling.
2, a sealing plate 4 for sealing the outer case 2 is inserted. The sealing plate 4 has a shape conforming to the opening of the outer case 2 with a hard insulating plate such as a thermosetting synthetic resin.
For example, it is formed into a disk shape.

The sealing plate 4 is formed with a circular flat portion 26 which is parallel to the rear surface and has a circular flat portion 26. A concave portion 28 is formed around the flat portion 26, and an inner surface of the concave portion 28 is formed. Are formed with a V-shaped ridge or the like. An elastic ring 30 made of rubber or the like is fitted into the concave portion 28, and the opening end of the outer case 2 curved by the curling process is cut into the elastic ring 30.
Therefore, the outer case 2 is sealed between the end portion of the outer case 2 and the step portion 22 with the elastic ring 30 interposed therebetween and the sealing plate 4 is fixed, so that sufficient sealing is performed. Airtightness is obtained.

On the flat portion 26 of the sealing plate 4, an end of the insulating sleeve 6 covering the outer peripheral surface of the outer case 2 is provided. The insulating sleeve 6 has a cylindrical shape made of a heat-shrinkable synthetic resin, and is covered with a protective plate 34 made of a synthetic resin or the like on the bottom surface side of the outer case 2.

Next, FIGS. 4 and 5 show the mounting structure of the electrolytic capacitor of the present invention. In this mounting structure, a pair of mounting plates 36 and 38 that are thinner than the height of the engaging projection 8 are used as mounting members. Each mounting plate 36, 38
It has a fixed width and a length corresponding to the number of electrolytic capacitors to be fixed, and is formed of an insulating synthetic resin plate or the like having sufficient mechanical strength. Then, the mounting plates 36, 38
In this embodiment, an engagement recess 9 corresponding to the shape of the engagement projection 8, that is, a corner in this embodiment, is formed. The engagement recess 9 is set at an interval corresponding to the installation interval of the electrolytic capacitor to be fixed. Have been. A through-hole 42 is formed in the end of the mounting plate 38 to allow a fixing bolt 40 as a fixing means to pass therethrough, and the other mounting plate 36 has a fixing nut 44 as a fixing hole.
Is embedded. The fixing nut 44 may be installed outside. If sufficient strength is obtained in the mounting plate 36, a through hole is formed in the mounting plate 36 side, and a fixing screw portion is formed therein. May be.

According to such a configuration, the engaging recesses 9 of the mounting plates 36, 38 are aligned with the respective engaging projections 8 of one or more electrolytic capacitors to be mounted, and the respective mounting plates 36, 38
The engaging projection 8 is sandwiched between the engaging recesses 9 of the
Each electrolytic capacitor can be fixed by tightening 38 with a fixing bolt 40 and a fixing nut 44 with a washer 41 interposed therebetween. In this case, each electrolytic capacitor can be maintained in a horizontal state by aligning each of the mounting plates 36 and 38 with the flat portion 26 of the sealing plate 4.

In the embodiment, the sizes of the electrolytic capacitors are equalized. However, if the engaging projections 8 are formed equally, electrolytic capacitors having different capacities or shapes in size can be arranged in parallel. It is.

Next, FIG. 6 shows an electrolytic capacitor of the present invention.
9 shows another embodiment of the electrolytic capacitor using the mounting structure . In the above embodiment, the engaging projection 8 is formed by a square prism, but in such a case, the electrode terminals 10,
It is convenient in terms of arrangement that the polarity discrimination of 12 is set separately and a display for that is attached. In this case, it is not possible to say that such display is necessary and that no error occurs in the mounting operation. Therefore, in the embodiment shown in FIG. 6, the shape of the engaging projection 8 is asymmetrical in correspondence with the polarities of the electrode terminals 10 and 12, that is, a shape that forms line symmetry around the electrode terminals 10 and 12. The electrode terminals 10 and 12 have rhombic shapes with corners 81 and 82 having different angles.
By doing so, the electrode terminals 1 are formed by the corners 81 and 82.
The polarities of 0 and 12 can be easily determined, and the fixing to the mounting plates 36 and 38 can be automatically performed by aligning the polarities by aligning the corners 81 and 82. In this case, the engaging recess 9 corresponding to the corner portion 81 and the mounting plate 38 are provided on the mounting plate 36 side.
It goes without saying that the engaging recess 9 corresponding to the corner 82 is formed on the side.

[0022]

As described above, according to the present invention,
The following effects are obtained. a. Only the engaging projection formed on the upper surface of the sealing plate is
In addition, a plurality of electrolytic capacitors can be easily attached using the second attachment plate . In addition, the mechanical strength of the sealing plate is increased by the formation of the engagement projection, and the ratio of the sealing plate to the outer case is reduced, so that the volume efficiency can be improved. b. The simplification of the structure and fixing means, the mounting work can be easily and faster, as compared with the conventional mounting structure using the mounting band or the like, it is possible to improve the simplicity and mounting efficiency, electrodes The terminal can be protected by the engagement projection, and the earthquake resistance can be improved. c. Slide the engaging projection formed on the top surface of the sealing plate into a prismatic shape.
Can be used to determine the polarity of the electrode terminals,
And increasing the engagement strength with the engagement recess of the second mounting plate.
it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of an electrolytic capacitor using a mounting structure for an electrolytic capacitor according to the present invention.

2 is a plan view of the electrolytic capacitor shown in Figure 1.

FIG. 3 is a sectional view taken along line AA of FIG. 2 ;

FIG. 4 is a partially cutaway plan view showing one embodiment of the mounting structure of the electrolytic capacitor of the present invention.

FIG. 5 is a side view showing a mounting structure of the electrolytic capacitor shown in FIG.

FIG. 6 is a plan view showing another embodiment of the electrolytic capacitor using the mounting structure of the electrolytic capacitor of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 4 Sealing plate 8 Engagement projection 9 Engagement concave part 10, 12 Electrode terminal 36 First mounting plate 38 Second mounting plate 40 Fixing bolt (fixing means) 44 Fixing nut (fixing means)

Claims (2)

(57) [Claims] An engaging projection is formed on an upper surface of a sealing plate.
Electrolysis with electrode terminals protruding from the upper surface of the engagement protrusion of
Capacitors and the electrolytic capacitors are installed on the wall side of the engagement protrusions.
And a plurality of engagement recesses sandwiching only the engagement protrusion are formed.
The first and second mounting plates, and the first and second mounting plates
An attachment structure for an electrolytic capacitor , comprising: fixing means for sandwiching and fixing a collision portion . 2. The method according to claim 1, wherein said engaging projection has a prismatic shape.
The mounting structure for an electrolytic capacitor according to claim 1, wherein