JPH0470792U

JPH0470792U -

Info

Publication number: JPH0470792U
Application number: JP11505490U
Authority: JP
Priority date: 1990-10-30
Filing date: 1990-10-30
Publication date: 1992-06-23

Description

[Brief explanation of the drawing]

第１図はこの考案のシールドケースの一実施例
を示す斜視図、第２図は同上の縦断正面図、第３
図は要部の拡大縦断正面図、第４図は要部の分解
斜視図、第５図は要部の結合前の拡大縦断正面図
、第６図は同上の拡大縦断側面図、第７図は同上
の結合状態の拡大縦断側面図、第８図は他の実施
例を示す要部の拡大縦断側面図、第９図は鍔状部
のインピーダンス減衰効果を説明するための縦断
側面図、第１０図は従来例を示す斜視図、第１１
図は同上の縦断正面図、第１２図は従来のシール
ドケースの隙間発生状態を示す拡大縦断面図、第
１３図は同上部分の等価回路図である。１１……プリント回路板、１２……電磁シール
ドケース、１３……上ケース、１４……下ケース
、１５，１６……鍔状部、１７，２３……孔、１
９……爪、２１……係止部、２２……斜面、２５
，２６……回路、２７……半田、２９……端部、
３０……回路パターン、３１…隙間。 Fig. 1 is a perspective view showing an embodiment of the shield case of this invention, Fig. 2 is a vertical sectional front view of the same, and Fig. 3 is a perspective view showing an embodiment of the shield case of this invention.
The figure is an enlarged longitudinal sectional front view of the main parts, Fig. 4 is an exploded perspective view of the main parts, Fig. 5 is an enlarged longitudinal sectional front view of the main parts before joining, Fig. 6 is an enlarged longitudinal sectional side view of the same as above, and Fig. 7 8 is an enlarged longitudinal sectional side view of the main part showing another embodiment. FIG. 9 is a longitudinal sectional side view for explaining the impedance damping effect of the brim. Figure 10 is a perspective view showing a conventional example;
The figure is a longitudinal sectional front view of the same as the above, FIG. 12 is an enlarged longitudinal sectional view showing a state in which a gap occurs in a conventional shield case, and FIG. 13 is an equivalent circuit diagram of the same as the above. DESCRIPTION OF SYMBOLS 11... Printed circuit board, 12... Electromagnetic shielding case, 13... Upper case, 14... Lower case, 15, 16... Flange-shaped part, 17, 23... Hole, 1
9...Claw, 21...Locking part, 22...Slope, 25
, 26... circuit, 27... solder, 29... end,
30...Circuit pattern, 31...Gap.

Claims

[Claims for Utility Model Registration] (1) An electromagnetic shielding case to be attached to a printed circuit board, characterized in that the case is provided with a flange-like part parallel to the printed circuit board in the part that comes into contact with the printed circuit board. Electromagnetic shield case. (2) The above-mentioned electromagnetic shielding case consists of an upper case and a lower case that are attached above and below the printed circuit board, and a hole is provided in the flange-like part of one case, and the above-mentioned printed circuit board is provided in the flange-like part of the other case. 2. The electromagnetic shielding case according to claim 1, further comprising a claw that passes through the hole and engages with the hole in the brim of the one case. (3) The locking part at the tip of the claw of the electromagnetic shielding case is widened, and the claw is passed through the hole in the printed circuit board and engaged with the hole in the flanged part of one case. 2. The electromagnetic shielding case according to claim 2, wherein by twisting the locking portion, a tensile force is applied to the shielding case in the direction of the printed circuit board, thereby pressing the upper and lower flanges against the upper and lower sides of the printed circuit board. (4) The flanged portion of the electromagnetic shielding case has an inclination angle with respect to the printed circuit board in a free state, and the tensile force acting on the shielding case in the direction of the printed circuit board during assembly causes the flanged portion to 4. The electromagnetic shielding case according to claim 3, wherein the electromagnetic shielding case is crimped to a printed circuit board so as to be parallel to the printed circuit board.