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143results about How to "Thin" patented technology

Heat-conducting and heat-dissipating film containing graphene

The invention relates to the technical field of a heat-conducting and heat-dissipating material, in particular to a heat-conducting and heat-dissipating film containing graphene. The heat-conducting and heat-dissipating film containing graphene comprises a heat-dissipating film body, wherein the heat-dissipating film body comprises a graphene composite film layer, the graphene composite film layer is formed by compositing a graphene layer and a base material through a bonding layer, the thickness of the graphene layer is in a range of 0.001-50.0 mu m, the purity of a graphene layer is in a range of 99.5%-99.99%, and a first adhesive layer and a second adhesive layer are arranged on the bottom surface and the top surface of the graphene composite film layer respectively. Compared with the prior art, the heat-conducting and heat-dissipating film containing graphene has the beneficial effects as follows: the heat-dissipating film body comprises the graphene composite film layer, the graphene composite film layer is formed by compositing the graphene layer and the base material through the bonding layer, and the heat-conducting and heat-dissipating film containing graphene has toughness, can be produced automatically and continuously, can be stored in a rolled manner, is convenient to use and good in heat-conducting and heat-dissipating effect, is fixed through bonding, and can be widely applied to heat conduction and heat dissipation of devices such as a laptop, a mobile phone, a television, a camera, an LED lamp, an automobile cooling fin and the like.
Owner:SHENZHEN LAIBIDE TECH CO LTD

Lens and method for generating Bessel beam carrying orbital angular momentum based on super surface

The invention discloses a lens and a method for generating Bessel beam carrying orbital angular momentum based on a super surface, relates to a technology for generating the Bessel beam carrying the orbital angular momentum and solves the problems of high processing precision requirement, low energy utilization rate and poor integration effect of the conventional method for generating the Bessel beam. The lens comprises m*n phase mutation units which are periodically arranged, wherein each phase mutation unit comprises a substrate and a metal layer located on the surface of the substrate; the metal layer comprises two parts, wherein one part is a square metal layer arranged at the center of the substrate and the other part is a rectangular metal frame surrounding the square metal layer; a notch is arranged at the center of each of one group of opposite sides of the metal frame; one side of the substrate is taken as an x axis, an inclined angle between the connecting line of the center of the notch and the center of the substrate and the forward direction of the x axis is theta, (formula), circular polarized wave is vertically incident, and the transmission cross polarization wave is the Bessel beam carrying the orbital angular momentum. The lens and the method are suitable for generating the Bessel beam carrying the orbital angular momentum.
Owner:HARBIN INST OF TECH

Interactive intelligent tablet

The invention discloses an interactive intelligent tablet. The interactive intelligent tablet comprises an aluminum-plastic backboard, a heat dissipation plate, a middle bezel component, an outer bezel component, a backlight module and a control unit, wherein the heat dissipation plate comprises a first plate body and a second plate body; the second plate body is located on the front side of the first plate body; the upper part of the second plate body is connected with the lower part of the first plate body; a light source mounting plate which extends to the front side is arranged at the lower end of the second plate body; the lower part of the aluminum-plastic backboard is mounted on a mounting surface formed by the front side surface of the first plate body and the upper end surface of the second plate body in a clinging manner; the front side surface of the aluminum-plastic backboard and the front side surface of the second plate body form a bearing basic surface for bearing the backlight module; and the back side surface of the aluminum-plastic backboard and the back side surface of the heat dissipation plate form a mounting basic surface for mounting the control unit. The interactive intelligent tablet is relatively small in thickness, relatively light in weight, good in heat dissipation effect and high in structural strength.
Owner:GUANGZHOU SHIYUAN ELECTRONICS CO LTD +1

Pre-pressure device of magnetic force pressure enforcement and micro face ultrasonic electromotor based on this device

The invention discloses a pre-pressure device for magnetic pressure and a miniature in-plane ultrasonic motor using the device, which relates to the field of ultrasonic motors. The invention solves the shortcomings of the existing ultrasonic motors, which are large in radial direction, thick in axial direction and complex pre-pressure device. The pre-pressure device of magnetic force pressurization of the present invention adopts magnetic steel, and magnetic steel is circular sheet, and it fixes the stator bottom; Piezoelectric elements are respectively fixed on the eight edges of the metal base. The rotor is a conical frustum of magnetically conductive material. Gears are arranged on the edge of its upper bottom surface. The side wall of the rotor is lapped on the inner edge of the metal base of the stator. The magnetic force The magnetic attraction between the pressurized pre-compression device and the rotor provides the required pre-compression between the stator and the rotor. The invention has the advantages of thin thickness, simple pre-pressure device, miniaturization of the whole machine, easy processing of piezoelectric ceramics, low cost and good controllability, and is suitable for special occasions of thinning and miniaturization.
Owner:HARBIN INST OF TECH

Focus solar temperature difference generating device

The invention discloses a focus solar temperature difference generating device, comprising a Fresnel focus lens, concentrators, a semiconductor temperature difference generating plate, water cooling systems and a support, wherein the Fresnel focus lens is fixed on the support, the semiconductor temperature difference generating plate is arranged on a light path of the Fresnel focus lens, the upper surface and the lower surface of the semiconductor temperature difference generating plate are respectively adhered with the concentrators and the water cooling systems, sunlight is incident to the Fresnel focus lens, is converged by the Fresnel focus lens and then is focused onto the concentrator, the concentrator converts light energy absorbed from the sunlight into heat energy, a high temperature terminal is formed on the upper surface of the semiconductor temperature difference generating plate, the water cooling systems form a low temperature terminal on the lower surface of the semiconductor temperature different generating plate, and electric energy can be obtained by virtue of temperature difference formed by the upper surface and the lower surface of the semiconductor temperature difference generating plate. The generating device can overcome the defect that solar energy density is low, a semiconductor temperature difference generating module is applied to the field of solar generating, and the generating device disclosed by the invention has simple system structure, high efficiency, low cost and strong practicability.
Owner:HUAZHONG UNIV OF SCI & TECH

Multilayer composite grid sound barrier and application of multilayer composite grid sound barrier

The invention provides a multilayer composite grid sound barrier. The multilayer composite grid sound barrier is of a multilayer composite three-dimensional structure, and comprises surface layers, a plurality of middle sound isolation layers and light-weight sandwich layers, wherein the surface layers are positioned on the surfaces of the two sides of the multilayer composite grid sound barrier; the middle sound isolation layers are positioned between the two surface layers; the light-weight sandwich layers are positioned between the surface layers and the middle sound isolation layers and between the middle sound isolation layers and fill gaps; the surface layers and the middle sound isolation layers are made of sound isolation materials or composite sound isolation materials; the light-weight sandwich layers are made of sound absorption material. The sound barrier also comprises keels; the keels are positioned between the surface layers and the middle sound isolation layers, connect the surface layers and the middle sound isolation layers and connect the middle sound isolation layers to form a three-dimensional grid structure; and the keels positioned at the two sides of the each middle sound isolation layer are not overlapped with the extension lines of the keels arranged at the other side of the middle sound isolation layer. The multilayer composite grid sound barrier has excellent sound isolation performance; meanwhile, good heat insulation performance is realized; the structure is firm, simple and reasonable; the weight is light; the thickness is small; the installation is convenient; the production and manufacturing process is simple; and the cost is low. The invention also provides application of the multilayer composite grid sound barrier.
Owner:北京谐声昊普声学技术有限公司

Silicone rubber composite rubber tube lined with polytetrafluoroethylene and manufacturing method thereof

The invention provides a silicone rubber composite rubber tube lined with polytetrafluoroethylene, comprising a polytetrafluoroethylene lining tube, a first silicone rubber layer, a reinforced layer and a second silicone rubber layer from inside to outside in sequence. The silicone rubber composite plastic tube solves the problems of low performance of the silicone rubber in oil resistance and solvent resistance, and greatly increases the use range of the silicone rubber tube. Additionally, the invention also provides a manufacturing method of the silicone rubber composite rubber tube, which improves the bonding property of the polytetrafluoroethylene lining tube with the silicone rubber by three methods, and comprises steps of: (1) performing plasma treatment to a polytetrafluoroethylene film belt; (2) tightly winding a layer of glass cloth on the outer surface of the polytetrafluoroethylene film belt after the polytetrafluoroethylene film belt is wound on a mould core so as to make the surface of the polytetrafluoroethylene film belt acquire the same textures to increase the surface area; (3) performing sodium-naphthalene-tetrahydrofuran solution to the outer surface of the shaped polytetrafluoroethylene lining tube to improve the surface polarity and the surface tension of the tube.
Owner:XIAMEN CHUANGXINYUAN RUBBER PROD

Solder-resisting photosensitive resin composition, printed wiring board and preparation technology of printed wiring board

The invention discloses a solder-resisting photosensitive resin composition, a printed wiring board using a solder-resisting photosensitive dry film, prepared from the solder-resisting photosensitive resin composition, as a solder mask, and a preparation technology of the printed wiring board. The solder-resisting photosensitive resin composition comprises the following components: 11-13 wt% of a binder, 29-32 wt% of epoxy resin, 11-14 wt% of monomer, 12-14 wt% of a photoinitiator, 25-29 wt% of an additive and 3.5-4.5 wt% of dye. The solder-resisting photosensitive dry film prepared from the solder-resisting photosensitive resin composition disclosed by the invention has the following advantages: (1) the mechanical property is excellent: the dry film is thinner and higher in strength and has excellent heat shock resistance; (2) the curing speed is high: the photosensitive dry film requires short time of exposure, can particularly ensure the manufacturing accuracy of the printed wiring board, and is applicable to manufacture of high-density wired circuit boards; (3) the photosensitive dry film is attached to the printed wiring board through the function of pressure and temperature and adopts a specific manufacturing technology, and no bubble exists between the solder mask and the circuit board.
Owner:河北盈丰电子科技有限公司

High-power LED illumination lamp metal radiator and manufacturing method

The invention relates to a high-power light emitting diode (LED) illumination lamp metal radiator and a manufacturing method. The radiator comprises a radiating shaft and radiating fins, wherein the radiating shaft is of a cylinder, the circle center of the cylinder is provided with a through hole, two end faces of the radiating shaft are correspondingly provided with positioning holes communicated at two ends, the circumferential surface of the radiating shaft is uniformly provided with a plurality of U-shaped insert slots and V-shaped pressing plate slots in the same number as the U-shaped insert slots, and the U-shaped insert slots and the V-shaped pressing plate slots are formed at intervals; the radiating fins are rectangular sheets, two angles at the upper ends of the radiating fins are symmetrical arc angles, and the surfaces of the radiating fins are provided with a plurality of rectangular reinforcing slots and a plurality of radiating holes; and the right-angled sides of a plurality of radiating fins are extruded into the plurality of U-shaped insert slots on the radiating shaft respectively. The radiator has the advantages that the radiating efficiency is improved, the weight and the volume are reduced and the consumption of raw materials is reduced. The radiator can directly replace the conventional incandescent lamp or energy-saving lamp, so the application range of the radiator is enlarged, the application of an LED illumination lamp is more convenient and the application range is wider.
Owner:TIANJIN ZHONGHUAN JINGRUI ELECTRONICS

Folding type baby crib guardrail

The invention relates to the technical field of baby products, in particular to a folding type baby crib guardrail. The folding type baby crib guardrail comprises two folding and expansion side frames capable of expanding in a longitudinal direction and being folded in a vertical direction, wherein the bottoms of the folding and expansion side frames are connected with each other by two folding and expansion rod pieces to enclose a rectangular frame structure; each folding and expansion rod piece comprises a transverse folding rod and a transverse expansion rod; two ends of the transverse folding rod are respectively hinged with the bottom of one folding and expansion side frame and one end of the transverse expansion rod; the other end of the transverse expansion rod is hinged with the bottom of the other folding and expansion side frame; and the transverse expansion rod forms an expansion structure in such a way that at least two sections of transverse short connecting rods are sleeved with each other in sequence. The folding type baby crib guardrail provided by the invention has the advantages of easiness for folding and unfolding guardrail, convenience in use, no need of assembling and disassembling, capability of folding or expanding in transverse, longitudinal and vertical directions, small space occupied by the folded guardrail, convenience in packaging, transportation, use, collection and keeping.
Owner:陈瑞武

Scissor keyboard key structure

The invention provides a scissor keyboard key structure, which comprises a base, a thin film circuit board arranged on the base, an elastic piece arranged on the thin film circuit board, a scissor support arranged above the elastic piece and arranged on the base, and a key cap arranged on the scissor support, wherein the scissor support comprises an inner support and an outer support in rotary connection onto the outer side of the inner support; the inner support and the outer support form a dual-lever structure; one side, facing the elastic piece, of the inner support is provided with a convex part; the thin film circuit board is provided with a circuit contact; and the elastic piece is arranged on the circuit contact in a corresponding covering mode. When the key cap is pressed, the convex part of the scissor support presses the elastic piece, and the elastic piece presses the thin film circuit board to enable the circuit contact of the thin film circuit board to be contacted and conducted. According to the scissor keyboard key structure provided by the invention, the overall key is thinner, the stroke is larger, the hand feeling is better, the striking force at each position of the key cap is small and balanced in the case of use, the use is comfortable, the sound is small, and the structure is simple.
Owner:SHENZHEN DOKING TECH CO LTD
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