Electromagnetic leakage prevention device
An anti-electromagnetic and electrical device technology, applied in the electronic field, can solve the problems of electromagnetic leakage, inability to guarantee the diameter of the opening, and increase the size of the installation hole, so as to achieve the effect of preventing electromagnetic leakage
Inactive Publication Date: 2016-02-17
SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
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Problems solved by technology
But sometimes some large electrical components, such as trackball mouse, ship-type switch, etc., the size of the installation hole is enlarged, and it cannot be guaranteed that the diameter of the hole or the ratio of the diameter of the circumscribed circle of the hole to the wall thickness is less than the engineering experience value. In this case, it is very difficult Easy to cause electromagnetic leakage
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[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection of the present invention. scope.
[0031] Such as figure 1 As shown, the embodiment of the present invention provides a device for preventing electromagnetic leakage, which may include:
[0032] Tubular box body 1, bottom cover plate 2, top cover plate 3;
[0033] The bottom cover plate 2 is covered on an open end of the cylindrical box body;
[0034] The top cover plate 3 is covered ...
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The invention provides an electromagnetic leakage prevention device comprising a cylindrical box body, a bottom cover plate and a top cover plate. The bottom cover plate covers one open end of the cylindrical box body. The top cover covers another open end of the cylindrical box body. A cavity is formed by the cylindrical box body, the bottom cover plate and the top cover plate. The cavity is used for placing a target electrical device. The top cover plate is provided with an opening. The shapes of the opening include circular and non-circular shapes. When the shape of the opening is circular, diameter of the opening and depth of the cylindrical box body meet a first formula, and the first formula is 32L / D<1>>=A, wherein L is the depth of the cylindrical box body, D<1> is the diameter of the opening, and A is a preset value. When the shape of the opening is non-circular, the diameter of the circumcircle of the opening and the depth of the cylindrical box body meet a second formula, and the second formula is 27L / D<2>>=A, wherein D<2> is the diameter of the circumcircle of the opening. According to the electromagnetic leakage prevention device, electromagnetic leakage can be prevented.
Description
technical field [0001] The invention relates to the field of electronic technology, in particular to a device for preventing electromagnetic leakage. Background technique [0002] In electronic equipment, some electrical components often need to be installed externally. Some small electrical components such as toggle switches, indicator lights and other small electrical components prevent electromagnetic leakage by ensuring the ratio of the diameter of the opening to the thickness of the plate. But sometimes some large electrical components, such as trackball mouse, ship-type switch, etc., the size of the installation hole is enlarged, and it cannot be guaranteed that the diameter of the hole or the ratio of the diameter of the circumscribed circle of the hole to the wall thickness is less than the engineering experience value. In this case, it is very difficult It is easy to cause electromagnetic leakage. Contents of the invention [0003] In view of this, the present in...
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IPC IPC(8): H05K9/00
CPCH05K9/0007
Inventor 杨振龙孙永升荆访锦
Owner SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD