11results about How to "Play a shielding role" patented technology

The invention discloses a high-temperature-resistant heat-proof coating material and a preparation method thereof, and aims to solve the problems that the existing organic heat-proof coating material is poor in shape maintaining property and insufficient in mechanical strength at high temperature. The coating material disclosed by the invention is prepared from the following raw materials in parts by mass: 0.5 to 5 parts of octa-aminopropyl polyhedral oligomeric silsesquioxane, 80 to 120 parts of hydroxyl-terminated polymethylphenylsiloxane, 3 to 12 parts of curing agent, 0.1 to 5 parts of catalyst, 20 to 80 parts of low-temperature bonding glass material and 20 to 80 parts of high-temperature melt eutectic mineral aggregate. By increasing the rigidity of the matrix resin and combining the characteristics of the low-temperature bonding glass material and the high-temperature melting eutectic mineral material, the organosilicone heat-proof coating capable of being vitrified at high temperature is prepared, and then the shape maintaining property and the mechanical property of the protective material in a wide temperature range are improved.

The invention discloses a novel energy wireless transmission device and method based on electric field coupling, and aims to solve the problems that an existing parallel coupling mechanism has relatively serious electric field dissipation and a stacked coupling mechanism is insufficient in power transmission capability. The energy transmitting assembly and the energy receiving assembly are of an oppositely-embedded disc structure, a double-LC type resonance compensation network is adopted, and constant current output irrelevant to a load can be achieved. Compared with a parallel disc coupling mechanism, the electric field dissipation of the system to the external environment can be effectively reduced; compared with a stacked disc coupling mechanism, the power transmission capability of the coupling mechanism can be ensured. The power supply slip ring adopting the electric field coupling type wireless power transmission technology is high in electromagnetic interference resistance, small in size, light in weight and low in cost, the problems of abrasion and abrasive dust in power supply of a rotary slip ring are fundamentally solved, and meanwhile the cost and the weight of a power supply device are reduced. The invention relates to the field of wireless power transmission.

The present application relates to the technical field of connector, especially to an electric connector assembly. The electric connector assembly comprises a shell, a PCB adapter plate is arranged in the shell, two or more rows of non-ground cables are electrically and fixedly connected to the PCB adapter plate, two or more rows of connecting pads are arranged on the front and back surfaces of the PCB adapter plate respectively, each row of connecting pads comprises a row of signal pads and ground pads, the core wire of the non-ground cable is electrically and fixedly connected to the signal pad on the front surface, the conductive outer sheath is electrically connected to the ground pad on the front surface, the signal pad and the ground pad on the back surface are used for being electrically connected to the corresponding terminals of a PCB female plate or being electrically connected to the corresponding terminals of an adapter socket and then being electrically connected to the PCB female plate, the PCB adapter plate is internally arranged with a conductive circuit to correspondingly connect the connecting pads on the front and back surfaces of the PCB adapter plate, and the electric connector assembly further comprises a load bottom support which is locked and connected to the shell. The electric connector assembly can realize multi-row high-density wiring and greatly improve the performance of the connector.

The invention discloses a scooter ceiling and a scooter, and relates to the technical field of scooters. The shielding problem is solved. The scooter shed comprises a shed body, a front windshield is fixed to the front side of the shed body, doors are arranged on the two sides of the shed body in a rotating fit mode, glass windows are fixedly connected to the inner walls of the doors in an embedded mode, a photovoltaic panel is connected to the top of the shed body through a flexible plug ring, the scooter comprises a chassis, and a steering wheel and a scooter platform are fixed to the tops of the front side and the rear side of the chassis respectively. A walking mechanism is arranged at the bottom of the chassis; the top of the center console is provided with a storage groove and a steering wheel, and the top of the vehicle platform is connected with a vehicle seat through a damping type connecting mechanism. By arranging the shed body, the front windshield, the door and other structures, the whole ceiling can be closed, the shielding effect can be achieved, meanwhile, the electric telescopic rods are arranged and can open the photovoltaic panels in different directions and angles, a skylight structure is formed, and ventilation is facilitated.

The utility model relates to the technical field of access control, and provides access control equipment which comprises a shell, a functional device, a transparent cover plate and a control mainboard, the functional device is arranged on the shell; the transparent cover plate is mounted on the shell; an electrochromic film is arranged on one side, facing the shell, of the transparent cover plate; the electrochromic film is divided into a first color changing area and a second color changing area, the first color changing area is arranged corresponding to at least part of the functional devices, and the second color changing area is arranged corresponding to areas except the functional devices. According to the access control equipment disclosed by the utility model, the electrochromic film is arranged on the transparent cover plate, and the color and transparency of the second color-changing area of the electrochromic film can be changed into a black light-proof state under the control of the control mainboard, so that the shell is shielded, black ink does not need to be printed on the inner side of the cover plate in a silk-screen manner, and the cover plate is not easy to fall off; and the first color changing area can be changed into a transparent state, so that the functional device can realize own functions.

The utility model relates to the technical field of mobile power supply, concretely relates to a mobile power supply. Mobile power supply includes casing, data line, charging interface and main control circuit board, charging interface and data line are installed in casing one end, and main control circuit board is installed in casing and is located in the one end close to charging interface and data line. Main control circuit board includes AC component region and DC component region, and AC component region is installed with AC component, and DC component region is installed with DC component, is provided with the isolation board on main control circuit board, and the isolation board isolates AC component region and DC component region. The isolation board can play the shielding effect, and the magnetic field produced by AC component and its circuit is blocked to the influence of DC component and its circuit, thereby guaranteeing that the direct current output by DC component and its circuit is more stable, reduces the bad influence to other components using direct current in mobile power supply, such as avoiding electronic equipment signal transmission error, performance instability and so on.

The utility model relates to an asphalt mixing pot and belongs to the technical field of asphalt mixing, a protective plate is fixed to the lower end of a pot body, a telescopic plate is slidably connected to the outer surface of the protective plate, sliding blocks are fixed to the periphery of the top end of the inner side of the telescopic plate, and connecting bins are arranged at the front end and the rear end of the telescopic plate; sliding grooves are formed in the periphery of the outer surface of the protection plate, a controller is fixed to the front end of the connecting bin at the front end, and limiting assemblies are arranged in the two connecting bins. The limiting assembly comprises two sets of clamping blocks, two sets of vertical blocks, friction pads fixedly installed at the opposite ends of the front set of clamping blocks and the rear set of clamping blocks, and fixed connecting plates fixedly installed on the outer surfaces of the two clamping blocks in the same set. According to the asphalt mixing pot, through the telescopic plate and the limiting assembly, the length of the protection plate can be increased, so that the telescopic plate can shield discharged asphalt, the balance weight at the lower end of the protection cloth does not need to be replaced, the operation complexity during asphalt shielding can be effectively reduced, and the convenience during asphalt shielding operation can be improved.

This utility model discloses a battery box and a battery pack. The box includes a shell, which includes a first base and an extension. The first base forms a receiving cavity and a first opening that are interconnected. The receiving cavity is used to receive battery cells. A first sealing member is used to seal the first opening and is disposed around at least a portion of the first opening. A first cover is disposed on the first opening. The first sealing member is sandwiched between the first base and the first cover. The extension protrudes from the first base or the first cover and surrounds at least a portion of the first opening, covering the first sealing member. This utility model aims to solve the technical problem of how to improve the sealing performance of the battery box.

The utility model relates to the technical field of cables, in particular to a halogen-free wear-resistant torsion-resistant high-strength winding cable, which comprises a winding protection layer, a wear-resistant mechanism arranged in the winding protection layer, a torsion-resistant mechanism arranged on the inner side of the wear-resistant mechanism, and a protection mechanism arranged in the torsion-resistant mechanism. The wear-resisting mechanism comprises a first wear-resisting layer arranged on the inner side of the winding protection layer, a second wear-resisting layer is arranged on the inner side of the first wear-resisting layer, an anti-tearing layer is arranged on the inner side of the second wear-resisting layer, and a reinforcing layer is arranged on the inner side of the anti-tearing layer. High-strength aramid yarn is added into the first aramid yarn conductor and the second aramid yarn conductor to enhance the strength of the conductors, fluoroplastic with excellent performance is selected as the torsion-resistant insulating layer and the wear-resistant insulating layer, halogen-free polyurethane is used as the cable sheath, the service life of the cable can be greatly prolonged, the reinforced shielding layer is formed by mixing and weaving thin steel wires and copper wires, and the service life of the cable can be greatly prolonged. The braided structure can play a shielding role, shield other interference current, and improve the anti-pressure capability of the cable.

The utility model discloses a waterproof cable with a shielding function, which comprises a cable core, a PVC (polyvinyl chloride) inner protection layer, a scratch-resistant wear-resistant layer and a rubber outer protection layer, the PVC inner protection layer and the scratch-resistant wear-resistant layer are arranged on the outer side of the cable core, the scratch-resistant wear-resistant layer is arranged on the outer side of a polyvinyl chloride insulation layer, and the rubber outer protection layer is arranged on the outer side of a rubber ring belt. Buffer cavities are formed in the middle of the rubber outer protection layer at equal angles. According to the waterproof cable with the shielding function, through the arrangement of the PVC inner protection layer and the scratch-resistant wear-resistant layer, the cable can be well protected, the wear resistance and scratch resistance of the cable are improved, through the arrangement of the non-woven fabric damp-proof layer, the movable damp-proof and waterproof effects can be achieved, and through the combination of the arrangement of the metal shielding net, the shielding effect is good. According to the cable, the shielding layer is arranged, external signals can be shielded, the stability of signal transmission is guaranteed, and a good buffering effect can be achieved when the cable is extruded by external force in combination with the arrangement of the rubber outer protection layer and the buffering cavity.

The utility model discloses a 46.5 MHz small-size band-pass filter, which comprises a metal shell and a PCB (printed circuit board) covering the opening end of the shell, components of the band-pass filter are arranged on the surface, facing the inner cavity of the shell, of the PCB, an input end is arranged on the upper left side of the PCB, an output end is arranged on the lower right side of the PCB, and a left notch and a right notch are arranged at the positions, opposite to the input end and the output end, of the shell. The left notch and the right notch are respectively kept a certain distance away from the pads at the input end and the output end, two clamping pieces which are staggered left and right are arranged on the front side wall and the rear side wall of the shell, the two clamping pieces are inserted into through holes in the PCB and then are welded and fixed, and the shell is filled with sealant. According to the utility model, the metal shell is adopted to play a shielding role and a protection role; a gap is arranged to avoid short circuit between the metal shell and the bonding pad; the clamping piece is arranged, so that the connection reliability of the shell and the PCB can be ensured; and the filled sealant is thick, so that fixation and elastic buffering of internal components can be realized, and the connection reliability is higher.