14results about How to "Guaranteed shielding effect" patented technology

This invention discloses a filtering device suitable for mobile phone shielding, comprising a connector, a tube, a first conductive element, a second conductive element, and a tubular ceramic capacitor. The connector includes a metal housing and a conductive core disposed within it. The tube is also made of metal, with its front end connected to the rear end of the connector housing. The first conductive element passes through the tube axially from within it, without contacting the tube. The front end of the first conductive element is connected to the conductive core of the connector. The second conductive element is disposed outside the tube, with its front end connected to the connector housing. The tubular ceramic capacitors are connected in series with the first conductive element, with at least one of them sealing the rear end of the tube. The casing of the tubular ceramic capacitor includes a conductive portion connected to the tube. Compared with existing technologies, this filtering device not only performs better in high-frequency filtering and electromagnetic shielding, but its structural design is also simpler and more practical.

The utility model relates to the technical field of control cables, in particular to an environment-friendly high-flame-retardant shielding control cable for special instruments, which comprises a plurality of mutually twisted control wire cores. The plurality of flame-retardant filling strips are filled in gaps among the control wire cores and are wrapped and fixed by a flame-retardant belt to form a cable core with a circular cross section; the outer wall of the cable core is coated with the composite shielding layer; and the outer sheath is extruded on the outer wall of the composite shielding layer. Through the combination of the copper strip shielding layer and the copper wire shielding layer in the composite shielding layer, respective advantages can be exerted on different frequency bands, a comprehensive shielding effect is provided, meanwhile, the elastic deformation space is increased by utilizing the convex structure of the copper strip, the overall flexibility of the cable is high, wiring in frequent bending and narrow space is facilitated, and the cable has a wide application prospect. And meanwhile, the aramid fiber braid layer is utilized to buffer and protect the copper wire braid layer, so that the probability that the copper wires are broken under the action of compression / tensile stress of the cable can be reduced, and the shielding performance of the cable is maintained.

The application discloses a preparation method of superfine denier electromagnetic shielding functional chinlon and a product thereof. The chinlon is prepared by mixing 2-7% electromagnetic shielding functional chinlon master batch containing Fe3O4 nanoparticles and 93-98% pure chinlon chips, and then performing drying, melt extrusion, spinning cooling, oiling treatment, drafting setting and winding silk collection. In the preparation process, key parameters such as spinning temperature, filter mesh size, cooling parameter and drafting multiple are optimized, so that the problems of superfine denier fiber spinning breakage, product adhesion and uneven dispersion under high master batch content are solved. The chinlon monofilament fineness obtained by the application is 0.2-0.5 dtex, the breaking strength is greater than or equal to 3.0 cN / dtex, the electromagnetic shielding effectiveness reaches 40 dB in a frequency range of 2000 MHz, the thermal stability is better than that of pure chinlon, and the application is suitable for high-end application scenes such as high-grade clothes, home textiles, electronic protection and filtering materials.

The utility model discloses a conductive wire mesh based on a non-metal base material, which belongs to the technical field of conductive materials and comprises a wire mesh structure formed by weaving non-metal wires, the non-metal wires are made of carbon fibers, and a conductive layer is arranged on the surface of the wire mesh structure. According to the conductive wire mesh based on the non-metal base material provided by the utility model, the carbon fiber wire mesh structure is compounded with the conductive layer, so that the conductive wire mesh has the advantages that the surface is smoother and not easy to deform while excellent conductivity and electromagnetic shielding performance are obtained.

The application relates to the technical field of residual magnetism detection, and particularly relates to an array type magnetic flux gate arrangement tool which is arranged in a cylindrical magnetic shielding cylinder and comprises a base, a guide rail and a residual magnetism detection component. The base is arranged in the magnetic shielding cylinder and is in contact with the inner wall of the magnetic shielding cylinder, is used for bearing the tool, has two contact parts which are in close contact with the inner wall of the magnetic shielding cylinder, and a main body part is arranged between the two contact parts. The guide rail is arranged on the base and is fixedly connected with the base. The residual magnetism detection component is arranged on the guide rail and cooperates with the guide rail, a plurality of magnetic flux gates are arranged on the residual magnetism detection component, and the residual magnetism of a material to be detected is detected. The application provides a magnetic flux gate arrangement tool which is specially arranged in the magnetic shielding cylinder, the position of a plurality of magnetic flux gates can be synchronously adjusted, the consistency of the positions of the magnetic flux gates before and after adjustment is ensured, and the residual magnetism gradient of the material to be detected can be conveniently detected.

The application discloses a wide-band FSIW-like dual-band filter, which comprises a top metal layer, a middle metal layer, a bottom metal layer, a dielectric layer, a first array of metallized through holes, a second array of metallized through holes, a third array of metallized through holes and an input / output port. The first and second modes of the FSIW-like rectangular cavity are used to construct the first and second passbands of the filter respectively. The width of the rectangular gap at the folding position of the FSIW-like rectangular cavity is changed, so that the resonant frequency of the second mode can be adjusted, and the resonant frequencies of the first and third modes are not changed, thereby effectively improving the stopband bandwidth of the dual-band filter while the frequency of the second passband is independently adjustable.

This invention discloses a method for preparing a high-density patch inductor blank, relating to the field of patch power inductors. In the prefabrication process, the patch inductor blank undergoes a first-stage pressing and a second-stage pressing. During the first-stage pressing, the current positions of the upper die head and the second lower die head are kept constant. The first lower die head is activated and controlled to press upwards at a first preset pressure. When the powder height on the periphery of the cavity is higher than a preset dimension of powder height at the center of the cavity, the second-stage pressing begins. During the second-stage pressing, the first lower die head continues to press at the first preset pressure, while the upper die head and the second lower die head are activated and controlled to press downwards and upwards respectively at a second preset pressure. When the powder height on the periphery of the cavity is equal to the powder height at the center of the cavity, the pressing pressure of the first lower die head is adjusted to the second preset pressure and held, resulting in a patch inductor blank. This method significantly improves the compaction density and permeability of the inductor blank.

The utility model discloses a high-shielding control cable, which comprises a conductor wire core, and the conductor wire core comprises a wire core body, an inner semi-conductive shielding layer, an insulating layer, an outer semi-conductive shielding layer and a cable protection layer. The outer side of the keel is provided with a conductor wire core, the outer side of the filler is wound with a wrapping tape, the outer side of the shielding layer is provided with a rubber sleeve layer, and the outer side of the inner protection layer is provided with a steel wire armor. According to the high-shielding control cable, the conductor wire core is composed of the wire core body, the inner semi-conductive shielding layer, the insulating layer, the outer semi-conductive shielding layer and the cable protection layer, the shielding effect of the conductor wire core is improved, the conductor wire core monomers can be conveniently fixed, the shielding layer can be conveniently used, and the shielding layer can be conveniently protected through the rubber sleeve layer outside the shielding layer; therefore, the shielding effect of the control cable is ensured, the steel wire armoring outside the inner protective layer enhances the compressive strength of the control cable, the control cable is convenient to use, and the outer protective layer is convenient to protect the steel wire armoring.

An imaging device provided by the utility model comprises a detector module, a shielding structure and a cooling structure used for transmitting a refrigerant to the detector module, the shielding structure comprises a shielding inner cylinder, a shielding outer cylinder and two shielding rings, and the detector module is arranged between the shielding inner cylinder and the shielding outer cylinder. The shielding ring is connected with the end part of the shielding inner cylinder and the end part of the shielding outer cylinder, and the cooling structure is used for cooling the detector module. According to the imaging equipment provided by the utility model, the cooling structure is used for cooling the detector module and rapidly taking out heat generated by electronic devices in the imaging equipment, so that the temperature of the imaging equipment is stable, the imaging performance is stable, the service life of the imaging equipment can be prolonged, and holes are not required to be formed in the surface of the imaging equipment in a larger area for air-cooled heat dissipation; and the shielding performance of the imaging equipment is effectively ensured.

The utility model discloses a shielding sleeve for a radio frequency connector, which belongs to the technical field of radio frequency connectors and comprises a connector body, one end of the connector body is clamped with a transmission line, the outer surface of the transmission line is rotatably connected with a sleeve body, the outer surface of the sleeve body is fixedly connected with a turntable, a limiting groove is arranged in the connector body, and the turntable is fixedly connected with the limiting groove. The outer surface of the sleeve body is fixedly connected with a limiting block, and an L-shaped plate is fixedly connected outside the connector body. According to the utility model, through the arrangement of the sleeve body, the rotating disc, the L-shaped plate, the connecting plate, the bolt and the nut, the shielding sleeve enables a transmission line to realize a rapid assembly function through the sleeve body and the connector body through the cooperation of the L-shaped plate, the bolt and the nut, thereby avoiding the loosening phenomenon in severe environments such as vibration, impact and the like; the shielding effect and the signal transmission quality are guaranteed, and the transmission line is convenient to disassemble and assemble subsequently, so that the subsequent maintenance cost and difficulty are reduced.

The utility model relates to the technical field of offshore photovoltaic panel connection cables, and discloses a special cable for offshore photovoltaic panel connection, which comprises a cable sheath, the cable sheath comprises a corrosion-resistant coating, a corrosion-resistant layer and a main body layer, and the corrosion-resistant coating is positioned on the outer surface of the corrosion-resistant layer. According to the utility model, the cable sheath can be fixed and limited through the arrangement of the fixing assembly, the cable sheath is composed of the corrosion-resistant coating, the corrosion-resistant layer and the main body layer, the strength of the cable sheath is ensured, the corrosion-resistant layer has good corrosion resistance and can resist seawater corrosion, the corrosion-resistant coating increases the corrosion resistance of the outside of the corrosion-resistant layer, and the service life of the cable sheath is prolonged. The main body layer ensures the characteristics of the cable sheath, the shielding layer, the loose tube and the heat-resistant layer are adopted to form the cable core protective sheath, the shielding property and the heat insulation property of the cable core protective sheath are ensured, certain pulling resistance is increased, and the pulling resistance core and the pulling resistance net are adopted to form the pulling resistance wire, so that the pulling resistance of the pulling resistance wire is greatly improved.

This invention discloses a semiconductor device, a fabrication method, a power module, a conversion circuit, and a vehicle. The semiconductor device includes: a semiconductor body comprising a well region and a first region; the first region being configured with a first conductivity type and located on a first surface, and the well region being configured with a second conductivity type and located on the side of the first region away from the first surface; the first surface having at least two trenches arranged at intervals; and at least one third region and at least one fourth region, both of the second conductivity type, and respectively located on the side of different trenches near the second surface; the distance from the third region to its corresponding trench is greater than the distance from the fourth region to its corresponding trench, and the distance between the third region and the fourth region is greater than zero; a gate located in a trench; a source located on the first surface; and a drain located on the second surface. The technical solution provided by this invention maintains low on-resistance and high cell density while suppressing electric field concentration at the bottom of the trench and reducing Miller capacitance.

The utility model belongs to shielding case technical field, concretely relates to a new energy automobile sensor shielding case, including the cover body of integrated structure, elastic buckle and support leg, material selection chooses white copper or tinplate, is made through blanking, bending process, has nickel on the surface electroplating, on the basis of nickel plating layer, electroplating has a layer of bright tin again, the side of cover body is equipped with the reserved hole, the part of cover body connection is shaped to have dovetail block, forms the dovetail groove between every two dovetail blocks, the dovetail block of cover body both ends is alternately distributed, and the elastic buckle is used for reinforcing sensor and cover body fixed strength, is located in the reserved hole, the support leg is L type, and the length end of a section is vertically arranged with cover body, the other section is parallel with cover body, and the lower end of the section of support leg parallel with cover body is equipped with the protruding part, and the vertical mounting hole is equipped in the support leg middle. Through the setting of above-mentioned component, not only shielding case shielding effect is good, and makes the installation fixed effect of shielding case and sensor good while the convenience of dismounting improves, reduces production cost simultaneously.

The application relates to the technical field of cables, in particular to a high-flexibility cable for robots and a preparation method thereof, which comprises a cable core, the cable core comprises a gear shaft, a gear ring, a gear set and a protective layer; the gear set comprises a plurality of signal wire core unit groups; the gear ring comprises a plurality of control wire cores and a reinforcing core which is distributed in the middle and is equally divided into three parts; the gear shaft comprises a rhombic support bracket, a main wire core which is distributed around the rhombic support bracket in a ring shape, and a disturbance layer; the two sides of the gear ring are in a ring interlocking mode with the gear shaft and the gear set and do not interfere with each other; the surfaces of the rhombic support bracket, the gear shaft, the gear ring and the gear set are uniformly coated with a release film; and the protective layer is formed by using a mutual fusion extrusion process. The signal wire core and the control wire core, the main wire core do not contact each other, the ring interlocking structure of the gear shaft, the gear ring and the gear set makes the cable have high flexibility, anti-torsion and bending fatigue resistance, and the cable also has excellent oil stain resistance, aging resistance and good heat dissipation performance, thereby providing a solid guarantee for stable operation of the robot.