CN2519938Y

CN2519938Y - Electromagnetic shielding device for side board of computer casing

Info

Publication number: CN2519938Y
Application number: CN 01266076
Authority: CN
Inventors: 李晓忠; 谢予明; 薄亮; 刘铁英
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2001-11-09
Filing date: 2001-11-09
Publication date: 2002-11-06
Anticipated expiration: 2011-11-09

Abstract

The utility model discloses an electromagnetic shielding device of computer case side plate. A blank holder and a flanging holder are integrally arranged at the combinational part of the side plate and the front plate along the length direction of the lateral edge of the side plate. The blank holder is attached tightly at the lateral edge of the side plate, and a U-shaped groove is formed between the blank holder and the flanging holder. The edge of the front plate is integrally provided with a corresponding flanging holder, and the flanging holder is integrally provided with elastic tablets with intervals. Convex contacts are arranged at the front end of the elastic tablets. The flanging holder of the front plate is inserted into the U-shaped groove of the lateral edge of the side plate, and the contacts of the elastic tablets are arranged to contact the inner wall of the U-shaped groove of the side plate. The utility model can essentially improve the unreliability of the computer case side plate shielding structure, and thoroughly avoid the leakage and invasion of high frequency electromagnetic wave.

Description

The electromagnetic screen of computer cabinet side board

[technical field]

The utility model relates to a kind of electromagnetic screen of computer cabinet side board.

[background technology]

The shielding construction of the cabinet side board anti-electromagnetic radiation of tradition on the computer mostly is that multiple spot contacts with the shielding of realization to frequency electromagnetic waves between side plate segmentation bending and the corresponding flanging of header board sheet metal component, this structure is carried out bending to the edge direction segmentation on the basis of side plate turnover reinforced structure, form the extrorse plurality of V shape of opening surface groove, utilize the installation power of enforcement to force the header board flanging to contact, thereby guarantee with the shielding requirements under the discontinuous point way of contact with the segmentation V-shaped groove.Yet, the shielding mounting structure of this traditional anti-electromagnetic radiation can not guarantee that the segmentation V-shaped groove contacts with the reliable of header board flanging, use and repeatedly behind the installing/dismounting through long-term, V-shaped groove might produce plastic deformation, thereby cause unreliable contact, produce long slit, frequency electromagnetic waves just can pass through from the slit like this, thereby causes electromagnetic hazards such as interference, radiation infringement.

[utility model content]

The purpose of this utility model is to provide a kind of electromagnetic screen of computer cabinet side board, fundamentally improves the unreliability of cabinet side board shielding construction, thoroughly stops the leakage and the intrusion of frequency electromagnetic waves.

In order to achieve the above object, the utility model provides a kind of electromagnetic screen of computer cabinet side board, be arranged on the junction of side plate and header board, it is characterized in that: the lateral margin of this side plate is integrally formed with flanging and the flanging that is bent into along its length, the lateral margin place of side plate is close in this flanging, form U-lag between this flanging and the flanging, the edge of this header board is integrally formed with corresponding flanging, on this flanging, be integrally formed with the shell fragment of inclination at interval, the shell fragment front end is provided with the contact of projection, the flanging of this header board inserts in the U-lag of side plate lateral margin, and the contact of this shell fragment contacts the inwall of this side plate U-lag.

The electromagnetic screen of computer cabinet side board of the present utility model is according to the wave propagation characteristic, makes the mating part of side plate and header board form the shielding construction of the shape slit that turns back, and is aided with the contact of punching press shell fragment simultaneously, can have splendid effectiveness.

[description of drawings]

Fig. 1 is the structural representation of preferred embodiment of the present utility model.

Fig. 2 is an above-mentioned preferred embodiment structural representation from another viewpoint.

[embodiment]

With reference to Fig. 1,2, the electromagnetic screen of computer cabinet side board of the present utility model, be arranged on the junction of cabinet side board 4 and cabinet header board 3, after these side plate 4 flanging, flanging forms U-lag 43 once more forward, the lateral margin that is side plate 4 is integrally formed with flanging 41 and the flanging 42 that is bent into along its length, the lateral margin place of side plate 4 is close in this flanging 41, form U-lag 43 between this flanging 41 and the flanging 42, the edge of this header board 3 is integrally formed with corresponding flanging 31, the interval one is gone out the shell fragment 32 of slight inclination on this flanging 31, shell fragment 32 front ends are provided with the contact 33 of projection, the flanging 31 of this header board 3 inserts in the U-lag 43 of side plate 4 lateral margins, the inwall of contact 33 these side plate U-lags 43 of contact of this shell fragment 32.Cabinet side board 4 is withstood in contact 33 during assembling, and power of enforcement is installed forces shell fragment 32 distortion, the reliability that shell fragment 32 relies on elasticity to keep in touch, thus cut apart U-lag 43, auxiliary U-lag 43 structures realize electromagnetic screen.

Claims

1, a kind of electromagnetic screen of computer cabinet side board, be arranged on the junction of side plate and header board, it is characterized in that: the lateral margin of this side plate is integrally formed with flanging and the flanging that is bent into along its length, the lateral margin place of side plate is close in this flanging, form U-lag between this flanging and the flanging, the edge of this header board is integrally formed with corresponding flanging, on this flanging, be integrally formed with the shell fragment of inclination at interval, the shell fragment front end is provided with the contact of projection, the flanging of this header board inserts in the U-lag of side plate lateral margin, and the contact of this shell fragment contacts the inwall of this side plate U-lag.