JPS6322664Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to high frequency equipment such as tuners used in UHF and VHF, and particularly relates to a mounting structure for attaching a capacitor of a high frequency equipment to a printed circuit board.

Figures 1 and 2 show conventional capacitor mounting structures. Figure 1 shows a vertical cross-sectional view of a capacitor 3 inserted into the mounting hole 2 of a printed circuit board 1, and Figure 2 shows a rectangular mounting hole. 2 shows a plan view in which the capacitor 3 is inserted. The upper part of the capacitor 3 is formed into a rectangular shape as shown in FIGS. 1 and 2, and the lower part has a tapered side surface notched to form tapered inclined surfaces 3a and 3b.

On the other hand, a rectangular mounting hole 2 is bored in the printed circuit board 1 as shown in FIG. Then, the inclined surfaces 3a and 3b of the capacitor 3 and the edge portion 1 of the printed circuit board 1
a and 1b, and press the capacitor 3 into the printed circuit board 1 as shown by arrow A in FIG. was.

However, in the conventional mounting structure as shown in FIGS. 1 and 2, the inclined surfaces 3a, 3b and the edge portions 1a, 1b are attached by a strong fit.
If the capacitor 3 is strongly pushed into the mounting hole 2 of the printed circuit board 1, the capacitor 3 will crack.

For this purpose, connect capacitor 3 to printed circuit board 1.
If you try to attach it by just fitting it into the
The engagement with the inclined surfaces 3a and 3b became unstable, and the condenser 3 sometimes came off from the mounting opening 2.

In particular, when the capacitor 3 was inserted through the dip surface of the printed circuit board 1, there was a drawback that the capacitor 3 would fall off before dip soldering.

The present invention attempts to eliminate such conventional drawbacks, and its purpose is to provide a mounting structure that can reliably mount a capacitor to a mounting hole of a printed circuit board.

In order to achieve the above-mentioned object, the present invention forms legs on the shield plate near the mounting opening, and uses the elasticity of the legs to sandwich the capacitor between the mounting opening and the legs. It is.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 6.

Figure 3 is an overall configuration diagram of the tuner, which includes the tuner frames 4a, 4b, tuner cover 5a,
A box-shaped tuner main body frame 6 is formed by 5b, and a printed circuit board 1 is disposed horizontally within this tuner main body frame 6, and is partitioned by a shield plate 7 in the vertical direction.

In the vicinity where the printed circuit board 1 and the shield plate 7 intersect, there are provided a mounting hole 2 formed in the printed circuit board 1 and a leg part 8 in which the lower part of the shield plate 7 is elastically bent. .

Therefore, the mounting structure of the present invention is such that the capacitor 3
is held in place by the elastic force of the mounting port 2 and the legs 8.

Below, we will discuss the mounting structure of condenser 3 in the fourth section.
This will be explained using FIGS.

Figures 4 to 6 are detailed enlarged views of the mounting structure of the capacitor 3, with Figure 4 being a vertical cross-sectional view corresponding to the conventional Figure 1, Figure 5 being a plan view, and Figure 6 being the same as Figure 4. FIG.

First, the shape of the mounting hole 2 formed in the printed circuit board 1 will be explained using FIG. 5.

As shown in Fig. 5, the mounting port 2 of the present invention has sides DE,
Straight edge 9a of EF, FG, HJ and sides DJ, GH
The mounting opening 2 is of an unusual shape and has an inner convex curved edge 9b, and is not a rectangular mounting opening 2 as shown in FIG.

Therefore, the contact between the sloped surfaces 3a and 3b of the capacitor 3 and the mounting port 2 is between the corners of the sloped surfaces 3a and 3b and the curved edge 9 of the mounting port 2, as shown in FIG.
Point contact is made at points K and L of b, and the capacitor 3 is held from the surface by this point contact.

On the other hand, a leg part 8 is formed at the lower part of the shield plate 7 as shown in FIG. 4, and this leg part 8 is provided with a protruding part 10 as shown in FIG. serves as an elastic body, and the protrusion 10 makes the elastic force of the leg 8 stronger.

Therefore, as shown in Figures 4, 5 and 6, the elastic force of the leg 8 presses the capacitor 3 in the mounting port 2 from its back side toward the curved edge 9b of the mounting port 2, and the capacitor is held in place by being clamped between the mounting port 2.

According to this embodiment, since the capacitor 3 is held between the curved edge 9b of the mounting opening 2 and the elastic force of the leg portion 8 of the shield plate 7, the capacitor 3 can be firmly held.

Further, the further the condenser 3 is pushed into the mounting opening 2, the more the leg portion 8 in FIG. 6 is bent to the right in the figure, and the reaction force thereof is added, so that the holding force of the condenser 3 becomes stronger.

In addition, since the mounting opening 2 is provided with a curved edge 9b and widened at the end, even if there is a difference in the outer diameter of the capacitor 3 due to manufacturing errors, this curved edge 9b and the leg 8 The error can be absorbed by the combination of elasticity.

7 to 9 show other embodiments of the embodiments shown in FIGS. 4 to 6. FIG. 8 is a longitudinal sectional view of FIG. 7, and FIG. 9 is a plan view of FIG. 8.

Note that the only difference from those shown in FIGS. 4 to 6 is the shape of the leg portion 8 and the attachment opening 2.

In other words, the legs 8 were located at the bottom of the shield plate 7 in the ones shown in Figures 4 and 6, whereas in the ones shown in Figures 7 and 8, the bottom material of the shield plate 7 was bent. It was manufactured.

Note that the other explanations are the same as those in FIGS. 4 to 6.

This invention allows the capacitor to be firmly held by sandwiching it between the mounting opening and the legs of the shield plate, and even when the capacitor is inserted through the dip surface of the printed circuit board.
No more capacitors falling off before dip soldering.

[Brief explanation of the drawing]

Fig. 1 and Fig. 2 are diagrams showing the conventional mounting structure, Fig. 1 is a longitudinal sectional view, Fig. 2 is a plan view of Fig. 1, and Fig. 3 to Fig. 9 are examples of the present invention. Fig. 3 is an overall configuration diagram of the tuner, Fig. 4 is a vertical sectional view showing how the capacitor is installed, Fig. 5 is a plan view, and Fig. 6 is a sectional view taken along the line B-B in Fig. 4. , FIG. 7 is a perspective view showing another mounting state of the capacitor, FIG. 8 is a longitudinal sectional view showing the mounting state of FIG. 7, and FIG. 9 is a plan view of FIG. 8. 1...Printed circuit board, 2...Mounting port, 3...Capacitor, 7...Shield plate, 8...Legs, 9
b... Slanted edge, 9C... Curved edge, 10...
...protrusion.

Claims (1)

[Scope of utility model registration request] A leg that includes a printed circuit board, a capacitor attached to the printed circuit board, a shield plate placed on the printed circuit board, and a mounting hole for inserting the lower part of the capacitor into the printed circuit board, and elastically presses the capacitor to the lower part of the shield plate. A high-frequency device characterized in that the capacitor is elastically held between the legs and the edge of the mounting opening.