69results about How to "Good shielding effect" patented technology

To improve, in an encapsulated circuit module having a metal shield layer covering a surface of a resin layer containing filler, a shielding property of the shield layer against electromagnetic waves.

The encapsulated circuit module has a substrate 100 on which electronic components are mounted, covered with a first resin 400. A surface of the first resin 400 is covered with a shield layer 600 including a first metal covering layer 610 made of copper or iron and a second metal covering layer 620 made of nickel. Each of the first metal covering layer 610 and the second metal covering layer 620 is thicker than 5 μm.

The invention discloses a skin moisturizing cream with a corticosteroid-dependent dermatitis repairing function. The skin moisturizing cream comprises at least one plant extract with the function of activating epidermic basal cells to fissure, at least one plant extract capable of providing nutrition needed by growth of the epidermic basal cells, at least one plant extract capable of enhancing the epidermal barrier function, at least one natural extract with remarkable moisturizing effect, at least one plant extract with the functions of heal wounds and repairing scars, emulsifying agents, pure natural vegetable oil, moisturizing agents, thickening agents, anticorrosive agents, chelating agents and deionized water. The skin moisturizing cream with the corticosteroid-dependent dermatitis repairing function takes hydrogenated lecithin as the emulsifying agents to prepare a liquid crystal emulsifying system, good shielding effect on skins is achieved, permeation of effective components is facilitated, and the skin moisturizing cream has good moisturizing effect and product use feeling.

The invention relates to an audio and video signal transmission conduction wire which comprises an inner conductor, and a PE (Polyethylene) insulation layer, a composite shielding layer and a PE outer sheath layer that are layered and covered from inside to outside, beginning from the inner conductor, wherein the PE insulation layer, the composite shielding layer and the PE outer sheath layer that are layered and covered from the inside to the outside are formed by once injection moulding via a multilayer coextrusion production technology; the composite shielding layer is mixed by and comprises the following raw materials in parts by weight: 70-80 parts of polyvinyl resin, 10-20 parts of PE flexibilizer, 20-40 parts of metallic coating graphite powder, 10-20 parts of electromagnetic powder, 2-5 parts of stabilizing agent having an acid absorbing effect, 2-3 parts of PE lubricating agent, 1-3 parts of PE modifying agent or 1-3 parts of elastomer, and 10-30 parts of PE synthetizing agent. The wire has an excellent conduction shielding effect, is tasteless and nontoxic, and has the advantages that the wire is light in weight, low in cost and corrosion-resistant, copper products and energy consumption can be saved, and production equipment is simpler.

The invention relates to a connector. The connector comprises a plug, a socket, a locking mechanism. The locking mechanism comprises a locking buckle, wherein the locking buckle comprises a first locking device and a second locking device the second locking device comprises a sliding groove and a clamping boss, the sliding groove is formed in the plug, the clamping boss is arranged on the socket,and the second locking device can be unlocked after the first locking device is unlocked and after the clamping boss slides to an end part of the sliding groove along a disconnection direction. By three locking mechanisms, interlocking and disconnection delay is achieved; by a pause of unlocking the second locking device, an effect of interlocking and disconnection delay is achieved, an interlocking signal needle is enabled to be disconnected, so that the interlocking signal needle is protected; and by 360-degree contact of a shielding spring and 360-degree shielding elastic sheet contact of atail part, 360-degree shielding is achieved, many contacts are shielded, and a shielding effect is good.

The invention relates to an LED (Light-Emitting Diode) epitaxial structure, which comprises a substrate, a buffer layer, a sacrificial layer, an N type gallium nitride layer, a quantum well layer and a P type gallium nitride layer which are sequentially arranged from bottom to top, wherein a light shielding layer is also arranged between the sacrificial layer and the quantum well layer, and the light shielding layer is one layer or multiple layers of graph-free membranes, or the light shielding layer comprises a plurality of graphical sub light shielding layers and connecting layers; and the graphs of the sub light shielding layers are mutually matched, so that laser incident from the substrate direction can be blocked by the sub light shielding layers when the substrate is subjected to laser lift-off. Meanwhile, the invention provides a preparation method of the LED epitaxial structure. When the substrate of the LED epitaxial structure is subjected to laser lift-off, the light shielding layer reduces or blocks the laser to penetrate through the light shielding layer to reach the quantum well layer.

The invention belongs to the technical field of coating machine products, and particularly discloses magnetron sputtering vacuum coating equipment which comprises a vacuum coating chamber with an extraction opening, and a control power source. The side wall of the vacuum coating chamber is provided with a plurality of sets of vertical type planar twin magnetron targets, and an opening-closing type baffle device is arranged around the planar twin magnetron targets. A vertical type planar ion source is arranged in the vacuum coating chamber. According to the magnetron sputtering vacuum coating equipment, workpiece films are evenly deposited, the performance is stable, and the coating efficiency and effects of workpieces are greatly improved; and in addition, the equipment is simple, practical and low in manufacturing cost.

The invention discloses an anti-interference mobile phone microphone. The anti-interference mobile phone microphone comprises a metal shell, wherein an ECM, a triode, a first resistor, a second resistor and a third resistor are arranged in the metal shell, a first capacitor is arranged outside the metal shell, and a grounding terminal is arranged on the metal shell; the base electrode of the triode is grounded through the ECM, the collector electrode of the triode is connected with a VCC power supply end and one end of the second resistor through the first resistor, and the other end of the second resistor is connected with a Vs power supply end and is also connected with the output end of the mobile phone microphone through the first capacitor; the emitting electrode of the triode is grounded through the third resistor, and the grounding terminal is connected to the ground where a mobile phone mainboard is located; the ECM and the metal shell are not located on the same ground. According to the anti-interference mobile phone microphone, due to the fact that the metal shell of the microphone is connected to the ground where the mobile phone mainboard is located, breakover between the ground where the metal shell is located and the ground where a microphone circuit is located is avoided, and a good shielding effect is achieved.

The invention provides a gamma-ray radiation protection composite material and a preparation method thereof. The radiation protection composite material takes maleic anhydride grafted modified linearlow density polyethylene (LLDPE) as matrix resin and a low-melting-point bismuth alloy as a radiation protection agent, a rheological modifier and an antioxidant are matched, so that the gamma-ray radiation protection composite material is prepared. The preparation method includes the steps: mixing components according to determined component proportion; placing mixture into a mixer; melting and blending the mixture at the temperature of 160-180 DEG C to prepare the composite material. The gamma-ray radiation protection composite material has good toughness, low-temperature resistance and ageing resistance and excellent anti-radiation performance, and a production method is easy. The gamma-ray radiation protection composite material has a wide application prospect in the field of aerospaceindustry, nuclear power, radioactive medicine and the like.

The invention discloses a method for convenient shielded box operation, comprising arranging a front opening connecting to the testing space of the box at the box frontage, meanwhile, arranging an embedded chamber formed by the inner concave at both sides of the box; arranging a pneumatic device in the embedded chamber, and arranging a forward door of the sealed front opening invented at the front opening, and connecting the forward door with the pneumatic device; arranging an electronic control module in the embedded chamber, and connecting the electronic control module with the pneumatic device; arranging a switch button under electrical connection with the electronic control module outside of the box, and controlling the forward door opening and closing by pressing or long pressing the switch button; arranging a speed button under electrical connection with the electronic control module outside of the box, and controlling the moving speed of the forward door via the speed button. The method for convenient shielded box operation enables convenient shielded box operation with good safety, convenient maintenance and good shielding effect.

A glass mold polishing machine of an improved structure comprises a machine base, a chuck driving mechanism, a bottle mold clamping and placing mechanism, a machine frame, a lifting-frame lifting driving mechanism, a lifting frame and a polishing mechanism, wherein an enclosure box is arranged on the upper portion of the machine base, a machine base cavity is arranged in the lower portion of the machine base, the chuck driving mechanism is arranged in the machine base cavity, the bottle mold clamping and placing mechanism is arranged in a cavity of the enclosure box, the machine frame is fixed to the upper portion of the machine base, the lifting-frame lifting driving mechanism is arranged on the machine frame, the lifting frame is arranged on the machine frame, and the polishing mechanism is arranged on the lifting frame. The lifting-frame lifting driving mechanism comprises a lifting frame motor, a lifting frame reduction gearbox and a lifting frame screw, wherein the lifting frame motor is in transmission fit with the lifting frame reduction gearbox, the lifting frame screw is arranged in a screw cavity of the machine frame, and a lifting frame nut is fixed to the lifting frame. The glass mold polishing machine of the improved structure is characterized by further comprising a cooling and lubricating medium supplying mechanism, wherein the cooling and lubricating medium supply mechanism is arranged on the machine frame, a screw supporting plate is arranged on the machine frame, the lower end of the lifting frame screw is supported by the screw supporting plate, and a telescopic protective cover is arranged on the machine frame. The glass mold polishing machine of the improved structure is convenient to overhaul and maintain and safe in use, improves stability and the polishing effect, guarantees the stability of up-and-down motion of the lifting frame and saves the labor resource.

The invention discloses an undersea four-core oil-filled cable which is formed by twisting two insulation line cores, an optical fiber communication cable core and a data line core. A filling layer is arranged at a gap of the cable core. An inner protecting layer, a shielding layer, a water resisting layer, an armor layer and an outer sheath are arranged outside the cable core in sequence. A conductor is of a hollow structure, an oil duct is arranged in the conductor, and a plurality of strengthening cores are arranged at the gap of the cable core after the cable core is twisted. By the undersea four-core oil-filled cable, data transmission and power transmission can be achieved at the same time, the shielding effect is good, the electromagnetic interference resistance capacity is high, the outer diameter of a core wire is small, the level of pressure resistance and the tensile strength are high, high water pressure of deep sea wire distribution of an undersea detecting instrument can be borne, and the working requirements of undersea projects and oil platforms are met. In addition, by the arrangement of the multiple strengthening cores, the cable core of the undersea four-core oil-filled cable is not prone to being broken, and the service life is long.

The invention relates to a large-pair-number shielding cable. The cable comprises a center pipe, first cable pairs, a first shielding layer, second cable pairs, an isolating layer, a second shielding layer and a restrictive coating, wherein the first cable pairs are annularly arranged on the surface of the outer circumference of the center pipe, the first shielding layer wraps the first cable pairs, the second cable pairs are annularly arranged on the surface of the outer circumference of the first shielding layer, the isolating layer wraps the second cable pairs, the second shielding layer wraps the isolating layer, and the restrictive coating wraps the second shielding layer. The first shielding layer and the second shielding layer are made of double-layer aluminum foil. The double-layer aluminum foil comprises a first aluminum foil layer and a second aluminum foil layer, and a strengthening layer is arranged between the first aluminum foil layer and the second aluminum foil layer. The large-pair-number shielding cable is good in electromagnetic shielding effect, stable in signal transmission, good in effect and compact in structure. In the actual wiring construction process, the relative position between the cable pairs cannot be changed irregularly under the condition that the cable is affected by external force, the overall quality of the cable is stable, and the service life is long.

An electrical connector assembly includes an insulating body, multiple signal terminals received in the insulating body, a metal ground member fixed on the insulating body, and at least one ground core wires. The metal ground member has a plate surface and a cutting surface connected with the plate surface. The ground core wire is soldered to the cutting surface. The cutting surface is rough, the frictional force between the cutting surface and the ground core wires is great.

The invention relates to a surface acoustic wave filter ceramic package with a special shielding effect and a method. The surface acoustic wave filter comprises a ceramic substrate and a surface acoustic wave filter chip, the ceramic substrate is provided with a grounding metal part. An electrode is arranged on a circuit loop of the surface acoustic wave filter chip and is connected to a ground metal portion located on the ceramic substrate through a gold ball, wherein the surface of the surface acoustic wave filter chip is coated with a layer of white glue dry film, the edge of the white gluedry film is fixed on a grounding metal part on the upper surface of the ceramic substrate, a metal film layer is arranged outside the white glue dry film, the edge of the white glue dry film is alsofixed on the grounding metal part on the upper surface of the ceramic substrate, and a layer of black glue dry film is arranged outside the metal film layer. According to the invention, the shieldingeffect is good, the size application range is large, the cost is reduced and the product size is reduced by adopting a gold ball embedding mode, and the grounding metal part of the ceramic base is connected with the sputtering metal layer in series to realize the special shielding effect of ceramic packaging, so that the attenuation characteristic of the product is improved, and the product yieldis greatly improved.

The invention discloses an oil-resistant water-proof corrosion-resistant double-shielded control cable for a coal mine. The control cable comprises main cable cores, control cable cores, a taping layer, an insulating layer, a shielding layer, a water-proof layer and a protective sleeve. An inner shielding layer is arranged between the taping layer and the insulating layer. The inner shielding layer is formed by wrapping nickel-plated copper aluminum alloy wires around silicone rubber in parallel in a braided mode. A heat insulation layer is arranged between the shielding layer and the water-proof layer in a wrapped mode. A grounded cable core and the control cable cores are wrapped in the heat insulation layer. The protective sleeve is a sheath formed by wrapping steel wires in butyronitrile, and an anti-corrosive agent and an oil-resistant agent are added on the protective sleeve. The cable has good conductivity and is resistant to high temperature, resistant to dragging and bending and resistant to mechanical abrasion, thereby being mainly applied to the fields of coal mines, communication, chemical engineering, petroleum and the like. Besides, the cable has a good shielding effect and excellent corrosion resistance and is waterproof and capable of resisting oil.

The invention discloses a fabric capable of shielding against electromagnetic waves. The fabric comprises a surface layer and a lining layer. The surface layer and the lining layer are fixedly connected with each other through a connecting layer, one end of the connecting layer is connected with the surface layer, the other end of the connecting layer is connected with the lining layer, the connecting layer is multiple Faraday cage layer bodies formed by weaving sliver fiber, the surface layer is formed by weaving blended yarn of regenerated cellulose fiber and the sliver fiber in the weight ratio of (1-5):1, and the lining layer is formed by weaving silver nylon multifilament. By means of the fabric, the shielding effect on the electromagnetic waves is strengthened, the shielding effect is excellent, and the fabric is convenient to clean, long in oxidation period, good in sense of touch and good in elasticity.

The invention discloses an isolation type composite cable and relates to the technical field of cables. The cable comprises a reinforcing core and three cable core wires, and a loose sleeve layer, aninner shielding layer, a water isolating layer, a copper strip shielding layer, an isolation layer, a polyvinyl chloride outer sheath layer and an outer wear-resistant layer are sequentially wrapped outside the reinforcing core and the three cable core wires, and gaps in the loose sleeve layer are filled with water-blocking paste, the thickness of the upper end of the outer wear-resistant layer is smaller than the thickness of the lower end, the isolation layer is made of inorganic mineral insulating layers. The device has the advantages of simple structure, multiple shielding, good shieldingeffect, and moisture prevention.

This invention discloses a switch power module packaged in an Al shell composed of an IC,a fieldistor, resistors, a transformer, a diode and capacitors with good radiation and shield, no radiation and good voltage regulation, simple structure and low cost.

The invention discloses an LCD connector and a mobile terminal, and relates to the technical field of mobile terminal equipment. The LCD connector comprises LCDs, a connecting plate used for fixing the LCDs and a shielding frame; the connecting plate is provided with exposed copper, and the shielding frame is welded to the connecting plate through the exposed copper. According to the LCD connector and the mobile terminal, a conductive fabric is replaced with the shielding frame, therefore, complete shielding can be achieved, the shielding effect is good, and the cost is low.

The invention discloses a shielding sheet with an air gap and a manufacturing method of the shielding sheet. The shielding sheet comprises a magnetic sheet, wherein an air gap structure is arranged onthe magnetic sheet, and the air gap structure is in a radiation shape. The magnetic conductivity is gradually changed by means of the radiation-shaped air gap structure, the performance of the shielding sheet is improved, and high charging efficiency and thinner thickness can be achieved at the same time.

The invention discloses a silicone rubber composition. The silicone rubber composition is prepared from the following components in parts by weight: 100 parts of methyl vinyl silicone rubber; 25 to 60 parts of reinforcement filler; 100 to 400 parts of X-ray absorbent; 2 to 20 parts of processing agent; and 0.2 to 3 parts of cross-linking agent. The silicone rubber composition adopts the methyl vinyl silicone rubber as a base material to be combined with the reinforcement filler, the X-ray absorbent, the processing agent and the cross-linking agent to generate the silicone rubber composition, after being cured, the silicone rubber composition has good shielding and protective effect for X-rays, also has good weather resistance, mechanical strength and toughness, is conveniently made into various types of protective products and is suitable for being popularized to use.

The invention discloses a novel environment-friendly intrinsic safety cable for an explosion-proof place and belongs to the technical field of cable application. The novel environment-friendly intrinsic safety cable for the explosion-proof place comprises three cable cores. Each cable core is internally provided with two groups of twisted wire cores. Each group of wire cores comprises a copper conductor, a first semi-conductive nylon tape wrapping the outer side of the copper conductor, and a cross-linked polyethylene insulating layer wrapping the outer side of the first semi-conductive nylontape in an extruded manner. Compared with the prior art, the cable has the advantages of simple structure, low cost, good insulation and shielding performance, effective electromagnetic interference prevention, small external magnetic field interference force, excellent fireproof and explosion-proof performance, good safety performance, high strength, good compression resistance and good pressureresistance. The cable solves the problems of poor physical performance, large smoke amount during combustion and generation of a large amount of toxic and harmful gas during combustion of the existingcable. Compared with the traditional intrinsic safety cable, each performance can reach or even exceed the national standard requirement, and is superior to the existing similar cable.

The invention belongs to the field of a building material, and discloses a ray-proof composite wallboard for an electric power dispatching machine room. The ray-proof composite wallboard comprises the following raw materials in parts by weight: 1-2 parts of a ray-proof agent,1-2 parts of a fire retardant, 2-3 parts of a foaming agent, 3-5 parts of graphite powder, 30-50 parts of polypropylene resin, and 50-70 parts of polystyrene particles. The composite wallboard has good flame retardation and insulation effects, has good electromagnetic shielding function, and is suitable for being used in the electric power dispatching machine room.

The invention relates to a radiation-resistant lead-containing transparent plastic and a preparation method thereof. The preparation method comprises the following steps: adding unsaturated lead carboxylate, an optical property modifier and an acrylic monomer into a container, heating at 80 +/-5 DEG C, stirring and dissolving until the system is clear and transparent; adding an initiator, and carrying out vacuum defoaming treatment after the initiator is dissolved; and finally, carrying out gradient heating polymerization reaction, and cooling to room temperature after polymerization to obtain the radiation-resistant lead-containing transparent plastic. The lead-containing transparent plastic prepared by the invention is high in lead content, good in shielding effect and excellent in anti-radiation performance; under the condition of high lead content, excellent optical performance can still be kept, and good radiation resistance is achieved; and the formula system is simple, and polymerization is controllable.

The invention discloses a connecting structure of a battery box and a high-voltage connector shielding ring, a battery box and an automobile. The connecting structure of the battery box and the high-voltage connector shielding ring comprises a battery box body, a mounting hole is formed in the battery box body, and the connecting structure is characterized in that the battery box body comprises acarbon fiber inner layer, a metal middle layer and a carbon fiber outer layer; and a metal sleeve is embedded in the mounting hole and is in contact connection with the metal middle layer. Good conductor mutual communication is achieved, it is guaranteed that the contact resistance of the high-voltage connector shielding ring and the carbon fiber box body is greatly reduced, the electromagnetic shielding effect is good, and therefore it is guaranteed that a battery management system and other vehicle-mounted electronic components are not subjected to electromagnetic interference, and the accident occurrence probability is reduced.

The invention relates to the technical filed of a connector, particularly to a series shielding type back board connector used for current or signal transmission between circuit boards in a server, anexchanger or a storage. The series shielding type back board connector has conductive plastic; the conductive plastic is provided with a grounding pin, a signal pin and a metal shielding sheet; and an elastic sheet in elastic and fixed contact with the conductive plastic is arranged on the metal shielding sheet. By setting the elastic sheet on the metal shielding sheet, the metal shielding sheetis fixed on the conductive plastic firstly; and in addition, the conductive plastic is conductive, so that the metal shielding sheets can be connected in series after the elastic sheet is in contact with the conductive plastic, thereby achieving an obvious shielding effect, and enabling the signal stability and high-frequency performance of the whole back board connector to be obviously improved.

The invention discloses a cooling voltage withstand cable, comprising a conductor, an insulating layer, a first conducting layer, a cooling layer, a second conducting layer, a shielding layer and a sheath, wherein the insulating layer is wrapped at the outside of the conductor in an extrusion manner, the first conducting layer is wrapped at the outside of the insulating layer in the extrusion manner, the cooling layer is wrapped at the outside of the first conducting layer in the extrusion manner, the second conducting layer is wrapped at the outside of the cooling layer in the extrusion manner, the shielding layer is wrapped at the outside of the second conducting layer in the extrusion manner, and the sheath is wrapped at the outside of the shielding layer in the extrusion manner. The cooling voltage withstand cable disclosed by the invention has a simple and reasonable structure and can effectively cool to prevent fire.

The invention belongs to the technical field of cable shielding tape production and relates to an efficient anti-interference cable shielding tape production process. The process comprises the following steps of: step 1, unwinding and transmitting a base material; 2, machining the base material in the unwinding process to form a plurality of pressing holes; step 3, applying an adhesive to the basematerial with the machined pressing holes; step 4, drying the adhesive coating on the base material; step 5, pasting a film on the surface of the dried base material to form a shielding tape. According to the production process, the pressing holes are formed in the base material in a rolling mode; the PET film is attached to the base material through the applied adhesive, so that the cable shielding tape can be obtained. When being applied to a cable, the cable shielding tape has the advantages of low overall structure cost, good shielding effect and long service life.

The invention discloses a shielding device of a camera. The shielding device of the camera includes a first copper exposed area arranged on a PCB, and a shielding frame attached onto the first copper exposed area, wherein the first copper exposed area is located at the periphery of a camera connector. According to the shielding device provided by the invention, rigid connection is adopted, and therefore, the shielding device has little possibility of being damaged and an excellent shielding effect, and can well support a soft circuit board on the camera.

The invention relates to a smart phone shielding cabinet. The smart phone shielding cabinet comprises a main body frame, a plurality of mobile phone storage modules and a function control device are arranged on the main body frame and are used for accommodating mobile phones; the plurality of mobile phone storage modules are arranged on the main body frame in an array manner; wherein each mobile phone storage module is provided with a sealed storage cabin body and a cabin door, the cabin door is locked in the storage cabin body through an electronic lock, the function control device is provided with a control module which is electrically connected with the electronic lock of each mobile phone storage module, and opening and closing of the cabin door of each mobile phone storage module arecontrolled through the control module. The shielding cabinet is provided with the multiple mobile phone storage modules, each mobile phone storage module is provided with the storage cabin body with good sealing performance, the cabin door is locked in the storage cabin body through the electronic lock, the whole storage space is tightly sealed, no gap exists, mobile phone signals can be shieldedto the maximum extent, the structure is compact and tight, and the shielding effect is good. The access function of each storage module is uniformly controlled through the function control device, andthe cabinet is convenient to use, intelligent, quick, safer and more reliable.