JPS5910738Y2 - Capacitor mounting structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for a capacitor, such as a large cylindrical aluminum electrolytic capacitor, which requires a fixing device for mounting.

Cylindrical capacitors are used in various electronic devices, and in particular, a large number of large cylindrical capacitors are used in power supply circuits, DC power supplies, electric motors, and the like.

Since it is impossible for such a large cylindrical capacitor to support the capacitor body only by its terminals, it is generally attached to a printed circuit board or other substrate using a fixture.

FIG. 1 is a perspective view for explaining the conventional mounting state of such a large cylindrical capacitor, and A shows an example in which the cylindrical capacitor is mounted upright with the end face facing the board. The opening shows an example in which a cylindrical capacitor is mounted horizontally so that part of its circumferential surface faces the board.

In the figure, 1 is a capacitor, 2 is a board, 3 is a fixture,
4 and 4' are screws.

Conventional capacitor installation uses a fixing device 3 made of a band-shaped metal plate with a snap-fastening portion, the band-shaped portion is wrapped around the circumferential surface of the capacitor, and tightened with a screw, and the fixing device 3 is attached to the screw. 4 or a separately provided screw 4' to attach it to the board 2.

Such a conventional capacitor mounting structure requires a large space for mounting each capacitor with its own fixing tool, and has the drawbacks of poor workability.

This invention was made to improve the above-mentioned drawbacks.
Our objective is to provide an improved capacitor mounting structure that reduces the space required for mounting and improves workability by mounting multiple cylindrical capacitors with one fixture. do.

FIG. 2 is a sectional view showing an embodiment of the capacitor mounting structure of the present invention, and the same reference numerals as in FIG. 1 indicate the same parts.

In this embodiment, four containers 1, consisting of two cylindrical containers 1 with large diameters and two cylindrical containers 1 with small diameters, are divided into two groups, and a part of their circumferential surface is divided into two groups. are arranged so as to be in contact with the substrate 2, the large diameter capacitors 1 and the small diameter capacitors 1 are in contact with each other within the group, and the capacitors 1 of the small diameter are arranged with the above mentioned interval between the groups, with the small diameter capacitors 1 being on the outside respectively. There is.

The substrate 2 has a length, which has a width smaller than the diameter of the container 1 and longer than the axial length of the container 1, located directly below the center line of the cylinder of the container 1 in the part where the container 1 is arranged. A notch-shaped groove 21 having a width is formed.

The fixture 3 is formed of a single strip-shaped metal plate, and the metal plate has a central portion 31 that is flat across the width of the strip, with a length slightly smaller than the certain interval. A tapped hole is formed in the center, and both sides 32 of the central part 31 are machined into a curved shape along the upper half of the circumferential surface of the large diameter container 1, and further, both sides 32' is processed into a curved shape slightly shorter than the upper half of the circumferential surface of the small-diameter capacitor 1, and furthermore, the curved surface 32 on both sides thereof is
'' is machined into a plane parallel to the arrangement direction of the four capacitors 1, and one tapped hole is formed in the center of the plane, that is, on each side 32''.

As mentioned above, in the present invention, since the notch-shaped groove 21 is provided, which has a width smaller than the diameter of the capacitor 1 and is longer than the axial length of the capacitor 1, the capacitor 1 can be inserted into the groove 21. Drop this capacitor 1
The circumferential surface of the groove 21 can be supported by being brought into contact with both ends of the groove 21 in the width direction.

Therefore, when the capacitor 1 is arranged on the substrate 2,
The groove 21 provided in the substrate 2 allows it to be fixed in the direction of the substrate surface, making its positioning easy.
This provides the advantage of improved workability.

Moreover, when the capacitor 1 is dropped into the groove 21, the circumferential surface of the capacitor 1 is in contact with and supported on both ends of the groove 21 in the width direction over almost the entire length in the axial direction. Therefore, the container 1 is reliably positioned and fixed on the substrate 2 without wobbling or misalignment.

Also, in this embodiment, three mounting screws 4 are used, but it is also possible to install using only one of the l screws 4 at the center part 31 or the two screws 4 at both sides 32''. Even if there is only one screw 4 in the central portion 31, the container 1 will not rotate together with the fixture 3 about the screw 4 due to the groove 21 provided in the substrate 2.

Therefore, the work of tightening and fixing the capacitor 1 using the fixture 3 becomes easy, and the capacitor 1 is positioned and fixed with high precision.

Furthermore, by making the width of the groove 21 close to the diameter of the container 1, the height of the main body of the container 1 from the surface of the substrate 2 can be kept low, and it is also possible to reduce the three-dimensional space. , it is also possible to adjust the height of capacitors with a variety of different diameters.

In this way, by lowering the mounting position of the capacitor 1, the electrical connection of the capacitor 1 can be directly connected to the pattern provided on the board 2 by bending the terminal without using a lead wire. It also becomes possible.

Furthermore, since the groove 21 has a width smaller than the diameter of the capacitor 1 and has a notch shape longer than the axial length of the capacitor 1, when the width of the groove 21 is set to the same size within the above conditions, Even when installing capacitors with different diameters, simply drop each capacitor 1 into the groove 21, and the circumferential surface of the capacitor 1 can be aligned along both widthwise edges of the groove 21 along the entire axial length. By abutting and supporting, it can be securely positioned and fixed.

Therefore, even if the capacitors 1 have different diameters, they can be reliably positioned and fixed in the groove 21 of the same width without wobbling or misalignment.

In addition, the flexibility of the groove 21 itself is extremely high, and the groove 21 can have the same width without worrying about the difference in diameter of the container 1 to be attached, so the shape of the groove 21 can be easily changed. .

As described above, the capacitor mounting structure of the present invention has the advantage of reducing the space required for mounting the capacitors and providing excellent workability, and the greater the number of capacitors that can be mounted at the same time, the greater the effect can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view for explaining the mounting state of a conventional capacitor. FIG. 2 is a sectional view showing an example of the capacitor mounting structure of the present invention. 1... Container, 2... Board, 3
······Fixture.

Claims (1)

[Scope of utility model registration request] A plurality of cylindrical capacitors are arranged substantially parallel on the substrate so that a part of their circumferential surfaces are in contact with the substrate, and are fixed to the substrate by coming into contact with the circumferential surface of the capacitors on the side opposite to the substrate. In the structure in which the capacitor is supported by a fixture and the board, a portion of the board where the capacitor is placed has a width smaller than the diameter of the capacitor and longer than the axial length of the capacitor. 1. A capacitor mounting structure characterized in that a notch-shaped groove is provided, the capacitor is dropped into the groove, and the circumferential surface of the capacitor is supported by abutting both widthwise edges of the groove.