46results about How to "Guaranteed electromagnetic shielding performance" patented technology

The invention provides an electromagnetic shielding protection film and an FPC (flexible printed circuit). The electromagnetic shielding protection film is simple in structure, relatively thin in thickness, excellent in electromagnetic shielding performance, particularly suitable for covering the bending region of the FPC, and capable of ensuring the electromagnetic shielding effect, the relatively thin thickness and a relatively good bending performance of the bending region. According to the FPC, the bending region is covered with the electromagnetic shielding protection film to replace the conventional electromagnetic shielding composite film with a relatively high thickness, so that the electromagnetic shielding effect, the relatively thin thickness and a relatively good bending performance of the bending region can be ensured; and when the FPC provided by the invention is adopted for connecting a display module and a mobile phone main board, the assembling difficulty of the display module and the mobile phone main board can be greatly lowered.

The invention relates to a cable assembly, a connector assembly and connector accessories thereof, the connector accessories include a metal sleeve for sleeving on a cable and connecting to a rear side of a connector shield, the inner diameter of the metal sleeve is greater than the outer diameter of the applicable cable, the connector accessories further include an elastic conductive member for sleeving in an annular space between the cable and the metal sleeve to conduct a cable shield of the metal sleeve and the cable, wherein the difference between the inner diameter and the outer diameteris larger than the difference between the inner edge and the outer edge of the annular space, and the annular space arranged between the cable and the metal sleeve ensures that the metal sleeve doesnot interfere with the cable in the process of screwing connection with the shield layer of the connector, so that the cable does not rotate with the metal sleeve; After the metal sleeve is fixed, a conductive part is filled into the annular space between the cable and the metal sleeve, so that the shield layer of the cable and the metal sleeve are conducted through the conductive part, thereby ensuring the electromagnetic shielding performance of the cable assembly, and the structure is simple.

The invention discloses a low-reflection and high-efficiency electromagnetic shielding material, which belongs to the technical field of electromagnetic shielding materials. The invention includes a composite electromagnetic shielding component composed of materials with different electromagnetic properties, the composite electromagnetic shielding component is composed of metal powder with relative conductivity ≥ 0.02, ferromagnetic material powder with relative magnetic permeability ≥ 1 and polymer dielectric material Composition, wherein the volume ratio of metal powder is between 70% and 97%, the volume ratio of ferromagnetic material powder is between 1% and 29%, and the volume ratio of polymer dielectric material is between 1% and 29%. On the basis of ensuring high-efficiency electromagnetic shielding through the compound effect, the present invention reduces the reflection of electromagnetic waves and increases the absorption of electromagnetic waves, so as to achieve the goal of reducing secondary pollution. According to the national military standard GJB6190-2008 of the People's Republic of China, the In the electromagnetic wave frequency range, the shielding effectiveness reaches above 60dB (Class B).

A wire harness (10 to 13, 31) includes one or more conducting paths (19), a protective member (20) that is formed in a pipe shape, and accommodates the one or more conducting paths (19) in the protective member (20) to shield a electromagnetic wave emitted from the one or more conducting paths (19). The protective member (20) is formed of resin composition that has conductivity.

The invention discloses a camera cover anti-dropping rope structure of a monitoring camera device, which comprises a shielding platform, an anti-fall seat, a chain rope and a camera monitoring room. A fixing plate is installed on the back of the shielding platform, and a There are two sets of anti-falling seats arranged in parallel, the two side surfaces of the shielding platform are connected with chain ropes through handles, the bottom of the shielding platform is equipped with a camera monitoring room, and the tail end of the chain rope is connected with a fixed ring, The bottom of the fixed ring is welded with a camera cover, and the inner central position of the camera cover is equipped with a fitting frame through a rectangular opening, and four shading plates are installed inside the camera monitoring room, and the shading plates are diamond-shaped, The visor is made of black PC board. The invention is provided with a chain rope, which can be folded and fixed to ensure the service life of the device while flexibly changing the length of the rope to avoid entanglement with other components, thereby ensuring the normal use of the device.

The invention discloses a silver-plated fiber, a multi-layer compound fabric of the silver-plated fiber and an after-treatment method of the fabric. The silver-plated fiber comprises a silver fiber body which is composed of a nylon fiber and a silver layer which wraps the surface layer of the nylon fiber, a bonding layer is formed between the silver layer and the nylon fiber, and the surface of the silver layer is coated with a protective layer which prevents the silver layer from being scratched in the weaving process. The after-treatment method of the multi-layer compound fabric of the silver-plated fiber includes the following steps of firstly, preparing the fabric of the silver-plated fiber, secondly, conducting enzyme treatment, thirdly, washing, and fourthly, stoving. A plant enzyme treatment mode is adopted for after-treatment, the problem that the silver layer is damaged due to the adoption of traditional alkali liquor treatment is solved, the bonding layer of the silver-plated fiber and the nylon fiber is effectively protected, firmness of the silver-plated fiber is improved, the electromagnetic shielding effect of the fabric of the silver-plated fiber is effectively improved, and the service life of the fabric is prolonged.

The invention discloses a method for producing a nickel-plated carbon fiber board having electromagnetic shielding property. The method includes the steps: step 1, carbon fiber cloth surface treatment; step 2, magnetron sputtering nickel plating of the carbon fiber cloth surface; step 3, copper electroplating of the carbon fiber cloth surface; step 4, nickel electroplating of the carbon fiber cloth surface; step 5, drying; and step 6, board pressing. The nickel-plated carbon fiber plate has the electromagnetic shielding effectiveness of more than 40 dB in a 150 kHz-18 GHz electromagnetic field, and the stability of the electromagnetic shielding effect of carbon fiber cloth can be effectively improved through the nickel-copper-nickel three-plating-layer structure design; and through the composite material molding, a resin layer on the nickel-plated carbon fiber surface improves the corrosion resistance of the product.

A shielding case assembly comprises a metal shielding shell and a heat dissipation module. The metal shielding shell comprises a plurality of walls and an accommodating space defined by the pluralityof walls, and the accommodating space is provided with a front-end socket. The heat dissipation module is assembled on one wall of the metal shielding shell; the heat dissipation module comprises a hot plate which is connected to the metal shielding shell in a covering manner and is used for assembling the wall of the heat dissipation module; the hot plate comprises a first section used for covering the wall of the metal shielding shell and extending backwards to the rear side edge of the wall, and a second section which extends backwards out of the rear portion of the metal shielding shell from the rear side of the first section; and the heat dissipation module further comprises a first heat dissipation piece which is arranged on the top face of the hot plate and extends from the first section to the second section.