JPH0334928Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for fixing electrical components onto a printed circuit board, and particularly to a fixing device suitable for relatively large and tall electrical components.

Conventional Technology Conventionally, when a relatively large electrical component such as an electrolytic capacitor is mounted on a printed circuit board, it is common to attach adhesive such as bond to the bottom of the electrolytic capacitor and fix it to the printed circuit board. Ta.

Problems that the invention aims to solve However, with this fixing method, the electrolytic capacitor is relatively large, so the mounting space on the printed circuit board and the space in the height direction are large. There was a risk that the soldered portion of the lead wire would peel off the pattern on the pattern surface on the back side of the printed circuit board because it was easily hit by the operator's hands or jigs.

In order to prevent this pattern from peeling off, a method has been adopted in which the electrolytic capacitor is turned sideways to lower its height and then fixed to the printed circuit board by applying adhesive to the portion facing the printed circuit board. However, in that case, the mounting space on the printed circuit board becomes even larger.

This invention solves these conventional problems and
When mounting relatively large electrical components on a printed circuit board, the purpose is to increase the stability, reduce the space in the height direction, and increase the mounting density.

Means for Solving the Problems Therefore, in the present invention, in a device for fixing electrical components onto a printed circuit board, a holder for placing and holding the electrical component in an inverted state, and a single straight line for the holder are provided. A supporting part is provided on the printed circuit board and has a width smaller than the width of the holder, and a groove is formed on the bottom surface of the supporting part to correspond to a component mounted on a location facing the supporting part on the printed circuit board. The present invention is characterized by an electrical component fixing device in which the supporting portion is fixed onto a printed circuit board.

Function Since the electrical component is fixed by the holder near the top of other electrical components via the support section, only the support section is directly mounted on the printed circuit board, and the support section is not placed between the other electrical components. The mounting space can be significantly reduced. Furthermore, since the electrical components are fixed horizontally, the height of vertically elongated electrical components is reduced, space in the height direction can be reduced, and the risk of pattern peeling, which is likely to occur during work, is also reduced.

Embodiments of the invention Hereinafter, embodiments of the invention will be described using the drawings. FIG. 1 is a diagram showing an electrical component fixing device according to the present invention, in which a is a perspective view and b is a sectional view taken along the line A-A' in FIG. 1a. The electrical component fixing device 1 includes a holder 2 having a hollow portion for holding an electrolytic capacitor 4, and a support portion 3 for supporting the holder 2 on a printed circuit board. The inner diameter of the holder 2 is approximately equal to the outer diameter of the electrolytic capacitor 4, and the electrolytic capacitor 4 is inserted and fixed into the hollow part. The support portion 3 is formed in a long and narrow shape on a single straight line along the lower part of the holder 2, and its width is set to be shorter than the outer diameter of the electrolytic capacitor 4. As the material of the fixing device 1, for example, rubber (neoprene rubber, urethane rubber, etc.) or ABS resin can be used, and rubber is particularly preferred because of its excellent vibration resistance.

FIG. 2 shows a perspective view of an electrolytic capacitor fixed to a printed circuit board using this fixing device.
The electrolytic capacitor 4 is inserted and held in the hollow part of the holder 2 in a sideways state, and its lead wire 6 is soldered to the back surface of the printed circuit board 5. If the electrolytic capacitor 4 is to be held more firmly in the holder 2, the two may be fixed with adhesive. The support part 3 is fixed to the printed circuit board 5 with an adhesive, and the electrolytic capacitor 4 is firmly fixed on the printed circuit board 5. Note that the support part 3 is set at a height that allows the electrolytic capacitor 4 to be fixed near the top of other electrical components 7 and 8, so that other electrical components can be mounted up to the vicinity of the support part 3. It is possible to increase the packaging density. In this embodiment, the fixing device 1 and the printed circuit board were fixed using adhesive.
In some cases, it is also possible to screw in from the back side of the printed circuit board, and by doing so, the electrolytic capacitor can be fixed more firmly.

As described above, in this embodiment, the mounting space occupied by the electrolytic capacitor on the printed circuit board is only the mounting space for the elongated support section 3, so that it can be inserted between other electrical components, and the mounting density is improved. Furthermore, since the electrolytic capacitor can be firmly fixed in a horizontal position, space in the height direction can be reduced, and the reliability of fixing the electrolytic capacitor can be increased.

FIG. 3 is a perspective view showing another embodiment of the electrical component fixing device, in which 11 is a holder and 12 is a support section. In this example, the electrolytic capacitor is in holder 1
1 using adhesive. Although the support part 12 is divided into two parts, it may be a series of parts as shown in FIG. This embodiment has a simpler structure than the fixing device shown in FIG. 1, resulting in lower costs.
Fixing the electrolytic capacitor becomes easier.

In the above embodiment, the support part of the electrical component fixing device was fixed using the open space on the surface of the printed circuit board, but in the current situation where higher density mounting is required, even the bonding area of the support part cannot be secured. There are many cases.

FIG. 4 is a perspective view showing an embodiment that solves such a problem. A case will be described in which jumper wires 26 and 27 are already mounted on the printed circuit board 25, and the support portion 23 of the fixing device 21 is fixed to these locations. In the figure, the part surrounded by the broken line is the place where the support part 23 is mounted. Grooves 28 and 29 corresponding to the jumper wires 26 and 27, respectively, are provided on the bottom surface 30 of the support portion 23, that is, the joint surface with the printed circuit board 25.
is formed. Therefore, the jumper wires 26 and 27 can be avoided by the grooves 28 and 29. Then apply the adhesive to the grooves 28 and 2 on the bottom surface 30.
It is applied to the area except 9 and fixed to the printed circuit board 25. Therefore, even in a place where wires such as jumper wires are mounted, the fixing device and, by extension, the electrolytic capacitor can be fixed while avoiding such wires and without reducing adhesive strength too much.

It should be noted that this embodiment is not limited to mounting on jumper wires, but can also be applied to mounting on small components such as horizontal resistors and diodes.

In the above embodiments, the case of fixing an electrolytic capacitor was described, but the present invention can also be applied to other relatively large electrical components.

Effects of the invention As explained in detail above, according to the invention, relatively large electrical components such as electrolytic capacitors are fixed near the top of other electrical components, and the mounting space on the printed circuit board is used to secure the electrical components. Since only the bottom surface of the support part of the device is required, and the support part can be inserted between other electrical components, the packaging density is greatly improved. In addition, since the electric component can be firmly fixed to the printed circuit board in a collapsed state, the height is lowered, the space in the height direction is reduced, and a stable fixed state can be obtained. Furthermore, since the structure of the fixing device is very compact, it can be realized at low cost.

Furthermore, when fixing the fixing device on another component, since a groove corresponding to the other component is provided on the bottom surface of the support portion, the mounting density can be further increased.

[Brief explanation of the drawing]

1 and 2 are views showing one embodiment of the present invention, FIG. 3 is a view showing another embodiment of the present invention, and FIG. 4 is a view showing another embodiment of the present invention.
The figure shows still another embodiment of the present invention. In the figure, 1 and 21 are electrical component fixing devices;
is a holder; 3, 12, and 23 are supporting parts; 4 is an electric part; and 5, 25 are printed circuit boards.

Claims (1)

[Scope of utility model registration request] A device for fixing an electrical component onto a printed circuit board, including a holder for placing and holding the electrical component in an inverted state, and a holder that is provided on a single straight line with respect to the holder and has a width smaller than the width of the holder. A groove is formed on the bottom surface of the support part to correspond to a component mounted on the printed circuit board at a location opposite to the support part, and the support part is fixed onto the printed circuit board. An electrical component fixing device characterized by: