31results about How to "Fast rebound" patented technology

The invention relates to a thin keyboard on-off key group structure generating a press touch feel and rebounded rapidly. The thin keyboard on-off key group structure comprises a mechanical moving part and a switch control part, wherein the mechanical moving part comprises a key cap, a down-press and rapidly-rebounded mechanism; the down-press and rapidly-rebounded mechanism comprises a dual-connection rod, a balance rod and a double-arch elastic sheet, can give out a ringing press touch sound and has the characteristic of being rapidly rebounded after a key is loosen; the mechanical moving part also comprises the key cap, two dual-connection rods and the dual-arch elastic sheet or comprises the key cap, two balance rods and the dual-arch elastic sheet; the switch control part is used for controlling switch-on and switch-off of a key switching circuit and comprises a surface mounted infrared light emitting diode (IR), a surface mounted photoelectric receiving tube (PT), an optical element and a light blocking device for controlling switch-on and switch-off of a switch; and the switch control part can also be a traditional button-type switch control device or a rubber domical switch control device.

The invention discloses a flexible silica gel screen protection film, and belongs to the technical field of protection films. The flexible silica gel screen protection film mainly structurally comprises a PETrelease film, a hardened coating coated on the release surface of the PET release film, an organic silica gel layer coated on the hardened coating, an organic silicon pressure-sensitive adhesive layer coated on the organic silica gel layer, and a fluorine release film adhered on the organic silicon pressure-sensitive adhesive layer, wherein the hardened coating, the organic silica gel layer and the organic silicon pressure-sensitive adhesive layer are compounded into a use layer; the surface hardness of the use layer is HB-2H, the light transmittance is greater than or equal to 91%, the haze is less than or equal to 1%, and the softness is 25A-60A; and the thickness ratio of the hardened coating to the organic silica gel layer to the organic silicon pressure-sensitive adhesive layer in the use layer is (2-4): (40-50): (20-30). The flexible silica gel screen protection film has better flexibility and has more excellent fitting performance for curved edge amplitudes of an AF screen and a 2.5 D / 3D screen and is not degummed during die cutting and can be directly fit with a curved screen for use without hot-pressing preforming, and can play a better role in protecting existingcurved screen electronic equipment.

A portable baking oven has an upper portion and a lower portion that define a baking chamber are disclosed. A baking chamber opening may be defined entirely by the oven upper portion. The upper portion may pivot away from the lower portion to allow access to the interior of the oven for cleaning. The oven may include a gas-powered infrared bottom burner and a gas-powered curved back burner.

The invention relates to a die cutting device for conductive cloth indentation lines. The die cutting device is used for carrying out die cutting on indentation lines on a conductive cloth material strip, and comprises an upper die base and a lower die base which is arranged below the upper die base and matched with the upper die base. The lower surface of the upper die base is provided with an indentation line cutter, and the lower die base is provided with a silicone pad matched with the indentation line cutter and a material blocking mechanism matched with the conductive cloth material strip. Compared with the prior art, through arranging the silicone pad on the lower die base, the conductive cloth material strip and the indentation line cutter are supported flexibly from below, the indentation line cutter is ensured to be capable of being pressed into the conductive cloth material strip completely, so that the depth of the indentation lines is obvious, the compactness is good, therebound speed is slow, the imprint is not prone to recede and disappear, the retention is good, and the conductive cloth material strip can be effectively prevented from being lifted by the indentation line die cutter, thereby ensuring the normal proceeding of the continuous die cutting process.

The invention relates to polyurethane flame-retardant resilient foam. The polyurethane flame-retardant resilient foam has good resilience mechanical properties. The polyurethane flame-retardant resilient foam has uniform pores. A rolling experiment proves that compared with the traditional resilient foam, the polyurethane flame-retardant resilient foam has a longer service life and a faster rebound rate. The polyurethane flame-retardant resilient foam comprises 6-12 parts of silica nanopowder and overcomes the defect of no ultraviolet absorption component in the traditional resilient foam. When being used outside, the polyurethane flame-retardant resilient foam is not fast aged under UV. The polyurethane flame-retardant resilient foam saves a protective sleeve cost and widens a resilient foam application range.

The invention relates to a method using reinforcing ribs to enhance rebound force of an elastic cushion board, and the elastic cushion board; the elastic cushion board is uniformly provided with bosses; reinforcing ribs are uniformly arranged around the bosses on the board; the reinforcing rib is connected with the periphery of the boss on the board, thus forming a net structure elasticity enhance body; the net structure elasticity enhance body can enhance the elastic cushion board rebound force and anti-transverse horizontal deformation ability, and can prevent an iron cushion board to have lateral sliding; under a normal load effect, the elastic cushion board is in a basic bearing mode: stretching, shearing, deflection and proper amount of compression are integrated to provide the elastic force; under a large load or limit load effect, the elastic cushion board can automatically convert into an enhanced bearing mode from the basic bearing mode: the reinforcing rib bearing area gradually increases, and the cushion board vertical rigidity automatically increases in a non-linear manner. The elastic cushion board can prevent wearing damages caused by lateral sliding between a railway and the iron cushion board, and is widely applied to the rail transit system.

The invention discloses an elastic daub buffer of a subway vehicle. The damper comprises an outer piston rod assembly, an inner piston rod assembly, a cylinder cover assembly, a cylinder body and elastic cement gum, the outer piston rod assembly comprises an outer piston rod, an outer guide belt, a one-way valve steel ball, a positioning flat plug in threaded connection, an inner guide belt, a sealing piece, a positioning ring and an elastic check ring, the inner piston rod assembly comprises an inner piston rod, a guide belt, a one-way valve steel ball and a positioning flat plug in threadedconnection. The cylinder cover assembly comprises a cylinder cover, a static sealing piece, a dustproof ring, a sealing piece, a guide belt, a guide ring, an elastic check ring, a one-way valve steelball, a positioning flat plug in threaded connection, a reverse one-way valve steel ball and a set screw. By adopting an inner and outer double-piston-rod structure, a two-stage damping system, a double-sealing structure, a built-in sealing structure and the like which are alternately used under different impact speed working conditions, the shock absorber has the advantages of being stable in performance, good in sealing performance, low in initial impedance, good in restorability, long in service life and the like.

The invention discloses cowhide-imitated microfibre synthetic leather and a manufacturing method thereof. The manufacturing method comprises the following steps: (1) pasting a low-density polyethylene film on one surface of a non-woven fabric A by hot pressing, thus obtaining a non-woven fabric B covered with the film at a single side; (2) impregnating the non-woven fabric B with wet-process polyurethane resin slurry, then solidifying and washing with water, thus obtaining composite base cloth C; (3) drawing out the composite base cloth C obtained in step (2) in a decrement way, and meanwhile removing the low-density polyethylene film to obtain base cloth D, and oiling to obtain the cowhide-imitated microfibre synthetic leather. While the strong genuine leather feeling of microfibre leather is ensured, a good slow-springback effect is also achieved, creases are fine and smooth, the density of a product has obvious gradient change, and the product has good air permeability, moisture penetrability and watertightness; the warp / weft elongation error of the product is less than or equal to 20 percent, the overall elasticity is little, the size stability is excellent, and fatigue deformation difficultly occurs; compared with existing genuine leather-imitated microfibre leather, the cost is lowered by 5 percent to 15 percent.

The dust-proof conductive touch body includes a dust-proof handle, through which the dust infiltrated under the hammer is covered and blocked in a large area, which solves the weight error caused by the difference in the construction of the keys, which causes the learner's playing touch to appear Mistakes, as well as dust falling to the bottom and gradually accumulating during long-term use, resulting in fluctuations in the touch reflection time. The piano has always been poorly protected against dust on the touch body, and the internal dust cannot be dealt with, leading to the scrapping of the piano. After the dust enters the bottom of the keys, the dust-proof handle at the bottom of the keys blocks and closes the dust. Through the vibration of the keys, the scale-like dust removal sheet on the dust removal table is lifted, and the dust is vibrated out through multiple rapid vibrations to prevent dust from accumulating. Internally, the rebound speed is fast, and the conduction screw can enhance the bounce speed of the guide core, greatly speeding up the sounding time of the piano and improving the playing efficiency.

The invention relates to a production method of polyurethane flame-retardant highly-resilient foam. The polyurethane flame-retardant highly-resilient foam prepared by the method has better resilient mechanical properties, is even in gas holes. Rolling experiments prove that the polyurethane flame-retardant highly-resilient foam prepared by the method has a longer service life and a faster resilient speed compared with traditional resilient foam. The polyurethane flame-retardant highly-resilient foam prepared by the method also includes 6-12 parts of nano silica powder to make up for the defectthat the traditional resilient foam has no ultraviolet (UV) ray absorption component. When the polyurethane flame-retardant highly-resilient foam is used outdoors, the rapid UV aging can be avoided; the protective sleeve cost is also saved, and the use range of the polyurethane flame-retardant highly-resilient foam is more wide.

A rubber elastomer used for the expanding head of tube expander is prepared from fluorine rubber as base material, teflon powder, silicone, MoS2 powder, calcium hydroxide powder, magnesium oxide powder, zinc oxide powder, basic lead phosphite, and carbon black. Its advantages are uniform expansion force, less adrasion and long service life.

The invention belongs to the technical field of chain-link fence machines, and particularly relates to a single-needle machine of chain-link fences which comprises an underframe, a driving mechanism,a main transmission mechanism, a mesh knitting mechanism and a turnover plate mechanism; the mesh knitting mechanism is slidably connected to the underframe and can reciprocate relative to the underframe; the mesh knitting mechanism comprises a knitting frame, a plurality of positioning needles, a rotating shaft and a first auxiliary transmission mechanism, the plurality of positioning needles arefixed on a fixing bar fixed on the knitting frame, each positioning needle is connected with the rotating shaft through a rope, the rotating shaft is rotatably connected to the knitting frame and isconnected with the driving mechanism through the first auxiliary transmission mechanism, and the rotating shaft is driven to rotate; original collision type transmission of the positioning needles ischanged into rope transmission, so that noise is reduced, components can be protected to a great extent, and the service life of each positioning needle is prolonged; the rebound speed of the positioning needles is greatly also increased by adopting the rope transmission, and therefore, one positioning needle can be used for replacing the original two positioning needles.

The invention discloses a composite bow integrated double-main-string static force symmetrical balance hanging string pulley block system, and relates to the technical field of composite bow design, production and manufacturing and debugging detection. The composite bow integrated double-main-string static force symmetrical balance hanging string pulley block system comprises an overall assembly, wherein the overall assembly comprises a first pulley block and a second pulley block, and placing grooves are formed in the surfaces of the outer walls of the first pulley block and the second pulley block. According to the composite bow integrated double-main-string static force symmetrical balance hanging string pulley block system, hanging points of the first pulley block and the second pulley block are newly designed, so that only one integrated bowstring is used for being converted into two integrated bowstrings which are symmetrical left and right in a penetrating mode, so that distinguishing is not needed during production, manufacturing and assembling, and the cost is reduced; and one integrated bowstring is used, the structural layout of the two integrated bowstrings is achieved, the limitation of the left-right and deflection freedom degrees of the integrated bowstring is achieved, and the same tensioning degree of the two integrated bowstrings can be achieved without using an additional floating balance block, so that the problems of shooting precision caused by the freedom degree of the integrated bowstring, the number of the integrated bowstring, the manufacturing cost of the floating balance block and the assembling and debugging difficulty are solved.

An anti-radiation aerogel felt comprises a textile layer, a mixed layer and an aerogel layer, the mixed layer is composed of an upper layer and a lower layer, the aerogel layer is wrapped between theupper layer and the lower layer, the textile layer is arranged outside the mixed layer, the textile layer, the mixed layer and the aerogel layer are formed in a composite mode through a composite process, and the mixed layer is formed by weaving a plurality of bamboo fiber strips in a crossed mode. The gaps between the bamboo fiber board layers are filled with fine graphite blocks, the thickness of the graphite blocks is the same as that of the bamboo fiber board layers, and the graphite blocks and the bamboo fiber board layers are bonded and fixed through glue to form a mixed board layer. Thematerial provided by the invention can play a role in protecting similar fast neutron rays. The anti-radiation aerogel felt can be applied to heat insulation of equipment with a radioactive medium, the total amount of radioactive rays entering the surrounding environment can be greatly reduced while heat preservation is achieved, and the anti-radiation aerogel felt plays a very positive role in industrial radiation protection safety and personnel health.

The invention discloses a lever arm supporting pad for a keyboard. The supporting pad comprises a base, a supporting pad body, a pressure-bearing wear-resisting plate, a reinforcing silk screen layer,a sound-absorbing fiber layer, a foam layer, a bamboo charcoal fiber layer, a damping coating layer, a spring layer and a camphor oil insect expelling layer. The supporting pad body is installed on the inner wall of the top of the base. A pressure-bearing wear-resisting plate is mounted on the inner wall of the top of the supporting pad body. A reinforcing silk screen layer is mounted at the bottom of the pressure-bearing wear-resisting plate. A damping coating layer is mounted at the bottom of the reinforcing silk screen layer. A sound-absorbing fiber layer is mounted at the bottom of the damping coating layer. A foam layer is mounted at the bottoms of the sound-absorbing fiber layer. A spring layer is mounted at the bottoms of the foam layer. A bamboo charcoal fiber layer is mounted atthe bottom of the spring layer. A camphor oil insect expelling layer is mounted at the bottom of the bamboo charcoal fiber layer. The lever arm support pad for the keyboard has the advantages that thelever arm support pad for the keyboard is capable of reducing noise, dehumidifying and preventing insects and is convenient to mount.

The invention discloses a high-resilience PVC (polyvinyl chloride) foam pad and a process thereof. The high-resilience PVC foam pad comprises a foam pad main body; the foaming pad main body is sequentially provided with an anti-skid wear-resistant layer, a high-resilience layer, a framework layer and a damp-proof antibacterial layer from top to bottom, the anti-skid wear-resistant layer, the high-resilience layer and the damp-proof antibacterial layer are connected together through a binder, and the framework layer is embedded in the middle lower part of the high-resilience layer; the fiber screen cloth and the bearing parts are arranged in the high-resilience layer, the multiple bearing parts are fixed to the fiber screen cloth to form the net-shaped bearing parts, the net-shaped bearing parts are wrapped with the fluffy foam cotton, each bearing part is filled with the fluffy foam cotton, foaming of the high-resilience layer is fluffy, and the high-resilience layer is more fluffy. The spherical bearing part can accelerate the springback speed of the high-springback layer after being extruded, and can also support the high-springback layer to avoid excessive deformation after being extruded.

The invention discloses a one-way valve. The one-way valve comprises a valve body, and a valve plate mounted in the valve body and capable of being bent in one direction; the valve plate comprises anintake hole plate tightly connected with the inner side wall of the valve body, and a rubber ring connected to the intake hole plate and capable of being bent in one direction; when no gas enters thevalve body, the rubber ring is tightly bonded with the valve body; and when the gas enters from an intake port of the valve body, the rubber ring is bent to form a gap with the valve body. As the rubber ring and the intake hole plate are tightly connected, when the closing is needed, the rebound speed of the rubber ring can be accelerated through the intake hole plate to guarantee no dust to return to the intake port to damage various valves on an intake pipe.

A dust-proof conductive touch body including a dust-proof handles. The dust that has penetrated into the hammer is blocked by a wide range of coverings by the dust-proof handle, and the weight error due to the difference in the construction of the keys is solved. The weight error causes the learner's playing touch to be erroneous, and the dust falls into the bottom and gradually accumulates duringlong-term use, and causes the touch reflection time to fluctuate. The piano has been poorly dustproof for the touch body, and the internal dust cannot handle the problem of the piano being scrapped.After the dust enters the bottom of the key, the dust handle at the bottom of the key blocks and dust is closed. Through the shock of the keys, the fish scale-like dust-removing pieces on the dust-removing table are lifted. The dust is vibrated by multiple quick oscillations, so that the dust does not accumulate inside with fast rebound. The conductive screw can enhance the spring speed of the guide core, greatly speed up the piano's sound time and improve the playing efficiency.

The invention discloses a cold-resistant PVC oil-proof film with high tensile strength and a preparation process thereof. The invention particularly relates to the technical field of PVC film preparation. The film comprises a base film and an elastic film layer, wherein the elastic film layer coats the surface of the base film. The base film is prepared from the following raw materials in parts bymass: 50-80 parts of resin, 5-8 parts of a cold-resistant agent, 6-10 parts of a main plasticizer, 3-5 parts of a modifier, 0.8-1.5 parts of a filler and a proper amount of an auxiliary plasticizer.The PVC oil-proof film is prepared by the steps of mixing the raw materials, preparing a base film, preparing high-elasticity resin, rolling, drying and molding. The EVA resin and the PVC resin of which the average polymerization degree is greater than 2000 are used as main materials, the dosage ratio of the main plasticizer to the auxiliary plasticizer is controlled, and the elastic film layer coats the base film, so that the cold resistance and the tensile strength of the PVC oil-proof film are greatly improved.

The invention discloses a high-precision semiconductor luminescence detection device. The device comprises a supporting frame; the top of the supporting frame is in bolted connection with a workbench; the top of the workbench is in bolted connection with a detection box; the left side of the front surface of the detection box is hinged with a first box door through a hinge; the front surface of the first box door is in bolted connection with a control switch; and a moving mechanism is arranged at the top of the detection box. Through cooperation of a motor, a lead screw, a fixing plate, a fixing rope, a fixing ring, a connecting block and a positioning plate, a user can conveniently drive the fixing rope to move downwards through the motor, and through cooperation of a first guide wheel and a second guide wheel, the user can conveniently reverse the fixing rope; and therefore, the fixing rope can stably drive a moving plate and a brightness sensor to move rightwards through the positioning plate, the position of the brightness sensor can be changed, the brightness data is compared with standard brightness data at the same position, and the user can quickly know whether the semiconductor brightness is qualified or not.

The invention provides a dustproof conductive touch control body used for an accurate conductive contact mechanism. The dustproof conductive touch control body comprises a dustproof handle. The dust infiltrating below the mallet is widely covered and blocked by the dustproof handle so that the problems of wrong playing sense of touch of the learner caused by the weight error produced by the construction difference of the keys, fluctuation change of the touch control reflection time caused by falling of the dust into the bottom and gradual accumulation during long time of use, poor dustproof performance of the piano for the touch control body part and scrapping of the piano caused by no processing of the internal dust can be solved. After the dust enters into the bottom of the keys, the dustproof handle of the bottom of the keys blocks and collects the dust, the scale-shaped dustproof sheets on the dustproof table are enabled to be uplifted through vibration of the keys, the dust is vibrated out through multiple times of rapid vibration, the dust can be prevented from being accumulated inside, the rebound speed is high and the conduction lead screw can enhance the bounce speed of the conductive core so that the sound producing time of the piano can be greatly accelerated and the playing efficiency can be enhanced.

The invention discloses a vehicle collision performance optimization method based on VPI and OLC, comprising the following steps: 1, fitting a VPI curve and an OLC curve to obtain a linear regression formula of the VPI to the OLC when the initial velocity V0 of a vehicle collides with a rigid wall and the average deceleration is A0; 2, not changing the OLC, reducing the average deceleration of the vehicle by optimizing and further optimizing the collision performance of the vehicle body structure, and improving the rebound speed relatively; 3, recalculating the vehicle average deceleration and rebound speed of the vehicle body structure after collision performance optimization, judging whether the vehicle average deceleration and rebound speed meet the relational expression requirements of VPI and OLC or not, and if not, returning to the step 2 for further optimization; if yes, taking that optimization is completed. According to the invention, a linear regression formula of the VPI to the OLC is utilized, and on the premise that the OLC is not changed, the crashworthiness design of the vehicle body structure is guided through the change rule of the VPI.

The invention discloses a supporting device for a transformer of a new energy automobile. The supporting device comprises a transformer body and a supporting frame, wherein the supporting frame is provided with a first containing groove used for containing the transformer body, the transformer body is fixedly arranged in the first containing groove, the face, away from the transformer body, of the supporting frame is provided with a mounting block, the supporting frame is provided with a damping rod corresponding to the mounting block; a first containing hole used for sliding of the damping rod is formed in the mounting block, a longitudinal damping device in linkage with the damping rod is arranged in the first containing hole and comprises a fixing device capable of being automatically adjusted, a transverse damping component is arranged on the mounting block and used for reducing impact caused in a vehicle running process, through the arrangement of the longitudinal damping device and the transverse damping component, shock absorption on impact borne by an automobile in a longitudinal direction and a transverse direction is achieved, meanwhile, through the arrangement of the fixing device, the position of the damping rod is fixed after springback of the damping rod is completed, and therefore the stability after springback is achieved.