46results about How to "Avoid blocking the line of sight" patented technology

The invention discloses multifunctional engineering machinery based on an excavator platform. The front part of an operation arm of an excavator is hinged with an execution oil cylinder; a boring frame is vertically arranged in front of the operation arm; the middle of the rear surface of the boring frame is provided with a connection plate; the middle of the connection plate is hinged with the front end of the operation arm, while the upper part of the connection plate is hinged with the piston rod stretching end of the execution oil cylinder; the left surface of the boring frame is provided with two guide rails which are arranged vertically side by side; and a sliding plate is connected with the two guide rails and also can slide up and down along the guide rails under traction of a traction device. The multifunctional engineering machinery integrates excavation, stone crushing, boring and sand rock blasting, the cost for purchasing the engineering machinery can be reduced for users, construction is facilitated, and multiple drill rods can be connected together as required to increase boring depth, so that the problem of insufficient boring depth in the prior art is solved well; in addition, the multifunctional engineering machinery can prevent dust from flying in front of the excavator and consequently prevents the sight of an operator from being influenced.

The invention mainly discloses a full-automatic orthopedic bone drilling, water injection and water pumping integrated device. According to the technical scheme, the device comprises a bone drilling body, the front end of the bone drilling body is provided with a drill bit part, a drill bit of the drill bit part comprises a water injection section and a cooling section, the axis center of the water injection section is provided with a water injection pipeline, and a water inlet and a water outlet which are communicated with the water injection pipeline are formed in the two ends of the surfaceof the water injection section respectively. The front end of the bone drilling body is further provided with a sleeve sleeving the drill bit part, a cooling pipe helically surrounding the cooling section is arranged in the sleeve, and a water outlet end of the cooling pipe is connected with the water inlet. A medicine storage cavity is formed in the bone drilling body, one end of the medicine storage cavity is connected with a first liquid inlet pipe, the other end of the medicine pipe is provided with a second liquid inlet pipe connected with the cooling pipe, and a third liquid inlet pipeis parallelly connected between the first liquid inlet pipe and the second liquid inlet pipe; the upper portion of the sleeve is provided with the water pumping part. The full-automatic orthopedic bone drilling, water injection and water pumping integrated device has the advantages that the size is small, operation is convenient, the bone drilling operation efficiency and quality are improved, theinfection rate is reduced, and the postoperative healing speed is increased.

The invention discloses a harvester with a lifting lower header capable of crushing straws and preventing spatter of the crushed straws. The harvester comprises the lower header, the lower header is hinged on a front axle of the harvester and comprises a lower header main frame, a lower cutting mechanism, a straw crushing mechanism, a driving mechanism and a lower header lifting mechanism, a blocking angle iron preventing spatter of the crushed straws is fixedly connected with the rear of a retaining cover of the lower header main frame, and the lower header lifting mechanism comprises a lower header lifting cylinder, a lower header lifting cylinder upper seat and a lower header lifting cylinder lower seat. According to the harvester with the lifting lower header capable of crushing the straws and preventing spatter of the crushed straws, straws remained after harvest of grains can be cut and crushed, feed quantity of the harvester is relieved, machine loss and threshing load are reduced, threshing effect is improved, cutting stubble is low and flat, lands are conveniently cultivated, cutting and crushing efficiency of the straws is high, crushed straws cannot spatter, the lower header can rise and fall, the height of the cutting stubble is controlled, barriers can be avoided, and device safety is protected.

The invention discloses a lifting type lower cutting table capable of smashing straw and preventing smashed straw from splashing. The lifting type lower cutting table is hinged to a front axle of a harvester and comprises a lower cutting table main frame, a lower cutting mechanism, a straw smashing mechanism, a transmission mechanism and a lower cutting table lifting mechanism; blocking angle iron used for preventing the smashed straw from splashing is fixedly connected to the back portion of a blocking cover of the lower cutting table main frame; the lower cutting table lifting mechanism comprises a lower cutting table lifting oil cylinder, a lower cutting table lifting oil cylinder upper base and a lower cutting table lifting oil cylinder lower base. According to the lifting type lower cutting table capable of smashing the straw and preventing the smashed straw from splashing, straw portions retained after grain harvesting can be cut and smashed, the feeding amount of the harvester is decreased, the machine loss and the threshing load are reduced, and the threshing effect is improved; cut stubbles are low and flat, and therefore ploughing is convenient; the straw cutting and smashing efficiency is high, and the smashed straw cannot splash; meanwhile, lifting can be achieved, therefore, the cut stubble height can be controlled, and the cutting table can keep away from obstacles, so that equipment safety is guaranteed.

The invention provides an anti-fog and anti-oil-stain lens with high light transmission and a preparation method thereof. The lens comprises a lens body, the lens body comprises a lens outer layer surface, a lens base layer and a lens inner layer surface, the lens outer layer surface is located on the outer layer of the lens base layer, the lens inner layer surface is located on the inner layer ofthe lens base layer, the lens outer layer surface comprises an organic solvent type reinforcing liquid, an antireflection layer and a waterproof and oil-stain-resistant protective layer, the waterproof and oil-stain-resistant protective layer is located on the outer layer of the antireflection layer, and the antireflection layer is located on the outer layer of the organic solvent type reinforcing liquid. Through the lens body, the lens outer layer surface, the lens base layer, the lens inner layer surface, the organic solvent type reinforcing liquid, the antireflection layer and the waterproof and oil-stain-resistant protective layer, the device can achieve high light transmittance and anti-fog and oil-stain-resistant functions, and the problems that an existing lens on the market does not have the high light transmittance and anti-fog and oil-stain-resistant functions, and is influenced by the use environment, oil stains and water mist are atomized on the surface of the lens, so that the sight of a user is blocked, and the use of the user is influenced are solved.

A pair of adjustable polarized glasses includes a main glasses frame, glasses legs and a sub glasses frame. The main glasses frame is hinged to the glasses legs. Two bulges are arranged at two sides of the main glasses frame and are fixedly connected to rotary shafts. Two rotary handles are arranged on outer side edges of the sub glasses frame and are hinged to the rotary shafts. The sub glasses frame includes a left sub frame and a right sub frame which are symmetrical to each other, wherein a magnet bar is arranged on inner side edge of each of the left and the right sub frames, and the two magnet bars can be attracted to and connected to each other. In the sub glasses frame, two polarized lenses are arranged and can be rotated in the sub glasses frame. By means of the sub glasses frame, polarized light, for example, light reflected from a blackboard, can be filleted, so that students sitting at the side of a classroom can see texts on the blackboard clearly, and a fisher can see a fishing float on water clearly by filtering reflected light from the water surface. The glasses have simple structure, are convenient to use, have strong functions and are valuable to promote.

The invention discloses a vehicle windshield rain remover. A micro-air compressor and a small gas receiver which are connected in series are installed for replacing an original wiper motor and an original transmission mechanism; one branch of a gas inlet of a wet gas receiver is provided with a pressure limiting valve, and high-pressure air discharged from the pressure limiting valve is led to a gas inlet of the small gas receiver through a pipeline; a normally open solenoid valve is installed at a gas outlet of the small gas receiver, and a high-pressure air nozzle is installed at the lower end of a windshield and can also be installed in the position of an original wiper base, so that high-pressure air discharged from the normally open solenoid valve is sprayed to the windshield; and an adjustable resistor is installed in the position of an original wiper switch. By adopting the vehicle windshield rain remover disclosed by the invention, a rain membrane can not be formed on the windshield, and excessive rain is prevented from accumulating on the windshield and influencing the view; the vehicle windshield rain remover has a relatively good effect on ensuring the safety of a vehicle running in a rainy day, has relatively high practicability and is completely suitable for existing vehicles; and actual measurement shows that the vehicle windshield rain remover has a relatively good effect on clearing some impurities in rain and falling snow.

The invention discloses a control method for vehicle body height compensation of a semi-active suspension, a vehicle is provided with an electronic stability program controller and a semi-active suspension controller, and wheel speed sensors and air springs are arranged at tires of the vehicle; the adjusting method comprises the steps that S1, a vehicle travels for the first time; S2, the electronic stability program controller judges whether the vehicle is provided with a spare tire; S3, the electronic stability program controller sends a second tire position signal to the semi-active suspension controller; S4, the semi-active suspension controller calculates a first target height according to the rolling radius difference value of the radius of the tire and the radius of the spare tire in the design state; the semi-active suspension controller adjusts the air spring to reach a first target height; and S5, the semi-active suspension controller adjusts the air spring to reach the preset height. The defect that the vehicle body height is reduced due to the small rolling radius of the spare tire is overcome, and the driving safety and comfort are improved.

The invention discloses automobile glass capable of being heated. The glass comprises a glass body, electric heating wires and a cavity. Two layers of cavities are formed in the glass body and filledwith water, the electric heating wires are pasted to the adjacent faces of the two layers of cavities, and a temperature control device is pasted to the interior of the glass body. The temperature control device is electrically connected with the electric heating wire. According to the automobile glass, the cavity is formed in the glass body, and the cavity is filled with water, so that when the electric heating wire is used for heating, demisting and defrosting of the automobile glass are facilitated, the surface of the glass can be heated uniformly, the sight of a driver is prevented from being influenced, and safety accidents are prevented from being caused. Through arranging a heat conducting pad, the grooves and the protrusions are arranged, so that connection between the outer layerand the inner layer can be enhanced, the limiting effect is achieved, and the strength of the glass body is improved.

The invention relates to an energy-saving glass curtain wall with a cleaning device, relates to the field of energy-saving curtain walls, and solves the problem that an interlayer between existing double-layer glass curtain walls is inconvenient to clean. The energy-saving glass curtain wall comprises a supporting frame, two glass plates are arranged on the supporting frame, a heat preservation cavity is formed between the two glass plates, and a cleaning assembly is arranged in the heat preservation cavity. The cleaning assembly comprises two supporting plates, cleaning wipers are fixedly connected to the two supporting plates, an elastic piece is arranged between the two supporting plates, an installation cavity is formed in the supporting frame, a plurality of fixing rods are fixedly connected into the installation cavity, the fixing rods are sleeved with spools, volute springs are fixedly connected between the spools and the fixing rods, and connecting lines are wound around the spools. One ends of the connecting lines are connected with the spools, the other ends of the connecting lines are connected with the elastic piece, and the elastic piece is further connected with a pull rope. The energy-saving glass curtain wall has the advantage that workers can conveniently clean the glass interlayer.

The invention relates to the field of charging piles, in particular to an electric vehicle charging device for a single-layer garage, comprising multiple charging guns, multiple gun lines and a charging power supply, wherein one end of each gun line is connected with one charging gun, and the other end of each gun line is connected with the charging power supply; the charging device further comprises multiple sliding guide devices arranged on the wall or the ground; the gun lines are penetratingly arranged on the sliding guide devices and move along the same; the charging device further comprises gun line retracting and releasing devices arranged between the charging power supply and charging gun holders; the charging device further comprises the charging gun holders arranged on the wall or the ground, and the charging guns and the charging gun holders are provided with induction devices; the gun line retracting and releasing devices are provided with control equipment connected with the induction devices. According to the invention, the charging device can solve the problem of charging difficulty of electric vehicles and avoid waste of resources on the basis of not greatly transforming an existing single-layer garage.

The invention relates to building intercom equipment with high reliability, which comprises a main body, a camera, a plurality of keys, a heat dissipation mechanism and a cleaning mechanism, wherein the heat dissipation mechanism comprises a cooling box, a refrigeration rod, an air extraction assembly, an exhaust pipe, a nozzle, a connecting block and a first spring; the cleaning mechanism comprises a draining plate, a connecting box, a sponge block, a fixing plate, an air cylinder, a piston, a connecting rod, a connecting pipe, a water pumping assembly, two moving assemblies and a plurality of spray heads, and the water pumping assembly comprises a connecting unit, a water pumping box, a first connecting pipe, a second connecting pipe, a driving plate and a second spring. The building intercom equipment with high reliability realizes the heat dissipation function for the interior of the main body by means of the heat dissipation mechanism, avoids the situation that normal work of equipment is affected due to overheating of the interior of the main body, improves the reliability of the equipment, achieves the function of cleaning the camera through utilizing the cleaning mechanism,and avoids the situation that dust adheres to the camera and affects the sight of the camera.

The invention discloses anti-radiation glasses with a bluetooth function for computer invention and development. The glasses comprise a metal shaping hose, wherein the outer wall of the two ends of the metal shaping hose are connected with a hollow glasses frame body through screw bolts; the outer wall of the bottom of one side of the hollow glasses frame body is connected with a rubber pad through a hinge; the outer wall of the middle part of the other side of the hollow glasses frame body is connected with a support connecting box through screw bolts; the outer wall of the middle part of oneside of a support connecting box is connected with a blast blower through screw bolts; the outer wall of the middle part of the other side of the support connection box is provided with an first opening; the inner wall of the first opening is connected with a first air guide pipe through screw bolts. The anti-radiation glasses with the bluetooth function for computer invention and development provided by the invention have the advantages that through the arrangement of a bluetooth signal receiver, an earphone conducting wire and an earphone head, the bluetooth signals emitted by the computercan be received; the sound can be listened through the earphone; the practical effects of combining the earphone and the glasses are achieved.

The invention discloses a vehicle-mounted clothes hanger comprising a hanger body (1) in shape of butterfly. Two connecting bars (2) are symmetrically arranged on the bottom of the hanger body (1), a soft sleeve (3) covers outside the hanger body (1), and the bases of the two connecting bars (2) are bent downwards and then connected with two support columns of a seat by connecting covers (4). The invention can conveniently and effectively hang clothes and also improve the safety.

The invention provides a liftable three-dimensional water curtain device for water show, and relates to the technical field of stage machinery. The device comprises a base and a frame body arranged onthe base, wherein the frame body comprises an annular frame, supporting seats and supporting legs used for connecting the annular frame and the supporting seat, spray heads are arranged on the annular frame at intervals, each supporting seat comprises a fixed plate connected with the base and a rotating shaft arranged on the fixed plate, each supporting leg rotates around the rotating shaft, anda balancing weight is arranged at one end, far away from the annular frame, of each supporting leg; the base comprises supporting walls used for supporting the fixed plates and servo electric cylinders arranged on the supporting wall, and the servo electric cylinders are connected with the supporting legs through telescopic links. The liftable three-dimensional water curtain device for water showis simple in structure, various in water spraying direction, energy-saving, environment-friendly and convenient to lift, can be hidden under the water surface when not in use so as to avoid influencing the arrangement of performance scenes and the sight of audiences, and can be turned up from the water surface when needed, thereby meeting the application requirements under different performance scenes.

The application discloses goggles with defogging mechanisms, and mainly relates to the field of defogging goggles. The goggles comprise a goggle frame, wherein a lens is fixed in the goggle frame, a guide groove is formed in the goggle frame, and is formed in two sides of the lens; and the defogging mechanisms are arranged in the guide groove and slide along the guide groove to scrap vapour on twosides of the lens. The goggles disclosed by the application have the beneficial effects that the problem that the goggles are easy to fog, can be solved, the defogging mechanisms are arranged, when the goggles fog, the defogging mechanisms are pushed manually to move along the guide groove, so that the vapour on two sides of the lens can be scraped, and the goggles are convenient and quick to operate, and operation of nursery work is not influenced.

The invention discloses fashionable, concise and convenient-to-wear glasses capable of shielding rain and using method, and belongs to the technical field of glasses. The glasses comprise a glasses frame, two sets of lenses of the same structure are embedded in the glasses frame, glasses legs are hinged to the two ends of the rear side of the glasses frame, and a supporting plate is movably connected to the top of the glasses frame; wherein the middle of the top end of the supporting plate is fixedly connected with an ejector rod, the top end of the ejector rod is fixedly connected with a flashing board; the flashing board is of an inverted-V-shaped structure, and the two sides of the flashing board are communicated with water outlets. The brush can be pressed on a connecting rod while thelength of the glasses legs is adjusted, and therefore when the connecting sleeve is pulled, the brush can be pulled out of the connecting rod. The brush can effectively brush away accumulated dust covering the connecting rod at ordinary times, so that when a user adjusts the length of the glasses leg, the newly exposed length of the glasses leg can be cleaned conveniently and quickly, the lengthof the glasses leg can be changed by pulling the connecting sleeve, and the glasses are convenient for different people to wear and use in a more comfortable mode.

The invention discloses a lift type double-cutting-table harvester capable of pulverizing straws and preventing splashing of the pulverized straws. The harvester comprises an upper cutting table and a lower cutting table, wherein the upper cutting table is hinged to a front axle; the lower cutting table is hinged to the front axle and positioned below the upper cutting table; the upper cutting table comprises an upper cutting table main frame, an upper cutting mechanism, a screw conveyer, a reel and an upper cutting table lifting mechanism; the lower cutting table comprises a lower cutting table main frame, a lower cutting mechanism, a straw pulverizing mechanism, a transmission mechanism and a lower cutting table lifting mechanism; and a first right-angle side of blocking angle iron is welded on the lower edge at the back part of a blocking cover. The lift type double-cutting-table harvester capable of pulverizing straws and preventing splashing of the pulverized straws can cut and pulverize the straw parts remaining after grain harvesting, thereby decreasing the feed quantity of the harvester, reducing the machine loss and threshing load, and improving the threshing effect; the cutting height is low, and stubble is flat, thereby facilitating land cultivation; the cutting and pulverizing efficiency of the straws is high, the straws are uniformly pulverized, and splashing of the pulverized straws can be prevented; and the lower cutting table can be lifted, so that the cutting height can be controlled, and obstacles can be avoided, thereby protecting the safety of the equipment.

An improved European style range hood includes a casing, and a fan assembly and a control assembly, which are arranged in the casing. The bottom of the casing forms a smoke collection chamber recessing to the interior of the casing, a grille is arranged in the smoke collection chamber, and left and right sides and / or rear side of the screen are provided with air inlets with an area 30% -75% of that of the grille. The improved European-style range hood provided by the invention has the following advantages over the prior art: soot is inhaled from the left, right and rear sides of the grille to form an inverted U-shaped soot distribution zone, so that a cook is at a position with relatively low concentration of soot and PM2.5, and the design is good for the health of the cook. While, the above embodiment employs three-side air inlet, which is conducive to enhancing negative pressure at the air lets, increasing air inlet speed and preventing the spread of soot; and the air inlet approach avoids the influence of the soot vortex and disorders on the cook's visual line.

The invention relates to a local block response composite spliced liquid crystal dimming film car window, the car window comprises a window body and a dimming mechanism arranged on the window body in a liftable manner, and the car window is characterized in that the dimming mechanism comprises glass arranged on the window body; the liquid crystal dimming film is arranged in the glass, and the liquid crystal dimming film is made of a flexible material; the functional layer is arranged between the liquid crystal dimming film and the glass; the liquid crystal light adjusting film comprises a first light adjusting film and a second light adjusting film, and the first light adjusting film and the second light adjusting film are spliced. The functional layer comprises a light blocking area, the area where the first light adjusting film and the second light adjusting film are spliced is a connecting area, and the light blocking area corresponds to the connecting area in position and size. The situation that when the dimming area of the liquid crystal dimming film becomes dark, strong light penetrates through the connecting area of the liquid crystal dimming film, the sight of a driver is affected, and potential safety hazards are caused is avoided.

The invention discloses a landscape vehicle for scenic spot patrol security. The landscape vehicle comprises a landscape vehicle, wherein a riding cavity with a left inner wall, a right inner wall, afront inner wall and a rear inner wall communicating with the outside is formed in the landscape vehicle, a circle of annular magnet is fixed to an outer end surface of the riding cavity in a surrounding mode, a supporting table is fixed to an upper end of the landscape vehicle, a shifting mechanism capable of utilizing wind energy is arranged in an upper end of the supporting table, the shiftingmechanism comprises the landscape vehicle which is located in the supporting table and provided with a leftward opening, a buoyancy cavity with an upward opening is further formed in the supporting table, a left inner wall and a right inner wall of the buoyancy cavity communicate with the rotating cavity, and a lifting block is connected into the buoyancy cavity in a sliding manner. The landscapevehicle is simple in structure, the landscape vehicle is simple in structure and convenient to operate, four sides of the landscape vehicle are automatically protected in rainy days or cold air days through mechanical transmission, in the patrol process in the rainy days, the rainwater on the left side protective glass is automatically scraped away through wind energy generated in the driving process, the sight is prevented from being affected by the rainwater, and therefore safety and high efficiency of security patrol are guaranteed.

The invention provides a backrest and an automobile, and relates to the technical field of automobile structures. The backrest comprises a backrest framework, a backup plate, an air bag, an air pump,a driving motor, a filler and skin, wherein the skin is arranged on the outer surface of the filler, the backrest framework is arranged inside the filler, and open holes are formed in the positions corresponding to one end of the filler and one end of the skin; the backup plate is arranged inside the open holes and is in sliding connection with the backrest framework; the air bag is fixed to the end face of one side of the backup plate; the air pump is connected with the air bag and the driving motor separately. According to the scheme, on the basis that the sight line of a driver is not affected, the riding comfort of passengers is improved.

The invention discloses a reaping machine capable of uniformly chopping straws and preventing chopped straws from splashing and having double headers. The reaping machine comprises an upper header and a lower header, wherein the upper header is hinged to a front axle of the reaping machine; the lower header is fixedly welded to the front axle of the reaping machine and is positioned below the upper header; the upper header comprises an upper header main frame, an upper cutting mechanism, an auger, a reel and an upper header lifting mechanism; the lower header comprises a lower header main frame, a lower cutting mechanism, a straw chopping mechanism and a transmission mechanism; a first right-angle side which stops angle iron is welded to the lower edge of the rear of a stopping cover; and a second right-angle side is positioned below the first right-angle side. By the reaping machine capable of uniformly chopping straws and preventing chopped straws from splashing and having the double headers, straws remaining after reaping of grains can be reaped and chopped, the feeding amount of the reaping machine is reduced, and machine loss and threshing load are reduced; stubbles are low and flat, and ploughing is facilitated; and the positioning of cutting blades can be adjusted easily and conveniently, high straw reaping efficiency and uniform chopping are ensured, and meanwhile, the chopped straws cannot be splashed.

The invention belongs to the technical field of hygiene protection articles, and particularly relates to an anti-bacterial and anti-fog mask and a preparation method thereof. The anti-bacteria and anti-fog mask comprises a mask face body and mask hanging belts. The two ends of the mask face body are connected with the mask hanging belts respectively. The mask is characterized in that the mask facebody is composed of a breathing layer, a filtering layer and an antibacterial layer, wherein the breathing layer, the filtering layer and the antibacterial layer are sequentially connected from inside to outside, the filtering layer is composed of first non-woven fabric, second non-woven fabric and third non-woven fabric, the first non-woven fabric, the second non-woven fabric and the third non-woven fabric are sequentially connected from inside to outside, a first folded edge and a second folded edge are arranged on the two sides of the mask face body respectively, and an opening is formed in the second folded edge. The anti-bacterial and anti-fog mask has the anti-bacterial and anti-fog functions, meanwhile, the problems that a mask is poor in fitting performance and leakproofness, andthe skin and ears are prone to damage are solved, a filter element can be pulled and replaced, and the beautifying effect is achieved.

The invention discloses a wearing device of intelligent Bluetooth headset glasses, and particularly relates to the technical field of intelligent wearing equipment, the wearing device comprises a frame body, a support blade, glasses legs and extension rods, an adjusting structure is arranged between one side of the frame body, and a cleaning and brushing structure is arranged between two sides ofthe top end in the frame body; the other side of the top of the frame body is fixedly connected with a hinge seat, the glasses legs are movably connected to the interior of the hinge seat, extension rods are arranged in the glasses legs, telescopic structures are arranged between the extension rods and the glasses legs, and a playing mechanism is arranged on one side of the top ends of the extension rods. The adjusting structure is arranged between one sides of the frame bodies, the glasses legs on the two sides are grabbed to be pulled outwards by a certain distance, at the moment, the sleeveplates slide on the two sides of the connecting plate under the action of the compression springs in the spring grooves, then the glasses are worn on the face, the glasses legs are loosened, and rebound generated by the compression springs can be matched with the supporting blades to clamp the nose bridge in an attached mode, so that the application effect is enhanced.

The invention provides a mask which mainly comprises a mask body and tying belts, and the mask body comprises a wrinkle surface, a flat edge, a pull-limiting elastic line and a nose bridge strip; a wrinkle-free flat edge is arranged on the periphery of the wrinkle surface, and a tension-limiting elastic line perpendicular to each wrinkle line is arranged on the wrinkle surface; the nose bridge strip is arranged on the flat edge of the upper edge. When the mask is packaged and stored, wrinkles are folded into a plane shape, and when the mask is used, the wrinkles are opened to a certain degreeto form a bowl shape. The mask wrinkle structure ensures three-dimensional filtration, the tension-limiting elastic lines can prevent wrinkles from being flattened, the mask can be prevented from being pulled to the lower jaw and covering the neck to lose a filtration effect, and it is ensured that the filtration area is large and the inspiration resistance is small; the structure is simple, the mask conforms to ergonomics, the protection performance is good, and wearing is comfortable.

The invention discloses a safety protection device for tunnel blasting in the technical field of tunnel blasting, and the safety protection device comprises a blasting point protection plate and two side baffles which are mutually fixed to define a vertical protection enclosure with three closed surfaces and one open surface, and the two side baffles are erected on the left side and the right side of the blasting point protection plate; a lifting mechanism, a water storage tank, a protective top plate, protective side plates and a supporting shell are further arranged to perform structural protection on tunnel blasting, the height of the protective top plate can be adjusted according to tunnels with different heights, the device can be suitable for blasting protection of more tunnels with different heights, and the device is of a blasting protection structure with wider adaptability and is worthy of popularization and application. According to the device, dust falling can be achieved through water spraying, tunnel flying dust generated after blasting can be removed as soon as possible, the tunnel blasting condition can be observed conveniently, the sight line is better, the device can roll more conveniently through the rolling wheel assemblies, and the distance between rolling wheels can be adjusted so that the device can be suitable for different road conditions.

The invention discloses a street lamp shade for keeping out rain and shading the sun. The street lamp shade is used for being mounted at the tail end of a 7-shaped lamp post, the 7-shaped lamp post comprises a vertical post standing on the ground and an extension rod, and the extension rod is positioned at the top end of the vertical post and extends to the middle of a street. The street lamp shade is mounted at the tail end, facing to the middle of the street, of the extension rod. The street lamp shade is characterized by comprising a shade body, and a shading net extending to the surroundings is arranged at the edge of the shade body; a plurality of arc-shaped drainage ropes are hung under the shading net, and the two ends of each drainage rope is fixed to the shading net. On sunny days, the shading net can shade the sun, so that the glare of the sun is avoided, and the driving safety is improved. On rainy days, rainwater is blocked by the shading net and is drained out through the drainage ropes, so that the rainwater affecting the sight line in front of eyes is avoided, and traffic accidents caused by the poor sight line is avoided.