JPS62200799A - Apparatus for attaching shielding plate to electronic equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applied to a semiconductor element mounting board (hereinafter abbreviated as a board) used in, for example, a personal computer as an electronic device. This invention relates to a shield plate mounting device for preventing noise interference.

[Prior Art] Fig. 3 is a plan view of an electronic device to which a conventional shield plate removal device is applied, and Figs. 4 and 5 are front views thereof. 2) is the board on which these are mounted, (3) is the shield plate to prevent noise interference, (4) is the housing, (6) is the boss formed integrally with the housing (4), and (7) is the boss. (6) and screw it into the above board (
2) A screw for fixing the shield plate (3) to the housing (4), and (8) an insulating rubber block interposed between the substrate (2) and the shield plate (3).

Next, the operation will be explained. As shown in Figure 4, place the shield plate (3) on the boss (6) that is integrated with the housing (4), place the board (2) on top of it, and screw the plurality of screws (7) onto the boss (6). ) to secure it. At this time, as shown by the dashed line in FIG. 4, the central part of the shield plate (3) decreases by one dimension along the substrate side, and there is a risk that it may come into contact with the live part of the semiconductor element.

Therefore, as shown in Figure 5, the board (2) and the shield plate (
3), an insulating rubber block (8) as a spacer is interposed approximately in the center of the substrate (2) and the shield plate (3).
A predetermined distance is maintained between the two.

[Problems to be Solved by the Invention] Since the conventional shield plate mounting device is configured as described above, if the shield plate is warped as shown in FIG. There is a risk of touching the parts, and insulating rubber blocks are required to prevent this, resulting in an increase in cost.

This invention was made to solve the above problems, and it is a shield that prevents the shield plate from touching the live parts of the semiconductor element attached to the board without using an insulating rubber block that increases the cost. The purpose is to obtain a plate mounting device.

[Means for Solving the Problems] The shield temporary attachment device according to the present invention includes a hook (5) formed integrally with the housing, and a hole corresponding to the hook formed in the shield plate.

[Function] The hook (5) integrated with the casing of the present invention prevents the shield plate from warping by engaging with the hole edge of the hole in the shield plate, without using an intervening material such as an insulating rubber block. , to prevent the shield plate from touching the live parts of the semiconductor elements attached to the board.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. In FIG. 1, in which the same parts as in FIGS. 3 to 5 are given the same reference numerals, (5) is for hooking onto the hole edge of the square hole (3a) located approximately in the center of the shield plate (3). It is a hook and is formed integrally with the housing (4) out of plastic or the like.

When attaching the board (2) and shield plate (3) to the casing (4), first hook the shield plate (3) from the position shown by the two-dot chain line and fit the square hole (3a) into the hook (5), then, When the hook is moved to the left in the figure to the solid line position, the hook (5) hooks on the edge of the square hole (3a) as shown in FIGS. 1 and 2.

In this state, the board (2) is placed on the shield plate (3), and both (2>, (3)) are fixed to the four bosses (6) with screws (7).

In addition, in the above embodiment, the shield plate (2) is fixed at one location approximately in the center with a hook (5), but
It may be fixed at several locations depending on the area of the board.

[Effects of the Invention] As described above, according to the present invention, since the hook formed integrally with the housing is configured to engage with the square hole of the shield plate, warping of the shield plate can be reliably prevented. The distance between the live part of the semiconductor element and the shield plate can be maintained at one predetermined dimension.

Furthermore, since no insulating rubber block is required, there is an advantage that the cost does not increase.

[Brief explanation of drawings]

FIG. 1 is a front view showing an electronic device to which a shield plate mounting device according to an embodiment of the present invention is applied, and FIG.
-ff line, FIG. 3 is a plan view of an electronic device to which a conventional shield plate-cutting device is applied, and FIGS. 4 and 5 are front views thereof. In the figure, (1) is a semiconductor element, (2) is a substrate, and (3) is a semiconductor element.
) is the shield plate, (3a) is the square hole, (4) is the housing, (5
) is a hook. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent: Patent Attorney Masuo Oiwa (and 2 others) Figure 1jO Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] In electronic equipment where a semiconductor element mounting board is attached to a housing via a shield plate to prevent noise interference,
A device for attaching a shield plate for an electronic device, characterized in that a hook is provided integrally with the housing, and a hole for hooking the hook is provided in the shield plate.