JPH06338695A - Shield case - Google Patents

Abstract

PURPOSE:To readily exchange and repair a part by providing one round of cuts with a plurality of connection parts therein to at least one side of a shield case which is attached to a specified position on a circuit substrate and shields the specified position from an outside magnetically. CONSTITUTION:A round of cuts 13 is formed maintaining a specified distance from a rectangular outer periphery forming an upper surface 11 of a shield case 1. A connection part 14 is arranged in the cuts 13 at regular intervals. The shield case 1 is attached on a substrate 18 and covers all over an electronic part 17 which requires shielding. When the electronic part 17 is repaired and exchanged, all the connection parts 14 in the cuts 13 in three sides are cut by using a nipper, etc. An opened upper lid inner peripheral part 11B is raised by using the connection part 14 in a remaining one side as an axis and an opening part is formed. After the electronic part is repaired and exchanged, the upper lid inner peripheral part 11B is closed and the cut connection part 14 is soldered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield case suitable for application to, for example, a shield case attached to a circuit board of a television receiver.

[0002]

2. Description of the Related Art A shield case is a group of integrated electronic components, etc., mounted on a substrate to form a circuit that operates and operates according to the purpose, and a group of other electronic components and radio waves generated from the circuit. While protecting its own circuit characteristics from magnetic fields,
It serves to prevent harmful waves and magnetic fields emitted from its own circuit from affecting the surrounding circuits, and for example, the side and top surfaces of the constituent circuits are covered with metal plates such as aluminum.

Generally, as shown in FIG. 5, it is composed of a shield case 20 composed of two kinds of parts, a main body 21 and an upper lid 22. Shield case 20 consisting of these two parts
After inserting the electronic component 17 into a predetermined position on the board 18, the leg portion 21A is inserted into the case insertion hole 18A on the board 18 to fix the main body 21 on the board 18. Then, the main body 21 is covered with an upper lid 22 having a recess fitting receiving portion 24 inside the side surface corresponding to the protruding fitting portion 23 on the side surface of the main body 21.

With this configuration, the electronic component 17
The upper lid 22 can be easily removed when replacing or repairing.

[0005]

However, the above-mentioned conventional shield case requires two parts, the main body 21 and the upper lid 22, so that the shield case 2 is disadvantageously expensive to manufacture.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a shield case having a simple structure that allows easy replacement and repair of parts.

[0007]

The present invention is mounted on a circuit board 18 at a predetermined position as shown in FIG.
In the shield case that magnetically shields the predetermined portion from the outside, at least one surface 11 is provided with a notch 13 that makes a round with a plurality of connecting portions 14 in the middle.

Further, in this case, the notch 13 has a substantially quadrangular shape, and the connecting portions 14 are provided at substantially opposite positions on the two opposing sides forming the quadrangular shape.

[0009]

According to the shield case having the above-described structure, when the circuit parts inside the shield case are exchanged or repaired, the connection portion of the cut is cut off, and the opening is provided along the cut that makes one round. Therefore, the inside can be replaced or repaired through this opening.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the shield case of the present invention will be described below with reference to FIGS. 1 to 3
In FIG. 5, the portions corresponding to those of FIG. 5 described as the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, reference numeral 1 denotes a shield case, which has a rectangular upper surface 11 corresponding to the size of a portion to be shielded on a substrate 18 of an electronic component 17 group forming a circuit, and 90 from the outer periphery of the upper surface 11. It is bent inward and is provided with side surfaces 12 having a height corresponding to the height of the electronic component 17 group, and convex leg portions 15 at the tips of the side surfaces 12.

From the outer periphery of the rectangle forming the upper surface 11,
Notch 13 with a width of about 2 mm, keeping a certain predetermined distance
To make one round. The notch 13 has connecting portions 14 arranged at appropriate intervals along the way. Such a notch 13
The upper surface 11 is divided into an inner peripheral portion 11B of the upper lid and a peripheral portion 11A of the upper surface.

The shield case 1 is made of a single material plate having a shielding effect, such as an aluminum plate. It is performed by the used press processing.

The shield case 1 thus constructed is mounted on the substrate 18. That is, as shown in a cross section in FIG. 2, after the electronic components 17 are mounted on the board 18 at predetermined positions, the case insertion holes 18A on the board,
The leg 15 provided at the tip of the side surface 12 is inserted to surely cover the entire electronic component 17 that needs to be shielded. After that, the tip of the leg portion 15 is soldered with the solder 19 by passing it through a dip tank (not shown). By mounting the shield case 1 in this manner, the shield effect can be sufficiently exerted.

Next, a description will be given of a case where a problem occurs in the electronic component 17 inside the shield case 1 thus mounted, and the electronic component 17 is repaired or replaced.

First, FIG. 3A shows a state in which a group of electronic components 17 arranged on a substrate 18 is covered with a shield case 1 having an upper surface 11 and a side surface 12. In this state, as shown in FIG. 3B, all the connecting portions 14 of the notches 13 on the three sides are cut using a nipper or the like.

Next, as shown in FIG. 3C, the opened inner peripheral portion 11B of the upper lid is raised by using the remaining connecting portion 14 on one side as an axis to form an opening. By doing so, the group of electronic components 17 can be checked through the opening.

After repairing and replacing, the inner peripheral portion 11B of the upper lid is closed, and the cut connection portion is soldered.
By doing so, the state becomes as shown in FIG. 3D, and the state is functionally returned to the original state of FIG. 3A.

As described above, according to the shield case 1 of the present embodiment, electronic components on the substrate can be shielded as in the conventional case, and for example, by mounting the electronic component on the substrate of the image receiving circuit of the television receiver, electromagnetic waves from peripheral components are emitted. The effect of can be removed. In this case, since the shield case 1 is integrally molded, it can be manufactured easily and at low cost. Then, by disconnecting the connecting portion 14 provided in the notch 13 of the upper surface 11, the internal circuit parts can be easily repaired or replaced, and after the repair or replacement, the original state is obtained by soldering. Can be easily returned to.

The position of the connecting portion 14 is not limited to the above embodiment. For example, as shown in FIG.
4 only on two opposite sides of the notch 13 that makes a circle
It is also possible to provide the connection portions 14 for each location and arrange the four connection portions 14 on the two sides at positions facing each other. By doing so, since the number of the connecting portions 14 is small, the inside can be opened more easily. The notch and the connecting portion may be provided in another arrangement.

[0021]

According to the shield case of the present invention, the circuit parts inside the shield case can be easily replaced and repaired even though they are integrally molded and are simple.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an embodiment of a shield case according to the present invention.

FIG. 2 is a cross-sectional view showing a mounted state of an embodiment of a shield case according to the present invention.

FIG. 3 is a perspective view for explaining opening and closing of an upper lid portion of an embodiment of the shield case of the present invention.

FIG. 4 is a perspective view showing the configuration of another embodiment of the shield case of the present invention.

FIG. 5 is a perspective view showing an example of a conventional shield case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield case 11 Upper surface 11A Upper surface peripheral portion 11B Upper lid inner peripheral portion 12 Side surface 13 Notch 14 Connection portion 16A Leg portion

Claims (2)

[Claims] 1. Attached to a predetermined location on a circuit board,
A shield case for magnetically shielding the predetermined portion from the outside, characterized in that at least one surface is provided with a notch that makes a round with a plurality of connecting portions in the middle. 2. The shield case according to claim 1, wherein the notch has a substantially quadrangular shape, and the connecting portions are provided at substantially opposite positions on two opposing sides forming the quadrangular shape.