141 results about "Shock prevention" patented technology

The invention discloses low-yield ratio and high-strength steel for bridges and a manufacturing method thereof. The steel comprises the following chemical components by weight percent : 0.06-0.10 percent of C, 0.20-0.45 percent of Si, 1.20-1.50 percent of Mn, no more than 0.010 percent of P, no more than 0.0020 percent of S, 0.30-.060 percent of Ni, 0.20-0.50 percent of Cu, 0.15-0.50 percent of Mo, 0.025-0.060 percent of Nb, no more than 0.035 percent of Ti, 0.020-0.040 percent of Alt, and Fe and unavoidable impurities in balancing amount. According to the invention, through smelting, refining, performing a reasonable thermo-mechanical control process (TMCP) and optimizing tempering heat treatment production, the tensile strength of the steel is 700-780 MPa, the yield strength is 530-600MPa, the extensibility is greater than or equal to 18 percent, the yield ratio is less than or equal to 0.80, and 40 below zero DEG C low-temperature longitudinal impact is greater than or equal to 100 J, so that the steel is good in obdurability matching and low in the yield ratio, is provided with excellent performance of shock prevention, and is stable in production process and strong in operability.

A linear light-emitting diode (LED)-based solid-state universal lamp comprising integrated arc and shock prevention switches normally operates with either an electronic ballast or AC mains. When such a universal lamp is installed in or uninstalled from a linear tube lamp fixture, the integrated arc and shock prevention switches can work with an electronic ballast to prevent electric arc from occurring inside the lamp, thus eliminating any possible internal fire hazard while maintaining electric shock free for installers.

A shockproof packing bag includes an upper and a lower bag body combined together and formed with an accommodating chamber therebetween. The upper and the lower bag body are respectively provided with an inner layer and an outer layer, which have their peripheral edges combined together by thermal fusing to form the upper and the lower bag body. The upper and the lower bag body have their peripheral edges attached with a zipper and are respectively formed with an air chamber between the inner and the outer layer. The upper and the lower bag body have one lateral side thermally fused together to form a compressed side having an air tap fitted therein. After inflated, the packing bag will form plural air bags for wrapping and positioning articles therein, having effect of shock prevention, usable repeatedly and highly effectively for environmental protection.

The invention discloses an embedded airfield runway centerline lamp, which comprises a base case (12), a face case (11), a lamp holder (41) arranged on the base case (12), and a light source (42) arranged in the lamp holder (41), wherein the upper end of the light source (42) is provided with a flange (423) exposed out of the upper end surface of the lamp holder (41). The embedded airfield runway centerline lamp also comprises a light source clamping ring (46) pressed and connected onto the flange (423) of the light source (42); two connecting parts are arranged on the external edge of the light source clamping ring (46), two connecting pieces are correspondingly arranged on the lamp holder (41), and the two connecting parts are clamped and connected on the two connecting pieces in a detachable way; in addition, the lamp holder (41) is also provided with a shock pad (47) and is connected with the base case (12) through the shock pad (47). The embedded airfield runway centerline lamp can effectively solve the problem that the tungsten halide lamp is not convenient for replacement after being damaged and the problem of the shock prevention of the tungsten halide lamp.

The invention discloses a computer case with integrated functions of dust prevention and shock prevention. The computer case comprises a case body, the right surface of the inner wall of the case bodyis fixedly connected with the upper surface of a bearing rod through a fixing rod, the lower surface of the bearing rod is fixedly connected with a machine body of a motor, and fan blades are fixedlyconnected to the surface of a motor output shaft. According to the computer case with integrated functions of dust prevention and shock prevention, the case body, the motor, the fan blades, a fixingplate, a second protection net, a first rotation device, a threaded column, a second threaded cylinder, a first spring and a second spring are arranged, by using the elastic effect of the firs springand the second spring, the impact force which is generated when the case body moves downwards can be buffered, vibration of elements in the case body can be effectively avoided, and people can use thecomputer case more conveniently; meanwhile, the service life of the elements in the case body is guaranteed, dust can be effectively prevented from entering the case body by using the second protection net, accordingly, the heat dissipation effect of the elements is guaranteed, and a host can be better used.

The invention discloses a method for producing high-foaming EPE pearl wool by use of a carbon dioxide foaming agent. The EPE pearl wool is prepared from the following raw materials in parts by weight: 60-100 parts of LDPE, 0-40 parts of LLDPE, 30-40 parts of EVA, 15-25 parts of talcum powder, 10-15 parts of light calcium carbonate, 20-30 parts of water glass, 10-15 parts of plant straw powder, 2-3 parts of modified tree ash, 0.5-1 part of isopropyl tri(dioctylpyrophosphate)titanate, 0.5-0.8 part of glycerin monostearate and 0.05-0.1 part of foaming agent carbon dioxide. Through the invention, the produced EPE pearl wool has the advantages of high elasticity, light weight, softness, high strength, good impact resistance, ideal foaming effect, uniform pores, fineness and compactness, good buffer shock prevention, good flame retardance, chemical corrosion resistance, aging resistance and durability.

The invention discloses an array substrate. The array substrate comprises a display area and a GOA (gate on array) circuit area on the outer periphery of the display area. The edge of the array substrate is provided with a static shock prevention protective area around the display area and the GOA circuit area. A first line and at least one second line are arranged in the protective area; the first line is positioned on one side close to the display area and the GOA circuit area and connected with a ground terminal; the second line is positioned on one side close to the edge of the array substrate and is in a suspended state, and the second line is connected with the first line through a capacitor. Since the grounded first line and the at least one suspended second line are arranged at the edge of the array substrate and connected through the capacitor, when reaching the array substrate, static shock first passes through the at least one second line on the outer side and is buffered through the capacitor to finally act on the first line on the inner side, damage risks of the first line can be reduced beneficially, and static protection performance of the array substrate is improved.

The invention relates to a thermal insulation material, which is characterized by comprising: a) a polyethylene bubble layer, b) an aluminum foil layer, c) a weaving cloth layer or a glass fiber layer and / or d) a protective layer, wherein the polyethylene bubble layer comprises at least one layer of polyethylene bubbles; the aluminum foil layer is arranged on one surface of the polyethylene bubble layer. The material is made of environmentally-friendly nonhazardous raw materials, is harmless to human bodies and environment, has light weight, is dustless and convenient to transport and construct, has functions of thermal insulation, sound insulation, moisture prevention and shock prevention, has the performance of light reflection, heat reflection, radiation protection and the like, and has high tightness and barrier property, so the thermal insulation material can be widely applied to building structures such as roofs, walls, floors and the like, protection sleeves such as air conditioners, water heaters, water pipes and ventilating ducts, refrigerating packages, automobile sunshades, moistureproof sandbeach cushions and the like.

The invention relates to the field of concrete additives and discloses a high-performance concrete additive. The high-performance concrete additive comprises the following components in parts by weight: 80-100 parts of a water reduction component, 10-15 parts of an early strength component, 80-100 parts of an energy absorption component, 3-7 parts of a viscosity reduction component and 100-150 parts of water, wherein the water reduction component is a acrylic acid type polycarboxylic acid water reduction component; the early strength component is selected from one or more of calcium formate, calcium nitrate and triethanolamine; the energy absorption component is a light-cured resin component; the viscosity reduction component is polyethylene glycol. The high-performance concrete additive is high in water reduction rate and good in early strength effect and rust prevention effect; besides, shock prevention and energy dissipation effect of concrete are achieved, the cracking of the concrete is avoided, and the durability of the concrete is improved.

The present invention relates to a motor shock prevention structure, which provides a plurality of shock prevention elements enclosed by the inner wall of a shaft tube and the outer wall of a bearing to disengage the bearing from the shaft tube. The shock-absorbent element shall be made of a flexible material being shock-absorbent and damping. Therefore, when a motor rotates, the vibration amplitude generated by rotation of a rotor is isolated and damped by the shock-absorbent elements. Thus, the vibration amplitude won't be transmitted to a base, and the efficacy of electronic system won't be compromised, such that the resonant effect, the vibration and the noise of electronic system can be prevented and the normal efficacy and the operation life span of electronic system can be secured.

Belonging to the technical field of boar semen dilution, the invention relates to a boar antiviral long-acting semen diluent formula and a preparation method. The boar semen diluent comprises: alpha-D-glucopyranose powder, fructose, trisodium citrate dihydrate, ethylenediamine tetraacetic acid disodium, sodium bicarbonate, polyvinyl alcohol, trishydroxymethylaminomethane, inositol, vitamin C, arginine, a radix isatidis injection, a 5% ceftiofur sodium injection, and a 5% Ribavirin injection. The preparation method includes: dissolving all the components in distilled water, mixing the components evenly, and conducting sterilization to obtain the boar semen diluents. The formula involves rich nutrients, antibacterial Chinese and western medicine components and antibacterial components, thus ensuring normal sperm metabolism. After certain period of time at the lower limit of storage temperature, the effects of nutrition and sperm shock prevention can be realized, and the invasion of external bacterial viruses in an artificial insemination process can be avoided.

The invention belongs to a suspended shock absorption and shock prevention workshop. The suspended shock absorption and shock prevention workshop comprises a light structure workshop, a groove type reinforced concrete base and suspended shock absorption platform devices. In the invention, the whole building workshop, a stratum and a rock stratum are divided into two bodies by the groove type base. One group of suspended shock absorption platform devices are arranged on a plane of the base, and the light material workshop is constructed on a shock absorption platform. In a violent earthquake, the building base is not firmly constructed and bound on the stratum or the rock stratum, so that the workshop is constructed on the suspended platform. The suspended shock absorption and shock prevention workshop, provided by the invention, has the advantages that: the impact force of the earthquake can be slowed down for more than 60% by the shock absorption device, and a conventional shock prevention mode of overcoming hardness with hardness is changed into a new shock prevention mode of overcoming hardness with softness, so that disasters caused by the violent earthquake can be reduced greatly, a magnitude 9 earthquake can be reduced to be lower than magnitude 5 from theoretical estimation, and the human can be free from intense fear about the great earthquake.

The invention discloses a skull repairing material which is provided with a titanium mesh bracket. The surface of the titanium mesh bracket is provided with a film layer consisting of hydroxylapatite and titanium dioxide, and one side of the titanium mesh bracket is provided with a bionic layer. The skull repairing material has biological activity, a TiO2 ceramic film layer containing HAP generated on the surface of a titanium mesh through micro-arc oxidation plays a role of biological activity, and HAP in human tissue fluid and skull edges are tightly combined with TiO2 under the role of -OH to reach the function of cell bonding. The bionic layer below the titanium mesh bracket can play a role of cold insulation, heat insulation, shock prevention and buffer, and the entire product is humanized and scientific.

The invention relates to a method for preparing boar semen dilution powder, comprising the following steps: taking 45-55g of dextrose powder, 2.5-3.5g of sodium citrate dehydrate, 0.8-1.2g of sodium ethylene diamine tetracetate, 500-800 thousand units of penethamate, 500-1000 thousand units of dihydrostreptomycin and 2.5-3g of egg yolk dry powder; and evenly mixing the dextrose powder, the egg yolk dry powder, the sodium citrate dehydrate, the sodium ethylene diamine tetracetate, the penethamate and the dihydrostreptomycin to obtain boar semen dilution powder. The method for preparing the egg yolk dry powder comprises the following steps: cooking fresh eggs, taking out yelk and drying the yelk into egg yolk dry powder with a water content of 7-10percent. In the invention, the egg yolk dry powder has rich phosphatidylcholine to ensure the normal metabolism of the semen and has the functions of nutrition and semen shock prevention after a lower limit period at a preserving temperature. The boar semen diluted by adopting the invention has a preserving period not less than five days, ensures a fertility rate above 95percnet and a birth number of 11.6.

The invention discloses a production process of EPE pearl cotton which comprises the following raw materials in parts by weight: 60-70 parts of a base material, 5-10 parts of a nucleating agent, 5-10parts of an antistatic agent, 10-20 parts of a foaming agent and 10-20 parts of an anti-shrinking agent; the base material is LDPE rubber particles, the nucleating agent is gold bubbles, the foaming agent is a butane agent, and the anti-shrinking agent is monoglyceride. According to the production process of the EPE pearl cotton, the base material, the nucleating agent, the antistatic agent, the foaming agent and the anti-shrinking agent are mixed and processed to obtain the EPE pearl cotton having the advantages of good pressure resistance and buffer performance, environmental protection, strong toughness, shock prevention, sound insulation, no deformation and good plasticity, wherein various raw materials are easy to get, the integrated production can be realized, and less pollution exists in the intermediate process; and the problems that the pressure resistance and buffer performance of conventional EPE pearl cotton produced by a general production process are bad, the produced EPEpearl cotton is easy to deform and bad in plasticity and energy saving and environmental protection effects of the production process are not obvious are solved.

The invention discloses a high and low frequency impact resistance cabinet. The cabinet comprises an outer frame and an inner frame arranged in the outer frame, wherein a cabinet plate is wrapped on the exterior of the outer frame, and a shock absorber is arranged at the contacting position of the outer frame and the ground and / or the wall; and the inner frame is fixed in the outer frame through the shock absorbers. The cabinet provided by the invention is divided into the outer frame and the inner frame which are independent, the inner frame is connected with the outer frame through the shock absorbers, the outer frame and a mount point are also connected through the shock absorbers, and the inner and outer shock absorbers can both play the role of vibration damping and shock resistant as well as shock prevention; the shock absorbers arranged the outer frame and the mount point can isolate the low-frequency shock wave, the shock absorbers arranged between the outer frame and the inner frame can isolate the high-frequency shock wave, and the vibration isolation efficiency of the whole cabinet can achieve more than 80%; and the cabinet provided by the invention has the advantages that the whole is simple, the weight is light, and the processing difficulty is low.

The invention belongs to the field of civil engineering shock prevention and shock absorption and relates to a phased yield type mild steel damper. The upper end and the lower end of an arc-shaped mild steel energy-consuming steel piece on the inner layer of the damper are connected with an internal steel piece upper connection plate and an internal steel piece lower connection plate respectively. The upper end and the lower end of an outer-layer arc-shaped mild steel energy-consuming steel piece are connected with an external steel piece upper connection plate and an external steel piece lower connection plate respectively. The inner-layer arc-shaped mild steel energy-consuming steel piece, the internal steel piece upper connection plate and the internal steel piece lower connection plate are connected into a whole and arranged in a cavity formed by the outer-layer arc-shaped mild steel energy-consuming steel piece, the external steel piece upper connection plate and the external steel piece lower connection plate; springs used for force transferring are arranged between the upper portion of the internal steel piece upper connection plate and the lower portion of the external steel piece upper connection plate and between the upper portion of the external steel piece lower connection plate and the lower portion of the internal steel piece lower connection plate; By the design of inner-layer damping and outer-layer damping and the use of the springs for force transferring, phased energy dissipation and shock absorption of the damper is achieved, and the defect that a traditional damper is single in shock absorption level is overcome.

The invention relates to a dolomite magnesia cement pantile and a manufacturing method thereof, which belongs to the field of chemical and building materials. The dolomite magnesia cement pantile comprises caustic dolomite powder, magnesium chloride, a light filler, an inert filler, water and a thermal insulating material, the mass ratio of which is 1.00:0.12 to 0.40:0.10 to 0.60:0.05 to 0.30:0.44 to 1.20:0.05 to 0.30, and a supporting material is properly added. The manufacturing method comprises the following steps of slurry mixing, shaping, curing and maintaining. The produced dolomite magnesia cement pantile for buildings has the advantages of fire protection, thermal insulation, high strength, good water resistance, anticorrosion, shock prevention, easiness in construction, environmental protection, energy conservation, simple production process, low energy consumption and the like, is an updated product for replacing various color steel light partition wall boards, silicate cement partition wall boards and other boards, belongs to an environment-friendly building material and can be widely applied to the building industry.

A steel wire mesh sheet bended formed type reinforced-rebar special-shaped section concrete column-wall board shock isolation house and a method thereof belong to the field of shock prevention and disaster reduction. The steel wire mesh sheet bended formed type reinforced-rebar special-shaped section concrete column adopts steel wire mesh sheets to be bended into a special-shaped steel wire mesh framework. A wall body is made of light ecological panels or wall bricks, the wall panels or the wall bricks are connected with special-shaped columns through concave-convex key grooves, the wall panels are meshed through the concave-convex key grooves, the wall bricks are meshed through the concave-convex key grooves, and reliable connection between the wall panels or the wall bricks is guaranteed. The special-shaped steel wire mesh framework is formed by bending 8# galvanized wire mesh sheets, thereby being convenient in construction. Reserved end grooves at the ends of sections of the columns are connected with the light ecological panels to achieve the purpose of enhancing integrity of the house and improving whole shock resistance and energy dissipation capacity. The house belongs to a rural house which is practical and low in cost and can effectively resolve the problems that the rural house is poor in integrity and weak in shock resistance capacity.

The invention relates to a multifunctional phosphating solution and a preparation method and application thereof. The multifunctional phosphating solution comprises liquid A and liquid B and is characterized in that a ratio of the liquid A to the liquid B in the multifunctional phosphating solution is 1: 0.1-1. The liquid A comprises the following substances, by mass, 26 to 48 parts of diammonium phosphate, 0.9 to 12 parts of phosphoric acid with a concentration of 85%, 0.8 to 1.8 parts of metal powder, 0.6 to 1.4 parts of animal glue, 0.4 to 10 parts of calcined gypsum powder and 0.3 to 0.8 part of alum, with the balance being water. The liquid B comprises the following substances, by mass, 20 to 46 parts of zinc dihydrogen phosphate, 38 to 55 parts of zinc nitrate, 2 to 3.8 parts of sodium fluoride, 2 to 4 parts of zinc oxide and 2 to 6 parts of phosphoric acid with a concentration of 85%, with the balance being water. The multifunctional phosphating solution provided by the invention is composed of the liquid A and the liquid B, can realize removal of oil and rust at the same time and has the efficacy of rust protection, heat insulation, high temperature resistance, heat preservation, flame retardation, noise abatement, shock prevention, isolation, pollution cleaning and resistance to fire. The multifunctional phosphating solution has the following beneficial effects: a fast rust removal speed, great thickness of a formed film, long antirust time, etc.

The invention relates to an environment friendly light-weight composite keel plate comprising an intermediate substrate and surface composite layers adhered to two sides of the intermediate substrate, wherein the surface composite layer consists of a plurality of surface fabric layers and glass fiber cloth layers compounded alternately; the glass fiber cloth layer as the innermost layer of the surface composite layer is adhered to the intermediate substrate; the outermost layer of the surface composite layer is the surface fabric layer; the surface fabric layer is prepared from the following materials by weight part: 5 to 12 parts of FHL solution, 6 to 10 parts of magnesium oxide, 0.5 to 5 parts of filler and 0.5 to 3 parts of HHD agent; and the intermediate substrate comprises the following components by weight part: 26 to 35 parts of composite solution, 34 to 42 parts of magnesium oxide, 12 to 18 parts of filler, 2 to 5 parts of HHD agent and 1 to 5 parts of composite modifier. The invention has the following beneficial effects: the composite light-weight keel plate has good performance in shock prevention and has the characteristics of heat insulation, water resistance, flame resistance, bending prevention, high strength, good tenacity, deformation resistance, low cost, environment friendly performance and the like; and the product is superior in physical and mechanical properties.

The invention discloses a shock prevention automatic scrubber. A power supply battery is detachably installed in the center inside a scrubber body, and the power supply battery is electrically connected to a drive assembly extending out of the bottom end face of the scrubber body to form a drive wheel; the front end of the bottom end face of the scrubber body is provided with a scrubbing brush disc, and the scrubbing brush disc is connected to the drive assembly to make the drive assembly drive the scrubbing brush disc to rotate automatically; a cleaning water tank sprays water on the scrubbing brush disc through a cleaning water pipe; a water suction nozzle is detachably installed at the rear end of the bottom end face of the scrubber body, a waste water tank is arranged at the rear end inside the scrubber body, and the water suction nozzle is connected to a water suction motor and sucks waste water on the floor to the waste water tank through a waste water pipe; two damping springs symmetrically arranged are connected between a roll shaft of the drive wheel and the bottom end face of the scrubber body, and included angles of 45 degrees are formed between the damping springs and the horizontal plane. The shock prevention automatic scrubber is simple in structure, convenient to use, fast in clean and good in cleaning effect and damping effect.

The invention discloses a novel wall heat-insulating material and a preparation process thereof. The novel wall heat-insulating material mainly comprises the following components in parts by weight: 22 to 42 parts of cement, 14 to 23 parts of polyvinyl chloride resin powder, 13 to 26 parts of modified plant straw powder, 3 to 10 parts of dispersible latex powder, 2 to 8 parts of hydroxypropyl methyl cellulose, 1.3 to 6.5 parts of glass bead, 0.3 to 2.2 parts of water-reducing agent, 0.5 to 3.8 parts of coagulation accelerator and 0.2 to 1.4 parts of curing agent. The novel wall heat-insulatingmaterial provided by the invention has the advantages of light weight, high strength, high heat-insulating property, low water-absorbing rate, sound absorption, shock prevention and the like; furthermore, the preparation method is simple and suitable for large-scale production and application.

The invention relates to a large coal bed gas recovering complete device, which comprises a driving machine set, a compression machine set, a heat radiating blower, a gas and liquid separator, a filter and a lubricating oil pump which are fixed on an integrally-horizontal installation machine base with jointed planes. The jointed planes are all parallel to output shafts thereof and vertical to the self gravity thereof. A lubricating oil tank is arranged in the machine base and formed between the rectangular cross sections of the machine base. The gas and liquid separator is provided with a tangential gas and liquid inlet pipe and a vertical outlet pipe provided with a perpendicular downward rotational flow separating device. The installation bottom surface of the machine base is placed on an independent concrete foundation provided with an adjusting sizing block, and the concrete foundation and the ground on the periphery of the concrete foundation are provided with a shock prevention channel. The device has the advantages of good operation reliability and safety, lower chatter and noise during operation and long service life. A skid-mounted assembling and connecting structure is convenient for assembly and maintenance, and the device is particularly suitable for a large or large power coal bed gas recovering system.

The invention discloses an intelligent safety socket comprising a socket body equipped with jacks. The socket body is internally provided with a live line and a zero line which are connected with thejacks. The socket body is also internally provided with a microprocessor, a proximity switch, a relay, a temperature and humidity sensor, an electric leakage detection device, a wireless communicationmodule and a power supply module. The relay is connected between the live line input end and the live line output end of the live line of the socket body. The control end of the relay is connected with the microprocessor. The proximity switch, the temperature and humidity sensor, the electric leakage detection device and the wireless communication module are connected with the microprocessor. Theelectric shock prevention function, the overheat protection function and the remote control function are integrated on the intelligent safety socket.

A gaming machine shock prevention device having a door hingedly coupled to a cabinet of the gaming machine, a gaming machine display positioned between the cabinet and the door, the gaming machine display hingedly coupled to the cabinet, and at least one spring, a first end of the spring coupled to the gaming machine display and a second end of the spring coupled to a cabinet interior, wherein the gaming machine display and door are moveable between a first position which defines the cabinet interior and a second position which exposes the cabinet interior, wherein compression of the at least one spring reduces shock to the gaming machine display when moved to the first position, and wherein opening the door to the second position releases the at least one spring to move the gaming machine display to the second position.

The invention discloses a power adaptor with storage devices. The power adaptor comprises a box body, a box cover, a power adaptor, a connection line and a fixed interface, wherein the box body is ina square shape, the power adaptor is arranged in the box body, the fixed interface is arranged outside the box body, one end of the connection line is connected with the power adaptor, the other end of the connection line is connected with the fixed interface, the storage devices are arranged at two sides of the power adaptor, the storage devices are provided with fixed rotation shafts, the connection line is spirally arranged on the fixed rotation shafts in order, a rotatable handle is arranged at the bottom of the box body and is connected with the fixed rotation shafts, and shockproof buffer devices are arranged at the bottom and on a front side surface and a rear side surface of the power adaptor. The power adaptor has the beneficial effects that the exposed connection line can be stored in the power adaptor, heat generated by the power adaptor can be dissipated out of the box body through cooling holes formed in a side plate of the box body, external dust also can be prevented from entering the box body, the whole cooling effect is good, and shock prevention and dust prevention are achieved.

The utility model provides a simple and easy shockproof spring suitable for shock prevention of an operation part of an expansion valve at low cost. An expansion valve (1) in one scheme comprises a first channel (13) which is formed to penetrate through a main body (2), with a coolant guiding inlet laterally disposed at one end and a coolant guiding outlet laterally disposed at the other end, a valve opening (16) which is disposed in the middle portion of the first channel (13), a valve core (18) which opens and closes the valve by connecting or leaving the valve opening (16), a power element (3) which is used for generating driving force for opening or closing the valve core (18), a shaft (33) which is supported by the main body and transmits the driving force of the power element (3) to the valve core (18), and a shockproof spring (50) which is disposed between the main body (2) and the shaft (33), provides the shaft (33) with potential energy and sliding resistance. The shockproof spring (50) is formed by bending a belt-shaped plate at multiple parts in the extension direction of the plate.

The invention is suitable for the field of hard disks, providing a shock prevention method for a hard disk, a hard disk and a vehicle electronic device. In the shock prevention method for a hard disk, collected acceleration data is compared with the limit value of acceleration supported by the hard disk, when the acceleration data is larger than the limit value of acceleration, the magnetic head of the hard disk returns to a start position and stops reading and writing data of the hard disk so as to prevent the magnetic head of the hard disk from beating the hard disk to form failure points and damage the hard disk.