JPH07336083A - Shielding cover - Google Patents

Abstract

PURPOSE:To obtain a shielding cover whose shape is small and whose mounting operation is easy by a method wherein an edge part is bent, a coupling hole which can be coupled to a claw formed on the side to be mounted of the shielding cover is made in the edge part and a tongue piece which is tilted to the side of a board is formed near the coupling hole. CONSTITUTION:A shielding cover 3 is formed in such a way that a thin plate of a copper-alloy spring material is bent and stamped. The side edge part 6 of the thin plate is bent at right angles in a position which is a little wider than the width of a case frame 2, it is tilted additionally to the inside, and, lastly, it is bent so as to match the shape of the case frame 2 in such a way that the lower end becomes vertical. Then, a coupling hole 7 which is coupled to a claw 4 is made in the inclination part of the side edge part 6. In addition, a coupling hole 9 which is coupled to the claw 4 formed at the edge of the case frame 2 is made in an end edge part 8. Tongue pieces 10 are formed in positions which are adjacent to the coupling hole 7 and the coupling hole 9, and they are bent at required angles at base ends so as to be tilted to the side of a wiring board 1. Thanks to the springy force of the tongue pieces 10, it is possible to restrain them from shaking in the vertical direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield cover used for electrically shielding a wiring board of electronic equipment.

[0002]

2. Description of the Related Art In electronic equipment, circuits that malfunction due to external electrical noise are electrically shielded so that noise does not enter the circuitry.

The conventional electric shield has a structure in which a wiring board to be shielded is housed in a shield case and the shield case housing the wiring board is incorporated in a device.

[0004]

In recent years, electronic devices have become smaller and thinner, and the storage space for wiring boards and the like has become remarkably narrow. In the electric shield using the above-mentioned conventional shield case, the shape of the shield case is large with respect to the wiring board, and the wiring board is attached to the shield case by means of screwing and soldering, and workability is also improved. It was bad.

In view of the above situation, the present invention aims to provide a shield cover having a small shape and easy to attach.

[0006]

SUMMARY OF THE INVENTION The present invention is a shield cover provided on the non-component mounting surface side of a wiring board, in which an edge is bent and a claw formed on the edge of the shield cover on the mounted side. Is formed with an engaging hole which is engageable with the tongue, and a tongue inclined toward the substrate side is formed in the vicinity of the engaging hole.

[0007]

The shield cover is mounted by engaging the engaging hole at the edge with the claw on the mounted side, and the spring force of the tongue prevents the rattling between the engaging hole and the claw.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show a substrate unit equipped with a shield cover according to the present invention.

A wiring board 1 on which an electronic circuit is formed has a component mounting surface covered with a case frame 2 made of aluminum die casting. The case frame 2 also serves as a strength member of an electronic device, and irregularities corresponding to mounted components are formed, and a shield cover 3 described later is attached to a required side surface and a required end surface of the case frame 2. Claws 4 for forming are formed. A shield cover 3 is attached to the non-component mounting surface of the wiring board 1 with an insulating sheet 5 interposed.

The shield cover 3 will be described in detail with reference to FIGS.

The shield cover 3 is formed by bending and punching a thin plate of copper alloy spring material. The side edge portion 6 of the thin plate is bent at a position slightly wider than the width of the case frame 2 at a right angle, further tilted inward, and finally bent so that the lower end is vertical so as to fit the shape of the case frame 2.
The interval between the vertical lower ends facing each other is set to be slightly smaller than the width of the case frame 2. An engaging hole 7 that engages with the pawl 4 is formed in the inclined portion of the side edge portion 6. Further, at a position where the edge 8 of the thin plate slightly protrudes from the position of the end surface of the case frame 2, the edge 8 is bent at a right angle according to the shape of the case frame 2, and the edge 8 is attached to the end surface of the case frame 2. An engagement hole 9 that engages with the formed claw 4 is provided.

Escape holes, notches, etc. are appropriately formed on the surface of the shield cover 3 facing the wiring board 1, and a tongue piece 10 is formed at a position adjacent to the engaging holes 7 and 9. It The tongue piece 10 is bent at a required angle at the base end so as to incline toward the wiring board 1.

When the shield cover 3 is attached,
The wiring board 1 and the case frame 2 are superposed, and the shield cover 3 is attached to the case frame 2 with the insulating sheet 5 interposed on the non-component mounting surface of the wiring board 1.
Fit in. The engaging hole 7 and the engaging hole 9 formed in the side edge portion 6 and the end edge portion 8 are engaged with the claw 4 of the case frame 2, and the engaging hole 7, the engaging hole 9 and the claw are formed. The engagement state with 4 is guaranteed by the spring property of the shield cover 3 itself.

Further, in a state in which the engaging holes 7, 9 and the claw 4 are engaged with each other, the tongue piece 10 is in contact with the wiring board 1 via the insulating sheet 5 and is bent. Therefore, the spring force of the tongue piece 10 prevents the engagement hole 7, the engagement hole 9 and the claw 4 from rattling in the vertical direction with respect to the wiring board 1.

Since the shield cover 3 is easily attached without using screws or the like and is in close contact with the wiring board 1, the space required for mounting the shield cover 3 is extremely small. Good.

[0017]

As described above, according to the present invention, the wiring board is mounted so as to be in close contact with the wiring board, and the mounting is performed by screwing,
Since it can be easily installed without soldering, it occupies a small space and exhibits excellent workability.

[Brief description of drawings]

FIG. 1 is a perspective view showing a board unit to which an embodiment of the present invention is attached.

FIG. 2 is a cross-sectional view of the same board unit.

FIG. 3 is a bottom view of the shield cover according to the embodiment.

FIG. 4 is a side view of the shield cover.

FIG. 5 is a front view of the shield cover.

6 is a view on arrow A of FIG. 3. FIG.

[Explanation of symbols]

 1 Wiring Board 2 Case Frame 3 Shield Cover 4 Claw 5 Insulating Sheet 6 Side Edge 7 Engagement Hole 8 End Edge 9 Engagement Hole 10 Tongue Piece

Front page continuation (72) Inventor Takeshi Sato 3-14-20 Higashi-Nakano, Nakano-ku, Tokyo Kokusai Electric Inc. (72) Inventor Ryuichi Takahashi 3-14-20 Higashi-Nakano, Nakano-ku, Tokyo Kokusai Electric Co., Ltd.

Claims (1)

[Claims] 1. A shield cover provided on the non-component mounting surface side of a wiring board, wherein an edge portion is bent, and an engagement hole engageable with a claw formed on the side of the shield cover to be mounted on the edge portion. And a tongue that is inclined toward the substrate is formed in the vicinity of the engagement hole.