JPH077192U - Electronic device shield case - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a shield case for an electronic device in which a locking piece can be surely bent from a predetermined position and which does not require special processing such as a V notch. In a shield case of an electronic device including a shield case body 1 in which a printed circuit board 5 on which electronic parts and the like are preliminarily mounted is incorporated, the printed circuit board 5 is bent after being housed to bend the printed circuit board 5 to the shield case body 1 A shield case for an electronic device in which a locking piece 2 to be fixed to and a punching hole 3 for bending are formed at a position where the locking piece 2 is bent.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a shield case for electronic equipment such as a TV tuner with a modulator.

[0002]

[Prior art]

 As is well known, in a TV tuner with a modulator, a printed circuit board on which various electronic components and electronic elements are pre-assembled is incorporated into a conductive shield case to protect internal electronic components from external electric fields and external magnetic fields. However, the main body of this shield case is such that a conductive metal plate such as a steel plate is pressed into a box shape, and then the surface of the shield case main body is coated with a solder coating layer using the solder dipping method.

2A and 2B are enlarged views of a main part of a conventional shield case main body. Although a printed circuit board 12 is incorporated in the shield case main body 11 that is press-molded, the same printed circuit board 12 is used. Is fixed to the inside of the shield case main body 11 by bending the locking piece 13 punched on the side wall of the shield case main body 11, and the ground pattern of the printed circuit board 12 and the locking piece 13 are soldered later. The entire shield case is shielded.

[0004]

[Problems to be solved by the device]

 However, in the shield case body 11 having the above-described conventional structure, the V notch 14 is provided on the bending side of the locking piece 13 so that the locking piece 13 for fixing the printed circuit board 12 can be bent at an accurate position. Although the locking piece 13 is easily bent, there is a problem that the V notch 14 is filled with solder because the solder dip is performed after the shield case body 11 is molded, and 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 the V notch 14 is formed by a cutting process other than these forming processes, so that the number of working steps increases and the cost increases. There was a problem such as.

An object of the present invention is to solve the above-mentioned problems of the conventional structure, by which the locking piece can be surely bent from a predetermined position and which does not require special processing such as V notch. To get the shield case.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a shield case for an electronic device including a shield case body in which a printed board on which electronic components and the like are preliminarily mounted is built, and printed by bending after housing the printed circuit board. We propose a shield case for electronic equipment that has a locking piece that fixes the board to the shield case body and a punching hole for bending at the position where the locking piece is bent.

[0007]

[Action]

 According to the shield case of the electronic device thus formed, the punching hole for bending is provided in the bending portion of the locking piece for fixing the printed circuit board, so that even if the shield case is formed and solder dipping is performed. The punching hole is not filled with solder, the bending position of the locking piece is accurate, and the punching hole is punched at the same time as the locking piece, so no special process is required.

[0008]

【Example】

 Hereinafter, details of the embodiment of the present invention will be described with reference to FIG.

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

That is, in forming the shield case main body 1, the locking piece 2 for fixing the printed circuit board is punched and formed on the side wall of the shield case main body 1, but at the base of the locking piece 2, that is, at the bending position. The punching hole 3 for bending is punched at the same time as 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 of the shield case body 1 is covered with a solder coating layer to assemble with the printed circuit board 5. However, since the bending punched holes 3 have a certain area, the bending punched holes 3 will not be filled with solder even if soldering is performed. Therefore, if the locking piece 2 and the punching hole 3 for bending are simultaneously formed in this way, a special working process for the punching hole 3 for bending is not required, so that the shield case body 1 is machined. The number of steps can be reduced and the manufacturing cost can be reduced.

When the printed circuit board 5 is incorporated in the shield case body 1, when the printed circuit board 5 is positioned in the shield case body 1 and the locking piece 2 is bent in the direction of arrow A, the locking piece 2 Since the base has a lower bending rigidity due to the formation of the punching hole 3 for bending, the locking piece 2 can be reliably bent from the position of the punching hole 3 for bending. After fixing the printed circuit board 5 by bending the locking piece 2, the ground pattern of the printed circuit board 5 and the locking piece 2 are soldered, and the ground pattern is electrically connected to the shield case body 1. Become.

In the above-mentioned embodiment, the example of the bending punching hole 3 consisting of one circular hole is given, but the bending punching hole 3 is an elliptical hole or a hole of another shape. Well, the number is free.

[0014]

[Effect of device]

 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 and the punching hole for bending can be formed at the same time when the shield case body is pressed, so The manufacturing cost can be reduced by reducing the number, and since the punching hole for bending is not filled with solder when dipping the solder, the locking piece can be bent accurately. Further, according to the present invention, when soldering the locking piece and the printed board, the punching hole for bending suppresses heat conduction from the locking piece to the entire shield case body, so that the solder connection is reliable. Also has the effect of improving.

[Brief description of drawings]

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

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

[Explanation of symbols]

 1 Shield case body 2 Locking piece 3 Bending punch hole 5 Printed circuit board

Claims (1)

[Scope of utility model registration request] 1. In a shield case of an electronic device, which comprises a box-shaped shield case main body in which a printed circuit board on which electronic parts and the like are preliminarily mounted is built, the printed circuit board is bent after being housed to bend the printed circuit board to the shield case main body. A shield case for an electronic device, characterized in that a locking piece to be fixed to and a punching hole for bending are formed at a position where the locking piece is bent.