JP2584954Y2 - Electronic equipment shield case - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield case for electronic equipment such as a TV tuner with a modulator.

[0002]

2. Description of the Related Art As is well known, in a TV tuner with a modulator, a printed circuit board in which various electronic components and electronic elements are pre-installed is incorporated in a conductive shield case, and internal electronic components and the like are exposed to an external electric field or an external electric field. To protect against magnetic fields, the body of this shield case is formed by pressing a conductive metal plate such as a steel plate into a box shape, and then the surface of the shield case body is coated with a solder coating layer using a solder dip method. become.

FIGS. 2A and 2B are enlarged views of a main part of a conventional shield case main body. A printed board 12 is incorporated in a press-formed shield case main body 11, but the printed board 12 is shielded. Case body 11
The locking piece 13 punched into the side wall of the printed circuit board is bent and fixed inside the shield case body 11, the ground pattern of the printed circuit board 12 and the locking piece 13 are later soldered, and the entire shield case is shielded. Is done.

[0004]

However, in the shield case body 11 having the above-mentioned conventional structure, the printed circuit board 1 is not provided.
A V-notch 14 is provided on the bent side of the locking piece 13 so that the locking piece 13 for fixing the locking piece 2 can be bent at an accurate position, so that the locking piece 13 is easily bent. Since the solder dip is performed after the molding, the V notch 14 is filled with solder, and there is a problem that the function itself of the V notch 14 is impaired. Further, the shield case main body 11 is completed by punching and bending by press working, but since the V notch 14 is formed by a cutting step different from these forming steps, the number of processing steps increases and the cost increases. And so on.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the conventional structure, in which a locking piece can be reliably bent from a predetermined position and a shield for electronic equipment which does not require special processing such as a V notch. There is a case to get.

[0006]

In order to achieve the above object, the present invention provides a shield case of an electronic device having a box-shaped shield case main body in which a printed circuit board on which electronic components and the like are mounted in advance is provided. Shield case body
Previously been solder dipping, the printed circuit board by bending after accommodating the printed circuit board Handade is
To secure the Ippu the shield case body, the engaging piece is formed in the shield case body, and during the solder dipping in a position bending of said locking piece, Ha
A punching hole for bending having a size not to be filled with a solder coating is formed.
The present invention proposes a shield case of an electronic device to which a seal is attached .

[0007]

According to the shield case for an electronic device formed as described above, since a punching hole for bending is provided in the bent portion of the locking piece for fixing the printed circuit board, a solder dip is formed after the shield case is formed. However, since the punched hole is not filled with solder, the bent position of the locking piece is accurate, and the punched hole is punched and formed at the same time as the locking piece, so that no special process is required.

[0008]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIGS. 1A and 1B are a cross-sectional view and a side view of a main part showing a shield case according to the present invention. In the figure, reference numeral 1 denotes a shield case main body, and this shield case main body 1 is manufactured by punching and bending from a conductive metal plate such as a steel plate as in the related art.

That is, when the shield case main body 1 is formed, a locking piece 2 for fixing the printed circuit board is stamped and formed on the side wall of the shield case main body 1. The punching hole 3 for bending is simultaneously punched with the locking piece 2.

Since the shield case according to the illustrated embodiment has the above-described structure, the assembled shield case body 1 is solder-dipped and the surface is coated with a solder coating layer. However, since the punching hole 3 for bending has a certain area, the punching hole 3 for bending will not be filled with solder even if it is soldered. Therefore, if the locking piece 2 and the punching hole 3 for bending are formed at the same time in this manner, a special processing step for the punching hole 3 for bending is not required. The number can be reduced, and the manufacturing cost can be reduced.

When the printed circuit board 5 is incorporated in the shield case main body 1, after the printed circuit board 5 is positioned in the shield case main body 1, the locking piece 2 is bent in the direction of arrow A, and the base of the locking piece 2 is bent. Since the bending rigidity is reduced due to the formation of the punching hole 3 for bending, the locking piece 2 is reliably bent from the position of the punching hole 3 for bending. After the fixing of the printed board 5 by bending the locking piece 2, the ground pattern of the printed board 5 and the locking piece 2 are soldered,
The ground pattern is electrically conducted to the shield case main body 1.

In the above embodiment, the example of the punched hole 3 for bending made of one circular hole has been described, but the punched hole 3 for bending is an oval hole or a hole of another shape. And the number is also free.

[0014]

As described in detail above, in the shield case of the electronic device according to the present invention, the locking piece for fixing the printed circuit board when the shield case body is pressed,
Since the punching hole for bending can be formed at the same time, the manufacturing cost can be reduced by reducing the number of processing steps, and since the punching hole for bending does not fill with solder at the time of solder dip, the locking piece can be bent accurately. it can. Also, according to the present invention, when soldering the locking piece and the printed circuit board, heat conduction from the locking piece to the entire shield case body is suppressed by the punching holes for bending, so that the reliability of the solder connection is also improved. It has the effect of improving.

[Brief description of the drawings]

FIGS. 1A and 1B are a sectional view and a side view of a main part of a shield case main body according to the present invention.

FIGS. 2A and 2B are a sectional view and a side view of a main part of a conventional shield case main body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield case main body 2 Locking piece 3 Punching hole for bending 5 Printed circuit board

Claims (1)

(57) [Scope of request for utility model registration] 1. A shield case of the electronic device with an electro-box-like shield case body which components such as a built-in pre-mounted with a printed circuit board, said shield case body
In advance solder dipping, the printed circuit board by bending after accommodating the printed circuit board Handadi
A locking piece is formed on the shield case body for fixing to the shield case body that has been tipped, and a soldering dip is provided at a position where the locking piece is bent.
Punching hole for bending with a size that does not fill the coating
Is formed, and the locking piece and the printed circuit board are soldered.
A shield case for electronic equipment characterized by being attached .