JPS626771Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in the cover fitting structure of a high frequency unit such as an RF modulator.

In a conventional RF modulator or the like, a terminal protrusion 5 for attaching a connector to a printed circuit board 4 protrudes from an opening 16 provided in a frame 3, as shown in FIG. 1A.

A part of the claw of the cover 1 is configured to come into elastic contact with the outer wall of the frame 3 at the upper part of the opening 16.
However, as shown in FIG.
There was a problem where the robot came into contact with the robot and shot himself. In order to solve this problem, it has been considered to simply shorten the length of the tabs on the cover 1, but as high-frequency units become smaller and thinner, the height of the upper frame of the opening 16 increases. Since the resistance is low, the strength of the elastic fitting cannot be secured sufficiently, and the effect of preventing unnecessary radiation is insufficient.

The present invention was developed to eliminate these conventional drawbacks, and has been designed to prevent the tabs of the cover from coming into contact with the printed circuit board, and to ensure a sufficiently strong fit even when the cover is made smaller and thinner. The details will be explained below with reference to an embodiment shown in FIGS. 2A and 2B.

Figure 2 A and B are so-called embodiments of the present invention.
These are a developed view and a sectional view showing the cover and frame structure of the RF modulator. In the figures, 14 is a frame of the RF modulator, and the frame 14 is provided with an opening 16 for passing the terminal protrusion 5 of the printed circuit board 4. . The frame 14 is located above the opening 16 of the frame 14.
A bent part 15 which is bent in a step-like manner is provided inside. Further, 10 is a cover, and the tip 13 of the claw that fits into the side surface of the frame 14 where the opening 16 of the cover 10 is located is bent so as to fit inside the frame 14 (however, there is no folded part 2 as in the conventional case). ). Note that the claw 11 that fits into the side surface of the frame 14 without the opening 16 has a folded portion 2 as in the conventional case.

When the cover 10 is attached to the frame 14 as shown in FIG.

As mentioned above, since the tip 13 of the tab of the cover 10 is simply bent inward and the folded portion is removed from the tip 13 of the tab that fits into the bent portion 15 above the opening 16, the terminal protrusion of the printed circuit board 4 is eliminated. Part 5
The folded part will not come into contact with the wiring pattern and will not shoot. Further, since the side surface of the frame 14 with the opening 16 has the same number of fitting points as the other surfaces, and the claws are sufficiently long, sufficient strength of the fitting can be obtained.

Furthermore, as shown in FIG. 3, since the opposing portion 17 between the wiring pattern 6 of the printed circuit board 5 and the tip of the bent portion 15 of the frame 14 is located inside the surface of the frame 14, Radiation caused by the electric field is transmitted through the bent portion 15 up to the surface of the frame 14.
It is effective in preventing unnecessary beam radiation. In addition,
Since the stepped bent portion 15 is provided in the frame 14, the frame strength of the upper frame of the opening 16 is also reinforced.

As described above, according to the present invention, in a high frequency unit that has an opening in the side surface of the frame for passing the terminal protrusion for attaching a connector on a printed circuit board, the upper part of the opening is bent inside the frame. By providing a folded portion and fitting the tab tip of the cover into elastic contact with the outer wall of the bent portion, contact between the tip of the tab and the wiring pattern is eliminated, and the strength of the fitting is also achieved. , its practical effects are great. Further, effects such as prevention of unnecessary radiation and reinforcement of frame strength can be expected.

[Brief explanation of the drawing]

Figure 1 A and B relate to the conventional example, Figure A is a perspective view, Figure B is a sectional view, and Figure 2 A and B are the parts of the present invention.
Regarding the embodiment, Figure A is a developed view, Figure B is a cross-sectional view, and Figure 3 is a cross-sectional view of a main part related to Figure 2. 1, 10...Cover, 2...Folding part, 11
...Claw, 13...Claw tip, 3,14...
Frame, 15...Bending portion, 16...Opening portion, 4...
...Printed circuit board, 5...Terminal protrusion, 6...Wiring pattern, 17...Opposing part.

Claims (1)

[Scope of utility model registration request] In a high frequency unit that has an opening in the side surface of the frame for passing the terminal protrusion for attaching a connector on a printed circuit board, a bent part is provided above the opening to be bent inside the frame, and a bent part is provided on the outer wall of the bent part. A cover fitting structure for a high frequency unit, characterized in that the cover is fitted by making elastic contact with the tips of the claws of the cover.