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881results about "Screening casings" patented technology

Machining method of clearance area of shell, shell and mobile terminal

ActiveCN105657101AEnsure the integrity of the appearanceReduce usageScreening casingsMetal casingsFilling materialsLaser cutting
The invention discloses a machining method of a clearance area of a shell. The method comprises the steps that the shell is provided, wherein the shell is made of signal shielding materials and provided with a preset area, and the preset area comprises a first surface and a second surface which are oppositely arranged; at least one support structure is machined on the first surface of the preset area; a laser cutting machine is aligned with the second surface of the preset area, a preset number of hair cracks are cut in the preset area, and the hair cracks are arranged at intervals in parallel; each hair crack is filled with materials which do not shield signals, so that the clearance area is obtained; the support structures are cut out. According to the machining method of the clearance area of the shell, the preset number of the hair cracks are cut in the shell through lasers, and the hair cracks are filled with the materials, so that the clearance area is formed, and the clearance area with a specific shape is obtained; meanwhile, due to the fact that the hair cracks are narrow, the proportion of the materials which do not shield the signals in the shell is decreased, and the appearance integrity of the shell is guaranteed. The invention further provides the shell and a mobile terminal.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD

Electromagnetic radiation insulated electrical appliance

An electrical appliance and, particularly, a hand-held appliance of the type used in close proximity to an individual, such as a hair dryer, cellular telephone, or the like, and which is shielded from emission of electromagnetic radiation. Appliances which are particularly susceptible to generation of electromagnetic radiation are those which include electrical coils as, for example, transformer coils or heating coils. In all cases, the appliance is provided with a shield substantially covering the exterior surface of the appliance. In the case of a hair dryer and similar appliances which have a long tubular barrel and a hand grip portion, both the barrel and the hand grip portion are completely covered with an electromagnetic insulating material. The preferred electromagnetic insulating materials which may be employed, for this purpose, are materials having a high degree of magnetic permeability, usually in the nature of iron alloys. Also in accordance with the present invention, it has been found that by double winding any coils, that is having a first set of coils wound in a first direction and a second set of coils wound in a second direction, that radiation emission is substantially reduced. It has also been found that when the electrical wire extending through the appliance is wound in the form of a braid, that electromagnetic radiation is still further reduced.
Owner:RASHID ABUL
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